USES THEREOF RELATED APPLICATIONS

5 This application claims the benefit of and priority to U.S. Provisional Application No.62/806,142, filed February 15, 2019, the entire contents of which are incorporated herein by reference in its entirety.

FIELD OF THE DISCLOSURE

The present disclosure relates to substituted 3-(1-oxoisoindolin-2-yl)piperidine-2,6-dione compounds and compositions and their use for the treatment of IKAROS Family Zinc Finger 2 (IKZF2)- 10 dependent diseases or disorders or where reduction of IKZF2 or IKZF4 protein levels can ameliorate a disease or disorder.

BACKGROUND OF THE DISCLOSURE IKAROS Family Zinc Finger 2 (IKZF2) (also known as Helios) is one of the five members of the Ikaros family of transcription factors found in mammals. IKZF2 contains four zinc finger domains near the 15 N-terminus, which are involved in DNA binding, and two zinc finger domains at the C-terminus, which are involved in protein dimerization. IKZF2 is about 50% identical with Ikaros family members, Ikaros (IKZF1), Aiolos (IKZF3), and Eos (IKZF4) with highest homology in the zinc finger regions (80%+ identity). These four Ikaros family transcription factors bind to the same DNA consensus site and can heterodimerize with each other when co-expressed in cells. The fifth Ikaros family protein, Pegasus 20 (IKZF5), is only 25% identical to IKZF2, binds a different DNA site than other Ikaros family members and does not readily heterodimerize with the other Ikaros family proteins. IKZF2, IKZF1 and IKZF3 are expressed mainly in hematopoietic cells while IKZF4 and IKZF5 are expressed in a wide variety of tissues. (John, L.B., et al., (2011), Mol. Immunol. 48:1272-1278; Perdomo, J., et al., (2000), J. Biol. Chem. 275:38347-38354.)

25 IKZF2 is believed to have an important role in the function and stability of regulatory T cells (Tregs). IKZF2 is highly expressed at the mRNA and protein level by regulatory T-cell populations. Knockdown of IKZF2 by siRNA has been shown to result in downregulation of FoxP3 and to impair the ability of isolated human CD4+ CD25+ Tregs to block T-cell activation in vitro. Moreover, overexpression of IKZF2 in isolated murine Tregs has been shown to increase expression of Treg related markers such as 30 CD103 and GITR and the IKZF2 overexpressing cells showed increased suppression of responder T-cells.

IKZF2 has also been found to bind the promoter of FoxP3, the defining transcription factor of the regulatory T-cell lineage, and to affect FoxP3 expression.

Knockout of IKZF2 within FoxP3-expressing Tregs in mice has been shown to cause activated Tregs to lose their inhibitory properties, to express T-effector cytokines, and to take on T-effector functions. 35 IKZF2 knockout mutant mice develop autoimmune disease by 6-8 months of age, with increased numbers of activated CD4 and CD8 T cells, follicular helper T cells and germinal center B cells. This observed effect is believed to be cell intrinsic, as Rag2-/- mice given bone marrow from IKZF2 knockout mice, but not bone marrow from IKZF2+/+ develop autoimmune disease. Direct evidence that IKZF2 affects regulatory T-cell function has been shown in the analysis of mice in which IKZF2 was deleted only in FoxP3 expressing cells (FoxP3-YFP-Cre Heliosfl/fl). The results showed that the mice also develop autoimmune disease with similar features as observed in the whole animal IKZF2 knockout. Moreover, pathway analysis 5 of a CHIP-SEQ experiment has also suggested that IKZF2 is affecting expression of genes in the STAT5/IL-2Ra pathway in regulatory T-cells. This effect of IKZF2 loss was shown to be more apparent after an immune challenge (viral infection or injection with sheep’s blood), and it was noted that after immune stimulation, the IKZF2 negative regulatory T cells began to take on features of effector T cells. (Getnet, D., et al., Mol. Immunol. (2010), 47:1595-1600; Bin Dhuban, K.., et al., (2015), J. Immunol. 10 194 :3687-96; Kim, H-J., et al., (2015), Science 350 :334-339; Nakawaga, H., et al., (2016) PNAS, 113:

6248-6253)

Overexpression of Ikaros isoforms which lack the DNA binding regions have been shown to be associated with multiple human haematological malignancies. Recently, mutations in the IKZF2 gene, which lead to abnormal splicing variants, have been identified in adult T-cell leukemias and low 15 hypodiploid acute lymphoblastic leukemia. It has been proposed that these isoforms, which are capable of dimerization, have a dominant negative effect on Ikaros family transcription factors which primes the development of lymphomas. IKZF2 knockout mutants that survive into adulthood do not develop lymphomas, supporting this hypothesis (Asanuma, S., et al., (2013), Cancer Sci. 104:1097-1106; Zhang, Z., et al., (2007), Blood 109:2190-2197; Kataoka, D., et al., (2015), Nature Genetics 47:1304-1315.) 20 Currently, anti-CTLA4 antibodies are used in the clinic to target Tregs in tumors. However, targeting CTLA4 often causes systemic activation of T-effector cells, resulting in excessive toxicity and limiting therapeutic utility. Up to 3/4 of patients treated with a combination of anti-PD1 and anti-CTLA4 have reported grade 3 or higher adverse events. Thus, a strong need exists to provide compounds that target Tregs in tumors without causing systemic activation of T-effector cells.

25 An IKZF2-specific degrader has the potential to focus the enhanced immune response to areas within or near tumors providing a potentially more tolerable and less toxic therapeutic agent for the treatment of cancer.

SUMMARY OF THE DISCLOSURE

The compounds of the disclosure have use as therapeutic agents, particularly for cancers and related 30 diseases. In one aspect, the compounds of the disclosure have IKZF2 degrader activity, preferably having such activity at or below the 50 µM level, and more preferably having such activity at or below the 10 µM level. In another aspect, the compounds of the disclosure have degrader activity for IKZF2 that is selective over one or more of IKZF1, IKZF3, IKZF4, and/or IKZF5. In another aspect, the compounds of the disclosure have degrader activity for both IKZF2 and IKZF4. The compounds of the disclosure have 35 usefulness in treating cancer and other diseases for which such degrader activity would be beneficial for the patient. For example, while not intending to be bound by any theory, the inventors believe that reducing levels of IKZF2 in Tregs in a tumor may allow the patient immune system to more effectively attack the disease. In summary, the present disclosure provides novel IKZF2 degraders useful for the treatment of cancer and other diseases.

A first aspect of the present disclosure relates to compounds of Formula (I)

5 wherein:

X ₁ is CR ₃ ;

is optionally a double bond when X ₁ is CR ₃ and R ₃ is absent;

X ₂ is N and X ₃ is CR ₁₄ ; or X ₂ is CR ₁₃ and X ₃ is N; or X ₂ is CR ₁₅ and X ₃ is CR ₁₄ ; or X ₂ is CR ₁₃ and X ₃ is CR ₁₆ ;

10 each R ₁ is independently D, (C ₁ -C ₆ )alkyl, (C ₁ -C ₆ )haloalkyl, (C ₁ -C ₆ )hydroxyalkyl, CN, or halogen, or two R1 together with the carbon atoms to which they are attached form (C3-C7)cycloalkyl or a 4- to 6- membered heterocycloalkyl ring comprising 1 to 3 heteroatoms selected from O, N, and S, or two R ₁ , when on adjacent atoms, together with the atoms to which they are attached form a (C ₆ -C ₁₀ )aryl ring or a 5- or 6-membered heteroaryl ring comprising 1 to 3 heteroatoms selected from O, N, and S; 15 R ₂ is (C ₁ -C ₆ )alkyl, (C ₆ -C ₁₀ )aryl, 5- or 6-membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, (C ₃ -C ₈ )cycloalkyl, or 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the alkyl is optionally substituted with one or more R ₄ ; and the aryl, heteroaryl, cycloalkyl, and heterocycloalkyl are optionally substituted with one or more R ₅ , or

20 R ₁ and R ₂ , when on adjacent atoms, together with the atoms to which they are attached form a 5- or 6- membered heterocycloalkyl ring;

R ₃ is H or D, or R ₃ is absent when s a double bond;

each R ₄ is independently selected from -C(O)OR ₆ , -C(O)NR ₆ R _6' , -NR ₆ C(O)R _6' , halogen, -OH, -NH ₂ , CN, (C ₆ -C ₁₀ )aryl, 5- or 6-membered heteroaryl comprising 1 to 4 heteroatoms selected from O, N, and S, 25 (C ₃ -C ₈ )cycloalkyl, and 4- to 7-membered heterocycloalkyl ring comprising 1 to 3 heteroatoms

selected from O, N, and S, wherein the aryl, heteroaryl, cycloalkyl, and heterocycloalkyl groups are optionally substituted with one or more R ₇ ;

each R ₅ is independently selected from (C ₁ -C ₆ )alkyl, (C ₂ -C ₆ )alkenyl, (C ₂ -C ₆ )alkynyl, (C ₁ -C ₆ )alkoxy, (C ₁ -C ₆ )haloalkyl, (C ₁ -C ₆ )haloalkoxy, (C ₁ -C ₆ )hydroxyalkyl, halogen, -OH, -NH ₂ , CN, (C ₃ -C ₇ )cycloalkyl, 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, (C ₆ -C ₁₀ )aryl, and 5- or 6-membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, or

two R ₅ , when on adjacent atoms, together with the atoms to which they are attached form a (C ₆ -C ₁₀ )aryl 5 ring or a 5- or 6-membered heteroaryl ring comprising 1 to 3 heteroatoms selected from O, N, and S, optionally substituted with one or more R ₁₀ , or

two R ₅ , when on adjacent atoms, together with the atoms to which they are attached form a

(C ₅ -C ₇ )cycloalkyl ring or a 5- to 7-membered heterocycloalkyl ring comprising 1 to 3 heteroatoms selected from O, N, and S optionally substituted with one or more R ₁₀ ;

10 R6 and R6' are each independently H, (C ₁ -C ₆ )alkyl, or (C6-C10)aryl;

each R ₇ is independently selected from (C ₁ -C ₆ )alkyl, (C ₂ -C ₆ )alkenyl, (C ₂ -C ₆ )alkynyl, (C ₁ -C ₆ )alkoxy, (C ₁ -C ₆ )haloalkyl, (C ₁ -C ₆ )haloalkoxy, -C(O)R ₈ , -(CH ₂ ) _0-3 C(O)OR ₈ , -C(O)NR ₈ R ₉ , -NR ₈ C(O)R ₉ , - NR ₈ C(O)OR ₉ , -S(O) _p NR ₈ R ₉ , -S(O) _p R ₁₂ , (C ₁ -C ₆ )hydroxyalkyl, halogen, -OH, -O(CH ₂ ) _1-3 CN, -NH ₂ , CN, -O(CH ₂ ) _0-3 (C ₆ -C ₁₀ )aryl, adamantyl, -O(CH ₂ ) _0-3 -5- or 6-membered heteroaryl comprising 1 to 3 15 heteroatoms selected from O, N, and S, (C ₆ -C ₁₀ )aryl, monocyclic or bicyclic 5- to 10-membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, (C ₃ -C ₇ )cycloalkyl, and 5- to 7- membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the alkyl is optionally substituted with one or more R ₁₁ , and the aryl, heteroaryl, and heterocycloalkyl are optionally substituted with one or more substituents each independently selected from halogen, 20 (C ₁ -C ₆ )alkyl, (C ₁ -C ₆ )haloalkyl, and (C ₁ -C ₆ )alkoxy, or

two R ₇ together with the carbon atom to which they are attached form a =(O), or

two R ₇ , when on adjacent atoms, together with the atoms to which they are attached form a (C ₆ -C ₁₀ )aryl ring or a 5- or 6-membered heteroaryl ring comprising 1 to 3 heteroatoms selected from O, N, and S, optionally substituted with one or more R ₁₀ , or

25 two R ₇ together with the atoms to which they are attached form a (C ₅ -C ₇ ) cycloalkyl ring or a 5- to 7- membered heterocycloalkyl ring comprising 1 to 3 heteroatoms selected from O, N, and S, optionally substituted with one or more R ₁₀ ;

R ₈ and R ₉ are each independently H or (C ₁ -C ₆ )alkyl;

each R ₁₀ is independently selected from (C ₁ -C ₆ )alkyl, (C ₁ -C ₆ )alkoxy, (C ₁ -C ₆ )haloalkyl,

30 (C ₁ -C ₆ )haloalkoxy, (C ₁ -C ₆ )hydroxyalkyl, halogen, -OH, -NH2, and CN, or

two R ₁₀ together with the carbon atom to which they are attached form a =(O);

each R ₁₁ is independently selected from CN, (C ₁ -C ₆ )alkoxy, (C ₆ -C ₁₀ )aryl, and 5- to 7-membered

heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the aryl and heterocycloalkyl are optionally substituted with one or more substituents each independently selected 35 from (C ₁ -C ₆ )alkyl, (C ₁ -C ₆ )alkoxy, (C ₁ -C ₆ )haloalkyl, (C ₁ -C ₆ )haloalkoxy, (C ₁ -C ₆ )hydroxyalkyl, halogen, -OH, -NH ₂ , and CN; R ₁₂ is (C ₁ -C ₆ )alkyl, (C ₁ -C ₆ )haloalkyl, (C ₆ -C ₁₀ )aryl, or 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S;

R13 is H, halogen, -OH, or -NH2;

R ₁₄ is H, (C ₁ -C ₃ )alkyl, (C ₁ -C ₃ )alkoxy, (C ₁ -C ₃ )haloalkyl, (C ₁ -C ₃ )haloalkoxy, (C ₁ -C ₃ )hydroxyalkyl, 5 halogen, -OH, -NH ₂ , -NO ₂ , or CN;

R ₁₅ is halogen, -OH, or -NH ₂ ;

R ₁₆ is (C ₁ -C ₃ )alkyl, (C ₁ -C ₃ )alkoxy, (C ₁ -C ₃ )haloalkyl, (C ₁ -C ₃ )haloalkoxy, (C ₁ -C ₃ )hydroxyalkyl, halogen, -OH, -NH ₂ , -NO ₂ , or CN;

R _x is H or D;

10 p is 0, 1, or 2;

n is 0, 1, or 2;

n1 is 1 or 2, wherein n + n1 £ 3; and

q is 0, 1, 2, 3, or 4;

or pharmaceutically acceptable salts, hydrates, solvates, prodrugs, stereoisomers, and tautomers 15 thereof.

In one aspect of the disclosure, the hydrogens in the compound of Formula (I) are present in their normal isotopic abundances. In a preferred aspect of the disclosure, the hydrogens are isotopically enriched in deuterium (D), and in a particularly preferred aspect of the invention the hydrogen at position R _x is enriched in D, as discussed in more detail concerning isotopes and isotopic enrichment below.

20 Another aspect of the present disclosure relates to a pharmaceutical composition comprising a therapeutically effective amount of a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, and a pharmaceutically acceptable carrier or excipient. The pharmaceutical composition is useful in the treatment of IKZF2-dependent diseases or disorders. The pharmaceutical composition may further comprise at least one additional pharmaceutical 25 agent.

In another aspect, the present disclosure relates to a pharmaceutical composition comprising a therapeutically effective amount of a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, and a pharmaceutically acceptable carrier or excipient for use in the treatment of an IKZF2-dependent disease or disorder by reducing IKZF2 protein 30 levels wherein reduction of IKZF2 protein levels treats the IKZF2-dependent disease or disorder. The pharmaceutical composition is useful in the treatment of IKZF2-dependent diseases or disorders. The pharmaceutical composition may further comprise at least one additional pharmaceutical agent.

Another aspect of the present disclosure relates to a pharmaceutical composition comprising a therapeutically effective amount of a compound of Formula (I), or a pharmaceutically acceptable salt, 35 hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, and a pharmaceutically acceptable carrier or excipient. The pharmaceutical composition is useful in the treatment of diseases or disorders affected by the reduction of IKZF2 protein levels. The pharmaceutical composition may further comprise at least one additional pharmaceutical agent.

In another aspect, the present disclosure relates to a pharmaceutical composition comprising a therapeutically effective amount of a compound of Formula (I), or a pharmaceutically acceptable salt, 5 hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, and a pharmaceutically acceptable carrier or excipient for use in the treatment of a disease or disorder affected by the reduction of IKZF2 protein levels wherein reduction of IKZF2 protein levels treats the disease or disorder. The pharmaceutical composition may further comprise at least one additional pharmaceutical agent.

Another aspect of the present disclosure relates to a method of degrading IKZF2 comprising 10 administering to the patient in need thereof a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof.

In another aspect, the present disclosure relates to a method of treating a disease or disorder that is affected by the modulation of IKZF2 protein levels comprising administering to the patient in need thereof a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, 15 or tautomer thereof.

Another aspect of the present disclosure relates to a method of modulating IKZF2 protein levels comprising administering to the patient in need thereof a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof.

In another aspect, the present disclosure relates to a method of reducing the proliferation of a cell 20 the method comprising, contacting the cell with a compound of Formula (I), or a pharmaceutically

acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, and reducing IKZF2 protein levels.

Another aspect of the present disclosure relates to a method of treating cancer comprising administering to the patient in need thereof a compound of Formula (I), or a pharmaceutically acceptable 25 salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof. In one embodiment, the cancer is

selected from non-small cell lung cancer (NSCLC), melanoma, triple-negative breast cancer (TNBC), nasopharyngeal cancer (NPC), microsatellite stable colorectal cancer (mssCRC), thymoma, carcinoid, acute myelogenous leukemia, and gastrointestinal stromal tumor (GIST). In another embodiment, the cancer is a cancer for which the immune response is deficient or an immunogenic cancer.

30 In another aspect, the present disclosure relates to a method for reducing IKZF2 protein levels in a subject comprising the step of administering to a subject in need thereof a therapeutically effective amount of a compound of Formula (I), or a pharmaceutically acceptable salt.

Another aspect of the present disclosure relates to a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for use in 35 the treatment of a disease or disorder that is affected by the reduction of IKZF2 protein levels.

In another aspect, the present disclosure relates to the use of a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, in the manufacture of a medicament for treating a disease or disorder that is affected by the reduction of IKZF2 protein levels.

Another aspect of the present disclosure relates to a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for use in 5 the manufacture of a medicament for treating a disease or disorder associated with the reduction of IKZF2 protein levels. In one embodiment, the disease or disorder is selected from non-small cell lung cancer (NSCLC), melanoma, triple-negative breast cancer (TNBC), nasopharyngeal cancer (NPC), microsatellite stable colorectal cancer (mssCRC), thymoma, carcinoid, acute myelogenous leukemia, and

gastrointestinal stromal tumor (GIST).

10 In another aspect, the present disclosure relates to the use of a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, in the treatment of a disease or disorder associated with the reduction of IKZF2 protein levels. In one embodiment, the disease or disorder is selected from non-small cell lung cancer (NSCLC), melanoma, triple-negative breast cancer (TNBC), nasopharyngeal cancer (NPC), microsatellite stable colorectal 15 cancer (mssCRC), thymoma, carcinoid, acute myelogenous leukemia, and gastrointestinal stromal tumor (GIST).

In another aspect of the disclosure, the compounds according to the disclosure are formulated into pharmaceutical compositions comprising an effective amount, preferably a pharmaceutically effective amount, of a compound according to the disclosure or salt, hydrate, solvate, prodrug, stereoisomer, or 20 tautomer thereof, and a pharmaceutically acceptable excipient or carrier.

In some embodiments of the methods disclosed herein, the administration of the compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, is performed orally, parentally, subcutaneously, by injection, or by infusion.

The present disclosure provides degraders of IKZF2 that are therapeutic agents in the treatment of 25 diseases such as cancer and metastasis, in the treatment of diseases affected by the modulation of IKZF2 protein levels, and in the treatment IKZF2-dependent diseases or disorders.

In one embodiment, the disease or disorder that can be treated by the compounds of the present disclosure is selected from non-small cell lung cancer (NSCLC), melanoma, triple-negative breast cancer (TNBC), nasopharyngeal cancer (NPC), microsatellite stable colorectal cancer (mssCRC), thymoma, 30 carcinoid, gastrointestinal stromal tumor (GIST), prostate cancer, breast carcinoma, lymphomas, leukaemia, myeloma, bladder carcinoma, colon cancer, cutaneous melanoma, hepatocellular carcinoma, endometrial cancer, ovarian cancer, cervical cancer, lung cancer, renal cancer, glioblastoma multiform, glioma, thyroid cancer, parathyroid tumor, nasopharyngeal cancer, tongue cancer, pancreatic cancer, esophageal cancer, cholangiocarcinoma, gastric cancer, soft tissue sarcomas, rhabdomyosarcoma (RMS), synovial sarcoma, 35 osteosarcoma, rhabdoid cancers, and Ewing’s sarcoma. In another embodiment, the IKZF2-dependent disease or disorder is a cancer for which the immune response is deficient or an immunogenic cancer. The present disclosure provides agents with novel mechanisms of action toward IKZF2 proteins in the treatment of various types of diseases including cancer and metastasis, in the treatment of diseases affected by the modulation of IKZF2 protein levels, and in the treatment IKZF2-dependent diseases or disorders. Ultimately the present disclosure provides the medical community with a novel pharmacological 5 strategy for the treatment of diseases and disorders associated with IKZF2 proteins.

The present disclosure provides agents with novel mechanisms of action toward IKZF2 proteins in the treatment of various types of diseases including cancer and metastasis, in the treatment of diseases affected by the modulation of IKZF2 protein levels, and in the treatment IKZF2-dependent diseases or disorders. Ultimately, the present disclosure provides the medical community with a novel pharmacological 10 strategy for the treatment of diseases and disorders associated with IKZF2 proteins.

DETAILED DESCRIPTION OF THE DISCLOSURE

The present disclosure relates to compounds and compositions that are capable of modulating IKZF2 protein levels. The disclosure features methods of treating, preventing, or ameliorating a disease or disorder in which IKZF2 plays a role by administering to a patient in need thereof a therapeutically effective 15 amount of a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof. The methods of the present disclosure can be used in the treatment of a variety of IKZF2-dependent diseases and disorders by modulating IKZF2 protein levels. Modulation of IKZF2 protein levels through degradation provides a novel approach to the treatment, prevention, or amelioration of diseases including, but not limited to, cancer and metathesis, and other IKZF2-dependent 20 diseases or disorders.

In one aspect, the compounds of the disclosure have use as therapeutic agents, particularly for cancers and related diseases. In one aspect, the compounds of the disclosure have IKZF2 degradation activity, preferably having such activity at or below the 50 µM level, and more preferably having such activity at or below the 10 µM level. In another aspect, the compounds of the disclosure have degrader 25 activity for IKZF2 that is selective over one or more of IKZF1, IKZF3, IKZF4, and/or IKZF5. In another aspect, the compounds of the disclosure have degrader activity for both IKZF2 and IKZF4. The compounds of the disclosure have usefulness in treating cancer and other diseases for which such degradation activity would be beneficial for the patient. For example, while not intending to be bound by any theory, the inventors believe that reducing levels of IKZF2 in Tregs in a tumor may allow the patient immune system 30 to more effectively attack the disease. In summary, the present disclosure provides novel IKZF2 degraders useful for the treatment of cancer and other diseases.

In a first aspect of the disclosure, the compounds of Formula (I) are described:

or pharmaceutically acceptable salts, hydrates, solvates, prodrugs, stereoisomers, and tautomers thereof, wherein R ₁ , R ₂ , R _x , X ₁ , X ₂ , X ₃ , n, n1,and q are as defined herein.

The details of the disclosure are set forth in the accompanying description below. Although 5 methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present disclosure, illustrative methods and materials are now described. Other features, objects, and advantages of the disclosure will be apparent from the description and from the claims. In the specification and the appended claims, the singular forms also include the plural unless the context clearly dictates otherwise. Unless defined otherwise, all technical and scientific terms used herein have the same meaning 10 as commonly understood by one of ordinary skill in the art to which this disclosure belongs. All patents and publications cited in this specification are incorporated herein by reference in their entireties.

Definition of Terms and Conventions Used

Terms not specifically defined herein should be given the meanings that would be given to them by one of skill in the art in light of the disclosure and the context. As used in the specification and appended 15 claims, however, unless specified to the contrary, the following terms have the meaning indicated and the following conventions are adhered to.

A. Chemical Nomenclature, Terms, and Conventions

In the groups, radicals, or moieties defined below, the number of carbon atoms is often specified preceding the group, for example, (C ₁ -C ₁₀ )alkyl means an alkyl group or radical having 1 to 10 carbon 20 atoms. In general, for groups comprising two or more subgroups, the last named group is the radical attachment point, for example,“alkylaryl” means a monovalent radical of the formula alkyl-aryl-, while “arylalkyl” means a monovalent radical of the formula aryl-alkyl-. Furthermore, the use of a term designating a monovalent radical where a divalent radical is appropriate shall be construed to designate the respective divalent radical and vice versa. Unless otherwise specified, conventional definitions of terms 25 control and conventional stable atom valences are presumed and achieved in all formulas and groups. The articles“a” and“an” refer to one or more than one (e.g., to at least one) of the grammatical object of the article. By way of example,“an element” means one element or more than one element.

The term“and/or” means either“and” or“or” unless indicated otherwise.

The term“optionally substituted” means that a given chemical moiety (e.g., an alkyl group) can 30 (but is not required to) be bonded other substituents (e.g., heteroatoms). For instance, an alkyl group that is optionally substituted can be a fully saturated alkyl chain (e.g., a pure hydrocarbon). Alternatively, the same optionally substituted alkyl group can have substituents different from hydrogen. For instance, it can, at any point along the chain be bounded to a halogen atom, a hydroxyl group, or any other substituent described herein. Thus, the term“optionally substituted” means that a given chemical moiety has the potential to contain other functional groups, but does not necessarily have any further functional groups. 5 Suitable substituents used in the optional substitution of the described groups include, without limitation, halogen, oxo, -OH, -CN, -COOH, -CH ₂ CN, -O-(C ₁ -C ₆ )alkyl, (C ₁ -C ₆ )alkyl, (C ₁ -C ₆ )alkoxy, (C ₁ -C ₆ )haloalkyl, (C ₁ -C ₆ )haloalkoxy, -O-(C ₂ -C ₆ )alkenyl, -O-(C ₂ -C ₆ )alkynyl, (C ₂ -C ₆ )alkenyl, (C ₂ -C ₆ )alkynyl, -OH, - OP(O)(OH) ₂ , -OC(O)(C ₁ -C ₆ )alkyl, -C(O)(C ₁ -C ₆ )alkyl, -OC(O)O(C ₁ -C ₆ )alkyl, -NH ₂ , -NH((C ₁ -C ₆ )alkyl), - N((C ₁ -C ₆ )alkyl) ₂ , -NHC(O)(C ₁ -C ₆ )alkyl, -C(O)NH(C ₁ -C ₆ )alkyl, -S(O) ₂ (C ₁ -C ₆ )alkyl, -S(O)NH(C ₁ -C ₆ )alkyl, 10 and S(O)N((C ₁ -C ₆ )alkyl)2. The substituents can themselves be optionally substituted.“Optionally substituted” as used herein also refers to substituted or unsubstituted whose meaning is described below.

The term“substituted” means that the specified group or moiety bears one or more suitable substituents wherein the substituents may connect to the specified group or moiety at one or more positions. For example, an aryl substituted with a cycloalkyl may indicate that the cycloalkyl connects to one atom of 15 the aryl with a bond or by fusing with the aryl and sharing two or more common atoms.

The term“unsubstituted” means that the specified group bears no substituents.

Unless otherwise specifically defined,“aryl” means a cyclic, aromatic hydrocarbon group having 1 to 3 aromatic rings, including monocyclic or bicyclic groups such as phenyl, biphenyl, or naphthyl. When containing two aromatic rings (bicyclic, etc.), the aromatic rings of the aryl group are optionally joined at 20 a single point (e.g., biphenyl), or fused (e.g., naphthyl). The aryl group is optionally substituted by one or more substituents, e.g., 1 to 5 substituents, at any point of attachment. Exemplary substituents include, but are not limited to, -H, -halogen, -CN, -O-(C ₁ -C ₆ )alkyl, (C ₁ -C ₆ )alkyl, -O-(C ₂ -C ₆ )alkenyl, -O-(C ₂ -C ₆ )alkynyl, (C ₂ -C ₆ )alkenyl, (C ₂ -C ₆ )alkynyl, -OH, -OP(O)(OH) ₂ , -OC(O)(C ₁ -C ₆ )alkyl, -C(O)(C ₁ -C ₆ )alkyl, - OC(O)O(C ₁ -C ₆ ) alkyl, NH ₂ , NH((C ₁ -C ₆ )alkyl), N((C ₁ -C ₆ )alkyl) ₂ , -S(O) ₂ -(C ₁ -C ₆ )alkyl, -S(O)NH(C ₁ - 25 C ₆ )alkyl, and S(O)N((C ₁ -C ₆ )alkyl) ₂ . The substituents are themselves optionally substituted. Furthermore, when containing two fused rings, the aryl groups optionally have an unsaturated or partially saturated ring fused with a fully saturated ring. Exemplary ring systems of these aryl groups include, but are not limited to, phenyl, biphenyl, naphthyl, anthracenyl, phenalenyl, phenanthrenyl, indanyl, indenyl, tetrahydronaphthalenyl, tetrahydrobenzoannulenyl, and the like.

30 Unless otherwise specifically defined,“heteroaryl” means a monovalent monocyclic aromatic radical of 5 to 24 ring atoms or a polycyclic aromatic radical, containing one or more ring heteroatoms selected from N, O, or S, the remaining ring atoms being C. Heteroaryl as herein defined also means a bicyclic heteroaromatic group wherein the heteroatom is selected from N, O, or S. The aromatic radical is optionally substituted independently with one or more substituents described herein. Examples include, but 35 are not limited to, furyl, thienyl, pyrrolyl, pyridyl, pyrazolyl, pyrimidinyl, imidazolyl, isoxazolyl, oxazolyl, oxadiazolyl, pyrazinyl, indolyl, thiophen-2-yl, quinolyl, benzopyranyl, isothiazolyl, thiazolyl, thiadiazole, indazole, benzimidazolyl, thieno[3,2-b]thiophene, triazolyl, triazinyl, imidazo[1,2-b]pyrazolyl, furo[2,3- c]pyridinyl, imidazo[1,2-a]pyridinyl, indazolyl, pyrrolo[2,3-c]pyridinyl, pyrrolo[3,2-c]pyridinyl, pyrazolo[3,4-c]pyridinyl, thieno[3,2-c]pyridinyl, thieno[2,3-c]pyridinyl, thieno[2,3-b]pyridinyl, benzothiazolyl, indolyl, indolinyl, indolinonyl, dihydrobenzothiophenyl, dihydrobenzofuranyl, benzofuran, chromanyl, thiochromanyl, tetrahydroquinolinyl, dihydrobenzothiazine, dihydrobenzoxanyl, quinolinyl, 5 isoquinolinyl, 1,6-naphthyridinyl, benzo[de]isoquinolinyl, pyrido[4,3-b][1,6]naphthyridinyl, thieno[2,3- b]pyrazinyl, quinazolinyl, tetrazolo[1,5-a]pyridinyl, [1,2,4]triazolo[4,3-a]pyridinyl, isoindolyl, pyrrolo[2,3-b]pyridinyl, pyrrolo[3,4-b]pyridinyl, pyrrolo[3,2-b]pyridinyl, imidazo[5,4-b]pyridinyl, pyrrolo[1,2-a]pyrimidinyl, tetrahydropyrrolo[1,2-a]pyrimidinyl, 3,4-dihydro-2H-1D ² -pyrrolo[2,1- b]pyrimidine, dibenzo[b,d]thiophene, pyridin-2-one, furo[3,2-c]pyridinyl, furo[2,3-c]pyridinyl, 1H-10 pyrido[3,4-b][1,4]thiazinyl, benzooxazolyl, benzoisoxazolyl, furo[2,3-b]pyridinyl, benzothiophenyl, 1,5- naphthyridinyl, furo[3,2-b]pyridine, [1,2,4]triazolo[l,5-a]pyridinyl, benzo[1,2,3]triazolyl, imidazo[1,2- a]pyrimidinyl, [1,2,4]triazolo[4,3-b]pyridazinyl, benzo[c][1,2,5]thiadiazolyl, benzo[c][1,2,5]oxadiazole, 1,3-dihydro-2H-benzo[d]imidazol-2-one, 3,4-dihydro-2H-pyrazolo[1,5-b][1,2]oxazinyl, 4,5,6,7- tetrahydropyrazolo[1,5-a]pyridinyl, thiazolo[5,4 d]thiazolyl, imidazo[2,1-b][1,3,4]thiadiazolyl, thieno[2,3- 15 b]pyrrolyl, 3H-indolyl, and derivatives thereof. Furthermore, when containing two fused rings the aryl groups herein defined may have an unsaturated or partially saturated ring fused with a fully saturated ring. Exemplary ring systems of these heteroaryl groups include indolinyl, indolinonyl, dihydrobenzothiophenyl, dihydrobenzofuran, chromanyl, thiochromanyl, tetrahydroquinolinyl, dihydrobenzothiazine,3,4-dihydro- lH-isoquinolinyl, 2,3-dihydrobenzofuran, indolinyl, indolyl, and dihydrobenzoxanyl.

20 Halogen or“halo” mean fluorine, chlorine, bromine, or iodine.

“Alkyl” means a straight or branched chain saturated hydrocarbon containing 1-12 carbon atoms. Examples of a (C ₁ -C ₆ )alkyl group include, but are not limited to, methyl, ethyl, propyl, butyl, pentyl, hexyl, isopropyl, isobutyl, sec-butyl, tert-butyl, isopentyl, neopentyl, and isohexyl.

“Alkoxy” means a straight or branched chain saturated hydrocarbon containing 1-12 carbon atoms 25 containing a terminal“O” in the chain, e.g., -O(alkyl). Examples of alkoxy groups include, without limitation, methoxy, ethoxy, propoxy, butoxy, t-butoxy, or pentoxy groups.

“Alkenyl” means a straight or branched chain unsaturated hydrocarbon containing 2-12 carbon atoms. The“alkenyl” group contains at least one double bond in the chain. The double bond of an alkenyl group can be unconjugated or conjugated to another unsaturated group. Examples of alkenyl groups include 30 ethenyl, propenyl, n-butenyl, iso-butenyl, pentenyl, or hexenyl. An alkenyl group can be unsubstituted or substituted and may be straight or branched.

“Alkynyl” means a straight or branched chain unsaturated hydrocarbon containing 2-12 carbon atoms. The“alkynyl” group contains at least one triple bond in the chain. Examples of alkenyl groups include ethynyl, propargyl, n-butynyl, iso-butynyl, pentynyl, or hexynyl. An alkynyl group can be 35 unsubstituted or substituted.

“Alkylene” or“alkylenyl” means a divalent alkyl radical. Any of the above mentioned monovalent alkyl groups may be an alkylene by abstraction of a second hydrogen atom from the alkyl. As herein defined, alkylene may also be a (C ₁ -C ₆ )alkylene. An alkylene may further be a (C ₁ -C ₄ )alkylene. Typical alkylene groups include, but are not limited to, -CH ₂ -, -CH(CH ₃ )-, -C(CH ₃ ) ₂ -, -CH ₂ CH ₂ -, -CH ₂ CH(CH ₃ )-, - CH ₂ C(CH ₃ ) ₂ -, -CH ₂ CH ₂ CH ₂ -, -CH ₂ CH ₂ CH ₂ CH-, and the like.

“Cycloalkyl” or“carbocyclyl” means a monocyclic or polycyclic saturated or partially unsaturated 5 non-aromatic carbon ring containing 3-18 carbon atoms. Examples of cycloalkyl groups include, without limitations, cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptanyl, cyclooctanyl, norboranyl, norborenyl, bicyclo[2.2.2]octanyl, or bicyclo[2.2.2]octenyl and derivatives thereof. A (C ₃ -C ₈ )cycloalkyl is a cycloalkyl group containing between 3 and 8 carbon atoms. A cycloalkyl group can be fused (e.g., decalin) or bridged (e.g., norbornane).

10 “Heterocyclyl” or“heterocycloalkyl” means a saturated or partially saturated monocyclic or polycyclic ring containing carbon and at least one heteroatom selected from oxygen, nitrogen, or sulfur (O, N, or S) and wherein there is not delocalized n electrons (aromaticity) shared among the ring carbon or heteroatoms. The heterocycloalkyl ring structure may be substituted by one or more substituents. The substituents can themselves be optionally substituted. Examples of heterocyclyl rings include, but are not 15 limited to, oxetanyl, azetadinyl, tetrahydrofuranyl, tetrahydropyranyl, pyrrolidinyl, oxazolinyl, oxazolidinyl, thiazolinyl, thiazolidinyl, pyranyl, thiopyranyl, tetrahydropyranyl, dioxalinyl, piperidinyl, morpholinyl, thiomorpholinyl, thiomorpholinyl S-oxide, thiomorpholinyl S-dioxide, piperazinyl, azepinyl, oxepinyl, diazepinyl, tropanyl, oxazolidinonyl, 1,4-dioxanyl, dihydrofuranyl, 1,3-dioxolanyl, imidazolidinyl, imidazolinyl, dithiolanyl, and homotropanyl.

20 “Hydroxyalkyl” means an alkyl group substituted with one or more -OH groups. Examples of hydroxyalkyl groups include HO-CH ₂ -, HO-CH ₂ CH ₂ -, and CH ₂ -CH(OH)-.

“Haloalkyl” means an alkyl group substituted with one or more halogens. Examples of haloalkyl groups include, but are not limited to, trifluoromethyl, difluoromethyl, pentafluoroethyl, trichloromethyl, etc.

25 “Haloalkoxy” means an alkoxy group substituted with one or more halogens. Examples of haloalkyl groups include, but are not limited to, trifluoromethoxy, difluoromethoxy, pentafluoroethoxy, trichloromethoxy, etc.

“Cyano” means a substituent having a carbon atom joined to a nitrogen atom by a triple bond, e.g., CºN.

30 “Amino” means a substituent containing at least one nitrogen atom (e.g., NH2).

“Pomalidomide” or 4-amino-2-(2,6-dioxopiperidin-3-yl)isoindoline-1,3-dione has the following structure:

B. Salt, Prodrug, Derivative, and Solvate Terms and Conventions

“Prodrug” or“prodrug derivative” mean a covalently-bonded derivative or carrier of the parent compound or active drug substance which undergoes at least some biotransformation prior to exhibiting its pharmacological effect(s). In general, such prodrugs have metabolically cleavable groups and are rapidly 5 transformed in vivo to yield the parent compound, for example, by hydrolysis in blood, and generally include esters and amide analogs of the parent compounds. The prodrug is formulated with the objectives of improved chemical stability, improved patient acceptance and compliance, improved bioavailability, prolonged duration of action, improved organ selectivity, improved formulation (e.g., increased hydrosolubility), and/or decreased side effects (e.g., toxicity). In general, prodrugs themselves have weak 10 or no biological activity and are stable under ordinary conditions. Prodrugs can be readily prepared from the parent compounds using methods known in the art, such as those described in A Textbook of Drug Design and Development, Krogsgaard-Larsen and H. Bundgaard (eds.), Gordon & Breach, 1991, particularly Chapter 5:“Design and Applications of Prodrugs”; Design of Prodrugs, H. Bundgaard (ed.), Elsevier, 1985; Prodrugs: Topical and Ocular Drug Delivery, K.B. Sloan (ed.), Marcel Dekker, 1998; 15 Methods in Enzymology, K. Widder et al. (eds.), Vol.42, Academic Press, 1985, particularly pp.309-396;

Burger’s Medicinal Chemistry and Drug Discovery, 5th Ed., M. Wolff (ed.), John Wiley & Sons, 1995, particularly Vol.1 and pp. 172-178 and pp. 949-982; Pro-Drugs as Novel Delivery Systems, T. Higuchi and V. Stella (eds.), Am. Chem. Soc., 1975; Bioreversible Carriers in Drug Design, E.B. Roche (ed.), Elsevier, 1987, each of which is incorporated herein by reference in their entireties.

20 “Pharmaceutically acceptable prodrug” as used herein means a prodrug of a compound of the disclosure which is, within the scope of sound medical judgment, suitable for use in contact with the tissues of humans and lower animals without undue toxicity, irritation, allergic response, and the like, commensurate with a reasonable benefit/risk ratio, and effective for their intended use, as well as the zwitterionic forms, where possible.

25 “Salt” means an ionic form of the parent compound or the product of the reaction between the parent compound with a suitable acid or base to make the acid salt or base salt of the parent compound. Salts of the compounds of the present disclosure can be synthesized from the parent compounds which contain a basic or acidic moiety by conventional chemical methods. Generally, the salts are prepared by reacting the free base or acid parent compound with stoichiometric amounts or with an excess of the desired 30 salt-forming inorganic or organic acid or base in a suitable solvent or various combinations of solvents.

“Pharmaceutically acceptable salt” means a salt of a compound of the disclosure which is, within the scope of sound medical judgment, suitable for use in contact with the tissues of humans and lower animals without undue toxicity, irritation, allergic response, and the like, commensurate with a reasonable benefit/risk ratio, generally water or oil-soluble or dispersible, and effective for their intended use. The term 35 includes pharmaceutically-acceptable acid addition salts and pharmaceutically-acceptable base addition salts. As the compounds of the present disclosure are useful in both free base and salt form, in practice, the use of the salt form amounts to use of the base form. Lists of suitable salts are found in, e.g., S.M. Birge et al., J. Pharm. Sci., 1977, 66, pp.1-19, which is hereby incorporated by reference in its entirety.

“Pharmaceutically-acceptable acid addition salt” means those salts which retain the biological effectiveness and properties of the free bases and which are not biologically or otherwise undesirable, 5 formed with inorganic acids such as hydrochloric acid, hydrobromic acid, hydroiodic acid, sulfuric acid, sulfamic acid, nitric acid, phosphoric acid, and the like, and organic acids such as acetic acid, trichloroacetic acid, trifluoroacetic acid, adipic acid, alginic acid, ascorbic acid, aspartic acid, benzenesulfonic acid, benzoic acid, 2-acetoxybenzoic acid, butyric acid, camphoric acid, camphorsulfonic acid, cinnamic acid, citric acid, digluconic acid, ethanesulfonic acid, glutamic acid, glycolic acid, glycerophosphoric acid, 10 hemisulfic acid, heptanoic acid, hexanoic acid, formic acid, fumaric acid, 2-hydroxyethanesulfonic acid (isethionic acid), lactic acid, maleic acid, hydroxymaleic acid, malic acid, malonic acid, mandelic acid, mesitylenesulfonic acid, methanesulfonic acid, naphthalenesulfonic acid, nicotinic acid, 2- naphthalenesulfonic acid, oxalic acid, pamoic acid, pectinic acid, phenylacetic acid, 3-phenylpropionic acid, picric acid, pivalic acid, propionic acid, pyruvic acid, pyruvic acid, salicylic acid, stearic acid, succinic acid, 15 sulfanilic acid, tartaric acid, p-toluenesulfonic acid, undecanoic acid, and the like.

“Pharmaceutically-acceptable base addition salt” means those salts which retain the biological effectiveness and properties of the free acids and which are not biologically or otherwise undesirable, formed with inorganic bases such as ammonia or hydroxide, carbonate, or bicarbonate of ammonium or a metal cation such as sodium, potassium, lithium, calcium, magnesium, iron, zinc, copper, manganese, 20 aluminum, and the like. Particularly preferred are the ammonium, potassium, sodium, calcium, and magnesium salts. Salts derived from pharmaceutically-acceptable organic nontoxic bases include salts of primary, secondary, and tertiary amines, quaternary amine compounds, substituted amines including naturally occurring substituted amines, cyclic amines and basic ion-exchange resins, such as methylamine, dimethylamine, trimethylamine, ethylamine, diethylamine, triethylamine, isopropylamine, tripropylamine, 25 tributylamine, ethanolamine, diethanolamine, 2-dimethylaminoethanol, 2-diethylaminoethanol, dicyclohexylamine, lysine, arginine, histidine, caffeine, hydrabamine, choline, betaine, ethylenediamine, glucosamine, methylglucamine, theobromine, purines, piperazine, piperidine, N-ethylpiperidine, tetramethylammonium compounds, tetraethylammonium compounds, pyridine, N,N-dimethylaniline, N- methylpiperidine, N-methylmorpholine, dicyclohexylamine, dibenzylamine, N,N-dibenzylphenethylamine, 30 1-ephenamine, N,N’-dibenzylethylenediamine, polyamine resins, and the like. Particularly preferred organic nontoxic bases are isopropylamine, diethylamine, ethanolamine, trimethylamine, dicyclohexylamine, choline, and caffeine.

“Solvate” means a complex of variable stoichiometry formed by a solute, for example, a compound of Formula (I)) and solvent, for example, water, ethanol, or acetic acid. This physical association may 35 involve varying degrees of ionic and covalent bonding, including hydrogen bonding. In certain instances, the solvate will be capable of isolation, for example, when one or more solvent molecules are incorporated in the crystal lattice of the crystalline solid. In general, such solvents selected for the purpose of the disclosure do not interfere with the biological activity of the solute. Solvates encompasses both solution- phase and isolatable solvates. Representative solvates include hydrates, ethanolates, methanolates, and the like.

“Hydrate” means a solvate wherein the solvent molecule(s) is/are water.

5 The compounds of the present disclosure as discussed below include the free base or acid thereof, their salts, solvates, and prodrugs and may include oxidized sulfur atoms or quaternized nitrogen atoms in their structure, although not explicitly stated or shown, particularly the pharmaceutically acceptable forms thereof. Such forms, particularly the pharmaceutically acceptable forms, are intended to be embraced by the appended claims.

10 C. Isomer Terms and Conventions

“Isomers” means compounds having the same number and kind of atoms, and hence the same molecular weight, but differing with respect to the arrangement or configuration of the atoms in space. The term includes stereoisomers and geometric isomers.

“Stereoisomer” or“optical isomer” mean a stable isomer that has at least one chiral atom or 15 restricted rotation giving rise to perpendicular dissymmetric planes (e.g., certain biphenyls, allenes, and spiro compounds) and can rotate plane-polarized light. Because asymmetric centers and other chemical structure exist in the compounds of the disclosure which may give rise to stereoisomerism, the disclosure contemplates stereoisomers and mixtures thereof. The compounds of the disclosure and their salts include asymmetric carbon atoms and may therefore exist as single stereoisomers, racemates, and as mixtures of 20 enantiomers and diastereomers. Typically, such compounds will be prepared as a racemic mixture. If desired, however, such compounds can be prepared or isolated as pure stereoisomers, i.e., as individual enantiomers or diastereomers, or as stereoisomer-enriched mixtures. As discussed in more detail below, individual stereoisomers of compounds are prepared by synthesis from optically active starting materials containing the desired chiral centers or by preparation of mixtures of enantiomeric products followed by 25 separation or resolution, such as conversion to a mixture of diastereomers followed by separation or recrystallization, chromatographic techniques, use of chiral resolving agents, or direct separation of the enantiomers on chiral chromatographic columns. Starting compounds of particular stereochemistry are either commercially available or are made by the methods described below and resolved by techniques well-known in the art.

30 “Enantiomers” means a pair of stereoisomers that are non-superimposable mirror images of each other.

“Diastereoisomers” or“diastereomers” mean optical isomers which are not mirror images of each other.

“Racemic mixture” or“racemate” mean a mixture containing equal parts of individual enantiomers. 35 “Non-racemic mixture” means a mixture containing unequal parts of individual enantiomers.

“Geometrical isomer” means a stable isomer, which results from restricted freedom of rotation about double bonds (e.g., cis-2-butene and trans-2-butene) or in a cyclic structure (e.g., cis-1,3- dichlorocyclobutane and trans-1,3-dichlorocyclobutane). Because carbon-carbon double (olefinic) bonds, C=N double bonds, cyclic structures, and the like may be present in the compounds of the disclosure, the disclosure contemplates each of the various stable geometric isomers and mixtures thereof resulting from the arrangement of substituents around these double bonds and in these cyclic structures. The substituents 5 and the isomers are designated using the cis/trans convention or using the E or Z system, wherein the term “E” means higher order substituents on opposite sides of the double bond, and the term“Z” means higher order substituents on the same side of the double bond. A thorough discussion of E and Z isomerism is provided in J. March, Advanced Organic Chemistry: Reactions, Mechanisms, and Structure, 4th ed., John Wiley & Sons, 1992, which is hereby incorporated by reference in its entirety. Several of the following 10 examples represent single E isomers, single Z isomers, and mixtures of E/Z isomers. Determination of the E and Z isomers can be done by analytical methods such as x-ray crystallography, ¹ H NMR, and ¹³ C NMR.

Some of the compounds of the disclosure can exist in more than one tautomeric form. As mentioned above, the compounds of the disclosure include all such tautomers.

It is well-known in the art that the biological and pharmacological activity of a compound is 15 sensitive to the stereochemistry of the compound. Thus, for example, enantiomers often exhibit strikingly different biological activity including differences in pharmacokinetic properties, including metabolism, protein binding, and the like, and pharmacological properties, including the type of activity displayed, the degree of activity, toxicity, and the like. Thus, one skilled in the art will appreciate that one enantiomer may be more active or may exhibit beneficial effects when enriched relative to the other enantiomer or when 20 separated from the other enantiomer. Additionally, one skilled in the art would know how to separate, enrich, or selectively prepare the enantiomers of the compounds of the disclosure from this disclosure and the knowledge of the prior art.

Thus, although the racemic form of drug may be used, it is often less effective than administering an equal amount of enantiomerically pure drug; indeed, in some cases, one enantiomer may be 25 pharmacologically inactive and would merely serve as a simple diluent. For example, although ibuprofen had been previously administered as a racemate, it has been shown that only the S-isomer of ibuprofen is effective as an anti-inflammatory agent (in the case of ibuprofen, however, although the R-isomer is inactive, it is converted in vivo to the S-isomer, thus, the rapidity of action of the racemic form of the drug is less than that of the pure S-isomer). Furthermore, the pharmacological activities of enantiomers may have 30 distinct biological activity. For example, S-penicillamine is a therapeutic agent for chronic arthritis, while R-penicillamine is toxic. Indeed, some purified enantiomers have advantages over the racemates, as it has been reported that purified individual isomers have faster transdermal penetration rates compared to the racemic mixture. See U.S. Pat. Nos.5,114,946 and 4,818,541.

Thus, if one enantiomer is pharmacologically more active, less toxic, or has a preferred disposition 35 in the body than the other enantiomer, it would be therapeutically more beneficial to administer that enantiomer preferentially. In this way, the patient undergoing treatment would be exposed to a lower total dose of the drug and to a lower dose of an enantiomer that is possibly toxic or an inhibitor of the other enantiomer.

Preparation of pure enantiomers or mixtures of desired enantiomeric excess (ee) or enantiomeric purity are accomplished by one or more of the many methods of (a) separation or resolution of enantiomers, 5 or (b) enantioselective synthesis known to those of skill in the art, or a combination thereof. These resolution methods generally rely on chiral recognition and include, for example, chromatography using chiral stationary phases, enantioselective host-guest complexation, resolution or synthesis using chiral auxiliaries, enantioselective synthesis, enzymatic and nonenzymatic kinetic resolution, or spontaneous enantioselective crystallization. Such methods are disclosed generally in Chiral Separation Techniques: A Practical 10 Approach (2nd Ed.), G. Subramanian (ed.), Wiley-VCH, 2000; T.E. Beesley and R.P.W. Scott, Chiral Chromatography, John Wiley & Sons, 1999; and Satinder Ahuja, Chiral Separations by Chromatography, Am. Chem. Soc., 2000. Furthermore, there are equally well-known methods for the quantitation of enantiomeric excess or purity, for example, GC, HPLC, CE, or NMR, and assignment of absolute configuration and conformation, for example, CD ORD, X-ray crystallography, or NMR.

15 In general, all tautomeric forms and isomeric forms and mixtures, whether individual geometric isomers or stereoisomers or racemic or non-racemic mixtures, of a chemical structure or compound is intended, unless the specific stereochemistry or isomeric form is specifically indicated in the compound name or structure.

D. Pharmaceutical Administration and Treatment Terms and Conventions

20 A“patient” or“subject” is a mammal, e.g., a human, mouse, rat, guinea pig, dog, cat, horse, cow, pig, or nonhuman primate, such as a monkey, chimpanzee, baboon or, rhesus. In certain embodiments, the subject is a primate. In yet other embodiments, the subject is a human.

An“effective amount” or“therapeutically effective amount” when used in connection with a compound means an amount of a compound of the present disclosure that (i) treats or prevents the particular 25 disease, condition, or disorder, (ii) attenuates, ameliorates, or eliminates one or more symptoms of the particular disease, condition, or disorder, or (iii) prevents or delays the onset of one or more symptoms of the particular disease, condition, or disorder described herein.

The terms“pharmaceutically effective amount” or“therapeutically effective amount” means an amount of a compound according to the disclosure which, when administered to a patient in need thereof, 30 is sufficient to effect treatment for disease-states, conditions, or disorders for which the compounds have utility. Such an amount would be sufficient to elicit the biological or medical response of a tissue, system, or patient that is sought by a researcher or clinician. The amount of a compound of according to the disclosure which constitutes a therapeutically effective amount will vary depending on such factors as the compound and its biological activity, the composition used for administration, the time of administration, 35 the route of administration, the rate of excretion of the compound, the duration of treatment, the type of disease-state or disorder being treated and its severity, drugs used in combination with or coincidentally with the compounds of the disclosure, and the age, body weight, general health, sex, and diet of the patient. Such a therapeutically effective amount can be determined routinely by one of ordinary skill in the art having regard to their own knowledge, the prior art, and this disclosure.

As used herein, the term“pharmaceutical composition” refers to a compound of the disclosure, or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, together 5 with at least one pharmaceutically acceptable carrier, in a form suitable for oral or parenteral administration.

“Carrier” encompasses carriers, excipients, and diluents and means a material, composition or vehicle, such as a liquid or solid filler, diluent, excipient, solvent or encapsulating material, involved in carrying or transporting a pharmaceutical agent from one organ, or portion of the body, to another organ, or portion of the body of a subject.

10 A subject is“in need of” a treatment if such subject would benefit biologically, medically, or in quality of life from such treatment (preferably, a human).

As used herein, the term“inhibit”,“inhibition”, or“inhibiting” refers to the reduction or suppression of a given condition, symptom, or disorder, or disease, or a significant decrease in the baseline activity of a biological activity or process.

15 As used herein, the term“treat”,“treating", or "treatment" of any disease or disorder refers to alleviating or ameliorating the disease or disorder (i.e., slowing or arresting the development of the disease or at least one of the clinical symptoms thereof); or alleviating or ameliorating at least one physical parameter or biomarker associated with the disease or disorder, including those which may not be discernible to the patient.

20 As used herein, the term“prevent”,“preventing", or“prevention” of any disease or disorder refers to the prophylactic treatment of the disease or disorder; or delaying the onset or progression of the disease or disorder.

“Pharmaceutically acceptable” means that the substance or composition must be compatible chemically and/or toxicologically, with the other ingredients comprising a formulation, and/or the mammal 25 being treated therewith.

“Disorder” means, and is used interchangeably with, the terms disease, condition, or illness, unless otherwise indicated.

“Administer”,“administering”, or“administration” means to either directly administering a disclosed compound or pharmaceutically acceptable salt of the disclosed compound or a composition to a 30 subject, or administering a prodrug derivative or analog of the compound or pharmaceutically acceptable salt of the compound or composition to the subject, which can form an equivalent amount of active compound within the subject’s body.

“Prodrug” means a compound which is convertible in vivo by metabolic means (e.g., by hydrolysis) to a disclosed compound.

35 “Compounds of the present disclosure”,“compounds of the disclosure”, and equivalent expressions (unless specifically identified otherwise) refer to compounds of Formulae (I), (Ia), (Ib), (Ic), (Id), (Ie), (If), (Ig), (Ih), (Ii), (Ij), (Ik), and (Il), as herein described including the tautomers, the prodrugs, salts particularly the pharmaceutically acceptable salts, and the solvates and hydrates thereof, where the context so permits thereof, as well as all stereoisomers (including diastereoisomers and enantiomers), rotamers, tautomers, and isotopically labelled compounds (including deuterium substitutions), as well as inherently formed moieties (e.g., polymorphs, solvates and/or hydrates). For purposes of this disclosure, solvates and hydrates are 5 generally considered compositions. In general and preferably, the compounds of the disclosure and the formulas designating the compounds of the disclosure are understood to only include the stable compounds thereof and exclude unstable compounds, even if an unstable compound might be considered to be literally embraced by the compound formula. Similarly, reference to intermediates, whether or not they themselves are claimed, is meant to embrace their salts and solvates, where the context so permits. For the sake of 10 clarity, particular instances when the context so permits are sometimes indicated in the text, but these instances are purely illustrative and it is not intended to exclude other instances when the context so permits. “Stable compound” or“stable structure” means a compound that is sufficiently robust to survive isolation to a useful degree of purity from a reaction mixture, and formulation into an efficacious therapeutic or diagnostic agent. For example, a compound, which would have a“dangling valency” or is a carbanion 15 is not a compound contemplated by the disclosure.

In a specific embodiment, the term“about” or“approximately” means within 20%, preferably within 10%, and more preferably within 5% of a given value or range.

The yield of each of the reactions described herein is expressed as a percentage of the theoretical yield.“Cancer” means any cancer caused by the proliferation of malignant neoplastic cells, such as tumors, 20 neoplasms, carcinomas, sarcomas, leukemias, lymphomas, and the like. For example, cancers include, but are not limited to, mesothelioma, leukemias, and lymphomas such as cutaneous T-cell lymphomas (CTCL), noncutaneous peripheral T-cell lymphomas, lymphomas associated with human T-cell lymphotrophic virus (HTLV) such as adult T-cell leukemia/lymphoma (ATLL), B-cell lymphoma, acute nonlymphocytic leukemias, chronic lymphocytic leukemia, chronic myelogenous leukemia, acute myelogenous leukemia, 25 lymphomas, and multiple myeloma, non-Hodgkin lymphoma, acute lymphatic leukemia (ALL), chronic lymphatic leukemia (CLL), Hodgkin’s lymphoma, Burkitt lymphoma, adult T-cell leukemia lymphoma, acute-myeloid leukemia (AML), chronic myeloid leukemia (CML), or hepatocellular carcinoma. Further examples include myelodisplastic syndrome, childhood solid tumors such as brain tumors, neuroblastoma, retinoblastoma, Wilms’ tumor, bone tumors, and soft-tissue sarcomas, common solid tumors of adults such 30 as head and neck cancers (e.g., oral, laryngeal, and nasopharyngeal), esophageal cancer, genitourinary cancers (e.g., prostate, bladder, renal, uterine, ovarian, testicular), lung cancer (e.g., small-cell and non- small cell), breast cancer, pancreatic cancer, melanoma, and other skin cancers, stomach cancer, brain tumors, tumors related to Gorlin’s syndrome (e.g., medulloblastoma, meningioma, etc.), and liver cancer. Additional exemplary forms of cancer which may be treated by the subject compounds include, but are not 35 limited to, cancer of skeletal or smooth muscle, stomach cancer, cancer of the small intestine, rectum carcinoma, cancer of the salivary gland, endometrial cancer, adrenal cancer, anal cancer, rectal cancer, parathyroid cancer, and pituitary cancer. Additional cancers that the compounds described herein may be useful in preventing, treating, and studying are, for example, colon carcinoma, familiary adenomatous polyposis carcinoma, and hereditary non-polyposis colorectal cancer, or melanoma. Further, cancers include, but are not limited to, labial carcinoma, larynx carcinoma, hypopharynx carcinoma, tongue carcinoma, salivary gland carcinoma, 5 gastric carcinoma, adenocarcinoma, thyroid cancer (medullary and papillary thyroid carcinoma), renal carcinoma, kidney parenchyma carcinoma, cervix carcinoma, uterine corpus carcinoma, endometrium carcinoma, chorion carcinoma, testis carcinoma, urinary carcinoma, melanoma, brain tumors such as glioblastoma, astrocytoma, meningioma, medulloblastoma and peripheral neuroectodermal tumors, gall bladder carcinoma, bronchial carcinoma, multiple myeloma, basalioma, teratoma, retinoblastoma, 10 choroidea melanoma, seminoma, rhabdomyosarcoma, craniopharyngeoma, osteosarcoma, chondrosarcoma, myosarcoma, liposarcoma, fibrosarcoma, Ewing’s sarcoma, and plasmocytoma.

“Simultaneously” or“simultaneous” when referring to a method of treating or a therapeutic use means with a combination of a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, and one or more second agent(s) means administration 15 of the compound and the one or more second agent(s) by the same route and at the same time.

“Separately” or“separate” when referring to a method of treating or a therapeutic use means with a combination of a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, and one or more second agent(s) means administration of the compound and the one or more second agent(s) by different routes and at approximately the same time. 20 By therapeutic administration“over a period of time” means, when referring to a method of treating or a therapeutic use with a combination of a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, and one or more second agent(s), administration of the compound and the one or more second agent(s) by the same or different routes and at different times. In some embodiments, the administration of the compound or the one or more second 25 agent(s) occurs before the administration of the other begins. In this way, it is possible to administer a one of the active ingredients (i.e., a compound of the Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or one or more second agent(s)) for several months before administering the other active ingredient or ingredients. In this case, no simultaneous administration occurs. Another therapeutic administration over a period of time consists of the administration over time of 30 the two or more active ingredients of the combination using different frequencies of administration for each of the active ingredients, whereby at certain time points in time simultaneous administration of all of the active ingredients takes place whereas at other time points in time only a part of the active ingredients of the combination may be administered (e.g., for example. a compound of formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, and the one or more second 35 agents the therapeutic administration over a period of time could be such that a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, is administered once a day and the one or more second agent(s) is administered once every four weeks.) “IKZF2-dependent disease or disorder” means any disease or disorder which is directly or indirectly affected by the modulation of IKZF2 protein levels.

“IKZF4-dependent disease or disorder” means any disease or disorder which is directly or indirectly affected by the modulation of IKZF4 protein levels.

5 D. Specific Embodiments and Methods for Testing Compounds of Formula (I)

The present disclosure relates to compounds or pharmaceutically acceptable salts, hydrates, solvates, prodrugs, stereoisomers, or tautomers thereof, capable of modulating IKZF2 protein levels, which are useful for the treatment of diseases and disorders associated with modulation of IKZF2 protein levels. The disclosure further relates to compounds, or pharmaceutically acceptable salts, hydrates, solvates, 10 prodrugs, stereoisomers, or tautomers thereof, which are useful for reducing or decreasing IKZF2 protein levels.

In one embodiment, the compounds of Formula (I) have the structure of Formula (Ia):

or pharmaceutically acceptable salts, hydrates, solvates, prodrugs, stereoisomers, and tautomers 15 thereof.

In another embodiment, the compounds of Formula (I) have the structure of Formula (Ib):

or pharmaceutically acceptable salts, hydrates, solvates, prodrugs, stereoisomers, and tautomers thereof.

20 In another embodiment, the compounds of Formula (I) have the structure of Formula (Ic):

or pharmaceutically acceptable salts, hydrates, solvates, prodrugs, stereoisomers, and tautomers thereof.

In another embodiment, the compounds of Formula (I) have the structure of Formula (Id):

or pharmaceutically acceptable salts, hydrates, solvates, prodrugs, stereoisomers, and tautomers thereof.

In another embodiment, the compounds of Formula (I) have the structure of Formula (Ie):

5

or pharmaceutically acceptable salts, hydrates, solvates, prodrugs, stereoisomers, and tautomers thereof.

In another embodiment, the compounds of Formula (I) have the structure of Formula (If):

10 or pharmaceutically acceptable salts, hydrates, solvates, prodrugs, stereoisomers, and tautomers thereof.

In another embodiment, the compounds of Formula (I) have the structure of Formula (Ig):

or pharmaceutically acceptable salts, hydrates, solvates, prodrugs, stereoisomers, and tautomers 15 thereof.

In another embodiment, the compounds of Formula (I) have the structure of Formula (Ih):

or pharmaceutically acceptable salts, hydrates, solvates, prodrugs, stereoisomers, and tautomers thereof.

In another embodiment, the compounds of Formula (I) have the structure of Formula (Ii):

5 or pharmaceutically acceptable salts, hydrates, solvates, prodrugs, stereoisomers, and tautomers thereof.

In another embodiment, the compounds of Formula (I) have the structure of Formula (Ij):

or pharmaceutically acceptable salts, hydrates, solvates, prodrugs, stereoisomers, and tautomers 10 thereof.

In another embodiment, the compounds of Formula (I) have the structure of Formula (Ik):

or pharmaceutically acceptable salts, hydrates, solvates, prodrugs, stereoisomers, and tautomers thereof.

15 In another embodiment, the compounds of Formula (I) have the structure of Formula (Il):

or pharmaceutically acceptable salts, hydrates, solvates, prodrugs, stereoisomers, and tautomers thereof.

In some embodiments of the formulae above (e.g., Formula (I), Formula (Ia), Formula (Ib) Formula (Ic), or Formula (Id) Formula (Ie), Formula (If), Formula (Ig), or Formula (Ih) Formula (Ii), 5 Formula (Ij), Formula (Ik), and/or Formula (Il)), wherein:

R ₂ is (C ₁ -C ₆ )alkyl, (C ₆ -C ₁₀ )aryl, 5- or 6-membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, (C ₃ -C ₈ )cycloalkyl, or 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the alkyl is optionally substituted with one to four R ₄ ; and the aryl, heteroaryl, cycloalkyl, and heterocycloalkyl are optionally substituted with one to four R ₅ , or 10 R ₁ and R ₂ , when on adjacent atoms, together with the atoms to which they are attached form a 5- or 6- membered heterocycloalkyl ring;

each R ₄ is independently selected from -C(O)OR ₆ , -C(O)NR ₆ R _6' , -NR ₆ C(O)R _6' , halogen, -OH, - NH ₂ , CN, (C ₆ -C ₁₀ )aryl, 5- or 6-membered heteroaryl comprising 1 to 4 heteroatoms selected from O, N, and S, (C ₃ -C ₈ )cycloalkyl, and 4- to 7-membered heterocycloalkyl ring comprising 1 to 3 heteroatoms 15 selected from O, N, and S, wherein the aryl, heteroaryl, cycloalkyl, and heterocycloalkyl groups are optionally substituted with one to four R ₇ ;

each R ₅ is independently selected from (C ₁ -C ₆ )alkyl, (C ₂ -C ₆ )alkenyl, (C ₂ -C ₆ )alkynyl, (C ₁ - C ₆ )alkoxy, (C ₁ -C ₆ )haloalkyl, (C ₁ -C ₆ )haloalkoxy, (C ₁ -C ₆ )hydroxyalkyl, halogen, -OH, -NH ₂ , CN, (C ₃ - C ₇ )cycloalkyl, 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and 20 S, (C ₆ -C ₁₀ )aryl, and 5- or 6-membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, or

two R ₅ , when on adjacent atoms, together with the atoms to which they are attached form a (C ₆ - C ₁₀ )aryl ring or a 5- or 6-membered heteroaryl ring comprising 1 to 3 heteroatoms selected from O, N, and S, optionally substituted with one to four R ₁₀ , or

25 two R ₅ , when on adjacent atoms, together with the atoms to which they are attached form a (C ₅ - C ₇ )cycloalkyl ring or a 5- to 7-membered heterocycloalkyl ring comprising 1 to 3 heteroatoms selected from O, N, and S optionally substituted with one to four R ₁₀ ;

each R ₇ is independently selected from (C ₁ -C ₆ )alkyl, (C ₂ -C ₆ )alkenyl, (C ₂ -C ₆ )alkynyl, (C ₁ - C ₆ )alkoxy, (C ₁ -C ₆ )haloalkyl, (C ₁ -C ₆ )haloalkoxy, -C(O)R ₈ , -(CH ₂ ) _0-3 C(O)OR ₈ , -C(O)NR ₈ R ₉ , -NR ₈ C(O)R ₉ ,30 -NR ₈ C(O)OR ₉ , -S(O) _p NR ₈ R ₉ , -S(O) _p R ₁₂ , (C ₁ -C ₆ )hydroxyalkyl, halogen, -OH, -O(CH ₂ ) _1-3 CN, -NH ₂ , CN, - O(CH ₂ ) _0-3 (C ₆ -C ₁₀ )aryl, adamantyl, -O(CH ₂ ) _0-3 -5- or 6-membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, (C ₆ -C ₁₀ )aryl, monocyclic or bicyclic 5- to 10-membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, (C ₃ -C ₇ )cycloalkyl, and 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the alkyl is optionally substituted with 35 one to four R ₁₁ , and the aryl, heteroaryl, and heterocycloalkyl are optionally substituted with one to four substituents each independently selected from halogen, (C ₁ -C ₆ )alkyl, (C ₁ -C ₆ )haloalkyl, and (C ₁ - C ₆ )alkoxy, or two R ₇ together with the carbon atom to which they are attached form a =(O), or two R ₇ , when on adjacent atoms, together with the atoms to which they are attached form a (C ₆ - C10)aryl ring or a 5- or 6-membered heteroaryl ring comprising 1 to 3 heteroatoms selected from O, N, and S, optionally substituted with one to four R ₁₀ , or

5 two R ₇ together with the atoms to which they are attached form a (C ₅ -C ₇ ) cycloalkyl ring or a 5- to 7-membered heterocycloalkyl ring comprising 1 to 3 heteroatoms selected from O, N, and S, optionally substituted with one to four R ₁₀ ;

each R ₁₁ is independently selected from CN, (C ₁ -C ₆ )alkoxy, (C ₆ -C ₁₀ )aryl, and 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the aryl and 10 heterocycloalkyl are optionally substituted with one to four substituents each independently selected from (C ₁ -C ₆ )alkyl, (C ₁ -C ₆ )alkoxy, (C ₁ -C ₆ )haloalkyl, (C ₁ -C ₆ )haloalkoxy, (C ₁ -C ₆ )hydroxyalkyl, halogen, -OH, - NH ₂ , and CN;

or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof.

15 In some embodiments of the formulae above, R _x is D. In another embodiment, R _x is H.

In some embodiments of the formulae above, X ₁ is CR ₃ .

In some embodiments of the formulae above, X ₂ is N and X ₃ is CR ₁₄ . In another embodiment, X ₂ is CR ₁₃ and X ₃ is N. In another embodiment, X ₂ is CR ₁₅ and X ₃ is CR ₁₄ . In another embodiment, X ₂ is CR ₁₃ and X ₃ is CR ₁₆ . In another embodiment, X ₂ is N and X ₃ is CH. In another embodiment, X ₂ is CH and X ₃ is 20 N. In another embodiment, X ₂ is CH and X ₃ is CR ₁₆ . In another embodiment, X ₂ is CR ₁₅ and X ₃ is CH.

In some embodiments of the formulae above, each R ₁ is independently (C ₁ -C ₆ )haloalkyl, (C ₁ - C ₆ )hydroxyalkyl, CN, or halogen. In another embodiment, each R ₁ is independently (C ₁ -C ₆ )alkyl, (C ₁ - C ₆ )haloalkyl, CN, or halogen. In yet another embodiment, each R ₁ is independently (C ₁ -C ₆ )alkyl, (C ₁ - C ₆ )hydroxyalkyl, CN, or halogen. In another embodiment, each R ₁ is independently (C ₁ -C ₆ )alkyl, (C ₁ -25 C ₆ )haloalkyl, CN, or halogen. In yet another embodiment, each R ₁ is independently (C ₁ -C ₆ )alkyl or (C ₁ - C ₆ )haloalkyl.

In another embodiment, each R ₁ is independently (C ₁ -C ₆ )haloalkyl, (C ₁ -C ₆ )hydroxyalkyl, or halogen. In another embodiment, each R ₁ is independently (C ₁ -C ₆ )alkyl, (C ₁ -C ₆ )haloalkyl, or halogen. In yet another embodiment, each R ₁ is independently (C ₁ -C ₆ )alkyl, (C ₁ -C ₆ )hydroxyalkyl, or halogen. In 30 another embodiment, each R1 is independently (C ₁ -C ₆ )alkyl, (C ₁ -C ₆ )haloalkyl, or halogen. In yet another embodiment, each R ₁ is independently (C ₁ -C ₆ )alkyl or (C ₁ -C ₆ )haloalkyl. In another embodiment, each R ₁ is independently (C ₁ -C ₆ )alkyl or halogen. In yet another embodiment, each R ₁ is independently (C ₁ - C ₆ )haloalkyl or halogen. In another embodiment, each R ₁ is independently D or (C ₁ -C ₆ )alkyl. In another embodiment, each R ₁ is independently (C ₁ -C ₆ )alkyl.

35 In some embodiments of the formulae above, two R ₁ together with the carbon atoms to which they are attached form a (C ₃ -C ₇ )cycloalkyl or a 4- to 6- membered heterocycloalkyl ring comprising 1 to 3 heteroatoms selected from O, N, and S. In another embodiment, two R ₁ together with the carbon atoms to which they are attached form a (C ₃ -C ₇ )cycloalkyl or a 5- or 6- membered heterocycloalkyl ring comprising 1 to 3 heteroatoms selected from O, N, and S. In yet another embodiment, two R ₁ together with the carbon atoms to which they are attached form a (C3-C7)cycloalkyl or a 4- or 5- membered heterocycloalkyl ring comprising 1 to 3 heteroatoms selected from O, N, and S. In another embodiment, two R ₁ together with the 5 carbon atoms to which they are attached form a (C ₄ -C ₇ )cycloalkyl or a 4- to 6- membered heterocycloalkyl ring comprising 1 to 3 heteroatoms selected from O, N, and S. In yet another embodiment, two R ₁ together with the carbon atoms to which they are attached form a (C ₄ -C ₆ )cycloalkyl or a 4- to 6- membered heterocycloalkyl ring comprising 1 to 3 heteroatoms selected from O, N, and S.

In another embodiment, two R ₁ together with the carbon atoms to which they are attached form a 10 (C3-C7)cycloalkyl. In yet another embodiment, two R1 together with the carbon atoms to which they are attached form a (C ₃ -C ₆ )cycloalkyl. In another embodiment, two R ₁ together with the carbon atoms to which they are attached form a (C ₄ -C ₇ )cycloalkyl. In yet another embodiment, two R ₁ together with the carbon atoms to which they are attached form a (C ₅ -C ₇ )cycloalkyl. In another embodiment, two R ₁ together with the carbon atoms to which they are attached form a (C ₆ -C ₇ )cycloalkyl. In yet another embodiment, two R ₁ 15 together with the carbon atoms to which they are attached form a (C ₅ -C ₆ )cycloalkyl. In another embodiment, two R ₁ together with the carbon atoms to which they are attached form a (C ₄ -C ₆ )cycloalkyl. In yet another embodiment, two R ₁ together with the carbon atoms to which they are attached form a (C ₃ -C ₆ )cycloalkyl. In another embodiment, two R ₁ together with the carbon atoms to which they are attached form a (C ₃ - C ₅ )cycloalkyl. In yet another embodiment, two R ₁ together with the carbon atoms to which they are attached 20 form a 4- to 6- membered heterocycloalkyl ring comprising 1 to 3 heteroatoms selected from O, N, and S.

In another embodiment, two R ₁ together with the carbon atoms to which they are attached form a 5- or 6- membered heterocycloalkyl ring comprising 1 to 3 heteroatoms selected from O, N, and S. In yet another embodiment, two R ₁ together with the carbon atoms to which they are attached form a 4- or 5- membered heterocycloalkyl ring comprising 1 to 3 heteroatoms selected from O, N, and S.

25 In some embodiments of the formulae above, two R ₁ , when on adjacent atoms, together with the atoms to which they are attached form a phenyl ring or a 5- or 6-membered heteroaryl ring comprising 1 to 3 heteroatoms selected from O, N, and S. In another embodiment, two R ₁ , when on adjacent atoms, together with the atoms to which they are attached form a phenyl ring. In another embodiment, two R ₁ , when on adjacent atoms, together with the atoms to which they are attached form a phenyl ring. In yet another 30 embodiment, two R1, when on adjacent atoms, together with the atoms to which they are attached form a 5- or 6-membered heteroaryl ring comprising 1 to 3 heteroatoms selected from O, N, and S. In another embodiment, two R ₁ , when on adjacent atoms, together with the atoms to which they are attached form a 5-membered heteroaryl ring comprising 1 to 3 heteroatoms selected from O, N, and S. In yet another embodiment, two R ₁ , when on adjacent atoms, together with the atoms to which they are attached form a 35 6-membered heteroaryl ring comprising 1 to 3 heteroatoms selected from O, N, and S.

In some embodiments of the formulae above, R ₂ is (C ₁ -C ₆ )alkyl, (C ₆ -C ₁₀ )aryl, 5- or 6-membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, (C ₃ -C ₈ )cycloalkyl, or 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the alkyl is optionally substituted with one to four R ₄ ; and the aryl, heteroaryl, cycloalkyl, and heterocycloalkyl are optionally substituted with one to four R5. In another embodiment, R ₂ is (C ₁ -C ₄ )alkyl, (C6-C10)aryl, ( (C ₃ -C) ₈ cycloalkyl, or 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein 5 the alkyl is optionally substituted with one to three R ₄ ; and wherein the aryl, cycloalkyl, and heterocycloalkyl are optionally substituted with one to three R ₅ . In another embodiment, R ₂ is (C ₁ -C ₄ )alkyl, 5- or 6-membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, (C ₃ -C ₈ )cycloalkyl, or 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the alkyl is optionally substituted with one to three R ₄ ; and wherein the heteroaryl, cycloalkyl, and 10 heterocycloalkyl are optionally substituted with one to three R5. In another embodiment, R ₂ is (C ₁ -C ₄ )alkyl, (C ₆ -C ₁₀ )aryl, 5- or 6-membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, or (C ₃ - C ₈ )cycloalkyl, wherein the alkyl is optionally substituted with one to three R ₄ ; and wherein the aryl, heteroaryl, and cycloalkyl, are optionally substituted with one to three R ₅ . In another embodiment, R ₂ is (C ₁ -C ₄ )alkyl, (C ₆ -C ₁₀ )aryl, 5- or 6-membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, 15 and S, or 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the alkyl is optionally substituted with one to three R ₄ ; and wherein the aryl, heteroaryl, and heterocycloalkyl are optionally substituted with one to three R ₅ .

In another embodiment, R ₂ is (C ₆ -C ₁₀ )aryl, 5- or 6-membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, (C ₃ -C ₈ )cycloalkyl, or 5- to 7-membered heterocycloalkyl 20 comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the aryl, heteroaryl, cycloalkyl, and heterocycloalkyl are optionally substituted with one to three R ₅ . In another embodiment, R ₂ is (C ₆ -C ₁₀ )aryl, (C ₃ -C ₈ )cycloalkyl, or 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the aryl, cycloalkyl, and heterocycloalkyl are optionally substituted with one to three R ₅ . In yet another embodiment, R ₂ is phenyl, (C ₃ -C ₈ )cycloalkyl, or 5- to 7-membered heterocycloalkyl 25 comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the phenyl, cycloalkyl, and heterocycloalkyl are optionally substituted with one to three R ₅ . In another embodiment, R ₂ is (C ₁ -C ₃ )alkyl optionally substituted with one to three R ₄ . In yet another embodiment, R ₂ is (C ₁ -C ₃ )alkyl substituted with one to three R ₄ .

In another embodiment, R ₂ is (C ₃ -C ₈ )cycloalkyl or 5- to 7-membered heterocycloalkyl comprising 30 1 to 3 heteroatoms selected from O, N, and S, wherein the cycloalkyl and heterocycloalkyl are optionally substituted with one to three R ₅ . In yet another embodiment, R ₂ is (C ₆ -C ₁₀ )aryl or 5- or 6-membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the aryl and heteroaryl are optionally substituted with one to three R ₅ . In another embodiment, R ₂ is (C ₃ -C ₈ )cycloalkyl or (C ₆ -C ₁₀ )aryl, wherein the cycloalkyl and aryl are optionally substituted with one to three R ₅ . In yet another embodiment,35 R ₂ is 5- or 6-membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, or 5- to 7- membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the heteroaryl and heterocycloalkyl are optionally substituted with one to three R ₅ . In another embodiment, R ₂ is (C ₆ -C ₁₀ )aryl optionally substituted with one to three R ₅ . In yet another embodiment, R ₂ is 5- or 6- membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, optionally substituted with one to three R5. In another embodiment, R ₂ is (C3-C8)cycloalkyl optionally substituted with one to three R5. In yet another embodiment, R ₂ is 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, optionally substituted with one to three R ₅ .

In some embodiments of the formulae above, R ₁ and R ₂ , when on adjacent atoms, together with the atoms to which they are attached form a 5-membered heterocycloalkyl ring. In another embodiment, R ₁ and R ₂ , when on adjacent atoms, together with the atoms to which they are attached form a 6-membered heterocycloalkyl ring.

In some embodiments of the formulae above, R3 is D. In another embodiment, R3 is H. In another embodiment, R ₃ is absent when s a double bond.

In some embodiments of the formulae above, each R ₄ is independently selected from -C(O)OR ₆ , - C(O)NR ₆ R _6' , -NR ₆ C(O)R _6' , halogen, -OH, -NH ₂ , CN, (C ₆ -C ₁₀ )aryl, 5- or 6-membered heteroaryl comprising 1 to 4 heteroatoms selected from O, N, and S, (C ₃ -C ₈ )cycloalkyl, and 4- to 7-membered heterocycloalkyl ring comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the aryl, heteroaryl, cycloalkyl, and heterocycloalkyl groups are optionally substituted with one to four R ₇ . In another embodiment, each R ₄ is independently selected from -C(O)OR ₆ , -C(O)NR ₆ R _6' , -NR ₆ C(O)R _6' , halogen, -OH, -NH ₂ , CN, (C ₆ -C ₁₀ )aryl, 5- or 6-membered heteroaryl comprising 1 to 4 heteroatoms selected from O, N, and S, (C ₃ -C ₈ )cycloalkyl, and 5- to 7-membered heterocycloalkyl ring comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the aryl, heteroaryl, cycloalkyl, and heterocycloalkyl groups are optionally substituted with one to four R ₇ . In another embodiment, each R ₄ is independently selected from -C(O)OR ₆ , -C(O)NR ₆ R _6' , - NR ₆ C(O)R _6' , halogen,–OH, -NH ₂ , or CN. In another embodiment, each R ₄ is independently selected from -C(O)OR ₆ , -C(O)NR ₆ R _6' , -NR ₆ C(O)R _6' , halogen, or -OH. In another embodiment, each R ₄ is independently selected from halogen, -OH, (C ₆ -C ₁₀ )aryl, 5- or 6-membered heteroaryl comprising 1 to 4 heteroatoms selected from O, N, and S, (C ₃ -C ₈ )cycloalkyl, and 5- to 7-membered heterocycloalkyl ring comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the aryl, heteroaryl, cycloalkyl, and heterocycloalkyl groups are optionally substituted with one to four R ₇ . In another embodiment, each R ₄ is independently selected from halogen, -OH, (C ₆ -C ₁₀ )aryl, 5- or 6-membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, (C ₃ -C ₈ )cycloalkyl, and 5- to 7-membered heterocycloalkyl ring comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the aryl, heteroaryl, cycloalkyl, and heterocycloalkyl groups are optionally substituted with one to four R ₇ .

In another embodiment, each R ₄ is independently selected from -C(O)OR ₆ , -C(O)NR ₆ R _6' , and - NR ₆ C(O)R _6' . In another embodiment, each R ₄ is independently selected from -C(O)OR ₆ , (C ₆ -C ₁₀ )aryl, 5- or 6-membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, (C ₃ -C ₈ )cycloalkyl, and 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the aryl, heteroaryl, cycloalkyl, and heterocycloalkyl groups are optionally substituted with one to four R ₇ . In yet another embodiment, each R ₄ is independently selected from (C ₆ -C ₁₀ )aryl, 5- or 6-membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, (C ₃ -C ₈ )cycloalkyl, and 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the aryl, heteroaryl, cycloalkyl, and heterocycloalkyl groups are optionally substituted with one to four R7. In another embodiment, each R ₄ is independently selected from (C ₆ -C ₁₀ )aryl, 5- or 6-membered heteroaryl comprising 5 1 to 3 heteroatoms selected from O, N, and S, (C ₃ -C ₈ )cycloalkyl, and 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the aryl, heteroaryl, cycloalkyl, and heterocycloalkyl groups are optionally substituted with one to three R ₇ .

In another embodiment, each R ₄ is independently selected from (C ₆ -C ₁₀ )aryl and 5- or 6-membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the aryl and heteroaryl are 10 optionally substituted with one to three R7. In yet another embodiment, each R4 is independently selected from (C ₆ -C ₁₀ )aryl and 5- or 6-membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the aryl and heteroaryl are substituted with one to three R ₇ .

In another embodiment, each R ₄ is independently selected from (C ₃ -C ₈ )cycloalkyl and 5- to 7- membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the 15 cycloalkyl and heterocycloalkyl groups are optionally substituted with one to three R ₇ . In another embodiment, each R ₄ is independently selected from (C ₃ -C ₈ )cycloalkyl and 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the cycloalkyl and heterocycloalkyl groups are substituted with one to three R ₇ .

In another embodiment, each R ₄ is independently (C ₆ -C ₁₀ )aryl optionally substituted with one to 20 three R ₇ . In yet another embodiment, each R ₄ is independently 5- or 6-membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, optionally substituted with one to three R ₇ .

In another embodiment, each R ₄ is (C ₃ -C ₈ )cycloalkyl optionally substituted with one to three R ₇ . In another embodiment, each R ₄ is independently 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, optionally substituted with one to three R ₇ .

25 In some embodiments of the formulae above, each R ₅ is independently selected from (C ₁ -C ₆ )alkyl, (C ₂ -C ₆ )alkenyl, (C ₂ -C ₆ )alkynyl, (C ₁ -C ₆ )alkoxy, (C ₁ -C ₆ )haloalkyl, (C ₁ -C ₆ )haloalkoxy, (C ₁ -C ₆ )hydroxyalkyl, halogen, -OH, -NH ₂ , CN, (C ₃ -C ₇ )cycloalkyl, 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, (C ₆ -C ₁₀ )aryl, and 5- or 6-membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S. In another embodiment, each R ₅ is independently selected from30 (C ₁ -C ₆ )alkyl, (C2-C6)alkenyl, (C2-C6)alkynyl, (C ₁ -C ₆ )alkoxy, (C ₁ -C ₆ )haloalkyl, (C ₁ -C ₆ )haloalkoxy, (C1- C ₆ )hydroxyalkyl, halogen, -OH, -NH ₂ , and CN. In yet another embodiment, each R ₅ is independently selected from (C ₃ -C ₇ )cycloalkyl, 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, (C ₆ -C ₁₀ )aryl, and 5- or 6-membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S.

35 In another embodiment, each R ₅ is independently selected from (C ₁ -C ₆ )alkyl, (C ₁ -C ₆ )alkoxy, (C ₁ - C ₆ )haloalkyl, (C ₁ -C ₆ )haloalkoxy, (C ₁ -C ₆ )hydroxyalkyl, halogen, -OH, -NH ₂ , CN, (C ₃ -C ₇ )cycloalkyl, 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, (C ₆ -C ₁₀ )aryl, and 5- or 6-membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S.

In another embodiment, each R5 is independently selected from (C ₁ -C ₆ )alkyl, (C ₁ -C ₆ )alkoxy, (C1- C ₆ )haloalkyl, and (C ₁ -C ₆ )haloalkoxy. In yet another embodiment, each R ₅ is independently selected from 5 (C ₁ -C ₆ )hydroxyalkyl, halogen, -OH, -NH ₂ , and CN. In another embodiment, each R ₅ is independently selected from (C ₁ -C ₆ )alkyl, (C ₁ -C ₆ )alkoxy, (C ₁ -C ₆ )haloalkyl, (C ₁ -C ₆ )haloalkoxy, (C ₁ -C ₆ )hydroxyalkyl, halogen, -OH, and CN.

In some embodiments of the formulae above, two R ₅ , when on adjacent atoms, together with the atoms to which they are attached form a (C ₆ -C ₁₀ )aryl ring or a 5- or 6-membered heteroaryl ring 10 comprising 1 to 3 heteroatoms selected from O, N, and S, optionally substituted with one to four R10, or two R ₅ , when on adjacent atoms, together with the atoms to which they are attached form a (C ₅ - C ₇ )cycloalkyl ring or a 5- to 7-membered heterocycloalkyl ring comprising 1 to 3 heteroatoms selected from O, N, and S optionally substituted with one to four R ₁₀ . In another embodiment, two R ₅ , when on adjacent atoms, together with the atoms to which they are attached form a (C ₆ -C ₁₀ )aryl ring or a 5- or 6- 15 membered heteroaryl ring comprising 1 to 3 heteroatoms selected from O, N, and S, optionally

substituted with one to three R ₁₀ , or two R ₅ , when on adjacent atoms, together with the atoms to which they are attached form a (C ₅ -C ₇ )cycloalkyl ring or a 5- to 7-membered heterocycloalkyl ring comprising 1 to 3 heteroatoms selected from O, N, and S optionally substituted with one three R ₁₀ .

In another embodiment, two R ₅ , when on adjacent atoms, together with the atoms to which they 20 are attached form a (C ₆ -C ₁₀ )aryl ring or a 5- or 6-membered heteroaryl ring comprising 1 to 3 heteroatoms selected from O, N, and S, optionally substituted with one to three R ₁₀ . In yet another embodiment, two R ₅ , when on adjacent atoms, together with the atoms to which they are attached form a (C ₅ -C ₇ )cycloalkyl ring or a 5- to 7-membered heterocycloalkyl ring comprising 1 to 3 heteroatoms selected from O, N, and S optionally substituted with one three R ₁₀ .

25 In another embodiment, two R ₅ , when on adjacent atoms, together with the atoms to which they are attached form a (C ₆ -C ₁₀ )aryl ring optionally substituted with one to three R ₁₀ . In another embodiment, two R ₅ , when on adjacent atoms, together with the atoms to which they are attached form a phenyl ring optionally substituted with one to three R ₁₀ . In yet another embodiment, two R ₅ , when on adjacent atoms, together with the atoms to which they are attached form a 5- or 6-membered heteroaryl ring comprising 1 30 to 3 heteroatoms selected from O, N, and S, optionally substituted with one to three R10.

In another embodiment, two R ₅ , when on adjacent atoms, together with the atoms to which they are attached form a (C ₅ -C ₇ )cycloalkyl ring optionally substituted with one three R ₁₀ . In another embodiment, two R ₅ , when on adjacent atoms, together with the atoms to which they are attached form a (C ₆ -C ₇ )cycloalkyl ring optionally substituted with one three R ₁₀ . In another embodiment, two R ₅ , when on 35 adjacent atoms, together with the atoms to which they are attached form a (C ₅ -C ₆ )cycloalkyl ring

optionally substituted with one three R ₁₀ . In another embodiment, two R ₅ , when on adjacent atoms, together with the atoms to which they are attached form a (C ₅ )cycloalkyl ring optionally substituted with one three R ₁₀ . In another embodiment, two R ₅ , when on adjacent atoms, together with the atoms to which they are attached form a (C ₆ )cycloalkyl ring optionally substituted with one three R ₁₀ . In another embodiment, two R5, when on adjacent atoms, together with the atoms to which they are attached form a (C ₇ )cycloalkyl ring optionally substituted with one three R ₁₀ .

5 In another embodiment, two R ₅ , when on adjacent atoms, together with the atoms to which they are attached form a 5- to 7-membered heterocycloalkyl ring comprising 1 to 3 heteroatoms selected from O, N, and S optionally substituted with one three R ₁₀ . In another embodiment, two R ₅ , when on adjacent atoms, together with the atoms to which they are attached form a 5- or 6-membered heterocycloalkyl ring comprising 1 to 3 heteroatoms selected from O, N, and S optionally substituted with one three R ₁₀ . In 10 another embodiment, two R5, when on adjacent atoms, together with the atoms to which they are attached form a 6- or 7-membered heterocycloalkyl ring comprising 1 to 3 heteroatoms selected from O, N, and S optionally substituted with one three R ₁₀ . In another embodiment, two R ₅ , when on adjacent atoms, together with the atoms to which they are attached form a 5-membered heterocycloalkyl ring comprising 1 to 3 heteroatoms selected from O, N, and S optionally substituted with one three R ₁₀ . In another 15 embodiment, two R ₅ , when on adjacent atoms, together with the atoms to which they are attached form a 6-membered heterocycloalkyl ring comprising 1 to 3 heteroatoms selected from O, N, and S optionally substituted with one three R ₁₀ . In another embodiment, two R ₅ , when on adjacent atoms, together with the atoms to which they are attached form a 7-membered heterocycloalkyl ring comprising 1 to 3 heteroatoms selected from O, N, and S optionally substituted with one three R ₁₀ .

20 In some embodiments of the formulae above, R ₆ is H or (C ₁ -C ₃ )alkyl. In another embodiment, R ₆ is H or (C ₆ -C ₁₀ )aryl. In yet another embodiment, R ₆ is (C ₁ -C ₃ )alkyl or (C ₆ -C ₁₀ )aryl. In another embodiment, R ₆ is H, methyl, ethyl, n-propyl, or isopropyl. In another embodiment, R ₆ is H, methyl or ethyl. In yet another embodiment, R ₆ is H or methyl. In another embodiment, R ₆ is H.

In some embodiments of the formulae above, R _6' is H or (C ₁ -C ₃ )alkyl. In another embodiment, R _6' 25 is H or (C ₆ -C ₁₀ )aryl. In yet another embodiment, R _6' is (C ₁ -C ₃ )alkyl or (C ₆ -C ₁₀ )aryl. In another

embodiment, R _6' is H, methyl, ethyl, n-propyl, or isopropyl. In another embodiment, R _6' is H, methyl or ethyl. In yet another embodiment, R _6' is H or methyl. In another embodiment, R _6' is H.

In some embodiments of the formulae above, each R ₇ is independently selected from (C ₁ - C ₆ )alkyl, (C ₂ -C ₆ )alkenyl, (C ₂ -C ₆ )alkynyl, (C ₁ -C ₆ )alkoxy, (C ₁ -C ₆ )haloalkyl, (C ₁ -C ₆ )haloalkoxy, -C(O)R ₈ , -30 (CH ₂ )0-3C(O)OR8, -C(O)NR8R9, -NR8C(O)R9, -NR8C(O)OR9, -S(O)pNR8R9, -S(O)pR12, (C1- C ₆ )hydroxyalkyl, halogen, -OH, -O(CH ₂ ) _1-3 CN, -NH ₂ , CN, -O(CH ₂ ) _0-3 (C ₆ -C ₁₀ )aryl, adamantyl, -O(CH ₂ ) _{0- 3} -5- or 6-membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, (C ₆ -C ₁₀ )aryl, monocyclic or bicyclic 5- to 10-membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, (C ₃ -C ₇ )cycloalkyl, and 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected 35 from O, N, and S, wherein the alkyl is optionally substituted with one to four R ₁₁ , and the aryl, heteroaryl, and heterocycloalkyl are optionally substituted with one to four substituent each independently selected from halogen, (C ₁ -C ₆ )alkyl, (C ₁ -C ₆ )haloalkyl, and (C ₁ -C ₆ )alkoxy. In another embodiment, each R ₇ is independently selected from (C ₁ -C ₆ )alkyl, (C ₂ -C ₆ )alkenyl, (C ₂ -C ₆ )alkynyl, (C ₁ -C ₆ )alkoxy, (C ₁ - C ₆ )haloalkyl, (C ₁ -C ₆ )haloalkoxy, -C(O)R ₈ , -(CH ₂ ) _0-3 C(O)OR ₈ , -C(O)NR ₈ R ₉ , -NR ₈ C(O)R ₉ , -NR ₈ C(O)OR ₉ , -S(O)pNR8R9, -S(O)pR12, (C ₁ -C ₆ )hydroxyalkyl, halogen, -OH, -O(CH ₂ )1-3CN, -NH2, CN, -O(CH ₂ )0-3(C6- C ₁₀ )aryl, -O(CH ₂ ) _0-3 -5- or 6-membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and 5 S, (C ₆ -C ₁₀ )aryl, monocyclic or bicyclic 5- to 10-membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, (C ₃ -C ₇ )cycloalkyl, and 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the alkyl is optionally substituted with one to four R ₁₁ , and the aryl, heteroaryl, and heterocycloalkyl are optionally substituted with one to four substituent each independently selected from halogen, (C ₁ -C ₆ )alkyl, (C ₁ -C ₆ )haloalkyl, and (C ₁ -C ₆ )alkoxy.

10 In another embodiment, each R7 is independently selected from (C ₁ -C ₆ )alkyl, (C ₁ -C ₆ )alkoxy, (C1- C ₆ )haloalkyl, (C ₁ -C ₆ )haloalkoxy, -C(O)R ₈ , -(CH ₂ ) _0-3 C(O)OR ₈ , -C(O)NR ₈ R ₉ , -NR ₈ C(O)R ₉ , -NR ₈ C(O)OR ₉ , -S(O) _p NR ₈ R ₉ , -S(O) _p R ₁₂ , (C ₁ -C ₆ )hydroxyalkyl, halogen, -OH, -O(CH ₂ ) _1-3 CN, -NH ₂ , CN, -O(CH ₂ ) _0-3 (C ₆ - C ₁₀ )aryl, -O(CH ₂ ) _0-3 -5- or 6-membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, (C ₆ -C ₁₀ )aryl, monocyclic or bicyclic 5- to 10-membered heteroaryl comprising 1 to 3 heteroatoms 15 selected from O, N, and S, (C ₃ -C ₇ )cycloalkyl, and 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the alkyl is optionally substituted with one to four R ₁₁ , and the aryl, heteroaryl, and heterocycloalkyl are optionally substituted with one to four substituent each independently selected from halogen, (C ₁ -C ₆ )alkyl, (C ₁ -C ₆ )haloalkyl, and (C ₁ -C ₆ )alkoxy.

In another embodiment, each R ₇ is independently selected from -(CH ₂ ) _0-3 C(O)OR ₈ , 20 -NR ₈ C(O)OR ₉ , -S(O) _p NR ₈ R ₉ , -S(O) _p R ₁₂ , (C ₁ -C ₆ )hydroxyalkyl, halogen, -OH, -O(CH ₂ ) _1-3 CN, -NH ₂ , CN, -O(CH ₂ ) _0-3 (C ₆ -C ₁₀ )aryl, -O(CH ₂ ) _0-3 -5- or 6-membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, bicyclic 9- or 10-membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the aryl and heteroaryl and heterocycloalkyl are optionally substituted with one to four substituents each independently selected from halogen, (C ₁ -C ₆ )alkyl, (C ₁ -C ₆ )haloalkyl, and (C ₁ - 25 C ₆ )alkoxy.

In another embodiment, each R ₇ is independently selected from (C ₁ -C ₆ )alkyl, (C ₂ -C ₆ )alkenyl, (C ₂ - C ₆ )alkynyl, (C ₁ -C ₆ )alkoxy, (C ₁ -C ₆ )haloalkyl, (C ₁ -C ₆ )haloalkoxy, -C(O)R ₈ , -C(O)OR ₈ , -C(O)NR ₈ R ₉ , - NR ₈ C(O)R ₉ , (C ₁ -C ₆ )hydroxyalkyl, halogen, -OH, -NH ₂ , CN, (C ₆ -C ₁₀ )aryl, 5- or 6-membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, (C ₃ -C ₇ )cycloalkyl, and 5- to 7-membered 30 heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S. In another embodiment, each R ₇ is independently selected from (C ₁ -C ₆ )alkyl, (C ₂ -C ₆ )alkenyl, (C ₂ -C ₆ )alkynyl, (C ₁ -C ₆ )alkoxy, (C ₁ - C ₆ )haloalkyl, (C ₁ -C ₆ )haloalkoxy, -C(O)R ₈ , -C(O)OR ₈ , -C(O)NR ₈ R ₉ , -NR ₈ C(O)R ₉ , (C ₁ -C ₆ )hydroxyalkyl, halogen, -OH, -NH ₂ , and CN.

In another embodiment, each R ₇ is independently selected from (C ₁ -C ₆ )alkyl, (C ₁ -C ₆ )alkoxy, (C ₁ - 35 C ₆ )haloalkyl, (C ₁ -C ₆ )haloalkoxy, -C(O)R ₈ , -C(O)OR ₈ , -C(O)NR ₈ R ₉ , -NR ₈ C(O)R ₉ , (C ₁ -C ₆ )hydroxyalkyl, halogen, -OH, -NH ₂ , and CN. In yet another embodiment, each R ₇ is independently selected from (C ₁ - C ₆ )alkyl, (C ₁ -C ₆ )alkoxy, (C ₁ -C ₆ )haloalkyl, (C ₁ -C ₆ )haloalkoxy. In another embodiment, each R ₇ is independently selected from -C(O)R ₈ , -C(O)OR ₈ , -C(O)NR ₈ R ₉ , -NR ₈ C(O)R ₉ , (C ₁ -C ₆ )hydroxyalkyl, halogen, -OH, -NH ₂ , and CN. In another embodiment, each R ₇ is independently selected from (C ₆ - C10)aryl, 5- or 6-membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, (C3- C ₇ )cycloalkyl, and 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, 5 and S.

In another embodiment, each R ₇ is independently selected from (C ₁ -C ₆ )alkyl, (C ₁ -C ₆ )alkoxy, (C ₁ - C ₆ )haloalkyl, (C ₁ -C ₆ )haloalkoxy, -C(O)R ₈ , -C(O)OR ₈ , -C(O)NR ₈ R ₉ , -NR ₈ C(O)R ₉ , (C ₁ -C ₆ )hydroxyalkyl, halogen, -OH, -NH ₂ , CN, (C ₆ -C ₁₀ )aryl, 5- or 6-membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, (C ₃ -C ₇ )cycloalkyl, and 5- to 7-membered heterocycloalkyl comprising 1 to 3 10 heteroatoms selected from O, N, and S. In yet another embodiment, each R7 is independently selected from (C ₁ -C ₆ )alkyl, (C ₁ -C ₆ )alkoxy, halogen, -OH, CN, and (C ₆ -C ₁₀ )aryl.

In some embodiments of the formulae above, two R ₇ , when on adjacent atoms, together with the atoms to which they are attached form a (C ₆ -C ₁₀ )aryl ring or a 5- or 6-membered heteroaryl ring comprising 1 to 3 heteroatoms selected from O, N, and S, optionally substituted with one to four R ₁₀ . In 15 another embodiment, two R ₇ , when on adjacent atoms, together with the atoms to which they are attached form a (C ₆ -C ₁₀ )aryl ring optionally substituted with one to four R ₁₀ . In another embodiment, two R ₇ , when on adjacent atoms, together with the atoms to which they are attached form a 5- or 6-membered heteroaryl ring comprising 1 to 3 heteroatoms selected from O, N, and S, optionally substituted with one to four R ₁₀ . In another embodiment, two R ₇ together with the atoms to which they are attached form a (C ₅ - 20 C ₇ ) cycloalkyl ring optionally substituted with one to four R ₁₀ . In another embodiment, two R ₇ together with the atoms to which they are attached form a 5- to 7-membered heterocycloalkyl ring comprising 1 to 3 heteroatoms selected from O, N, and S, optionally substituted with one to four R ₁₀ .

In another embodiment, two R ₇ , when on adjacent atoms, together with the atoms to which they are attached form a (C ₆ -C ₁₀ )aryl ring or a 5- or 6-membered heteroaryl ring comprising 1 to 3 heteroatoms 25 selected from O, N, and S, optionally substituted with one to four R ₁₀ , or two R ₇ , when on adjacent atoms, together with the atoms to which they are attached form a (C ₅ -C ₇ )cycloalkyl ring or a 5- to 7-membered heterocycloalkyl ring comprising 1 to 3 heteroatoms selected from O, N, and S, optionally substituted with one to four R ₁₀ .

In another embodiment, two R ₇ , when on adjacent atoms, together with the atoms to which they 30 are attached form a (C5-C7)cycloalkyl ring or a 5- to 7-membered heterocycloalkyl ring comprising 1 to 3 heteroatoms selected from O, N, and S, optionally substituted with one to four R ₁₀ . In another embodiment, two R ₇ , when on adjacent atoms, together with the atoms to which they are attached form a (C ₅ -C ₇ )cycloalkyl ring optionally substituted with one to four R ₁₀ .In another embodiment, two R ₇ , when on adjacent atoms, together with the atoms to which they are attached form a 5- to 7-membered

35 heterocycloalkyl ring comprising 1 to 3 heteroatoms selected from O, N, and S, optionally substituted with one to four R ₁₀ . In some embodiments of the formulae above, R ₈ is H or (C ₁ -C ₃ )alkyl. In another embodiment, R ₈ is H, methyl, ethyl, n-propyl, or isopropyl. In another embodiment, R ₈ is H, methyl or ethyl. In yet another embodiment, R8 is H or methyl. In another embodiment, R8 is H

In some embodiments of the formulae above, R ₉ is H or (C ₁ -C ₃ )alkyl. In another embodiment, R ₉ 5 is H, methyl, ethyl, n-propyl, or isopropyl. In another embodiment, R ₉ is H, methyl or ethyl. In yet another embodiment, R ₉ is H or methyl. In another embodiment, R ₉ is H.

In some embodiments of the formulae above, each R ₁₀ is independently selected from (C ₁ - C ₆ )alkyl, (C ₁ -C ₆ )alkoxy, (C ₁ -C ₆ )haloalkyl, (C ₁ -C ₆ )haloalkoxy, (C ₁ -C ₆ )hydroxyalkyl, and halogen. In another embodiment, each R ₁₀ is independently selected from -OH, -NH ₂ , and CN. In yet another10 embodiment, each R10 is independently selected from (C ₁ -C ₆ )alkyl, (C ₁ -C ₆ )alkoxy, (C ₁ -C ₆ )haloalkyl, (C1- C ₆ )haloalkoxy, and halogen. In another embodiment, each R ₁₀ is independently selected from (C ₁ - C ₆ )alkyl, (C ₁ -C ₆ )haloalkyl, and halogen. In yet another embodiment, each R ₁₀ is independently selected from (C ₁ -C ₆ )alkyl and halogen.

In some embodiments of the formulae above, two R ₁₀ together with the carbon atom to which 15 they are attached form a =(O).

In some embodiments of the formulae above, each R ₁₁ is independently selected from CN, (C ₁ - C ₆ )alkoxy, (C ₆ -C ₁₀ )aryl, and 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the aryl and heterocycloalkyl are optionally substituted with one to four substituents each independently selected from (C ₁ -C ₆ )alkyl, (C ₁ -C ₆ )alkoxy, (C ₁ -C ₆ )haloalkyl, (C ₁ - 20 C ₆ )haloalkoxy, (C ₁ -C ₆ )hydroxyalkyl, halogen, -OH, -NH ₂ , and CN. In another embodiment, each R ₁₁ is independently selected from CN, (C ₁ -C ₆ )alkoxy, (C ₆ -C ₁₀ )aryl, and 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the aryl and heterocycloalkyl are optionally substituted with one to three substituents each independently selected from (C ₁ -C ₆ )alkyl, (C ₁ - C ₆ )alkoxy, (C ₁ -C ₆ )haloalkyl, (C ₁ -C ₆ )haloalkoxy, (C ₁ -C ₆ )hydroxyalkyl, halogen, -OH, -NH ₂ , and CN. In 25 yet another embodiment, each R ₁₁ is independently selected from CN, (C ₁ -C ₆ )alkoxy, and (C ₆ -C ₁₀ )aryl, wherein the aryl is optionally substituted with one to three substituents each independently selected from (C ₁ -C ₆ )alkyl, (C ₁ -C ₆ )alkoxy, (C ₁ -C ₆ )haloalkyl, (C ₁ -C ₆ )haloalkoxy, (C ₁ -C ₆ )hydroxyalkyl, halogen, -OH, - NH ₂ , and CN.

In another embodiment, each R ₁₁ is independently selected from CN, (C ₁ -C ₆ )alkoxy, and 5- to 7- 30 membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the heterocycloalkyl is optionally substituted with one to four substituents each independently selected from (C ₁ -C ₆ )alkyl, (C ₁ -C ₆ )alkoxy, (C ₁ -C ₆ )haloalkyl, (C ₁ -C ₆ )haloalkoxy, (C ₁ -C ₆ )hydroxyalkyl, halogen, -OH, - NH ₂ , and CN. In another embodiment, each R ₁₁ is independently selected from CN and (C ₁ -C ₆ )alkoxy. In yet another embodiment, each R ₁₁ is independently selected from (C ₆ -C ₁₀ )aryl and 5- to 7-membered 35 heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the aryl and

heterocycloalkyl are optionally substituted with one to four substituents each independently selected from (C ₁ -C ₆ )alkyl, (C ₁ -C ₆ )alkoxy, (C ₁ -C ₆ )haloalkyl, (C ₁ -C ₆ )haloalkoxy, (C ₁ -C ₆ )hydroxyalkyl, halogen, -OH, - NH ₂ , and CN.

In some embodiments of the formulae above, R12 is (C ₁ -C ₆ )alkyl, (C ₁ -C ₆ )haloalkyl, (C6-C10)aryl, or 5- or 6-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S. In 5 another embodiment, R ₁₂ is (C ₁ -C ₆ )alkyl, (C ₁ -C ₆ )haloalkyl, phenyl, or 5- or 6-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S. In another embodiment, R ₁₂ is (C ₁ -C ₄ )alkyl, (C ₁ -C ₄ )haloalkyl, phenyl, or 5- or 6-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S.

In some embodiments of the formulae above, R ₁₃ is halogen, -OH, or -NH ₂ . In another 10 embodiment, R13 is H, halogen, or -NH2. In another embodiment, R13 is H, F, Cl, or -NH2. In another embodiment, R ₁₃ is H, F, Cl, -OH, or-NH ₂ . In another embodiment, R ₁₃ is H, F, or -NH ₂ . In another embodiment, R ₁₃ is F or -NH ₂ .

In some embodiments of the formulae above, R ₁₄ is (C ₁ -C ₃ )alkyl, (C ₁ -C ₃ )alkoxy, (C ₁ - C ₃ )haloalkyl, (C ₁ -C ₃ )haloalkoxy, (C ₁ -C ₃ )hydroxyalkyl, halogen, -OH, -NH ₂ , -NO ₂ , or CN. In another15 embodiment, R ₁₄ is H, (C ₁ -C ₃ )alkyl, (C ₁ -C ₃ )alkoxy, (C ₁ -C ₃ )haloalkyl, (C ₁ -C ₃ )haloalkoxy, (C ₁ - C ₃ )hydroxyalkyl, F, Cl, -OH, -NH ₂ , -NO ₂ , or CN. In yet another embodiment, R ₁₄ is H, (C ₁ -C ₃ )alkyl, (C ₁ - C ₃ )alkoxy, (C ₁ -C ₃ )haloalkyl, (C ₁ -C ₃ )hydroxyalkyl, halogen, -OH, -NH ₂ , -NO ₂ , or CN. In another embodiment, R ₁₄ is H, (C ₁ -C ₃ )alkyl, (C ₁ -C ₃ )alkoxy, (C ₁ -C ₃ )haloalkyl, (C ₁ -C ₃ )hydroxyalkyl, F, Cl, -OH, - NH ₂ , -NO ₂ , or CN. In another embodiment, R ₁₄ is (C ₁ -C ₃ )alkyl, (C ₁ -C ₃ )alkoxy, (C ₁ -C ₃ )haloalkyl, halogen,20 -OH, -NH ₂ , -NO ₂ , or CN. In yet another embodiment, R ₁₄ is (C ₁ -C ₃ )alkyl, (C ₁ -C ₃ )alkoxy, (C ₁ - C ₃ )haloalkyl, F, Cl, -OH, -NH ₂ , -NO ₂ , or CN. In another embodiment, R ₁₄ is H, (C ₁ -C ₃ )alkyl, (C ₁ - C ₃ )alkoxy, (C ₁ -C ₃ )haloalkyl, halogen, -OH, -NH ₂ , -NO ₂ , or CN. In yet another embodiment, R ₁₄ is H, (C ₁ - C ₃ )alkyl, (C ₁ -C ₃ )alkoxy, (C ₁ -C ₃ )haloalkyl, F, Cl, -OH, -NH ₂ , -NO ₂ , or CN.

In some embodiments of the formulae above, R ₁₅ is halogen, -OH, or -NH ₂ . In another 25 embodiment, R ₁₅ is F, Cl, or -NH ₂ . In another embodiment, R ₁₅ is F, Cl, -OH, or -NH ₂ . In another

embodiment, R ₁₅ is F or -NH ₂ .

In some embodiments of the formulae above, R ₁₆ is (C ₁ -C ₃ )alkyl, (C ₁ -C ₃ )alkoxy, (C ₁ - C ₃ )haloalkyl, (C ₁ -C ₃ )haloalkoxy, (C ₁ -C ₃ )hydroxyalkyl, halogen, -OH, -NH ₂ , -NO ₂ , or CN. In another embodiment, R ₁₆ is (C ₁ -C ₃ )alkyl, (C ₁ -C ₃ )alkoxy, (C ₁ -C ₃ )haloalkyl, (C ₁ -C ₃ )hydroxyalkyl, halogen, -OH, -30 NH2, -NO2, or CN. In another embodiment, R16 is H, (C1-C3)alkyl, (C1-C3)alkoxy, (C1-C3)haloalkyl, (C1- C ₃ )hydroxyalkyl, F, Cl, -OH, -NH ₂ , -NO ₂ , or CN. In another embodiment, R ₁₆ is (C ₁ -C ₃ )alkyl, (C ₁ - C ₃ )alkoxy, (C ₁ -C ₃ )haloalkyl, halogen, -OH, -NH ₂ , -NO ₂ , or CN. In yet another embodiment, R ₁₆ is (C ₁ - C ₃ )alkyl, (C ₁ -C ₃ )alkoxy, (C ₁ -C ₃ )haloalkyl, F, Cl, -OH, -NH ₂ , -NO ₂ , or CN.

In some embodiments of the formulae above, p is 0 or 1. In another embodiment, p is 1 or 2. In 35 yet another embodiment, p is 0 or 2. In another embodiment, p is 0. In yet another embodiment, p is 1. In another embodiment, p is 2. In some embodiments of the formulae above, n is 0 or 1. In another embodiment, n is 1 or 2. In yet another embodiment, n is 0 or 2. In another embodiment, n is 0. In yet another embodiment, n is 1. In another embodiment, n is 2.

In some embodiments of the formulae above, n + n1 £ 3.

5 In some embodiments of the formulae above, n1 is 1. In another embodiment, n1 is 2.

In some embodiments of the formulae above, n is 0 and n1 is 1. In another embodiment, n is 1 and n1 is 2. In another embodiment, n is 2 and n1 is 1. In another embodiment, n is 1 and n1 is 1.

In some embodiments of the formulae above, q is 0, 1, 2, or 3. In another embodiment, q is 1, 2, 3, or 4. In yet another embodiment, q is 0, 1, or 2. In another embodiment, q is 1, 2, or 3. In yet another 10 embodiment, q is 2, 3, or 4. In another embodiment, q is 0 or 1. In yet another embodiment, q is 1 or 2. In another embodiment, q is 2 or 3. In yet another embodiment, q is 3 or 4. In another embodiment, q is 0. In yet another embodiment, q is 1. In another embodiment, q is 2. In yet another embodiment, q is 3. In another embodiment, q is 4.

In some embodiments of the formulae above, X ₁ is CH and n is 1. In another embodiment, X ₁ is 15 CH, n is 1, and q is 0.

In some embodiments of the formulae above, X ₁ is CH, X ₂ is N, and n is 1. In another embodiment, X ₁ is CH, X ₂ is N, n is 1, and q is 0.

In some embodiments of the formulae above, X ₁ is CH, X ₃ is N, and n is 1. In another embodiment, X ₁ is CH, X ₃ is N, n is 1, and q is 0.

20 In some embodiments of the formulae above, X ₁ is CH, X ₂ is N, and n is 1. In another embodiment, X ₁ is CH, X ₂ is N, n is 1, and q is 0, 1, or 2.

In some embodiments of the formulae above, X ₁ is CH, X ₃ is N, and n is 1. In another embodiment, X ₁ is CH, X ₃ is N, n is 1, and q is 0, 1, or 2.

In some embodiments of the formulae above, X ₁ is CH, n is 1, and q is 0 or 1. In another 25 embodiment, X ₁ is CH, n is 1, q is 0 or 1, and R ₁ is (C ₁ -C ₆ )alkyl. In another embodiment, X ₁ is CH, n is 1, q is 0 or 1, R ₁ is (C ₁ -C ₆ )alkyl, and R ₂ is (C ₁ -C ₆ )alkyl optionally substituted with one to three R ₄ . In another embodiment, X ₁ is CH, n is 1, q is 0 or 1, R ₁ is (C ₁ -C ₆ )alkyl, and R ₂ is (C ₁ -C ₆ )alkyl substituted with one to three R ₄ .

In another embodiment, X ₁ is CH, n is 1, q is 0, and R ₂ is (C ₁ -C ₆ )alkyl optionally substituted with 30 one to three R4. In another embodiment, X1 is CH, n is 1, q is 0, and R ₂ is (C ₁ -C ₆ )alkyl substituted with one to three R ₄ .

In another embodiment, X ₁ is CH, X ₂ is N, n is 1, q is 0, and R ₂ is (C ₁ -C ₆ )alkyl optionally substituted with one to three R ₄ . In another embodiment, X ₁ is CH, n is 1, q is 0, and R ₂ is (C ₁ -C ₆ )alkyl substituted with one to three R ₄ .

35 In another embodiment, X ₁ is CH, X ₃ is N, n is 1, q is 0, and R ₂ is (C ₁ -C ₆ )alkyl optionally substituted with one to three R ₄ . In another embodiment, X ₁ is CH, n is 1, q is 0, and R ₂ is (C ₁ -C ₆ )alkyl substituted with one to three R ₄ . In another embodiment, X ₁ is CH, X ₂ is CR ₁₃ , n is 1, q is 0, and R ₂ is (C ₁ -C ₆ )alkyl optionally substituted with one to three R ₄ . In another embodiment, X ₁ is CH, n is 1, q is 0, and R ₂ is (C ₁ -C ₆ )alkyl substituted with one to three R4.

In another embodiment, X ₁ is CH, X ₃ is CR ₁₄ , n is 1, q is 0, and R ₂ is (C ₁ -C ₆ )alkyl optionally 5 substituted with one to three R ₄ . In another embodiment, X ₁ is CH, n is 1, q is 0, and R ₂ is (C ₁ -C ₆ )alkyl substituted with one to three R ₄ .

In another embodiment, X ₁ is CH, X ₂ is CR ₁₅ , n is 1, q is 0, and R ₂ is (C ₁ -C ₆ )alkyl optionally substituted with one to three R ₄ . In another embodiment, X ₁ is CH, n is 1, q is 0, and R ₂ is (C ₁ -C ₆ )alkyl substituted with one to three R ₄ .

10 In another embodiment, X1 is CH, X3 is CR16, n is 1, q is 0, and R ₂ is (C ₁ -C ₆ )alkyl optionally substituted with one to three R ₄ . In another embodiment, X ₁ is CH, n is 1, q is 0, and R ₂ is (C ₁ -C ₆ )alkyl substituted with one to three R ₄ .

In another embodiment, X ₁ is CH, X ₂ is CR ₁₃ , X ₃ is CR ₁₆ , n is 1, q is 0, and R ₂ is (C ₁ -C ₆ )alkyl optionally substituted with one to three R ₄ . In another embodiment, X ₁ is CH, n is 1, q is 0, and R ₂ is (C ₁ - 15 C ₆ )alkyl substituted with one to three R ₄ .

In another embodiment, X ₁ is CH, X ₂ is CR ₁₄ , X ₃ is CR ₁₅ , n is 1, q is 0, and R ₂ is (C ₁ -C ₆ )alkyl optionally substituted with one to three R ₄ . In another embodiment, X ₁ is CH, n is 1, q is 0, and R ₂ is (C ₁ - C ₆ )alkyl substituted with one to three R ₄ .

In some embodiments of the formulae above, X ₁ is CH, n is 1, q is 0 or 1, R ₁ is (C ₁ -C ₆ )alkyl, R ₂ is20 (C ₁ -C ₆ )alkyl optionally substituted with one to three R ₄ , and each R ₄ is independently selected from - C(O)OR ₆ , (C ₆ -C ₁₀ )aryl, 5- or 6-membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, (C ₃ -C ₈ )cycloalkyl, and 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the aryl, heteroaryl, cycloalkyl, and heterocycloalkyl groups are optionally substituted with one to three R ₇ .

25 In some embodiments of the formulae above, X ₁ is CH, n is 1, q is 0 or 1, R ₁ is (C ₁ -C ₆ )alkyl, R ₂ is (C ₁ -C ₆ )alkyl substituted with one to three R ₄ , and each R ₄ is independently selected from -C(O)OR ₆ , (C ₆ - C ₁₀ )aryl, 5- or 6-membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, (C ₃ - C ₈ )cycloalkyl, and 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the aryl, heteroaryl, cycloalkyl, and heterocycloalkyl groups are optionally substituted with 30 one to three R7.

In some embodiments of the formulae above, X ₁ is CH, n is 1, q is 0 or 1, R ₁ is (C ₁ -C ₆ )alkyl, R ₂ is (C ₁ -C ₆ )alkyl optionally substituted with one to three R ₄ , and each R ₄ is independently selected from (C ₆ - C ₁₀ )aryl, 5- or 6-membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, (C ₃ - C ₈ )cycloalkyl, and 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, 35 and S, wherein the aryl, heteroaryl, cycloalkyl, and heterocycloalkyl groups are optionally substituted with one to three R ₇ . In some embodiments of the formulae above, X ₁ is CH, n is 1, q is 0 or 1, R ₁ is (C ₁ -C ₆ )alkyl, R ₂ is (C ₁ -C ₆ )alkyl substituted with one to three R ₄ , and each R ₄ is independently selected from (C ₆ -C ₁₀ )aryl, 5- or 6-membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, (C3-C8)cycloalkyl, and 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the 5 aryl, heteroaryl, cycloalkyl, and heterocycloalkyl groups are optionally substituted with one to three R ₇ .

In some embodiments of the formulae above, X ₁ is CH, n is 1, q is 0, and R ₂ is (C ₆ -C ₁₀ )aryl, (C ₃ - C ₈ )cycloalkyl, or 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the aryl, cycloalkyl, and heterocycloalkyl are optionally substituted with one to three R ₅ . In yet another embodiment, X ₁ is CH, n is 1, q is 0, and R ₂ is (C ₆ -C ₁₀ )aryl, (C ₃ -C ₈ )cycloalkyl, or 5- to 7- 10 membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S.

In some embodiments of the formulae above, X ₁ is CH, n is 1, q is 0, and R ₂ is (C ₆ -C ₁₀ )aryl optionally substituted with one to three R ₅ . In another embodiment, X ₁ is CH, n is 1, q is 0, and R ₂ is 5- or 6-membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S optionally substituted with one to three R ₅ . In yet another embodiment, X ₁ is CH, n is 1, q is 0, and R ₂ is (C ₃ -C ₈ )cycloalkyl 15 optionally substituted with one to three R ₅ . In another embodiment, X ₁ is CH, n is 1, q is 0, and R ₂ is 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, optionally substituted with one to three R ₅ .

In some embodiments of the formulae above, X ₁ is CH, n is 1, q is 0 or 1, R ₁ is (C ₁ -C ₆ )alkyl, and R ₂ is (C ₆ -C ₁₀ )aryl, (C ₃ -C ₈ )cycloalkyl, or 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms 20 selected from O, N, and S, wherein the aryl, cycloalkyl, and heterocycloalkyl are optionally substituted with one to three R ₅ . In yet another embodiment, X ₁ is CH, n is 1, q is 0 or 1, R ₁ is (C ₁ -C ₆ )alkyl, and R ₂ is (C ₆ -C ₁₀ )aryl, (C ₃ -C ₈ )cycloalkyl, or 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S.

In some embodiments of the formulae above, X ₁ is CH, n is 1, q is 0 or 1, R ₁ is (C ₁ -C ₆ )alkyl, and 25 R ₂ is (C ₆ -C ₁₀ )aryl optionally substituted with one to three R ₅ . In another embodiment, X ₁ is CH, n is 1, q is 0, and R ₂ is 5- or 6-membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S optionally substituted with one to three R ₅ . In yet another embodiment, X ₁ is CH, n is 1, q is 0 or 1, R ₁ is (C ₁ -C ₆ )alkyl, and R ₂ is (C ₃ -C ₈ )cycloalkyl optionally substituted with one to three R ₅ . In another embodiment, X ₁ is CH, n is 1, q is 0 or 1, R ₁ is (C ₁ -C ₆ )alkyl, and R ₂ is 5- to 7-membered heterocycloalkyl comprising 1 to 3 30 heteroatoms selected from O, N, and S, optionally substituted with one to three R5.

In some embodiments of the formulae above, X ₁ is CH, n is 1, q is 0, and R ₂ is (C ₁ -C ₆ )alkyl optionally substituted with one to three R ₄ . In another embodiment X ₁ is CH, n is 1, q is 0, and R ₂ is (C ₁ - C ₆ )alkyl substituted with one to three R ₄ .

In some embodiments of the formulae above, X ₁ is CH, n is 1, q is 0, R ₂ is (C ₁ -C ₆ )alkyl optionally 35 substituted with one to three R ₄ , and each R ₄ is independently selected from -C(O)OR ₆ , (C ₆ -C ₁₀ )aryl, 5- or 6-membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, (C ₃ -C ₈ )cycloalkyl, and 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the aryl, heteroaryl, cycloalkyl, and heterocycloalkyl groups are optionally substituted with one to three R ₇ .

In some embodiments of the formulae above, X1 is CH, n is 1, q is 0, R ₂ is (C ₁ -C ₆ )alkyl substituted with one to three R ₄ , and each R ₄ is independently selected from -C(O)OR ₆ , (C ₆ -C ₁₀ )aryl, 5- or 6-membered 5 heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, (C ₃ -C ₈ )cycloalkyl, and 5- to 7- membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the aryl, heteroaryl, cycloalkyl, and heterocycloalkyl groups are optionally substituted with one to three R ₇ .

In some embodiments of the formulae above, X ₁ is CH, n is 1, q is 0, R ₂ is (C ₁ -C ₆ )alkyl optionally substituted with one to three R ₄ , and each R ₄ is independently selected from halogen, -OH, (C ₆ -C ₁₀ )aryl, 5- 10 or 6-membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, (C3-C8)cycloalkyl, and 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the aryl, heteroaryl, cycloalkyl, and heterocycloalkyl groups are optionally substituted with one to three R ₇ .

In some embodiments of the formulae above, X ₁ is CH, n is 1, q is 0, R ₂ is (C ₁ -C ₆ )alkyl substituted with one to three R ₄ , and each R ₄ is independently selected from halogen, -OH, (C ₆ -C ₁₀ )aryl, 5- or 6- 15 membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, (C ₃ -C ₈ )cycloalkyl, and 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the aryl, heteroaryl, cycloalkyl, and heterocycloalkyl groups are optionally substituted with one to three R ₇ .

In some embodiments of the formulae above, X ₁ is CH, n is 1, n1 is 1, q is 0, R ₂ is (C ₁ -C ₆ )alkyl optionally substituted with one to three R ₄ , and each R ₄ is independently selected from halogen, -OH, (C ₆ -20 C ₁₀ )aryl, 5- or 6-membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, (C ₃ - C ₈ )cycloalkyl, and 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the aryl, heteroaryl, cycloalkyl, and heterocycloalkyl groups are optionally substituted with one to three R ₇ .

In some embodiments of the formulae above, X ₁ is CH, n is 1, n1 is 1, q is 0, R ₂ is (C ₁ -C ₆ )alkyl 25 substituted with one to three R ₄ , and each R ₄ is independently selected from halogen, -OH, (C ₆ -C ₁₀ )aryl, 5- or 6-membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, (C ₃ -C ₈ )cycloalkyl, and 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the aryl, heteroaryl, cycloalkyl, and heterocycloalkyl groups are optionally substituted with one to three R ₇ . 30 In some embodiments of the formulae above, X1 is CH, n is 1, q is 0, R ₂ is (C ₁ -C ₆ )alkyl optionally substituted with one to three R ₄ , and each R ₄ is independently selected from (C ₆ -C ₁₀ )aryl, 5- or 6-membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, (C ₃ -C ₈ )cycloalkyl, and 5- to 7- membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the aryl, heteroaryl, cycloalkyl, and heterocycloalkyl groups are optionally substituted with one to three R ₇ .

35 In some embodiments of the formulae above, X ₁ is CH, n is 1, q is 0, R ₂ is (C ₁ -C ₆ )alkyl substituted with one to three R ₄ , and each R ₄ is independently selected from (C ₆ -C ₁₀ )aryl, 5- or 6-membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, (C ₃ -C ₈ )cycloalkyl, and 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the aryl, heteroaryl, cycloalkyl, and heterocycloalkyl groups are optionally substituted with one to three R ₇ .

In some embodiments of the formulae above, X1 is CH, n is 1, q is 0, R ₂ is (C ₁ -C ₆ )alkyl optionally substituted with one to three R ₄ , and each R ₄ is independently selected from halogen, -OH, phenyl, 5- or 6- 5 membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, (C ₃ -C ₈ )cycloalkyl, and 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the aryl, heteroaryl, cycloalkyl, and heterocycloalkyl groups are optionally substituted with one to three R ₇ .

In some embodiments of the formulae above, X ₁ is CH, n is 1, q is 0, R ₂ is (C ₁ -C ₆ )alkyl substituted with one to three R ₄ , and each R ₄ is independently selected from halogen, -OH, phenyl, 5- or 6-membered10 heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, (C3-C8)cycloalkyl, and 5- to 7- membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the aryl, heteroaryl, cycloalkyl, and heterocycloalkyl groups are optionally substituted with one to three R ₇ .

In some embodiments of the formulae above, X ₁ is CH, n is 1, n1 is 1, q is 0, R ₂ is (C ₁ -C ₆ )alkyl optionally substituted with one to three R ₄ , and each R ₄ is independently selected from halogen, -OH,15 phenyl, 5- or 6-membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, (C ₃ - C ₈ )cycloalkyl, and 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the aryl, heteroaryl, cycloalkyl, and heterocycloalkyl groups are optionally substituted with one to three R ₇ .

In some embodiments of the formulae above, X ₁ is CH, n is 1, n1 is 1, q is 0, R ₂ is (C ₁ -C ₆ )alkyl20 substituted with one to three R ₄ , and each R ₄ is independently selected from halogen, -OH, phenyl, 5- or 6- membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, (C ₃ -C ₈ )cycloalkyl, and 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the aryl, heteroaryl, cycloalkyl, and heterocycloalkyl groups are optionally substituted with one to three R ₇ .

In some embodiments of the formulae above, X ₁ is CH, n is 1, q is 0, R ₂ is (C ₁ -C ₆ )alkyl optionally 25 substituted with one to three R ₄ , and each R ₄ is independently selected from phenyl, 5- or 6-membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, (C ₃ -C ₈ )cycloalkyl, and 5- to 7- membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the aryl, heteroaryl, cycloalkyl, and heterocycloalkyl groups are optionally substituted with one to three R ₇ .

In some embodiments of the formulae above, X ₁ is CH, n is 1, q is 0, R ₂ is (C ₁ -C ₆ )alkyl substituted 30 with one to three R4, and each R4 is independently selected from phenyl, 5- or 6-membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, (C ₃ -C ₈ )cycloalkyl, and 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the aryl, heteroaryl, cycloalkyl, and heterocycloalkyl groups are optionally substituted with one to three R ₇ .

In some embodiments of the formulae above, X ₁ is CH, n is 1, n1 is 1, q is 0, R ₂ is (C ₁ -C ₆ )alkyl35 optionally substituted with one to three R ₄ , and each R ₄ is independently selected from phenyl, 5- or 6- membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, (C ₃ -C ₈ )cycloalkyl, and 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the aryl, heteroaryl, cycloalkyl, and heterocycloalkyl groups are optionally substituted with one to three R ₇ .

In some embodiments of the formulae above, X1 is CH, n is 1, n1 is 1, q is 0, R ₂ is (C ₁ -C ₆ )alkyl substituted with one to three R ₄ , and each R ₄ is independently selected from phenyl, 5- or 6-membered 5 heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, (C ₃ -C ₈ )cycloalkyl, and 5- to 7- membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the aryl, heteroaryl, cycloalkyl, and heterocycloalkyl groups are optionally substituted with one to three R ₇ .

In some embodiments of the formulae above, X ₁ is CH, n is 1, q is 0, R ₂ is (C ₁ -C ₆ )alkyl optionally substituted with one to three R ₄ , and each R ₄ is independently selected from phenyl and 5- or 6-membered 10 heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the aryl and heteroaryl groups are optionally substituted with one to three R ₇ .

In some embodiments of the formulae above, X ₁ is CH, n is 1, q is 0, R ₂ is (C ₁ -C ₆ )alkyl substituted with one to three R ₄ , and each R ₄ is independently selected from phenyl and 5- or 6-membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, (C ₃ -C ₈ )cycloalkyl, and 5- to 7-membered 15 heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the aryl and heteroaryl groups are optionally substituted with one to three R ₇ .

In some embodiments of the formulae above, X ₁ is CH, n is 1, n1 is 1, q is 0, R ₂ is (C ₁ -C ₆ )alkyl optionally substituted with one to three R ₄ , and each R ₄ is independently selected from phenyl and 5- or 6- membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the aryl and 20 heteroaryl groups are optionally substituted with one to three R ₇ .

In some embodiments of the formulae above, X ₁ is CH, n is 1, n1 is 1, q is 0, R ₂ is (C ₁ -C ₆ )alkyl substituted with one to three R ₄ , and each R ₄ is independently selected from phenyl and 5- or 6-membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, (C ₃ -C ₈ )cycloalkyl, and 5- to 7- membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the aryl and 25 heteroaryl groups are optionally substituted with one to three R ₇ .

In some embodiments of the formulae above, X ₁ is CH, n is 1, q is 0, R ₂ is (C ₁ -C ₆ )alkyl optionally substituted with one to three R ₄ , and each R ₄ is phenyl optionally substituted with one to three R ₇ .

In some embodiments of the formulae above, X ₁ is CH, n is 1, q is 0, R ₂ is (C ₁ -C ₆ )alkyl substituted with one to three R ₄ , and each R ₄ is phenyl optionally substituted with one to three R ₇ .

30 In some embodiments of the formulae above, X1 is CH, n is 1, n1 is 1, q is 0, R ₂ is (C ₁ -C ₆ )alkyl optionally substituted with one to three R ₄ , and each R ₄ is phenyl optionally substituted with one to three R ₇ .

In some embodiments of the formulae above, X ₁ is CH, n is 1, n1 is 1, q is 0, R ₂ is (C ₁ -C ₆ )alkyl substituted with one to three R ₄ , and each R ₄ is phenyl optionally substituted with one to three R ₇ .

35 In some embodiments of the formulae above, X ₁ is CH and n is 2. In another embodiment, X ₁ is CH, n is 2, and q is 0. In yet another embodiment, X ₁ is CH, n is 2, and q is 0 or 1. In another embodiment, X ₁ is CH, n is 2, q is 0 or 1, and R ₁ is (C ₁ -C ₆ )alkyl. In some embodiments of the formulae above, X ₁ is CH, n is 2, q is 0 or 1, R ₁ is (C ₁ -C ₆ )alkyl, and R ₂ is (C ₁ -C ₆ )alkyl optionally substituted with one to three R ₄ . In another embodiment, X ₁ is CH, n is 2, q is 0 or 1, R1 is (C ₁ -C ₆ )alkyl, and R ₂ is (C ₁ -C ₆ )alkyl substituted with one to three R4.

In some embodiments of the formulae above, X ₁ is CH, n is 2, q is 0, and R ₂ is (C ₁ -C ₆ )alkyl 5 optionally substituted with one to three R ₄ . In another embodiment, X ₁ is CH, n is 2, q is 0, and R ₂ is (C ₁ - C ₆ )alkyl substituted with one to three R ₄ .

In some embodiments of the formulae above, X ₁ is CH, n is 2, q is 0 or 1, R ₁ is (C ₁ -C ₆ )alkyl, R ₂ is (C ₁ -C ₆ )alkyl optionally substituted with one to three R ₄ , and each R ₄ is independently selected from - C(O)OR ₆ , (C ₆ -C ₁₀ )aryl, 5- or 6-membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, 10 and S, (C3-C8)cycloalkyl, and 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the aryl, heteroaryl, cycloalkyl, and heterocycloalkyl groups are optionally substituted with one to three R ₇ .

In some embodiments of the formulae above, X ₁ is CH, n is 2, q is 0 or 1, R ₁ is (C ₁ -C ₆ )alkyl, R ₂ is (C ₁ -C ₆ )alkyl substituted with one to three R ₄ , and each R ₄ is independently selected from -C(O)OR ₆ , (C ₆ -15 C ₁₀ )aryl, 5- or 6-membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, (C ₃ - C ₈ )cycloalkyl, and 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the aryl, heteroaryl, cycloalkyl, and heterocycloalkyl groups are optionally substituted with one to three R ₇ .

In some embodiments of the formulae above, X ₁ is CH, n is 2, q is 0 or 1, R ₁ is (C ₁ -C ₆ )alkyl, R ₂ is20 (C ₁ -C ₆ )alkyl optionally substituted with one to three R ₄ , and each R ₄ is independently selected from (C ₆ - C ₁₀ )aryl, 5- or 6-membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, (C ₃ - C ₈ )cycloalkyl, and 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the aryl, heteroaryl, cycloalkyl, and heterocycloalkyl groups are optionally substituted with one to three R ₇ .

25 In some embodiments of the formulae above, X ₁ is CH, n is 2, q is 0 or 1, R ₁ is (C ₁ -C ₆ )alkyl, R ₂ is (C ₁ -C ₆ )alkyl substituted with one to three R ₄ , and each R ₄ is independently selected from (C ₆ -C ₁₀ )aryl, 5- or 6-membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, (C ₃ -C ₈ )cycloalkyl, and 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the aryl, heteroaryl, cycloalkyl, and heterocycloalkyl groups are optionally substituted with one to three R ₇ .30 In some embodiments of the formulae above, X1 is CH, n is 2, q is 0, and R ₂ is (C6-C10)aryl, (C3- C ₈ )cycloalkyl, or 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the aryl, cycloalkyl, and heterocycloalkyl are optionally substituted with one to three R ₅ . In yet another embodiment, X ₁ is CH, n is 2, q is 0, and R ₂ is (C ₆ -C ₁₀ )aryl, (C ₃ -C ₈ )cycloalkyl, or 5- to 7- membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S.

35 In some embodiments of the formulae above, X ₁ is CH, n is 2, q is 0, and R ₂ is (C ₆ -C ₁₀ )aryl optionally substituted with one to three R ₅ . In another embodiment, X ₁ is CH, n is 2, q is 0, and R ₂ is 5- or 6-membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S optionally substituted with one to three R ₅ . In yet another embodiment, X ₁ is CH, n is 2, q is 0, and R ₂ is (C ₃ -C ₈ )cycloalkyl optionally substituted with one to three R ₅ . In another embodiment, X ₁ is CH, n is 2, q is 0, and R ₂ is 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, optionally substituted with one to three R ₅ .

5 In some embodiments of the formulae above, X ₁ is CH, n is 2, q is 0 or 1, R ₁ is (C ₁ -C ₆ )alkyl, and R ₂ is (C ₆ -C ₁₀ )aryl, (C ₃ -C ₈ )cycloalkyl, or 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the aryl, cycloalkyl, and heterocycloalkyl are optionally substituted with one to three R ₅ . In yet another embodiment, X ₁ is CH, n is 2, q is 0 or 1, R ₁ is (C ₁ -C ₆ )alkyl, and R ₂ is (C ₆ -C ₁₀ )aryl, (C ₃ -C ₈ )cycloalkyl, or 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms 10 selected from O, N, and S.

In some embodiments of the formulae above, X ₁ is CH, n is 2, q is 0 or 1, R ₁ is (C ₁ -C ₆ )alkyl, and R ₂ is (C ₆ -C ₁₀ )aryl optionally substituted with one to three R ₅ . In another embodiment, X ₁ is CH, n is 2, q is 0, and R ₂ is 5- or 6-membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S optionally substituted with one to three R ₅ . In yet another embodiment, X ₁ is CH, n is 2, q is 0 or 1, R ₁ is (C ₁ -C ₆ )alkyl, 15 and R ₂ is (C ₃ -C ₈ )cycloalkyl optionally substituted with one to three R ₅ . In another embodiment, X ₁ is CH, n is 2, q is 0 or 1, R ₁ is (C ₁ -C ₆ )alkyl, and R ₂ is 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, optionally substituted with one to three R ₅ .

In some embodiments of the formulae above, X ₁ is CH, n is 1, n1 is 1, and R ₂ is (C ₁ -C ₆ )alkyl optionally substituted with one to three R ₄ . In another embodiment, X ₁ is CH, n is 1, n1 is 1, and R ₂ is (C ₁ - 20 C ₆ )alkyl substituted with one to three R ₄ . In another embodiment, X ₁ is CH, n is 1, n1 is 1, q is 0, and R ₂ is (C ₁ -C ₆ )alkyl substituted with one to three R ₄ . In another embodiment, X ₁ is CH, n is 1, n1 is 1, q is 0, and R ₂ is (C ₁ -C ₆ )alkyl substituted with one to three R ₄ . In another embodiment, X ₁ is CH, X ₂ is N and X ₃ is R ₁₄ , n is 1, n1 is 1, q is 0, and R ₂ is (C ₁ -C ₆ )alkyl substituted with one to three R ₄ .

In some embodiments of the formulae above, X ₁ is CH, X ₂ is N and X ₃ is R ₁₄ , n is 1, n1 is 1, q is 0, 25 and R ₂ is (C ₁ -C ₆ )alkyl substituted with one to three R ₄ . In another embodiment, X ₁ is CH, X ₂ is CR ₁₃ and X ₃ is N is R ₁₄ , n is 1, n1 is 1, q is 0, and R ₂ is (C ₁ -C ₆ )alkyl substituted with one to three R ₄ . In another embodiment, X ₁ is CH, X ₂ is CR ₁₃ and X ₃ is N, n is 1, n1 is 1, q is 0, and R ₂ is (C ₁ -C ₆ )alkyl substituted with one to three R ₄ . In another embodiment, X ₁ is CH, X ₂ is CR ₁₅ and X ₃ is CR ₁₄ , n is 1, n1 is 1, q is 0, and R ₂ is (C ₁ -C ₆ )alkyl substituted with one to three R ₄ . In another embodiment, X ₁ is CH, X ₂ is CR ₁₅ and X ₃ is 30 CR14, n is 1, n1 is 1, q is 0, and R ₂ is (C ₁ -C ₆ )alkyl substituted with one to three R4. In another embodiment, X ₁ is CH, X ₂ is CR ₁₃ and X ₃ is CR ₁₆ , n is 1, n1 is 1, q is 0, and R ₂ is (C ₁ -C ₆ )alkyl substituted with one to three R ₄ . In another embodiment, X ₁ is CH, X ₂ is CR ₁₃ and X ₃ is CR ₁₆ , n is 1, n1 is 1, q is 0, and R ₂ is (C ₁ - C ₆ )alkyl substituted with one to three R ₄ . 5

Embodiment 1: A compound of Formula (I), wherein:

X1 is CR3;

is optionally a double bond when X ₁ is CR ₃ and R ₃ is absent;

X ₂ is N and X ₃ is CR ₁₄ ; or X ₂ is CR ₁₃ and X ₃ is N; or X ₂ is CR ₁₅ and X ₃ is CR ₁₄ ; or X ₂ is CR ₁₃ and X ₃ is 5 CR ₁₆ ;

each R ₁ is independently (C ₁ -C ₆ )alkyl, (C ₁ -C ₆ )haloalkyl, (C ₁ -C ₆ )hydroxyalkyl, CN, or halogen, or two R ₁ together with the carbon atoms to which they are attached form (C ₃ -C ₇ )cycloalkyl or a 4- to 6- membered heterocycloalkyl ring comprising 1 to 3 heteroatoms selected from O, N, and S, or two R1, when on adjacent atoms, together with the atoms to which they are attached form a (C6-C10)aryl 10 ring or a 5- or 6-membered heteroaryl ring comprising 1 to 3 heteroatoms selected from O, N, and S;

R ₂ is (C ₁ -C ₆ )alkyl, (C ₆ -C ₁₀ )aryl, 5- or 6-membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, (C ₃ -C ₈ )cycloalkyl, or 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the alkyl is optionally substituted with one or more R ₄ ; and the aryl, heteroaryl, cycloalkyl, and heterocycloalkyl are optionally substituted with one or 15 more R ₅ , or

R ₁ and R ₂ , when on adjacent atoms, together with the atoms to which they are attached form a 5- or 6- membered heterocycloalkyl ring;

R ₃ is H or R ₃ is absent when is a double bond;

each R ₄ is independently selected from -C(O)OR ₆ , -C(O)NR ₆ R _6' , -NR ₆ C(O)R _6' , halogen, -OH, -NH ₂ , CN, 20 (C ₆ -C ₁₀ )aryl, 5- or 6-membered heteroaryl comprising 1 to 4 heteroatoms selected from O, N, and S, (C ₃ -C ₈ )cycloalkyl, and 4- to 7-membered heterocycloalkyl ring comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the aryl, heteroaryl, cycloalkyl, and heterocycloalkyl groups are optionally substituted with one or more R ₇ ;

each R ₅ is independently selected from (C ₁ -C ₆ )alkyl, (C ₂ -C ₆ )alkenyl, (C ₂ -C ₆ )alkynyl, (C ₁ -C ₆ )alkoxy, 25 (C ₁ -C ₆ )haloalkyl, (C ₁ -C ₆ )haloalkoxy, (C ₁ -C ₆ )hydroxyalkyl, halogen, -OH, -NH ₂ , CN,

(C ₃ -C ₇ )cycloalkyl, 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, (C ₆ -C ₁₀ )aryl, and 5- or 6-membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, or

two R ₅ , when on adjacent atoms, together with the atoms to which they are attached form a (C ₆ -C ₁₀ )aryl 30 ring or a 5- or 6-membered heteroaryl ring comprising 1 to 3 heteroatoms selected from O, N, and S, optionally substituted with one or more R ₁₀ , or

two R ₅ , when on adjacent atoms, together with the atoms to which they are attached form a

(C ₅ -C ₇ )cycloalkyl ring or a 5- to 7-membered heterocycloalkyl ring comprising 1 to 3 heteroatoms selected from O, N, and S optionally substituted with one or more R ₁₀ ;

35 R ₆ and R _6' are each independently H, (C ₁ -C ₆ )alkyl, or (C ₆ -C ₁₀ )aryl;

each R ₇ is independently selected from (C ₁ -C ₆ )alkyl, (C ₂ -C ₆ )alkenyl, (C ₂ -C ₆ )alkynyl, (C ₁ -C ₆ )alkoxy, (C ₁ -C ₆ )haloalkyl, (C ₁ -C ₆ )haloalkoxy, -C(O)R ₈ , -(CH ₂ ) _0-3 C(O)OR ₈ , -C(O)NR ₈ R ₉ , -NR ₈ C(O)R ₉ , - NR ₈ C(O)OR ₉ , -S(O) _p NR ₈ R ₉ , -S(O) _p R ₁₂ , (C ₁ -C ₆ )hydroxyalkyl, halogen, -OH, -O(CH ₂ ) _1-3 CN, -NH ₂ , CN, -O(CH ₂ )0-3(C6-C10)aryl, adamantyl, -O(CH ₂ )0-3-5- or 6-membered heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, (C ₆ -C ₁₀ )aryl, monocyclic or bicyclic 5- to 10-membered 5 heteroaryl comprising 1 to 3 heteroatoms selected from O, N, and S, (C ₃ -C ₇ )cycloalkyl, and 5- to 7- membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the alkyl is optionally substituted with one or more R ₁₁ , and the aryl, heteroaryl, and heterocycloalkyl are optionally substituted with one or more substituents each independently selected from halogen, (C ₁ -C ₆ )alkyl, (C ₁ -C ₆ )haloalkyl, and (C ₁ -C ₆ )alkoxy, or

10 two R7 together with the carbon atom to which they are attached form a =(O), or

two R ₇ , when on adjacent atoms, together with the atoms to which they are attached form a (C ₆ -C ₁₀ )aryl ring or a 5- or 6-membered heteroaryl ring comprising 1 to 3 heteroatoms selected from O, N, and S, optionally substituted with one or more R ₁₀ , or

two R ₇ together with the atoms to which they are attached form a (C ₅ -C ₇ ) cycloalkyl ring or a 5- to 7- 15 membered heterocycloalkyl ring comprising 1 to 3 heteroatoms selected from O, N, and S, optionally substituted with one or more R ₁₀ ;

R ₈ and R ₉ are each independently H or (C ₁ -C ₆ )alkyl;

each R ₁₀ is independently selected from (C ₁ -C ₆ )alkyl, (C ₁ -C ₆ )alkoxy, (C ₁ -C ₆ )haloalkyl,

(C ₁ -C ₆ )haloalkoxy, (C ₁ -C ₆ )hydroxyalkyl, halogen, -OH, -NH ₂ , and CN, or

20 two R ₁₀ together with the carbon atom to which they are attached form a =(O);

each R ₁₁ is independently selected from CN, (C ₁ -C ₆ )alkoxy, (C ₆ -C ₁₀ )aryl, and 5- to 7-membered

heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S, wherein the aryl and heterocycloalkyl are optionally substituted with one or more substituents each independently selected from (C ₁ -C ₆ )alkyl, (C ₁ -C ₆ )alkoxy, (C ₁ -C ₆ )haloalkyl, (C ₁ -C ₆ )haloalkoxy, (C ₁ -C ₆ )hydroxyalkyl, 25 halogen, -OH, -NH ₂ , and CN;

R ₁₂ is (C ₁ -C ₆ )alkyl, (C ₁ -C ₆ )haloalkyl, (C ₆ -C ₁₀ )aryl, or 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S;

R ₁₃ is H, halogen, -OH, or -NH ₂ ;

R ₁₄ is H, (C ₁ -C ₃ )alkyl, (C ₁ -C ₃ )alkoxy, (C ₁ -C ₃ )haloalkyl, (C ₁ -C ₃ )haloalkoxy, (C ₁ -C ₃ )hydroxyalkyl, 30 halogen, -OH, -NH2, -NO2, or CN;

R ₁₅ is halogen, -OH, or -NH ₂ ;

R ₁₆ is (C ₁ -C ₃ )alkyl, (C ₁ -C ₃ )alkoxy, (C ₁ -C ₃ )haloalkyl, (C ₁ -C ₃ )haloalkoxy, (C ₁ -C ₃ )hydroxyalkyl, halogen, -OH, -NH ₂ , -NO ₂ , or CN;

R _x is H or D;

35 p is 0, 1, or 2;

n is 0, 1, or 2;

n1 is 1 or 2, wherein n + n1 £ 3; and q is 0, 1, 2, 3, or 4;

or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof.

Embodiment 2: The compound according to Embodiment 1, wherein R _x is H.

5 Embodiment 3: The compound according to Embodiment 1 or 2, wherein X ₂ is N and X ₃ is CR ₁₄ .

Embodiment 4: The compound according to Embodiment 1 or 2, wherein X ₂ is CR ₁₃ and X ₃ is N. Embodiment 5: The compound according to Embodiment 1 or 2, wherein X ₂ is CR ₁₅ , and X ₃ is CR ₁₄ .

Embodiment 6: The compound according to Embodiment 1 or 2, wherein X ₂ is CR ₁₃ , and X ₃ is 10 CR16.

Embodiment 7: The compound according to Embodiment 1, having a Formula (Ia), Formula (Ib), Formula (Ic), or Formula (Id), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof.

Embodiment 8: The compound according to any one of Embodiments 1-7, wherein s a 15 double bond, X ₁ is CR ₃ , and R ₃ is absent.

Embodiment 9: The compound according to any one of Embodiments 1-7, wherein a single bond, X ₁ is CR ₃ , and R ₃ is H.

Embodiment 10: The compound according to Embodiment 1, having a Formula (Ie), Formula (If), Formula (Ig), or Formula (Ih), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, 20 stereoisomer, or tautomer thereof.

Embodiment 11: The compound according to any one of Embodiments 1-10, wherein n is 0, 1, or 2.

Embodiment 12: The compound according to any one of Embodiments 1-11, wherein n is 1 or 2. Embodiment 13: The compound according to any one of Embodiments 1-12, wherein n is 1. 25 Embodiment 14: The compound according to Embodiment 1 having a Formula (Ii), Formula (Ij), Formula (Ik), or Formula (Il), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof.

Embodiment 15: The compound according to any one of Embodiments 1-14, wherein R ₂ is (C ₆ - C ₁₀ )aryl, (C ₃ -C ₈ )cycloalkyl, or 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected 30 from O, N, and S, wherein the aryl, heteroaryl, cycloalkyl, and heterocycloalkyl are optionally substituted with one to three R ₅ .

Embodiment 16: The compound according to any one of Embodiments 1-14, wherein R ₂ is (C ₆ - C ₁₀ )aryl, (C ₃ -C ₈ )cycloalkyl, or 5- to 7-membered heterocycloalkyl comprising 1 to 3 heteroatoms selected from O, N, and S.

35 Embodiment 17: The compound according to any one of Embodiments 1-14, wherein R ₂ is (C ₁ - C ₆ )alkyl optionally substituted with one to three R ₄ . Embodiment 18: The compound according to any one of Embodiments 1-14, wherein R ₂ is (C ₁ - C ₆ )alkyl substituted with one to three R ₄ .

Embodiment 19: The compound according to any one of Embodiments 1-18, wherein q is 0, 1, or 2.

5 Embodiment 20: The compound according to any one of Embodiments 1-19, wherein q is 0 or 1.

Embodiment 21: The compound according to any one of Embodiments 1-20, wherein q is 0. Embodiment 22: A compound selected from:

3-(2-(1-benzylpiperidin-4-yl)-5-oxo-5,7-dihydro-6H-pyrrolo[3 ,4-b]pyridin-6-yl)piperidine-2,6-dione; 3-(6-(1-benzylpiperidin-4-yl)-3-oxo-1,3-dihydro-2H-pyrrolo[3 ,4-c]pyridin-2-yl)piperidine-2,6-dione; 10 3-(5-(1-benzylpiperidin-4-yl)-4-fluoro-1-oxoisoindolin-2-yl) piperidine-2,6-dione;

3-(5-(1-benzylpiperidin-4-yl)-6-fluoro-1-oxoisoindolin-2-yl) piperidine-2,6-dione;

3-(5-(1-benzylpiperidin-4-yl)-4-methyl-1-oxoisoindolin-2-yl) piperidine-2,6-dione;

3-(4-amino-5-(1-benzylpiperidin-4-yl)-1-oxoisoindolin-2-yl)p iperidine-2,6-dione;

3-(6-amino-5-(1-benzylpiperidin-4-yl)-1-oxoisoindolin-2-yl)p iperidine-2,6-dione;

15 3-(5-(1-benzylpiperidin-4-yl)-4-chloro-1-oxoisoindolin-2-yl) piperidine-2,6-dione;

3-(5-(1-benzylpiperidin-4-yl)-6-chloro-1-oxoisoindolin-2-yl) piperidine-2,6-dione;

3-(5-(1-benzylpiperidin-4-yl)-4-hydroxy-1-oxoisoindolin-2-yl )piperidine-2,6-dione;

3-(5-(1-benzylpiperidin-4-yl)-6-hydroxy-1-oxoisoindolin-2-yl )piperidine-2,6-dione;

3-(5-(1-benzylpiperidin-4-yl)-4-methoxy-1-oxoisoindolin-2-yl )piperidine-2,6-dione;

20 5-(1-benzylpiperidin-4-yl)-2-(2,6-dioxopiperidin-3-yl)-1-oxo isoindoline-4-carbonitrile;

3-(5-(1-benzylpiperidin-4-yl)-1-oxo-4-(trifluoromethyl)isoin dolin-2-yl)piperidine-2,6-dione;

3-(5-(1-benzylpiperidin-4-yl)-4-nitro-1-oxoisoindolin-2-yl)p iperidine-2,6-dione;

3-(6-fluoro-1-oxo-5-(1-(pyridin-4-ylmethyl)piperidin-4-yl)is oindolin-2-yl)piperidine-2,6-dione;

3-(4-chloro-5-(1-(((1r,4r)-4-methoxycyclohexyl)methyl)piperi din-4-yl)-1-oxoisoindolin-2-yl)piperidine- 25 2,6-dione;

3-(4-fluoro-5-(1-(((1r,4r)-4-methoxycyclohexyl)methyl)piperi din-4-yl)-1-oxoisoindolin-2-yl)piperidine- 2,6-dione;

3-(4-hydroxy-5-(1-(((1r,4r)-4-methoxycyclohexyl)methyl)piper idin-4-yl)-1-oxoisoindolin-2- yl)piperidine-2,6-dione; and

30 3-(5-(1-benzyl-1,2,3,6-tetrahydropyridin-4-yl)-4-methoxy-1-o xoisoindolin-2-yl)piperidine-2,6-dione or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof.

Embodiment 23: A pharmaceutical composition comprising a therapeutically effective amount of a compound according to any one of Embodiments 1-22, or a pharmaceutically acceptable salt, hydrate, 35 solvate, prodrug, stereoisomer, or tautomer thereof, and a pharmaceutically acceptable carrier or

excipient. Embodiment 24: The pharmaceutical composition according to Embodiment 23 further comprising at least one additional pharmaceutical agent.

Embodiment 25: The pharmaceutical composition according to Embodiment 23 or Embodiment 24 for use in the treatment of a disease or disorder that is affected by the reduction of IKZF2 protein 5 levels.

Embodiment 26: A method of degrading IKZF2 comprising administering to the patient in need thereof a compound according to any one of Embodiments 1-22, or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof.

Embodiment 27: A method of treating a disease or disorder that is affected by the modulation of 10 IKZF2 protein levels comprising administering to the patient in need thereof a compound according to any one of Embodiments 1-22, or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof.

Embodiment 28: A method of modulating IKZF2 protein levels comprising administering to the patient in need thereof a compound according to any one of Embodiments 1-22, or a pharmaceutically 15 acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof.

Embodiment 29: A method of reducing the proliferation of a cell the method comprising, contacting the cell with a compound according to any one of Embodiments 1-22, or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, and reducing IKZF2 protein levels.

20 Embodiment 30: A method of treating cancer comprising administering to the patient in need thereof a compound according to any one of Embodiments 1-22, or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof.

Embodiment 31: The method according to Embodiment 30, wherein the cancer is selected from non-small cell lung cancer (NSCLC), melanoma, triple-negative breast cancer (TNBC), nasopharyngeal 25 cancer (NPC), microsatellite stable colorectal cancer (mssCRC), thymoma, carcinoid, acute myelogenous leukemia, and gastrointestinal stromal tumor (GIST).

Embodiment 32: The method according to Embodiment 30, wherein the cancer is a cancer for which the immune response is deficient or an immunogenic cancer.

Embodiment 33: A method for reducing IKZF2 protein levels in a subject comprising the step of 30 administering to a subject in need thereof a therapeutically effective amount of a compound according to any one of Embodiments 1-22, or a pharmaceutically acceptable salt.

Embodiment 34: The method according to any one of Embodiments 26-33, wherein administering is performed orally, parentally, subcutaneously, by injection, or by infusion.

Embodiment 35: A compound according to any one of Embodiments 1-22, or a pharmaceutically 35 acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for use in the treatment of a disease or disorder that is affected by the reduction of IKZF2 protein levels. Embodiment 36: Use of a compound according to any one of claims 1-22, or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, in the manufacture of a medicament for treating a disease or disorder that is affected by the reduction of IKZF2 protein levels.

Embodiment 37: A compound according to any one of Embodiments 1-22, or a pharmaceutically 5 acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for use in the manufacture of a medicament for treating a disease or disorder associated with the reduction of IKZF2 protein levels.

Embodiment 38: Use of a compound according to any one of Embodiments 1-22, or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, in the treatment of a disease or disorder associated with the reduction of IKZF2 protein levels.

10 Embodiment 39: The compound according to Embodiment 35 or 37 or the use according to

Embodiment 36 or 38, wherein the disease or disorder is selected from non-small cell lung cancer (NSCLC), melanoma, triple-negative breast cancer (TNBC), nasopharyngeal cancer (NPC), microsatellite stable colorectal cancer (mssCRC), thymoma, carcinoid, acute myelogenous leukemia, and

gastrointestinal stromal tumor (GIST).

15 Embodiment 40: A compound, or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, selected from:

In another embodiment of the disclosure, the compounds of the present disclosure are enantiomers. In some embodiments the compounds are the (S)-enantiomer. In other embodiments the compounds are the (R)-enantiomer. In yet other embodiments, the compounds of the present disclosure may be (+) or (-) 5 enantiomers.

It should be understood that all isomeric forms are included within the present disclosure, including mixtures thereof. If the compound contains a double bond, the substituent may be in the E or Z configuration. If the compound contains a disubstituted cycloalkyl, the cycloalkyl substituent may have a cis- or trans configuration. All tautomeric forms are also intended to be included.

10 Compounds of the disclosure, and pharmaceutically acceptable salts, hydrates, solvates, stereoisomers, and prodrugs thereof may exist in their tautomeric form (for example, as an amide or imino ether). All such tautomeric forms are contemplated herein as part of the present disclosure.

The compounds of the disclosure may contain asymmetric or chiral centers and, therefore, exist in different stereoisomeric forms. It is intended that all stereoisomeric forms of the compounds of the 15 disclosure as well as mixtures thereof, including racemic mixtures, form part of the present disclosure. In addition, the present disclosure embraces all geometric and positional isomers. For example, if a compound of the disclosure incorporates a double bond or a fused ring, both the cis- and trans-forms, as well as mixtures, are embraced within the scope of the disclosure. Each compound herein disclosed includes all the enantiomers that conform to the general structure of the compound. The compounds may be in a racemic or enantiomerically pure form, or any other form in terms of stereochemistry. The assay results may reflect the data collected for the racemic form, the enantiomerically pure form, or any other form in terms of 5 stereochemistry.

Diastereomeric mixtures can be separated into their individual diastereomers on the basis of their physical chemical differences by methods well known to those skilled in the art, such as, for example, by chromatography and/or fractional crystallization. Enantiomers can be separated by converting the enantiomeric mixture into a diastereomeric mixture by reaction with an appropriate optically active 10 compound (e.g., chiral auxiliary such as a chiral alcohol or Mosher’s acid chloride), separating the diastereomers and converting (e.g., hydrolyzing) the individual diastereomers to the corresponding pure enantiomers. Also, some of the compounds of the disclosure may be atropisomers (e.g., substituted biaryls) and are considered as part of this disclosure. Enantiomers can also be separated by use of a chiral HPLC column.

15 It is also possible that the compounds of the disclosure may exist in different tautomeric forms, and all such forms are embraced within the scope of the disclosure and chemical structures and names. Also, for example, all keto-enol and imine-enamine forms of the compounds are included in the disclosure.

All stereoisomers (for example, geometric isomers, optical isomers, and the like) of the present compounds (including those of the salts, solvates, esters, and prodrugs of the compounds as well as the 20 salts, solvates and esters of the prodrugs), such as those which may exist due to asymmetric carbons on various substituents, including enantiomeric forms (which may exist even in the absence of asymmetric carbons), rotameric forms, atropisomers, and diastereomeric forms, are contemplated within the scope of this disclosure, as are positional isomers (such as, for example, 4-pyridyl and 3-pyridyl). (For example, if a compound of Formula (I) incorporates a double bond or a fused ring, both the cis- and trans-forms, as 25 well as mixtures, are embraced within the scope of the disclosure. Also, for example, all keto-enol and imine-enamine forms of the compounds are included in the disclosure.) Individual stereoisomers of the compounds of the disclosure may, for example, be substantially free of other isomers, or is admixed, for example, as racemates or with all other, or other selected, stereoisomers.

The chiral centers of the compounds of the disclosure can have the S or R configuration as defined 30 by the IUPAC 1974 Recommendations. In certain embodiments, each asymmetric atom has at least 50% enantiomeric excess, at least 60% enantiomeric excess, at least 70% enantiomeric excess, at least 80% enantiomeric excess, at least 90% enantiomeric excess, at least 95% enantiomeric excess, or at least 99% enantiomeric excess in the (R)- or (S)- configuration. Substituents at atoms with unsaturated double bonds may, if possible, be present in cis-(Z)- or trans-(E)- form.

35 The use of the terms“salt”,“solvate”,“ester,”“prodrug”, and the like, is intended to equally apply to the salt, solvate, ester, and prodrug of enantiomers, stereoisomers, rotamers, tautomers, positional isomers, racemates, or prodrugs of the inventive compounds. The compounds of the disclosure may form salts which are also within the scope of this disclosure. Reference to a compound of the Formula herein is generally understood to include reference to salts thereof, unless otherwise indicated.

The compounds and intermediates may be isolated and used as the compound per se. Any formula 5 given herein is also intended to represent unlabeled forms as well as isotopically labeled forms of the compounds. Isotopically labeled compounds have structures depicted by the formulas given herein except that one or more atoms are replaced by an atom having a selected atomic mass or mass number. Examples of isotopes that can be incorporated into compounds of the disclosure include isotopes of hydrogen, carbon, nitrogen, oxygen, phosphorous, fluorine, and, such as ² H, ³ H, ¹¹ C, ¹³ C, ¹⁴ C, ¹⁵ N, ¹⁸ F, ³¹ P, ³² P, respectively. 10 The disclosure includes various isotopically labeled compounds as defined herein, for example those into which radioactive isotopes, such as ³ H, ¹³ C, and ¹⁴ C, are present. Such isotopically labelled compounds are useful in metabolic studies (with ¹⁴ C), reaction kinetic studies (with, for example ² H or ³ H), detection or imaging techniques, such as positron emission tomography (PET) or single-photon emission computed tomography (SPECT) including drug or substrate tissue distribution assays, or in radioactive treatment of 15 patients. In particular, an ¹⁸ F, ¹¹ C or labeled compound may be particularly desirable for PET or SPECT studies.

Further, substitution with heavier isotopes, particularly deuterium (i.e., ² H or D) may afford certain therapeutic advantages resulting from greater metabolic stability, for example, increased in vivo half-life, reduced dosage requirements, reduced CYP450 inhibition (competitive or time dependent) or an 20 improvement in therapeutic index. For example, substitution with deuterium may modulate undesirable side effects of the undeuterated compound, such as competitive CYP450 inhibition, time dependent CYP450 inactivation, etc. It is understood that deuterium in this context is regarded as a substituent in compounds of the present disclosure. The concentration of such a heavier isotope, specifically deuterium, may be defined by the isotopic enrichment factor. The term“isotopic enrichment factor” as used herein 25 means the ratio between the isotopic abundance and the natural abundance of a specified isotope. If a substituent in a compound of this disclosure is denoted deuterium, such compound has an isotopic enrichment factor for each designated deuterium atom of at least 3500 (52.5% deuterium incorporation at each designated deuterium atom), at least 4000 (60% deuterium incorporation), at least 4500 (67.5% deuterium incorporation), at least 5000 (75% deuterium incorporation), at least 5500 (82.5% deuterium 30 incorporation), at least 6000 (90% deuterium incorporation), at least 6333.3 (95% deuterium incorporation), at least 6466.7 (97% deuterium incorporation), at least 6600 (99% deuterium incorporation), or at least 6633.3 (99.5% deuterium incorporation).

Isotopically-labeled compounds of the present disclosure can generally be prepared by conventional techniques known to those skilled in the art or by carrying out the procedures disclosed in the 35 schemes or in the examples and preparations described below using an appropriate isotopically-labeled reagent in place of the non-isotopically labeled reagent. Pharmaceutically acceptable solvates in accordance with the disclosure include those wherein the solvent of crystallization may be isotopically substituted, e.g., D ₂ O, d ₆ -acetone, d ₆ -DMSO.

The present disclosure relates to compounds which are modulators of IKZF2 protein levels. In one embodiment, the compounds of the present disclosure decrease IKZF2 protein levels. In yet one 5 embodiment, the compounds of the present disclosure reduce IKZF2 protein levels. In another embodiment, the compounds of the present disclosure are degraders of IKZF2.

The present disclosure relates to compounds, which are modulators of IKZF2 and IKZF4 protein levels. In one embodiment, the compounds of the present disclosure decrease IKZF2 and IKZF4 protein levels. In yet one embodiment, the compounds of the present disclosure reduce IKZF2 and IKZF4 protein 10 levels. In another embodiment, the compounds of the present disclosure are degraders of IKZF2.

In some embodiments, the compounds of the disclosure are selective over other proteins. As used herein“selective modulator”,“selective degrader”, or“selective compound” means, for example, a compound of the disclosure, that effectively modulates, decreases, or reduces the levels of a specific protein or degrades a specific protein to a greater extent than any other protein. A“selective modulator”,“selective 15 degrader”, or“selective compound” can be identified, for example, by comparing the ability of a compound to modulate, decrease, or reduce the levels of or to degrade a specific protein to its ability to modulate, decrease, or reduce the levels of or to degrade other proteins. In some embodiments, the selectivity can be identified by measuring the AC ₅₀ , EC ₅₀ , or IC ₅₀ of the compounds.

In some embodiments, the compounds of the present application are selective IKZF2 modulators. 20 As used herein“selective IKZF2 modulator”,“selective IKZF2 degrader”, or“selective IKZF2 compound” refers to a compound of the application, for example, that effectively modulates, decrease, or reduces the levels of IKZF2 protein or degrades IKZF2 protein to a greater extent than any other protein, particularly any protein (transcription factor) from the Ikaros protein family (e.g., IKZF1, IKZF3, IKZF4, and IKZF5).

A“selective IKZF2 modulator”,“selective IKZF2 degrader”, or“selective IKZF2 compound” can 25 be identified, for example, by comparing the ability of a compound to modulate IKZF2 protein levels to its ability to modulate levels of other members of the Ikaros protein family or other proteins. For example, a substance may be assayed for its ability to modulate IKZF2 protein levels, as well as IKZF1, IKZF3, IKZF4, IKZF5, and other proteins. In some embodiments, the selectivity can be identified by measuring the EC ₅₀ of the compounds. In some embodiments, the selectivity can be identified by measuring the AC ₅₀ of the 30 compounds. In some embodiments, a selective IKZF2 degrader is identified by comparing the ability of a compound to degrade IKZF2 to its ability to degrade other members of the Ikaros protein family or other proteins.

In certain embodiments, the compounds of the application are IKZF2 degraders that exhibit at least 2-fold, 3-fold, 5-fold, 10-fold, 25-fold, 50-fold or 100-fold selectivity for the degradation of IKZF2 over 35 other proteins (e.g., IKZF1, IKZF3, IKZF4, and IKZF5). In various embodiments, the compounds of the application exhibit up to 1000-fold selectivity for the degradation of IKZF2 over other proteins. In certain embodiments, the compounds of the application exhibit at least 2-fold, 3-fold, 5-fold, 10- fold, 25-fold, 50-fold or 100-fold selectivity for the degradation of IKZF2 over the other members of the Ikaros protein family (e.g., IKZF1, IKZF3, IKZF4, and IKZF5). In various embodiments, the compounds of the application exhibit up to 1000-fold selectivity for the degradation of IKZF2 over the other members 5 of the Ikaros protein family (e.g., IKZF1, IKZF3, IKZF4, and IKZF5).

In certain embodiments, the compounds of the application exhibit at least 2-fold, 3-fold, 5-fold, 10- fold, 25-fold, 50-fold or 100-fold selectivity for the degradation of IKZF2 over IKZF1. In various embodiments, the compounds of the application exhibit up to 1000-fold selectivity for the degradation of IKZF2 over IKZF1.

10 In certain embodiments, the compounds of the application exhibit at least 2-fold, 3-fold, 5-fold, 10- fold, 25-fold, 50-fold or 100-fold selectivity for the degradation of IKZF2 over IKZF3. In various embodiments, the compounds of the application exhibit up to 1000-fold selectivity for the degradation of IKZF2 over IKZF3.

In certain embodiments, the compounds of the application exhibit at least 2-fold, 3-fold, 5-fold, 10- 15 fold, 25-fold, 50-fold or 100-fold selectivity for the degradation of IKZF2 over IKZF4. In various embodiments, the compounds of the application exhibit up to 1000-fold selectivity for the degradation of IKZF2 over IKZF4.

In certain embodiments, the compounds of the application exhibit at least 2-fold, 3-fold, 5-fold, 10- fold, 25-fold, 50-fold or 100-fold selectivity for the degradation of IKZF2 over IKZF5. In various 20 embodiments, the compounds of the application exhibit up to 1000-fold selectivity for the degradation of IKZF2 over IKZF5.

In certain embodiments, the compounds of the application exhibit at least 2-fold, 3-fold, 5-fold, 10- fold, 25-fold, 50-fold or 100-fold selectivity for the degradation of IKZF2 and IKZF4 over the other members of the Ikaros protein family (e.g., IKZF1, IKZF3, and IKZF5). In various embodiments, the 25 compounds of the application exhibit up to 1000-fold selectivity for the degradation of IKZF2 and IKZF4 over the other members of the Ikaros protein family (e.g., IKZF1, IKZF3, and IKZF5).

In certain embodiments, the compounds of the application exhibit at least 2-fold, 3-fold, 5-fold, 10- fold, 25-fold, 50-fold or 100-fold selectivity for the degradation of IKZF2 and IKZF4 over IKZF1. In various embodiments, the compounds of the application exhibit up to 1000-fold selectivity for the 30 degradation of IKZF2 and IKZF4 over IKZF1.

In certain embodiments, the compounds of the application exhibit at least 2-fold, 3-fold, 5-fold, 10- fold, 25-fold, 50-fold or 100-fold selectivity for the degradation of IKZF2 and IKZF4 over IKZF3. In various embodiments, the compounds of the application exhibit up to 1000-fold selectivity for the degradation of IKZF2 and IKZF4 over IKZF3.

35 In certain embodiments, the compounds of the application exhibit at least 2-fold, 3-fold, 5-fold, 10- fold, 25-fold, 50-fold or 100-fold selectivity for the degradation of IKZF2 and IKZF4 over IKZF5. In various embodiments, the compounds of the application exhibit up to 1000-fold selectivity for the degradation of IKZF2 and IKZF4 over IKZF5.

In some embodiments, the degradation of IKZF2 is measured by AC50.

Potency of can be determined by AC ₅₀ value. A compound with a lower AC ₅₀ value, as determined 5 under substantially similar degradation conditions, is a more potent degrader relative to a compound with a higher AC ₅₀ value. In some embodiments, the substantially similar conditions comprise determining degradation of protein levels in cells expressing the specific protein, or a fragment of any thereof.

The disclosure is directed to compounds as described herein and pharmaceutically acceptable salts, hydrates, solvates, prodrugs, stereoisomers, or tautomers thereof, and pharmaceutical compositions 10 comprising one or more compounds as described herein, or pharmaceutically acceptable salts, hydrates, solvates, prodrugs, stereoisomers, or tautomers thereof.

E. Methods of Synthesizing Compounds of Formula (I)

The compounds of the present disclosure may be made by a variety of methods, including standard chemistry. Suitable synthetic routes are depicted in the Schemes given below.

15 The compounds of the present disclosure may be prepared by methods known in the art of organic synthesis as set forth in part by the following synthetic schemes. In the schemes described below, it is well understood that protecting groups for sensitive or reactive groups are employed where necessary in accordance with general principles or chemistry. Protecting groups are manipulated according to standard methods of organic synthesis (T.W. Greene and P.G.M. Wuts,“Protective Groups in Organic Synthesis”, 20 Third edition, Wiley, New York 1999). These groups are removed at a convenient stage of the compound synthesis using methods that are readily apparent to those skilled in the art. The selection processes, as well as the reaction conditions and order of their execution, shall be consistent with the preparation of Compounds of Formula (I).

Those skilled in the art will recognize if a stereocenter exists in the compounds of the present 25 disclosure. Accordingly, the present disclosure includes both possible stereoisomers (unless specified in the synthesis) and includes not only racemic compounds but the individual enantiomers and/or diastereomers as well. When a compound is desired as a single enantiomer or diastereomer, it may be obtained by stereospecific synthesis or by resolution of the final product or any convenient intermediate. Resolution of the final product, an intermediate, or a starting material may be affected by any suitable method known in 30 the art. See, for example,“Stereochemistry of Organic Compounds” by E.L. Eliel, S.H. Wilen, and L.N.

Mander (Wiley-Interscience, 1994).

The compounds described herein may be made from commercially available starting materials or synthesized using known organic, inorganic, and/or enzymatic processes.

Preparation of Compounds

35 The compounds of the present disclosure can be prepared in a number of ways well known to those skilled in the art of organic synthesis. By way of example, compounds of the present disclosure can be synthesized using the methods described below, together with synthetic methods known in the art of synthetic organic chemistry, or variations thereon as appreciated by those skilled in the art. Preferred methods include but are not limited to those methods described below.

Compounds of the present disclosure can be synthesized by following the steps outlined in General Schemes I, II and III which comprise different sequences of assembling intermediates 1-a, 1-b, 1-c, 1-d, 5 1-e, 1-f, 1-g, 2-a, 2-b, 2-c, 2-d, 2-e, 2-f, 3-a, 3-b, 3-c, and 3-d. Starting materials are either commercially available or made by known procedures in the reported literature or as illustrated.

General Scheme I

wherein R1, R4, R16, Rx, X2, n, n1, and q are as defined in Formula (I).

10 The general way of preparing Compounds of Formula (I) wherein X ₁ is CH, X ₃ is CR ₁₆ , R ₂ is a substituted alkyl (optionally substituted with one or more R ₄ ), and s a single bond by using intermediates 1-a, 1-b, 1-c, 1-d, 1-e, 1-f, 1-g and 2-f is outlined in General Scheme I. Alkylation of 1-a with dimethylformamide (DMF) in the presence of a base (e.g., LiTMP, LDA, TMPMgCl•LiCl etc.), in a solvent (e.g., tetrahydrofuran (THF), etc.), and optionally at low temperature provides 1-b. Reaction of 1- 15 b and 1-c in the presence of a reducing agent (e.g., sodium triacetoxyborohydride (NaB(OAc) ₃ H), sodium cyanoborohydride (NaBH3CN), etc.) and in a solvent (e.g., DMF) provides 1-d. Coupling of 1-d with iodide, bromide or tosylate 1-e using a catalyst (e.g., NiBr ₂ • (DME)), ligand (picolinamide hydrochloride salt, 4,4'- di-tert-butyl-2,2'-dipyridyl, pyridine-2,6-bis(carboximidamide) dihydrochloride, 4- methoxypicolinimidamide hydrochloride,etc.), potassium iodide (KI) and manganese or zinc powder in a 20 solvent (e.g., dimethylacetamide (DMA)) optionally at elevated temperature provides 1-f. Removal of the amine protecting group (e.g., tert-butyloxycarbonyl (Boc)) on intermediate 1-f can be accomplished using a strong acid such as trifluoroacetic acid (TFA) or hydrochloric acid (HCl) in a solvent (e.g., tetrahydrofuran (THF), 1,2-dichloroethane, dioxane or dichloromethane (DCM)) optionally at elevated temperature to provide I-g. Reductive amination of 1-g with aldehyde or ketone 2-f provides the desired compounds of Formula (I) where X ₁ is CH, X ₃ is CR ₁₆ , R ₂ is a substituted alkyl, and s a single bond.

5 General Scheme II

wherein R ₁ , R ₄ , R _x , X ₂ , X ₃ , n, n1, and q are as defined in Formula (I).

The general way of preparing Compounds of Formula (I) wherein X ₁ is CH, R ₂ is a substituted alkyl (optionally substituted with one or more R4), and s a single bond by using intermediates 1- 10 c, 1-e, 2-a, 2-b, 2-c, 2-d, 2-e, and 2-f is outlined in General Scheme II. Bromination of 2-a using a brominating agent (e.g., N-bromosuccinimide (NBS) or Bromine (Br ₂ )) and radical initiator (e.g., Azobisisobutyronitrile (AIBN)) in a solvent (e.g., 1,2-dichloroethane (DCE)) and optionally at elevated temperature yields 2-b. Cyclization with 3-aminopiperidine-2,6-dione 1-c or its HCl or CF ₃ CO ₂ H salt using a base (e.g., i-Pr ₂ NEt) in a solvent (e.g. DMF) and optionally at elevated temperature provides 2-c. Coupling 15 of 2-c with iodide, bromide or tosylate 1-e using a catalyst (e.g., NiBr ₂ •(DME)), ligand (picolinamide hydrochloride salt, 4,4'-di-tert-butyl-2,2'-dipyridyl, pyridine-2,6-bis(carboximidamide) dihydrochloride, 4- methoxypicolinimidamide hydrochloride,etc.), potassium iodide (KI) and manganese or zinc powder in a solvent (e.g., dimethylacetamide (DMA)) optionally at elevated temperature provides 2-d. Removal of the amine protecting group (e.g., tert-butyloxycarbonyl (Boc)) on intermediate 2-d can be accomplished using 20 a strong acid such as trifluoroacetic acid (TFA) or hydrochloric acid (HCl) in a solvent (e.g., tetrahydrofuran (THF), 1,2,-dichloroethane, dioxane or dichloromethane (DCM)) optionally at elevated temperature to provide 2-e. Reductive amination of 2-e with aldehyde or ketone 2-f provides a compound of Formula (I) where X ₁ is CH, R ₂ is a substituted alkyl (optionally substituted with one or more R ₄ ), and a single bond. General Scheme III

wherein R ₁ , R ₄ , R _x , X ₁ , X ₂ , X ₃ , n, n1, and q are as defined in Formula (I).

The general way of preparing Compounds of Formula (I) wherein R ₂ is a substituted alkyl 5 (optionally substituted with one or more R ₄ ), s a double bond, X ₁ is CR ₃ , and R ₃ is absent, by using intermediates 2-c, 2-f, 3-a, 3-b, 3-c, and 3-d is outlined in General Scheme III. Coupling of 2-c with boronic ester 3-a using a catalyst (e.g., Pd(dppf)Cl2•DCM), and a base (e.g., cesium carbonate (Cs2CO3)), in a solvent (e.g., N,N-dimethylformamide (DMF)) at elevated temperature yields 3-b. Removal of the amine protecting group (e.g., tert-butyloxycarbonyl (Boc)) on intermediate 3-b can be accomplished using a 10 strong acid such as trifluoroacetic acid (TFA) or hydrochloric acid (HCl) in a solvent (e.g., tetrahydrofuran (THF), 1,2,-dichloroethane, dioxane or dichloromethane (DCM)) optionally at elevated temperature to provide 3-c. Reductive amination of 3-c with aldehyde or ketone 2-f provides a compound of Formula (I) where is a double bond, X ₁ is CR ₃ , R ₃ is absent, R ₂ is a substituted alkyl. Alternatively, Compounds of Formula (I) where is a double bond, X ₁ is CR ₃ , R ₃ is absent, and R ₂ is a substituted alkyl can be 15 obtained by alkylation of 3-c with an alkyl halide 3-d in the presence of a base (e.g., NEt ₃ , Cs ₂ CO ₃ , etc.), in a solvent (e.g., DCM, DMF, etc.), and optionally at elevated temperature.

A mixture of enantiomers, diastereomers, and cis/trans isomers resulting from the process described above can be separated into their single components by chiral salt technique, chromatography using normal phase, reverse phase or chiral column, depending on the nature of the separation.

20 Any resulting racemates of compounds of the present disclosure or of intermediates can be resolved into the optical antipodes by known methods, e.g., by separation of the diastereomeric salts thereof, obtained with an optically active acid or base, and liberating the optically active acidic or basic compound. In particular, a basic moiety may thus be employed to resolve the compounds of the present disclosure into their optical antipodes, e.g., by fractional crystallization of a salt formed with an optically active acid, e.g., 25 tartaric acid, dibenzoyl tartaric acid, diacetyl tartaric acid, di-O,O'-p-toluoyl tartaric acid, mandelic acid, malic acid, or camphor-10-sulfonic acid. Racemic compounds of the present disclosure or racemic intermediates can also be resolved by chiral chromatography, e.g., high pressure liquid chromatography (HPLC) using a chiral adsorbent.

Any resulting mixtures of stereoisomers can be separated on the basis of the physicochemical differences of the constituents, into the pure or substantially pure geometric or optical isomers, 5 diastereomers, racemates, for example, by chromatography and/or fractional crystallization.

It should be understood that in the description and formula shown above, the various groups R ₁ , R ₄ , R ₁₆ , R _x , X ₁ , X ₂ , X ₃ , n, n1, and q and other variables are as defined above, except where otherwise indicated. Furthermore, for synthetic purposes, the compounds of General Schemes I, II, and III are merely representative with elected radicals to illustrate the general synthetic methodology of the Compounds of 10 Formula (I) as defined herein.

F. Methods of Using Compounds of Formula (I)

Another aspect of the disclosure relates to a method of treating, preventing, inhibiting, or eliminating a disease or disorder in a patient associated with or affected by modulation of IKZF2 protein levels. The method comprises administering to a patient in need of a treatment for diseases or disorders 15 associated with modulation of IKZF2 protein levels an effective amount of a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof.

In another aspect, the disclosure relates to a method of treating, preventing, inhibiting, or 20 eliminating a disease or disorder that is affected by the reduction of or decrease in IKZF2 protein levels.

The method comprises administering to a patient in need of a treatment for diseases or disorders affected by the reduction of IKZF2 protein levels an effective amount of a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof or a composition comprising a Compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, 25 prodrug, stereoisomer, or tautomer thereof.

Another aspect of the disclosure relates to the use of a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, in the manufacture of a medicament for the treatment, 30 prevention, inhibition or elimination of a disease or disorder that is associated with or affected by the modulation of IKZF2 protein levels.

In another aspect, the disclosure relates to the use of a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, 35 prodrug, stereoisomer, or tautomer thereof, in the manufacture of a medicament for the treatment, prevention, inhibition or elimination of a disease or disorder that is affected by the reduction of or a decrease in IKZF2 protein levels. Another aspect of the disclosure relates to a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for use in the manufacture of a medicament for treating, preventing, inhibiting, or 5 eliminating a disease or disorder that is associated with or affected by the modulation of, the reduction of, or a decrease in IKZF2 protein levels.

In another aspect, the present disclosure is directed to a method of modulating, reducing, or decreasing IKZF2 protein levels. The method involves administering to a patient in need thereof an effective amount of a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, 10 prodrug, stereoisomer, or tautomer thereof or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof. In some embodiments, IKZF2 protein levels are modulated, reduced, or decreased through degradation of the IKZF2 protein. In other embodiments, IKZF2 protein levels are modulated, reduced, or decreased through degradation of the IKZF2 protein mediated by an E3 ligase.

15 Another aspect of the present disclosure relates to a method of treating, preventing, inhibiting, or eliminating a disease or disorder in a patient associated with the reduction of or decrease in IKZF2 protein levels, the method comprising administering to a patient in need thereof an effective amount of a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, 20 hydrate, solvate, prodrug, stereoisomer, or tautomer thereof.

The present disclosure also relates to the use of a degrader of IKZF2 for the preparation of a medicament used in the treatment, prevention, inhibition or elimination of a IKZF2-dependent disease or disorder, wherein the medicament comprises a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof or a composition comprising a Compound 25 of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof.

In another aspect, the present disclosure relates to a method for treating, preventing, inhibiting, or eliminating a IKZF2-dependent disease or disorder, wherein the medicament comprises a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer 30 thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof.

In another aspect, the present disclosure relates to a method for the manufacture of a medicament for treating, preventing, inhibiting, or eliminating a IKZF2-dependent disease or disorder mediated, wherein the medicament comprises a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, 35 solvate, prodrug, stereoisomer, or tautomer thereof or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof. Another aspect of the present disclosure relates to a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for use in the manufacture of a medicament for treating a disease 5 or disorder associated with the modulation of, the reduction of, or a decrease in IKZF2 protein levels. In some embodiments, IKZF2 levels are modulated through degradation of the IKZF2 protein. In some embodiments, IKZF2 protein levels are modulated through degradation of the IKZF2 protein mediated by an E3 ligase.

Another aspect of the present disclosure relates to a compound of Formula (I), or a 10 pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for use in treating a disease associated with the modulation of, the reduction of, or a decrease in IKZF2 protein levels. In some embodiments, IKZF2 levels are modulated, reduced, or decreased through degradation of the IKZF2 protein. In some embodiments, IKZF2 protein 15 levels are modulated, reduced, or decreased through degradation of the IKZF2 protein mediated by an E3 ligase.

In another aspect, the present disclosure relates to the use of a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, 20 prodrug, stereoisomer, or tautomer thereof, in the treatment of a disease associated with the modulation of, the reduction of, or a decrease in IKZF2 protein levels. In some embodiments, IKZF2 protein levels are modulated, reduced, or decreased through degradation of the IKZF2 protein. In some embodiments, IKZF2 protein levels are modulated, reduced, or decreased through degradation of the IKZF2 protein mediated by an E3 ligase.

25 In another aspect, the present disclosure relates to a method of inhibiting IKZF2 activity through degradation of IKZF2. In some embodiments, IKZF2 protein degradation is mediated by an E3 ligase.

Another aspect of the disclosure relates to the use of a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, 30 prodrug, stereoisomer, or tautomer thereof, for inhibiting IKZF2 activity through degradation of IKZF2. In some embodiments, IKZF2 protein degradation is mediated by an E3 ligase.

In another aspect, the present disclosure relates to a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, 35 or tautomer thereof, for use in the inhibition of IKZF2 activity through degradation of IKZF2. In some embodiments, IKZF2 protein degradation is mediated by an E3 ligase. Another aspect of the disclosure relates to a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for use in the manufacture of a medicament for inhibiting IKZF2 activity through 5 degradation of IKZF2. In some embodiments, IKZF2 protein degradation is mediated by an E3 ligase.

In another aspect, the present disclosure relates to a method of inhibiting IKZF2 and IKZF4 activity through degradation of IKZF2 and IKZF4. In some embodiments, IKZF2 and IKZF4 protein degradation is mediated by an E3 ligase.

Another aspect of the disclosure relates to the use of a compound of Formula (I), or a 10 pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for inhibiting IKZF2 and IKZF4 activity through degradation of IKZF2 and IKZF4. In some embodiments, IKZF2 and IKZF4 protein degradation is mediated by an E3 ligase.

15 In another aspect, the present disclosure relates to a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for use in the inhibition of IKZF2 and IKZF4 activity through degradation of IKZF2 and IKZF4. In some embodiments, IKZF2 and IKZF4 protein degradation is mediated by an E3 ligase. 20 Another aspect of the disclosure relates to a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for use in the manufacture of a medicament for inhibiting IKZF2 and IKZF4 activity through degradation of IKZF2 and IKZF4. In some embodiments, IKZF2 and IKZF4 protein degradation 25 is mediated by an E3 ligase.

Another aspect of the disclosure relates to a method of treating, preventing, inhibiting, or eliminating a disease or disorder associated with the modulation of, the reduction of, or a decrease in IKZF2 and IKZF4 protein levels. The method comprises administering to a patient in need thereof an effective amount of a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, 30 stereoisomer, or tautomer thereof or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof.

In another aspect, the present disclosure is directed to a method of modulating, reducing, or decreasing IKZF2 and IKZF4 protein levels. The method involves administering to a patient in need thereof an effective amount of a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, 35 prodrug, stereoisomer, or tautomer thereof or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof. In some embodiments, IKZF2 and IKZF4 protein levels are modulated, reduced, or decreased through degradation of the IKZF2 and IKZF4 proteins. In other embodiments, IKZF2 and IKZF4 protein levels are modulated through degradation of the IKZF2 and IKZF4 proteins mediated by an E3 ligase.

Another aspect of the disclosure relates to a method of treating, preventing, inhibiting, or eliminating a disease or disorder associated with modulation of, reduction of, or a decrease in IKZF4 protein 5 levels. The method comprises administering to a patient in need thereof an effective amount of a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof. In some embodiments, IKZF4 protein levels are modulated, reduced, or decreased through degradation of the IKZF4 proteins. In some embodiments, 10 IKZF4 protein levels are modulated, reduced, or decreased through degradation of the IKZF4 protein mediated by an E3 ligase.

In another aspect, the present disclosure is directed to a method of modulating, reducing, or decreasing IKZF4 protein levels. The method involves administering to a patient in need thereof an effective amount of a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, 15 prodrug, stereoisomer, or tautomer thereof or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof. In some embodiments, IKZF4 protein levels are modulated, reduced, or decreased through degradation of the IKZF4 proteins. In other embodiments, IKZF4 protein levels are modulated, reduced, or decreased through degradation of the IKZF4 protein mediated by an E3 ligase.

20 Another aspect of the disclosure relates to the use of a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for treating, preventing, inhibiting, or eliminating a disease or disorder associated with modulation of, reduction of, or a decrease in IKZF4 protein levels. In some 25 embodiments, IKZF4 protein levels are modulated, reduced, or decreased through degradation of the IKZF4 proteins. In some embodiments, IKZF4 protein levels are modulated, reduced, or decreased through degradation of the IKZF4 protein mediated by an E3 ligase.

Another aspect of the disclosure relates to a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof or a composition comprising a 30 compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for use in treating, preventing, inhibiting, or eliminating a disease or disorder associated with modulation of, reduction of, or a decrease in IKZF4 protein levels. In some embodiments, IKZF4 protein levels are modulated, reduced, or decreased through degradation of the IKZF4 proteins. In some embodiments, IKZF4 protein levels are modulated, reduced, or decreased through degradation of the IKZF4 35 protein mediated by an E3 ligase.

In another aspect, the present disclosure is directed to a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for use in the manufacture of a medicament for treating, preventing, inhibiting, or eliminating a disease or disorder associated with modulation of, reduction of, or a decrease in IKZF4 protein levels. In some embodiments, IKZF4 protein levels are modulated, reduced, 5 or decreased through degradation of the IKZF4 proteins. In some embodiments, IKZF4 protein levels are modulated, reduced, or decreased through degradation of the IKZF4 protein mediated by an E3 ligase.

Another aspect of the disclosure relates to a method of treating, preventing, inhibiting, or eliminating a disease or disorder associated with a decrease in IKZF2 and IKZF4 protein levels. The method comprises administering to a patient in need of a treatment for diseases or disorders associated with a 10 decrease of IKZF2 and IKZF4 protein levels an effective amount of a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof.

The present disclosure also relates to the use of a modulator of IKZF2 and IKZF4 protein levels for 15 the preparation of a medicament used in the treatment, prevention, inhibition or elimination of a IKZF2 and IKZF4-dependent disease or disorder, wherein the medicament comprises a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof. In another aspect, the present disclosure relates to a method for20 the manufacture of a medicament for treating, preventing, inhibiting, or eliminating a IKZF2 and IKZF4- dependent disease or disorder, wherein the medicament comprises a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof.

25 Another aspect of the present disclosure relates to a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for use in the manufacture of a medicament for treating a disease associated with the modulation of, the reduction of, or a decrease in IKZF2 and IKZF4 protein levels. In 30 some embodiments, IKZF2 and IKZF4 protein levels are modulated, reduced, or decreased through degradation of the IKZF2 and IKZF4 proteins. In other embodiments, IKZF2 and IKZF4 protein levels are modulated, reduced, or decreased through degradation of the IKZF2 and IKZF4 proteins mediated by an E3 ligase.

In another aspect, the present disclosure relates to a compound of Formula (I), or a pharmaceutically 35 acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for use in treating a disease associated with the modulation of, the reduction of, or a decrease in IKZF2 and IKZF4 protein levels. In some embodiments, IKZF2 and IKZF4 protein levels are modulated, reduced, or decreased through degradation of the IKZF2 and IKZF4 proteins. In other embodiments, IKZF2 and IKZF4 protein levels are modulated, reduced, or decreased through degradation of the IKZF2 and IKZF4 proteins mediated by an E3 ligase.

5 In another aspect, the present disclosure relates to the use of a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, in the treatment of a disease associated with the modulation of, the reduction of, or a decrease in IKZF2 and IKZF4 protein levels. In some embodiments, IKZF2 and 10 IKZF4 protein levels are modulated, reduced, or decreased through degradation of the IKZF2 and IKZF4 proteins. In other embodiments, IKZF2 and IKZF4 protein levels are modulated, reduced, or decreased through degradation of the IKZF2 and IKZF4 proteins mediated by an E3 ligase.

Another aspect of the disclosure relates to a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising 15 a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for use in the treatment of an IKZF2-dependent disease or disorder by reducing or decreasing IKZF2 protein levels, wherein reduction or decrease of IKZF2 protein levels treats the IKZF2- dependent disease or disorder.

In another aspect, the present disclosure the use of a compound of Formula (I), or a 20 pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, in the treatment of an IKZF2-dependent disease or disorder by reducing or decreasing IKZF2 protein levels wherein reduction of or decrease in IKZF2 protein levels treats the IKZF2-dependent disease or disorder.

25 In another aspect, the present disclosure the use of a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, in the manufacture of a medicament for treating an IKZF2- dependent disease or disorder by reducing or decreasing IKZF2 protein levels wherein reduction of or 30 decrease in IKZF2 protein levels treats the IKZF2-dependent disease or disorder.

Another aspect of the disclosure relates to a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for use in the treatment of an IKZF2 and IKZF4-dependent disease or disorder by 35 reducing or decreasing IKZF2 and IKZF4 protein levels wherein the reduction of or decrease in IKZF2 and IKZF4 protein levels treats the IKZF2 and IKZF4-dependent disease or disorder. In another aspect, the present disclosure the use of a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, in the treatment of an IKZF2 and IKZF4-dependent disease or 5 disorder by reducing or decreasing IKZF2 and IKZF4 protein levels wherein the reduction of or decrease in IKZF2 and IKZF4 protein levels treats the IKZF2 and IKZF4-dependent disease or disorder.

In another aspect, the present disclosure the use of a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, 10 prodrug, stereoisomer, or tautomer thereof, in the manufacture of a medicament for treating an IKZF2 and IKZF4-dependent disease or disorder by reducing or decreasing IKZF2 and IKZF4 protein levels wherein the reduction of or decrease in IKZF2 and IKZF4 protein levels treats the IKZF2 and IKZF4-dependent disease or disorder.

Another aspect of the disclosure relates to a method of treating cancer. The method comprises 15 administering to a patient in need thereof an effective amount of a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof.

In another aspect, the present disclosure relates to the use of a compound of Formula (I), or a 20 pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, in the treatment of treating cancer.

Another aspect of the disclosure relates to a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising 25 a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for use in the manufacture of a medicament for treating cancer.

In another aspect, the present disclosure relates to a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, 30 or tautomer thereof, for use in the treatment of cancer.

Another aspect of the disclosure relates to a method of treating an IKZF2-dependent cancer. The method comprises administering to a patient in need thereof an effective amount of a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, 35 prodrug, stereoisomer, or tautomer thereof.

In another aspect, the present disclosure relates to the use of a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, in the treatment of treating an IKZF2-dependent cancer.

Another aspect of the disclosure relates to a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising 5 a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for use in the manufacture of a medicament for treating an IKZF2-dependent cancer.

In another aspect, the present disclosure relates to a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, 10 or tautomer thereof, for use in the treatment of an IKZF2-dependent cancer.

Another aspect of the disclosure relates to a method of treating an IKZF2-dependent and IKZF4- dependent cancer. The method comprises administering to a patient in need thereof an effective amount of a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof or a composition comprising a compound of Formula (I), or a pharmaceutically 15 acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof.

In another aspect, the present disclosure relates to the use of a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, in the treatment of treating an IKZF2-dependent and IKZF4- 20 dependent cancer.

Another aspect of the disclosure relates to a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for use in the manufacture of a medicament for treating an IKZF2-dependent and 25 IKZF4-dependent cancer.

In another aspect, the present disclosure relates to a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for use in the treatment of an IKZF2-dependent and IKZF4-dependent cancer.

30 Another aspect of the disclosure relates to a method of treating a cancer affected by the modulation of, the reduction of, or a decrease in IKZF2 protein levels. The method comprises administering to a patient in need thereof an effective amount of a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer 35 thereof.

In another aspect, the present disclosure relates to the use of a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, in the treatment of treating a cancer affected by the modulation of, the reduction of, or a decrease in IKZF2 protein levels

Another aspect of the disclosure relates to a compound of Formula (I), or a pharmaceutically 5 acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for use in the manufacture of a medicament for treating a cancer affected by the modulation of, the reduction of, or a decrease in IKZF2 protein levels.

In another aspect, the present disclosure relates to a compound of Formula (I), or a pharmaceutically 10 acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for use in the treatment of a cancer affected by the modulation of, the reduction of, or a decrease in IKZF2 protein levels.

Another aspect of the disclosure relates to a method of treating a cancer affected by the modulation 15 of, the reduction of, or a decrease in IKZF2 and IKZF4 protein levels. The method comprises administering to a patient in need thereof an effective amount of a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof.

20 In another aspect, the present disclosure relates to the use of a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, in the treatment of treating a cancer affected by the modulation of, the reduction of, or a decrease in IKZF2 and IKZF4 protein levels.

25 Another aspect of the disclosure relates to a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for use in the manufacture of a medicament for treating a cancer affected by the modulation of, the reduction of, or a decrease in IKZF2 and IKZF4 protein levels.

30 In another aspect, the present disclosure relates to a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for use in the treatment of a cancer affected by the modulation of, the reduction of, or a decrease in IKZF2 and IKZF4 protein levels.

35 Another aspect of the disclosure relates to a method of degrading IKZF2. The method comprises administering to a patient in need thereof an effective amount of a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof. In some embodiments, IKZF2 protein degradation is mediated by an E3 ligase.

In another aspect, the present disclosure relates to the use of a compound of Formula (I), or a 5 pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for degrading IKZF2. In some embodiments, IKZF2 protein degradation is mediated by an E3 ligase.

Another aspect of the disclosure relates to a compound of Formula (I), or a pharmaceutically 10 acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for use in the degradation IKZF2. In some embodiments, IKZF2 protein degradation is mediated by an E3 ligase.

In another aspect, the present disclosure relates to a compound of Formula (I), or a pharmaceutically 15 acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for use in the manufacture of a medicament for degrading IKZF2. In some embodiments, IKZF2 protein degradation is mediated by an E3 ligase.

In another aspect, the present disclosure relates to a method of modulating IKZF2 protein levels 20 through degradation of IKZF2. The method comprises administering to a patient in need thereof an effective amount of a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof. In some embodiments, IKZF2 protein degradation is mediated by an E3 ligase.

25 Another aspect of the disclosure relates to the use of a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for modulating IKZF2 protein levels through degradation of IKZF2. In some embodiments, IKZF2 protein degradation is mediated by an E3 ligase.

30 In another aspect, the present disclosure relates to a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for use in the modulation IKZF2 protein levels through degradation of IKZF2. In some embodiments, IKZF2 protein degradation is mediated by an E3 ligase.

35 Another aspect of the disclosure relates to a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for use in the manufacture of a medicament for modulating IKZF2 protein levels through degradation of IKZF2. In some embodiments, IKZF2 protein degradation is mediated by an E3 ligase.

Another aspect of the disclosure relates to a method of treating an IKZF2-dependent disease or 5 disorder in a patient in need thereof by modulating IKZF2 protein levels through the degradation of IKZF2.

In some embodiments, IKZF2 protein degradation is mediated by an E3 ligase.

In another aspect, the present disclosure relates to the use of a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, 10 prodrug, stereoisomer, or tautomer thereof, for treating an IKZF2-dependent disease or disorder in a patient in need thereof by modulating IKZF2 protein levels through the degradation of IKZF2. In some embodiments, IKZF2 protein degradation is mediated by an E3 ligase.

Another aspect of the disclosure relates to a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising 15 a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for use in treating an IKZF2-dependent disease or disorder in a patient in need thereof, by modulating IKZF2 protein levels through the degradation of IKZF2. In some embodiments, IKZF2 protein degradation is mediated by an E3 ligase.

In another aspect, the present disclosure relates to a compound of Formula (I), or a pharmaceutically 20 acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for use in the manufacture of a medicament for treating an IKZF2-dependent disease or disorder in a patient in need thereof by modulating IKZF2 protein levels through the degradation of IKZF2. In some embodiments, IKZF2 protein degradation is mediated by an E3 ligase.

25 Another aspect of the disclosure relates to a method of reducing the proliferation of a cell, the method comprising contacting the cell with a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, that reduces IKZF2 protein levels. In some embodiments, IKZF2 protein levels are reduced through 30 degradation of the IKZF2 protein. In some embodiments, IKZF2 protein levels are reduced through degradation of the IKZF2 protein mediated by an E3 ligase.

In another aspect, the present disclosure relates to the use a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, 35 prodrug, stereoisomer, or tautomer thereof, for reducing the proliferation of a cell by reducing IKZF2 protein levels. In some embodiments, IKZF2 protein levels are reduced through degradation of the IKZF2 protein. In some embodiments, IKZF2 protein levels are reduced through degradation of the IKZF2 protein mediated by an E3 ligase.

Another aspect of the disclosure relates to a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising 5 a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for use in reducing the proliferation of a cell by IKZF 2 protein levels. In some embodiments, IKZF2 protein levels are reduced through degradation of the IKZF2 protein. In some embodiments, IKZF2 protein levels are reduced through degradation of the IKZF2 protein mediated by an E3 ligase.

10 In another aspect, the present disclosure relates to a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for use in the manufacture of a medicament for reducing the proliferation of a cell by reducing IKZF2 protein levels. In some embodiments, IKZF2 protein levels are reduced through 15 degradation of the IKZF2 protein. In some embodiments, IKZF2 protein levels are reduced through degradation of the IKZF2 protein mediated by an E3 ligase.

In another aspect, the disclosure relates to a method of treating, preventing, inhibiting, or eliminating a disease or disorder that is affected by the modulation of, the reduction of, or a decrease in IKZF2 and IKZF4 protein levels. The method comprises administering to a patient in need thereof an 20 effective amount of a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof.

In another aspect, the disclosure relates to the use of a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a 25 composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, in the manufacture of a medicament for the treatment, prevention, inhibition or elimination of a disease or disorder that is affected by the modulation of IKZF2 and IKZF4 protein levels.

Another aspect of the disclosure relates to a compound of Formula (I), or a pharmaceutically 30 acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for use in the manufacture of a medicament for treating, preventing, inhibiting, or eliminating a disease or disorder that is affected by the modulation of, the reduction of, or a decrease in IKZF2 and IKZF4 protein levels.

35 In another aspect, the disclosure relates to the use a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, in the manufacture of a medicament for the treatment, prevention, inhibition or elimination of a disease or disorder that is affected by the reduction of or a decrease in IKZF2 and IKZF4 protein levels.

Another aspect of the disclosure relates to a compound of Formula (I), or a pharmaceutically 5 acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for use in the manufacture of a medicament for treating, preventing, inhibiting, or eliminating a disease or disorder that is affected by the reduction of or a decrease in IKZF2 and IKZF4 protein levels.

10 Another aspect of the disclosure relates to a method of degrading IKZF2 and IKZF4. The method comprises administering to a patient in need thereof an effective amount of a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof. In some embodiments, IKZF2 and IKZF4 protein degradation 15 is mediated by an E3 ligase.

In another aspect, the present disclosure relates to the use of a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for degrading IKZF2 and IKZF4. In some embodiments, IKZF2 20 and IKZF4 protein degradation is mediated by an E3 ligase.

Another aspect of the disclosure relates to a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for use in the degradation IKZF2 and IKZF4. In some embodiments, IKZF2 and IKZF4 25 protein degradation is mediated by an E3 ligase.

In another aspect, the present disclosure relates to a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for use in the manufacture of a medicament for degrading IKZF2 and IKZF4. In some 30 embodiments, IKZF2 and IKZF4 protein degradation is mediated by an E3 ligase.

In another aspect, the present disclosure relates to a method of modulating IKZF2 and IKZF4 protein levels through degradation of IKZF2 and IKZF4. In some embodiments, IKZF2 and IKZF4 protein degradation is mediated by an E3 ligase.

Another aspect of the disclosure relates to the use of a compound of Formula (I), or a 35 pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for modulating IKZF2 and IKZF4 protein levels through degradation of IKZF2 and IKZF4. In some embodiments, IKZF2 and IKZF4 protein degradation is mediated by an E3 ligase.

In another aspect, the present disclosure relates to a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising 5 a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for use in the modulation of IKZF2 and IKZF4 protein levels through degradation of IKZF2 and IKZF4. In some embodiments, IKZF2 and IKZF4 protein degradation is mediated by an E3 ligase.

Another aspect of the disclosure relates to a compound of Formula (I), or a pharmaceutically 10 acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for use in the manufacture of a medicament for modulating IKZF2 and IKZF4 protein levels through degradation of IKZF2 and IKZF4. In some embodiments, IKZF2 and IKZF4 protein degradation is mediated by an E3 ligase.

15 Another aspect of the disclosure relates to a method of treating an IKZF2-dependent and IKZF4- dependent disease or disorder in a patient in need thereof by modulating IKZF2 and IKZF4 protein levels through the degradation of IKZF2 and IKZF4. In some embodiments, IKZF2 and IKZF4 protein degradation is mediated by an E3 ligase.

In another aspect, the present disclosure relates to the use of a compound of Formula (I), or a 20 pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for treating an IKZF2-dependent and IKZF4-dependent disease or disorder in a patient in need thereof by modulating IKZF2 and IKZF4 protein levels through the degradation of IKZF2 and IKZF4. In some embodiments, IKZF2 and IKZF4 protein degradation is 25 mediated by an E3 ligase.

Another aspect of the disclosure relates to a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for use in treating an IKZF2-dependent and IKZF4-dependent disease or disorder in a 30 patient in need thereof by modulating IKZF2 and IKZF4 protein levels through the degradation of IKZF2 and IKZF4. In some embodiments, IKZF2 and IKZF4 protein degradation is mediated by an E3 ligase.

In another aspect, the present disclosure relates to a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer,35 or tautomer thereof, for use in the manufacture of a medicament for treating an IKZF2-dependent or IKZF4- dependent disease or disorder in a patient in need thereof by modulating IKZF2 and IKZF4 protein levels through the degradation of IKZF2 and IKZF4. In some embodiments, IKZF2 and IKZF4 protein degradation is mediated by an E3 ligase.

Another aspect of the disclosure relates to a method of reducing the proliferation of a cell, the method comprising contacting the cell with a compound of Formula (I), or a pharmaceutically acceptable 5 salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, and reducing IKZF2 and IKZF4 protein levels. In some embodiments, IKZF2 and IKZF4 protein levels are reduced through degradation of the IKZF2 and IKZF4 proteins. In other embodiments, IKZF2 and IKZF4 protein levels are reduced through degradation of the IKZF2 and IKZF4 proteins mediated by 10 an E3 ligase.

In another aspect, the present disclosure relates to the use a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for reducing the proliferation of a cell by reducing IKZF2 and 15 IKZF4 protein levels. In some embodiments, IKZF2 and IKZF4 protein levels are reduced through degradation of the IKZF2 and IKZF4 proteins. In other embodiments, IKZF2 and IKZF4 protein levels are reduced through degradation of the IKZF2 and IKZF4 proteins mediated by an E3 ligase.

Another aspect of the disclosure relates to a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising 20 a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for use in reducing the proliferation of a cell by reducing IKZF2 and IKZF4 protein levels. In some embodiments, IKZF2 and IKZF4 protein levels are reduced through degradation of the IKZF2 and IKZF4 proteins. In other embodiments, IKZF2 and IKZF4 protein levels are reduced through degradation of the IKZF2 and IKZF4 proteins mediated by an E3 ligase.

25 In another aspect, the present disclosure relates to a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for use in the manufacture of a medicament for reducing the proliferation of a cell by reducing IKZF2 and IKZF4 protein levels. In some embodiments, IKZF2 and IKZF4 protein levels are 30 reduced through degradation of the IKZF2 and IKZF4 proteins. In other embodiments, IKZF2 and IKZF4 protein levels are reduced through degradation of the IKZF2 and IKZF4 proteins mediated by an E3 ligase.

In another aspect, the present disclosure relates to a method for treating an IKZF2-dependent disease or disorder. The method comprises the step of administering to a subject in need thereof a therapeutically effective amount of a compound of Formula (I), or a pharmaceutically acceptable salt, 35 hydrate, solvate, prodrug, stereoisomer, or tautomer thereof or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof. Another aspect of the disclosure relates to a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for use in the treatment of an IKZF2-dependent disease or disorder.

5 In another aspect, the present disclosure relates to the use of a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, in the manufacture of a medicament for treating an IKZF2-dependent disease or disorder.

Another aspect of the disclosure relates to a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising 10 a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for use in the manufacture of a medicament for treating an IKZF2-dependent disease or disorder.

In another aspect, the present disclosure relates to a method for treating an IKZF2-dependent and IKZF4-dependent disease or disorder. The method comprises the step of administering to a subject in need 15 thereof a therapeutically effective amount of a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof.

Another aspect of the disclosure relates to a compound of Formula (I), or a pharmaceutically 20 acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for use in the treatment of an IKZF2-dependent and IKZF4-dependent disease or disorder.

In another aspect, the present disclosure relates to the use of a compound of Formula (I), or a 25 pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, in the manufacture of a medicament for treating an IKZF2- dependent and IKZF4-dependent disease or disorder.

Another aspect of the disclosure relates to a compound of Formula (I), or a pharmaceutically 30 acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for use in the manufacture of a medicament for treating an IKZF2-dependent and IKZF4-dependent disease or disorder.

In another aspect, the present disclosure relates to a method of reducing IKZF2 protein levels. The 35 method comprises administering to the patient in need thereof a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof.

Another aspect of the present disclosure relates to a method of reducing IKZF2 and IKZF4 protein levels. The method comprises administering to the patient in need thereof a compound of Formula (I), or a 5 pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof.

In another aspect, the present disclosure relates to a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof or a composition comprising a 10 compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof for use in the reduction of IKZF2 protein levels.

Another aspect of the present disclosure relates to a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, 15 prodrug, stereoisomer, or tautomer thereof for use in the reduction of IKZF2 and IKZF4 protein levels.

In another aspect, the present disclosure relates to the use of a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof or a composition, in the manufacture of a medicament for reducing IKZF2 protein levels.

Another aspect of the present disclosure relates to the use of a compound of Formula (I), or a 20 pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, in the manufacture of a medicament for reducing IKZF2 and IKZF4 protein levels.

In another aspect, the present disclosure relates to a method of reducing IKZF2 protein levels, 25 wherein reduction of IKZF2 protein levels treats or ameliorates the disease or disorder. The method comprises administering to the patient in need thereof a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof.

30 Another aspect of the present disclosure relates to a method of reducing IKZF2 and IKZF4 protein levels, wherein reduction of IKZF2 and IKZF4 protein levels treats or ameliorates the disease or disorder. The method comprises administering to the patient in need thereof a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, 35 prodrug, stereoisomer, or tautomer thereof.

In another aspect, the present disclosure relates to a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof for use in the reduction of IKZF2 protein levels, wherein reduction of IKZF2 protein levels treats or ameliorates the disease or disorder.

Another aspect of the present disclosure relates to a compound of Formula (I), or a 5 pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof for use in the reduction of IKZF2 and IKZF4 protein levels, wherein reduction of IKZF2 and IKZF4 protein levels treats or ameliorates the disease or disorder.

In another aspect, the present disclosure relates to the use of a compound of Formula (I), or a 10 pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof or a composition, in the manufacture of a medicament for reducing IKZF2 protein levels, wherein reduction of IKZF2 protein levels treats or ameliorates the disease or disorder.

Another aspect of the present disclosure relates to the use of a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof or a 15 composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, in the manufacture of a medicament for reducing IKZF2 and IKZF4 protein levels, wherein reduction of IKZF2 and IKZF4 protein levels treats or ameliorates the disease or disorder.

In another aspect, the present disclosure relates to a method of treating a disease or disorder by 20 reducing IKZF2 protein levels, wherein reduction of IKZF2 protein levels treats or ameliorates the disease or disorder. The method comprises administering to the patient in need thereof a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof.

25 Another aspect of the present disclosure relates to a method of treating a disease or disorder by reducing IKZF2 and IKZF4 protein levels, wherein reduction of IKZF2 and IKZF4 protein levels treats or ameliorates the disease or disorder. The method comprises administering to the patient in need thereof a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable 30 salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof.

In another aspect, the present disclosure relates to a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof for use in the treatment of a disease or disorder by reducing IKZF2 protein levels, wherein 35 reduction of IKZF2 protein levels treats or ameliorates the disease or disorder.

Another aspect of the present disclosure relates to a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof for use in the treatment of a disease or disorder by reducing IKZF2 and IKZF4 protein levels, wherein reduction of IKZF2 and IKZF4 protein levels treats or ameliorates the disease or disorder.

5 In another aspect, the present disclosure relates to the use of a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof or a composition, in the manufacture of a medicament for treating a disease or disorder by reducing IKZF2 protein levels, wherein reduction of IKZF2 protein levels treats or ameliorates the disease or disorder.

Another aspect of the present disclosure relates to the use of a compound of Formula (I), or a 10 pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof or a composition comprising a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, in the manufacture of a medicament for treating a disease or disorder by reducing IKZF2 and IKZF4 protein levels, wherein reduction of IKZF2 and IKZF4 protein levels treats or ameliorates the disease or disorder.

15 The compounds of the present disclosure can be used for the treatment, of a disease or disorder selected from liposarcoma, neuroblastoma, glioblastoma, bladder cancer, adrenocortical cancer, multiple myeloma, colorectal cancer, non-small cell lung cancer, Human Papilloma Virus-associated cervical, oropharyngeal, penis, anal, thyroid, or vaginal cancer or Epstein-Barr Virus-associated nasopharyngeal carcinoma, gastric cancer, rectal cancer, thyroid cancer, Hodgkin lymphoma or diffuse large B-cell 20 lymphoma. the cancer is selected from prostate cancer, breast carcinoma, lymphomas, leukaemia, myeloma, bladder carcinoma, colon cancer, cutaneous melanoma, hepatocellular carcinoma, endometrial cancer, ovarian cancer, cervical cancer, lung cancer, renal cancer, glioblastoma multiform, glioma, thyroid cancer, parathyroid tumor, nasopharyngeal cancer, tongue cancer, pancreatic cancer, esophageal cancer, cholangiocarcinoma, gastric cancer, soft tissue sarcomas, rhabdomyosarcoma (RMS), synovial sarcoma, 25 osteosarcoma, rhabdoid cancers, cancer for which the immune response is deficient, an immunogenic cancer, and Ewing’s sarcoma. In one embodiment, the IKZF2-dependent disease or disorder is a disease or disorder is selected from non-small cell lung cancer (NSCLC), melanoma, triple-negative breast cancer (TNBC), nasopharyngeal cancer (NPC), microsatellite stable colorectal cancer (mssCRC), thymoma, carcinoid, and gastrointestinal stromal tumor (GIST). In another embodiment, the cancer is selected from 30 non-small cell lung cancer (NSCLC), melanoma, triple-negative breast cancer (TNBC), nasopharyngeal cancer (NPC), microsatellite stable colorectal cancer (mssCRC), thymoma, carcinoid, acute myelogenous leukemia, and gastrointestinal stromal tumor (GIST). In another embodiment, the IKZF2-dependent disease or disorder is a disease or disorder is selected from non-small cell lung cancer (NSCLC), melanoma, triple- negative breast cancer (TNBC), nasopharyngeal cancer (NPC), and microsatellite stable colorectal cancer 35 (mssCRC).

The disclosed compounds of the disclosure can be administered in effective amounts to treat or prevent a disorder and/or prevent the development thereof in subjects. G. Administration, Pharmaceutical Compositions, and Dosing of Compounds of the Disclosure Administration of the disclosed compounds can be accomplished via any mode of administration for therapeutic agents. These modes include systemic or local administration such as oral, nasal, parenteral, transdermal, subcutaneous, vaginal, buccal, rectal or topical administration modes.

5 Depending on the intended mode of administration, the disclosed compositions can be in solid, semi-solid or liquid dosage form, such as, for example, injectables, tablets, suppositories, pills, time-release capsules, elixirs, tinctures, emulsions, syrups, powders, liquids, suspensions, or the like, sometimes in unit dosages and consistent with conventional pharmaceutical practices. Likewise, they can also be administered in intravenous (both bolus and infusion), intraperitoneal, subcutaneous or intramuscular form, and all using 10 forms well known to those skilled in the pharmaceutical arts.

Illustrative pharmaceutical compositions are tablets and gelatin capsules comprising a compound of the disclosure and a pharmaceutically acceptable carrier, such as a) a diluent, e.g., purified water, triglyceride oils, such as hydrogenated or partially hydrogenated vegetable oil, or mixtures thereof, com oil, olive oil, sunflower oil, safflower oil, fish oils, such as EPA or DHA, or their esters or triglycerides or 15 mixtures thereof, omega-3 fatty acids or derivatives thereof, lactose, dextrose, sucrose, mannitol, sorbitol, cellulose, sodium, saccharin, glucose and/or glycine; b) a lubricant, e.g., silica, talcum, stearic acid, its magnesium or calcium salt, sodium oleate, sodium stearate, magnesium stearate, sodium benzoate, sodium acetate, sodium chloride, and/or polyethylene glycol; for tablets also; c) a binder, e.g., magnesium aluminum silicate, starch paste, gelatin, tragacanth, methylcellulose, sodium carboxymethylcellulose, 20 magnesium carbonate, natural sugars such as glucose or beta-lactose, corn sweeteners, natural and synthetic gums such as acacia, tragacanth or sodium alginate, waxes, and/or polyvinylpyrrolidone, if desired; d) a disintegrant, e.g., starches, agar, methyl cellulose, bentonite, xanthan gum, algic acid or its sodium salt, or effervescent mixtures; e) absorbent, colorant, flavorant and sweetener; f) an emulsifier or dispersing agent, such as Tween 80, Labrasol, HPMC, DOSS, caproyl 909, labrafac, labrafil, peceol, transcutol, capmul 25 MCM, capmul PG-12, captex 355, gelucire, vitamin E TGPS or other acceptable emulsifier; and/or g) an agent that enhances absorption of the compound such as cyclodextrin, hydroxypropyl-cyclodextrin, PEG400, PEG200.

Liquid, particularly injectable, compositions can, for example, be prepared by dissolution, dispersion, etc. For example, the disclosed compound is dissolved in or mixed with a pharmaceutically 30 acceptable solvent such as, for example, water, saline, aqueous dextrose, glycerol, ethanol, and the like, to thereby form an injectable isotonic solution or suspension. Proteins such as albumin, chylomicron particles, or serum proteins can be used to solubilize the disclosed compounds.

The disclosed compounds can be also formulated as a suppository that can be prepared from fatty emulsions or suspensions; using polyalkylene glycols such as propylene glycol, as the carrier.

35 The disclosed compounds can also be administered in the form of liposome delivery systems, such as small unilamellar vesicles, large unilamellar vesicles, and multilamellar vesicles. Liposomes can be formed from a variety of phospholipids, containing cholesterol, stearylamine or phosphatidylcholines. In some embodiments, a film of lipid components is hydrated with an aqueous solution of drug to a form lipid layer encapsulating the drug, as described in U.S. Pat. No. 5,262,564 which is hereby incorporated by reference in its entirety.

Disclosed compounds can also be delivered by the use of monoclonal antibodies as individual 5 carriers to which the disclosed compounds are coupled. The disclosed compounds can also be coupled with soluble polymers as targetable drug carriers. Such polymers can include polyvinylpyrrolidone, pyran copolymer, polyhydroxypropylmethacrylamide-phenol, polyhydroxyethylaspanamidephenol, or polyethyleneoxidepolylysine substituted with palmitoyl residues. Furthermore, the disclosed compounds can be coupled to a class of biodegradable polymers useful in achieving controlled release of a drug, for 10 example, polylactic acid, polyepsilon caprolactone, polyhydroxy butyric acid, polyorthoesters, polyacetals, polydihydropyrans, polycyanoacrylates, and cross-linked or amphipathic block copolymers of hydrogels. In one embodiment, disclosed compounds are not covalently bound to a polymer, e.g., a polycarboxylic acid polymer, or a polyacrylate.

Parental injectable administration is generally used for subcutaneous, intramuscular or intravenous 15 injections and infusions. Injectables can be prepared in conventional forms, either as liquid solutions or suspensions or solid forms suitable for dissolving in liquid prior to injection.

Another aspect of the disclosure is directed to pharmaceutical compositions comprising a compound of Formula (I), and a pharmaceutically acceptable carrier. The pharmaceutical acceptable carrier may further include an excipient, diluent, or surfactant.

20 Compositions can be prepared according to conventional mixing, granulating or coating methods, respectively, and the present pharmaceutical compositions can contain from about 0.1% to about 99%, from about 5% to about 90%, or from about 1% to about 20% of the disclosed compound by weight or volume.

In one embodiment, the disclosure provides a kit comprising two or more separate pharmaceutical compositions, at least one of which contains a compound of the present disclosure. In one embodiment, the 25 kit comprises means for separately retaining said compositions, such as a container, divided bottle, or divided foil packet. An example of such a kit is a blister pack, as typically used for the packaging of tablets, capsules and the like.

The kit of the disclosure may be used for administering different dosage forms, for example, oral and parenteral, for administering the separate compositions at different dosage intervals, or for titrating the 30 separate compositions against one another. To assist compliance, the kit of the disclosure typically comprises directions for administration.

The dosage regimen utilizing the disclosed compound is selected in accordance with a variety of factors including type, species, age, weight, sex, and medical condition of the patient; the severity of the condition to be treated; the route of administration; the renal or hepatic function of the patient; and the 35 particular disclosed compound employed. A physician or veterinarian of ordinary skill in the art can readily determine and prescribe the effective amount of the drug required to prevent, counter or arrest the progress of the condition. Effective dosage amounts of the disclosed compounds, when used for the indicated effects, range from about 0.5 mg to about 5000 mg of the disclosed compound as needed to treat the condition. Compositions for in vivo or in vitro use can contain about 0.5, 5, 20, 50, 75, 100, 150, 250, 500, 750, 1000, 1250, 2500, 3500, or 5000 mg of the disclosed compound, or, in a range of from one amount to another 5 amount in the list of doses. In one embodiment, the compositions are in the form of a tablet that can be scored.

H. Combination Therapy

The compounds of the disclosure can be administered in therapeutically effective amounts in a combinational therapy with one or more therapeutic agents (pharmaceutical combinations) or modalities, 10 e.g., non-drug therapies. For example, synergistic effects can occur with other cancer agents. Where the compounds of the application are administered in conjunction with other therapies, dosages of the co- administered compounds will of course vary depending on the type of co-drug employed, on the specific drug employed, on the condition being treated and so forth.

The compounds can be administered simultaneously (as a single preparation or separate 15 preparation), sequentially, separately, or over a period of time to the other drug therapy or treatment modality. In general, a combination therapy envisions administration of two or more drugs during a single cycle or course of therapy. A therapeutic agent is, for example, a chemical compound, peptide, antibody, antibody fragment or nucleic acid, which is therapeutically active or enhances the therapeutic activity when administered to a patient in combination with a compound of the present disclosure.

20 In one aspect, a compound of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, of the present disclosure can be combined with other therapeutic agents, such as other anti-cancer agents, anti-allergic agents, anti-nausea agents (or anti-emetics), pain relievers, cytoprotective agents, and combinations thereof.

In some embodiments, the compounds of Formula (I), or a pharmaceutically acceptable salt, 25 hydrate, solvate, prodrug, stereoisomer, or tautomer thereof of the present disclosure are administered in combination with one or more second agent(s) selected from a PD-1 inhibitor, a PD-L1 inhibitor, a LAG- 3 inhibitor, a cytokine, an A2A antagonist, a GITR agonist, a TIM-3 inhibitor, a STING agonist, and a TLR7 agonist, to treat a disease, e.g., cancer.

In another embodiment, one or more chemotherapeutic agents are used in combination with the 30 compounds of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for treating a disease, e.g., cancer, wherein said chemotherapeutic agents include, but are not limited to, anastrozole (Arimidex®), bicalutamide (Casodex®), bleomycin sulfate (Blenoxane®), busulfan (Myleran®), busulfan injection (Busulfex®), capecitabine (Xeloda®), N4-pentoxycarbonyl-5- deoxy-5-fluorocytidine, carboplatin (Paraplatin®), carmustine (BiCNU®), chlorambucil (Leukeran®), 35 cisplatin (Platinol®), cladribine (Leustatin®), cyclophosphamide (Cytoxan® or Neosar®), cytarabine, cytosine arabinoside (Cytosar-U®), cytarabine liposome injection (DepoCyt®), dacarbazine (DTIC- Dome®), dactinomycin (Actinomycin D, Cosmegan), daunorubicin hydrochloride (Cerubidine®), daunorubicin citrate liposome injection (DaunoXome®), dexamethasone, docetaxel (Taxotere®), doxorubicin hydrochloride (Adriamycin®, Rubex®), etoposide (Vepesid®), fludarabine phosphate (Fludara®), 5-fluorouracil (Adrucil®, Efudex®), flutamide (Eulexin®), tezacitibine, Gemcitabine (difluorodeoxycitidine), hydroxyurea (Hydrea®), Idarubicin (Idamycin®), ifosfamide (IFEX®), irinotecan 5 (Camptosar®), L-asparaginase (ELSPAR®), leucovorin calcium, melphalan (Alkeran®), 6- mercaptopurine (Purinethol®), methotrexate (Folex®), mitoxantrone (Novantrone®), mylotarg, paclitaxel (Taxol®), phoenix (Yttrium90/MX-DTPA), pentostatin, polifeprosan 20 with carmustine implant (Gliadel®), tamoxifen citrate (Nolvadex®), teniposide (Vumon®), 6-thioguanine, thiotepa, tirapazamine (Tirazone®), topotecan hydrochloride for injection (Hycamptin®), vinblastine (Velban®), vincristine 10 (Oncovin®), vinorelbine (Navelbine®), epirubicin (Ellence®), oxaliplatin (Eloxatin®), exemestane (Aromasin®), letrozole (Femara®), and fulvestrant (Faslodex®).

In other embodiments, the compounds of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, of the present disclosure are used in combination with one or more other anti-HER ₂ antibodies, e.g., trastuzumab, pertuzumab, margetuximab, 15 or HT-19 described above, or with other anti-HER ₂ conjugates, e.g., ado-trastuzumab emtansine (also known as Kadcyla®, or T-DM1).

In other embodiments, the compounds of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, of the present disclosure are used in combination with one or more tyrosine kinase inhibitors, including but not limited to, EGFR inhibitors, 20 Her3 inhibitors, IGFR inhibitors, and Met inhibitors, for treating a disease, e.g., cancer.

For example, tyrosine kinase inhibitors include but are not limited to, Erlotinib hydrochloride (Tarceva®); Linifanib (N-[4-(3-amino-1H-indazol-4-yl)phenyl]-N'-(2-fluoro-5-methyl phenyl)urea, also known as ABT 869, available from Genentech); Sunitinib malate (Sutent®); Bosutinib (4-[(2,4-dichloro- 5-methoxyphenyl)amino]-6-methoxy-7-[3-(4-methylpiperazin-1-y l)propoxy]quinoline-3-carbonitrile, also 25 known as SKI-606, and described in US Patent No. 6,780,996); Dasatinib (Sprycel®); Pazopanib (Votrient®); Sorafenib (Nexavar®); Zactima (ZD6474); and Imatinib or Imatinib mesylate (Gilvec® and Gleevec®).

Epidermal growth factor receptor (EGFR) inhibitors include but are not limited to, Erlotinib hydrochloride (Tarceva®), Gefitinib (Iressa®); N-[4-[(3-Chloro-4-fluorophenyl)amino]-7-[[(3''S'')- 30 tetrahydro-3-furanyl]oxy]-6-quinazolinyl]-4(dimethylamino)-2 -butenamide, Tovok®); Vandetanib (Caprelsa®); Lapatinib (Tykerb®); (3R,4R)-4-Amino-1-((4-((3-methoxyphenyl)amino)pyrrolo[2,1- f][1,2,4]triazin-5-yl)methyl)piperidin-3-ol (BMS690514); Canertinib dihydrochloride (CI-1033); 6-[4-[(4- Ethyl-1-piperazinyl)methyl]phenyl]-N-[(1R)-1-phenylethyl]- 7H-Pyrrolo[2,3-d]pyrimidin-4-amine (AEE788, CAS 497839-62-0); Mubritinib (TAK165); Pelitinib (EKB569); Afatinib (Gilotrif®); Neratinib35 (HKI-272); N-[4-[[1-[(3-Fluorophenyl)methyl]-1H-indazol-5-yl]amino]-5-m ethylpyrrolo[2,1- f][1,2,4]triazin-6-yl]-carbamic acid, (3S)-3-morpholinylmethyl ester (BMS599626); N-(3,4-Dichloro-2- fluorophenyl)-6-methoxy-7-[[(3a ^,5 ^,6a ^)-octahydro-2-methylcyclopenta[c]pyrrol-5-yl]methoxy]- 4- quinazolinamine (XL647, CAS 781613-23-8); and 4-[4-[[(1R)-1-Phenylethyl]amino]-7H-pyrrolo[2,3- d]pyrimidin-6-yl]-phenol (PKI166, CAS187724-61-4).

EGFR antibodies include but are not limited to, Cetuximab (Erbitux®); Panitumumab (Vectibix®); Matuzumab (EMD-72000); Nimotuzumab (hR3); Zalutumumab; TheraCIM h-R3; MDX0447 (CAS 5 339151-96-1); and ch806 (mAb-806, CAS 946414-09-1).

Other HER ₂ inhibitors include but are not limited to, Neratinib (HKI-272, (2E)-N-[4-[[3-chloro-4- [(pyridin-2-yl)methoxy]phenyl]amino]-3-cyano-7-ethoxyquinoli n-6-yl]-4-(dimethylamino)but-2-enamide, and described PCT Publication No. WO 05/028443); Lapatinib or Lapatinib ditosylate (Tykerb®); (3R,4R)- 4-amino-1-((4-((3-methoxyphenyl)amino)pyrrolo[2,1-f][1,2,4]t riazin-5-yl)methyl)piperidin-3-ol10 (BMS690514); (2E)-N-[4-[(3-Chloro-4-fluorophenyl)amino]-7-[[(3S)-tetrahyd ro-3-furanyl]oxy]-6- quinazolinyl]-4-(dimethylamino)-2-butenamide (BIBW-2992, CAS 850140-72-6); N-[4-[[1-[(3- Fluorophenyl)methyl]-1H-indazol-5-yl]amino]-5-methylpyrrolo[ 2,1-f][1,2,4]triazin-6-yl]-carbamic acid, (3S)-3-morpholinylmethyl ester (BMS 599626, CAS 714971-09-2); Canertinib dihydrochloride (PD183805 or CI-1033); and N-(3,4-Dichloro-2-fluorophenyl)-6-methoxy-7-[[(3a ^,5 ^,6a ^)-octahydro-2- 15 methylcyclopenta[c]pyrrol-5-yl]methoxy]- 4-quinazolinamine (XL647, CAS 781613-23-8).

HER3 inhibitors include but are not limited to, LJM716, MM-121, AMG-888, RG7116, REGN- 1400, AV-203, MP-RM-1, MM-111, and MEHD-7945A.

MET inhibitors include but are not limited to, Cabozantinib (XL184, CAS 849217-68-1); Foretinib (GSK1363089, formerly XL880, CAS 849217-64-7); Tivantinib (ARQ197, CAS 1000873-98-2); 1-(2-20 Hydroxy-2-methylpropyl)-N-(5-(7-methoxyquinolin-4-yloxy)pyri din-2-yl)-5-methyl-3-oxo-2-phenyl-2,3- dihydro-1H-pyrazole-4-carboxamide (AMG 458); Cryzotinib (Xalkori®, PF-02341066); (3Z)-5-(2,3- Dihydro-1H-indol-1-ylsulfonyl)-3-({3,5-dimethyl-4-[(4-methyl piperazin-1-yl)carbonyl]-1H-pyrrol-2- yl}methylene)-1,3-dihydro-2H-indol-2-one (SU11271); (3Z)-N-(3-Chlorophenyl)-3-({3,5-dimethyl-4-[(4- methylpiperazin-1-yl)carbonyl]-1H-pyrrol-2-yl}methylene)-N-m ethyl-2-oxoindoline-5-sulfonamide25 (SU11274); (3Z)-N-(3-Chlorophenyl)-3-{[3,5-dimethyl-4-(3-morpholin-4-yl propyl)-1H-pyrrol-2- yl]methylene}-N-methyl-2-oxoindoline-5-sulfonamide (SU11606); 6-[Difluoro[6-(1-methyl-1Hpyrazol-4- yl)-1,2,4-triazolo[4,3-b]pyridazin-3-yl]methyl]-quinoline (JNJ38877605, CAS 943540-75-8); 2-[4-[1- (Quinolin-6-ylmethyl)-1H-[1,2,3]triazolo[4,5-b]pyrazin-6-yl] -1H-pyrazol-1-yl]ethanol (PF04217903, CAS 956905-27-4); N-((2R)-1,4-Dioxan-2-ylmethyl)-N-methyl-N'-[3-(1-methyl-1H-p yrazol-4-yl)-5-oxo-30 5H-benzo[4,5]cyclohepta[1,2-b]pyridin-7-yl]sulfamide (MK2461, CAS 917879-39-1); 6-[[6-(1-Methyl- 1H-pyrazol-4-yl)-1,2,4-triazolo[4,3-b]pyridazin 3-yl]thio]-quinoline (SGX523, CAS 1022150-57-7); and (3Z)-5-[[(2,6-Dichlorophenyl)methyl]sulfonyl]-3-[[3,5-dimeth yl-4-[[(2R)-2-(1-pyrrolidinylmethyl)-1- pyrrolidinyl]carbonyl]-1H-pyrrol-2-yl]methylene]-1,3-dihydro -2H-indol-2-one (PHA665752, CAS 477575-56-7).

35 IGFR inhibitors include but are not limited to, BMS-754807, XL-228, OSI-906, GSK0904529A, A-928605, AXL1717, KW-2450, MK0646, AMG479, IMCA12, MEDI-573, and BI836845. See e.g., Yee, JNCI, 104; 975 (2012) for review. In another embodiment, the compounds of Formula (I) of the present disclosure are used in combination with one or more proliferation signaling pathway inhibitors, including but not limited to, MEK inhibitors, BRAF inhibitors, PI3K/Akt inhibitors, SHP2 inhibitors, and also mTOR inhibitors, and CDK inhibitors, for treating a disease, e.g., cancer.

5 For example, mitogen-activated protein kinase (MEK) inhibitors include but are not limited to, XL- 518 (also known as GDC-0973, Cas No. 1029872-29-4, available from ACC Corp.); 2-[(2-Chloro-4- iodophenyl)amino]-N-(cyclopropylmethoxy)-3,4-difluoro-benzam ide (also known as CI-1040 or PD184352 and described in PCT Publication No. WO2000035436); N-[(2R)-2,3-Dihydroxypropoxy]-3,4- difluoro-2-[(2-fluoro-4-iodophenyl)amino]- benzamide (also known as PD0325901 and described in PCT 10 Publication No. WO2002006213); 2,3-Bis[amino[(2-aminophenyl)thio]methylene]-butanedinitrile (also known as U0126 and described in US Patent No. 2,779,780); N-[3,4-Difluoro-2-[(2-fluoro-4- iodophenyl)amino]-6-methoxyphenyl]-1-[(2R)-2,3-dihydroxyprop yl]- cyclopropanesulfonamide (also known as RDEA119 or BAY869766 and described in PCT Publication No. WO2007014011); (3S,4R,5Z,8S,9S,11E)-14-(Ethylamino)-8,9,16-trihydroxy-3,4-d imethyl-3,4,9, 19-tetrahydro-1H-2- 15 benzoxacyclotetradecine-1,7(8H)-dione] (also known as E6201 and described in PCT Publication No.

WO2003076424); 2’-Amino-3’-methoxyflavone (also known as PD98059 available from Biaffin GmbH & Co., KG, Germany); Vemurafenib (PLX-4032, CAS 918504-65-1); (R)-3-(2,3-Dihydroxypropyl)-6-fluoro- 5-(2-fluoro-4-iodophenylamino)-8-methylpyrido[2,3-d]pyrimidi ne-4,7(3H,8H)-dione (TAK-733, CAS 1035555-63-5); Pimasertib (AS-703026, CAS 1204531-26-9); and Trametinib dimethyl sulfoxide (GSK- 20 1120212, CAS 1204531-25-80).

BRAF inhibitors include, but are not limited to, Vemurafenib (or Zelboraf®), GDC-0879, PLX- 4720 (available from Symansis), Dabrafenib (or GSK2118436), LGX 818, CEP-32496, UI-152, RAF 265, Regorafenib (BAY 73-4506), CCT239065, or Sorafenib (or Sorafenib Tosylate, or Nexavar®), or Ipilimumab (or MDX-010, MDX-101, or Yervoy).

25 Phosphoinositide 3-kinase (PI3K) inhibitors include, but are not limited to, 4-[2-(1H-Indazol-4-yl)- 6-[[4-(methylsulfonyl)piperazin-1-yl]methyl]thieno[3,2-d]pyr imidin-4-yl]morpholine (also known as GDC0941, RG7321, GNE0941, Pictrelisib, or Pictilisib; and described in PCT Publication Nos. WO 09/036082 and WO 09/055730); Tozasertib (VX680 or MK-0457, CAS 639089-54-6); (5Z)-5-[[4-(4- Pyridinyl)-6-quinolinyl]methylene]-2,4-thiazolidinedione (GSK1059615, CAS 958852-01-2);30 (1E,4S,4aR,5R,6aS,9aR)-5-(Acetyloxy)-1-[(di-2-propenylamino) methylene]-4,4a,5,6,6a,8,9,9a- octahydro-11-hydroxy-4-(methoxymethyl)-4a,6a-dimethylcyclope nta[5,6]naphtho[1,2-c]pyran- 2,7,10(1H)-trione (PX866, CAS 502632-66-8); 8-Phenyl-2-(morpholin-4-yl)-chromen-4-one (LY294002, CAS 154447-36-6); (S)-N1-(4-methyl-5-(2-(1,1,1-trifluoro-2-methylpropan-2-yl)p yridin-4-yl)thiazol-2- yl)pyrrolidine-1,2-dicarboxamide (also known as BYL719 or Alpelisib); 2-(4-(2-(1-isopropyl-3-methyl-35 1H-1,2,4-triazol-5-yl)-5,6-dihydrobenzo[f]imidazo[1,2-d][1,4 ]oxazepin-9-yl)-1H-pyrazol-1-yl)-2- methylpropanamide (also known as GDC0032, RG7604, or Taselisib). mTOR inhibitors include but are not limited to, Temsirolimus (Torisel®); Ridaforolimus (formally known as deferolimus, (1R,2R,4S)-4-[(2R)-2 [(1R,9S,12S,15R,16E,18R,19R,21R,23S,24E,26E,28Z,30S,32S,35R) -1,18-dihydroxy-19,30-dimethoxy- 15,17,21,23, 29,35-hexamethyl-2,3,10,14,20-pentaoxo-11,36-dioxa-4-azatric yclo[30.3.1.04,9] 5 hexatriaconta-16,24,26,28-tetraen-12-yl]propyl]-2-methoxycyc lohexyl dimethylphosphinate, also known as AP23573 and MK8669, and described in PCT Publication No. WO 03/064383); Everolimus (Afinitor® or RAD001); Rapamycin (AY22989, Sirolimus®); Simapimod (CAS 164301-51-3); (5-{2,4-Bis[(3S)-3- methylmorpholin-4-yl]pyrido[2,3-d]pyrimidin-7-yl}-2-methoxyp henyl)methanol (AZD8055); 2-Amino- 8-[trans-4-(2-hydroxyethoxy)cyclohexyl]-6-(6-methoxy-3-pyrid inyl)-4-methyl-pyrido[2,3-d]pyrimidin-10 7(8H)-one (PF04691502, CAS 1013101-36-4); and N ² -[1,4-dioxo-4-[[4-(4-oxo-8-phenyl-4H-1- benzopyran-2-yl)morpholinium-4-yl]methoxy]butyl]-L-arginylgl ycyl-L- ^-aspartylL-serine-, inner salt (SF1126, CAS 936487-67-1).

CDK inhibitors include but are not limited to, Palbociclib (also known as PD-0332991, Ibrance®, 6-Acetyl-8-cyclopentyl-5-methyl-2-{[5-(1-piperazinyl)-2-pyri dinyl]amino}pyrido[2,3-d]pyrimidin- 15 7(8H)-one).

In yet another embodiment, the compounds of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, of the present disclosure are used in combination with one or more pro-apoptotics, including but not limited to, IAP inhibitors, BCL2 inhibitors, MCL1 inhibitors, TRAIL agents, CHK inhibitors, for treating a disease, e.g., cancer.

20 For examples, IAP inhibitors include but are not limited to, LCL161, GDC-0917, AEG-35156, AT406, and TL32711. Other examples of IAP inhibitors include but are not limited to those disclosed in WO04/005284, WO 04/007529, WO05/097791, WO 05/069894, WO 05/069888, WO 05/094818, US2006/0014700, US2006/0025347, WO 06/069063, WO 06/010118, WO 06/017295, and WO08/134679, all of which are incorporated herein by reference.

25 BCL-2 inhibitors include but are not limited to, 4-[4-[[2-(4-Chlorophenyl)-5,5-dimethyl-1- cyclohexen-1-yl]methyl]-1-piperazinyl]-N-[[4-[[(1R)-3-(4-mor pholinyl)-1- [(phenylthio)methyl]propyl]amino]-3-[(trifluoromethyl)sulfon yl]phenyl]sulfonyl]benzamide (also known as ABT-263 and described in PCT Publication No. WO 09/155386); Tetrocarcin A; Antimycin; Gossypol ((-)BL-193); Obatoclax; Ethyl-2-amino-6-cyclopentyl-4-(1-cyano-2-ethoxy-2-oxoethyl)- 4Hchromone-3- 30 carboxylate (HA14–1); Oblimersen (G3139, Genasense®); Bak BH3 peptide; (-)-Gossypol acetic acid (AT-101); 4-[4-[(4'-Chloro[1,1'-biphenyl]-2-yl)methyl]-1-piperazinyl]- N-[[4-[[(1R)-3-(dimethylamino)-1- [(phenylthio)methyl]propyl]amino]-3-nitrophenyl]sulfonyl]-be nzamide (ABT-737, CAS 852808-04-9); and Navitoclax (ABT-263, CAS 923564-51-6).

Proapoptotic receptor agonists (PARAs) including DR4 (TRAILR1) and DR5 (TRAILR ₂ ), 35 including but are not limited to, Dulanermin (AMG-951, RhApo2L/TRAIL); Mapatumumab (HRS-ETR1, CAS 658052-09-6); Lexatumumab (HGS-ETR ₂ , CAS 845816-02-6); Apomab (Apomab®); Conatumumab (AMG655, CAS 896731-82-1); and Tigatuzumab(CS1008, CAS 946415-34-5, available from Daiichi Sankyo).

Checkpoint Kinase (CHK) inhibitors include but are not limited to, 7-Hydroxystaurosporine (UCN- 01); 6-Bromo-3-(1-methyl-1H-pyrazol-4-yl)-5-(3R)-3-piperidinylpyr azolo[1,5-a]pyrimidin-7-amine 5 (SCH900776, CAS 891494-63-6); 5-(3-Fluorophenyl)-3-ureidothiophene-2-carboxylic acid N-[(S)- piperidin-3-yl]amide (AZD7762, CAS 860352-01-8); 4-[((3S)-1-Azabicyclo[2.2.2]oct-3-yl)amino]-3-(1H- benzimidazol-2-yl)-6-chloroquinolin-2(1H)-one (CHIR 124, CAS 405168-58-3); 7-Aminodactinomycin (7-AAD), Isogranulatimide, debromohymenialdisine; N-[5-Bromo-4-methyl-2-[(2S)-2- morpholinylmethoxy]-phenyl]-N'-(5-methyl-2-pyrazinyl)urea (LY2603618, CAS 911222-45-2);10 Sulforaphane (CAS 4478-93-7, 4-Methylsulfinylbutyl isothiocyanate); 9,10,11,12-Tetrahydro- 9,12- epoxy-1H-diindolo[1,2,3-fg:3',2',1'-kl]pyrrolo[3,4-i][1,6]be nzodiazocine-1,3(2H)-dione (SB-218078, CAS 135897-06-2); and TAT-S216A (YGRKKRRQRRRLYRSPAMPENL (SEQ ID NO: 33)), and CBP501 ((d-Bpa)sws(d-Phe-F5)(d-Cha)rrrqrr).

In a further embodiment, the compounds of Formula (I), or a pharmaceutically acceptable salt, 15 hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, of the present disclosure are used in combination with one or more immunomodulators (e.g., one or more of an activator of a costimulatory molecule or an inhibitor of an immune checkpoint molecule), for treating a disease, e.g., cancer..

In certain embodiments, the immunomodulator is an activator of a costimulatory molecule. In one embodiment, the agonist of the costimulatory molecule is selected from an agonist (e.g., an agonistic 20 antibody or antigen-binding fragment thereof, or a soluble fusion) of OX40, CD2, CD27, CDS, ICAM-1, LFA-1 (CD11a/CD18), ICOS (CD278), 4-1BB (CD137), GITR, CD30, CD40, BAFFR, HVEM, CD7, LIGHT, NKG2C, SLAMF7, NKp80, CD160, B7-H3 or CD83 ligand.

GITR Agonists

In some embodiments, a GITR agonist is used in combination with a compound of Formula (I), or 25 a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for treating a disease, e.g., cancer. In some embodiments, the GITR agonist is GWN323 (Novartis), BMS-986156, MK- 4166 or MK-1248 (Merck), TRX518 (Leap Therapeutics), INCAGN1876 (Incyte/Agenus), AMG 228 (Amgen) or INBRX-110 (Inhibrx). Exemplary GITR Agonists

30 In one embodiment, the GITR agonist is an anti-GITR antibody molecule. In one embodiment, the GITR agonist is an anti-GITR antibody molecule as described in WO 2016/057846, published on April 14, 2016, entitled“Compositions and Methods of Use for Augmented Immune Response and Cancer Therapy,” incorporated by reference in its entirety.

In one embodiment, the anti-GITR antibody molecule comprises at least one, two, three, four, five 35 or six complementarity determining regions (CDRs) (or collectively all of the CDRs) from a heavy and light chain variable region comprising an amino acid sequence shown in Table 1 (e.g., from the heavy and light chain variable region sequences of MAB7 disclosed in Table 1), or encoded by a nucleotide sequence shown in Table 1. In some embodiments, the CDRs are according to the Kabat definition (e.g., as set out in Table 1). In some embodiments, the CDRs are according to the Chothia definition (e.g., as set out in Table 1). In one embodiment, one or more of the CDRs (or collectively all of the CDRs) have one, two, three, four, five, six or more changes, e.g., amino acid substitutions (e.g., conservative amino acid substitutions) 5 or deletions, relative to an amino acid sequence shown in Table 1, or encoded by a nucleotide sequence shown in Table 1.

In one embodiment, the anti-GITR antibody molecule comprises a heavy chain variable region (VH) comprising a VHCDR1 amino acid sequence of SEQ ID NO: 9, a VHCDR ₂ amino acid sequence of SEQ ID NO: 11, and a VHCDR3 amino acid sequence of SEQ ID NO: 13; and a light chain variable region (VL) 10 comprising a VLCDR1 amino acid sequence of SEQ ID NO: 14, a VLCDR ₂ amino acid sequence of SEQ ID NO: 16, and a VLCDR3 amino acid sequence of SEQ ID NO: 18, each disclosed in Table 1.

In one embodiment, the anti-GITR antibody molecule comprises a VH comprising the amino acid sequence of SEQ ID NO: 1, or an amino acid sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 1. In one embodiment, the anti-GITR antibody molecule comprises a VL comprising the 15 amino acid sequence of SEQ ID NO: 2, or an amino acid sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 2. In one embodiment, the anti-GITR antibody molecule comprises a VH comprising the amino acid sequence of SEQ ID NO: 1 and a VL comprising the amino acid sequence of SEQ ID NO: 2.

In one embodiment, the antibody molecule comprises a VH encoded by the nucleotide sequence of 20 SEQ ID NO: 5, or a nucleotide sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 5. In one embodiment, the antibody molecule comprises a VL encoded by the nucleotide sequence of SEQ ID NO: 6, or a nucleotide sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 6. In one embodiment, the antibody molecule comprises a VH encoded by the nucleotide sequence of SEQ ID NO: 5 and a VL encoded by the nucleotide sequence of SEQ ID NO: 6.

25 In one embodiment, the anti-GITR antibody molecule comprises a heavy chain comprising the amino acid sequence of SEQ ID NO: 3, or an amino acid sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 3. In one embodiment, the anti-GITR antibody molecule comprises a light chain comprising the amino acid sequence of SEQ ID NO: 4, or an amino acid sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 4. In one embodiment, the anti-GITR antibody molecule 30 comprises a heavy chain comprising the amino acid sequence of SEQ ID NO: 3 and a light chain comprising the amino acid sequence of SEQ ID NO: 4.

In one embodiment, the antibody molecule comprises a heavy chain encoded by the nucleotide sequence of SEQ ID NO: 7, or a nucleotide sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 7. In one embodiment, the antibody molecule comprises a light chain encoded by the 35 nucleotide sequence of SEQ ID NO: 8, or a nucleotide sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 8. In one embodiment, the antibody molecule comprises a heavy chain encoded by the nucleotide sequence of SEQ ID NO: 7 and a light chain encoded by the nucleotide sequence of SEQ ID NO: 8.

The antibody molecules described herein can be made by vectors, host cells, and methods described in WO 2016/057846, incorporated by reference in its entirety.

5 Table 1: Amino acid and nucleotide sequences of exemplary anti-GITR antibody molecule

Other Exemplary GITR Agonists

In one embodiment, the anti-GITR antibody molecule is BMS-986156 (Bristol-Myers Squibb), also known as BMS 986156 or BMS986156. BMS-986156 and other anti-GITR antibodies are disclosed, e.g., in US 9,228,016 and WO 2016/196792, incorporated by reference in their entirety. In one embodiment, the 5 anti-GITR antibody molecule comprises one or more of the CDR sequences (or collectively all of the CDR sequences), the heavy chain or light chain variable region sequence, or the heavy chain or light chain sequence of BMS-986156, e.g., as disclosed in Table 2.

In one embodiment, the anti-GITR antibody molecule is MK-4166 or MK-1248 (Merck). MK- 4166, MK-1248, and other anti-GITR antibodies are disclosed, e.g., in US 8,709,424, WO 2011/028683, 10 WO 2015/026684, and Mahne et al. Cancer Res.2017; 77(5):1108-1118, incorporated by reference in their entirety. In one embodiment, the anti-GITR antibody molecule comprises one or more of the CDR sequences (or collectively all of the CDR sequences), the heavy chain or light chain variable region sequence, or the heavy chain or light chain sequence of MK-4166 or MK-1248.

In one embodiment, the anti-GITR antibody molecule is TRX518 (Leap Therapeutics). TRX518 15 and other anti-GITR antibodies are disclosed, e.g., in US 7,812,135, US 8,388,967, US 9,028,823, WO 2006/105021, and Ponte J et al. (2010) Clinical Immunology; 135:S96, incorporated by reference in their entirety. In one embodiment, the anti-GITR antibody molecule comprises one or more of the CDR sequences (or collectively all of the CDR sequences), the heavy chain or light chain variable region sequence, or the heavy chain or light chain sequence of TRX518.

20 In one embodiment, the anti-GITR antibody molecule is INCAGN1876 (Incyte/Agenus).

INCAGN1876 and other anti-GITR antibodies are disclosed, e.g., in US 2015/0368349 and WO 2015/184099, incorporated by reference in their entirety. In one embodiment, the anti-GITR antibody molecule comprises one or more of the CDR sequences (or collectively all of the CDR sequences), the heavy chain or light chain variable region sequence, or the heavy chain or light chain sequence of 25 INCAGN1876.

In one embodiment, the anti-GITR antibody molecule is AMG 228 (Amgen). AMG 228 and other anti-GITR antibodies are disclosed, e.g., in US 9,464,139 and WO 2015/031667, incorporated by reference in their entirety. In one embodiment, the anti-GITR antibody molecule comprises one or more of the CDR sequences (or collectively all of the CDR sequences), the heavy chain or light chain variable region sequence, or the heavy chain or light chain sequence of AMG 228.

In one embodiment, the anti-GITR antibody molecule is INBRX-110 (Inhibrx). INBRX-110 and other anti-GITR antibodies are disclosed, e.g., in US 2017/0022284 and WO 2017/015623, incorporated 5 by reference in their entirety. In one embodiment, the GITR agonist comprises one or more of the CDR sequences (or collectively all of the CDR sequences), the heavy chain or light chain variable region sequence, or the heavy chain or light chain sequence of INBRX-110.

In one embodiment, the GITR agonist (e.g., a fusion protein) is MEDI 1873 (MedImmune), also known as MEDI1873. MEDI 1873 and other GITR agonists are disclosed, e.g., in US 2017/0073386, WO 10 2017/025610, and Ross et al. Cancer Res 2016; 76(14 Suppl): Abstract nr 561, incorporated by reference in their entirety. In one embodiment, the GITR agonist comprises one or more of an IgG Fc domain, a functional multimerization domain, and a receptor binding domain of a glucocorticoid-induced TNF receptor ligand (GITRL) of MEDI 1873.

Further known GITR agonists (e.g., anti-GITR antibodies) include those described, e.g., in WO 15 2016/054638, incorporated by reference in its entirety.

In one embodiment, the anti-GITR antibody is an antibody that competes for binding with, and/or binds to the same epitope on GITR as, one of the anti-GITR antibodies described herein.

In one embodiment, the GITR agonist is a peptide that activates the GITR signaling pathway. In one embodiment, the GITR agonist is an immunoadhesin binding fragment (e.g., an immunoadhesin 20 binding fragment comprising an extracellular or GITR binding portion of GITRL) fused to a constant region (e.g., an Fc region of an immunoglobulin sequence).

Table 2: Amino acid sequence of other exemplary anti-GITR antibody molecules

In certain embodiments, the immunomodulator is an inhibitor of an immune checkpoint molecule. 25 In one embodiment, the immunomodulator is an inhibitor of PD-1, PD-L1, PD-L2, CTLA4, TIM3, LAG3, VISTA, BTLA, TIGIT, LAIR1, CD160, 2B4 and/or TGFRbeta. In one embodiment, the inhibitor of an immune checkpoint molecule inhibits PD-1, PD-L1, LAG-3, TIM-3 or CTLA4, or any combination thereof. The term“inhibition” or“inhibitor” includes a reduction in a certain parameter, e.g., an activity, of a given molecule, e.g., an immune checkpoint inhibitor. For example, inhibition of an activity, e.g., a PD-1 or PD- L1 activity, of at least 5%, 10%, 20%, 30%, 40%, 50% or more is included by this term. Thus, inhibition need not be 100%.

Inhibition of an inhibitory molecule can be performed at the DNA, RNA or protein level. In some embodiments, an inhibitory nucleic acid (e.g., a dsRNA, siRNA or shRNA), can be used to inhibit 5 expression of an inhibitory molecule. In other embodiments, the inhibitor of an inhibitory signal is a polypeptide e.g., a soluble ligand (e.g., PD-1-Ig or CTLA-4 Ig), or an antibody or antigen-binding fragment thereof, that binds to the inhibitory molecule; e.g., an antibody or fragment thereof (also referred to herein as“an antibody molecule”) that binds to PD-1, PD-L1, PD-L2, CTLA4, TIM3, LAG3, VISTA, BTLA, TIGIT, LAIR1, CD160, 2B4 and/or TGFR beta, or a combination thereof.

10 In one embodiment, the antibody molecule is a full antibody or fragment thereof (e.g., a Fab, F(ab')2, Fv, or a single chain Fv fragment (scFv)). In yet other embodiments, the antibody molecule has a heavy chain constant region (Fc) selected from, e.g., the heavy chain constant regions of IgG1, IgG2, IgG3, IgG4, IgM, IgA1, IgA2, IgD, and IgE; particularly, selected from, e.g., the heavy chain constant regions of IgG1, IgG2, IgG3, and IgG4, more particularly, the heavy chain constant region of IgG1 or IgG4 (e.g., human 15 IgG1 or IgG4). In one embodiment, the heavy chain constant region is human IgG1 or human IgG4. In one embodiment, the constant region is altered, e.g., mutated, to modify the properties of the antibody molecule (e.g., to increase or decrease one or more of Fc receptor binding, antibody glycosylation, the number of cysteine residues, effector cell function, or complement function).

In certain embodiments, the antibody molecule is in the form of a bispecific or multispecific 20 antibody molecule. In one embodiment, the bispecific antibody molecule has a first binding specificity to PD-1 or PD-L1 and a second binding specificity, e.g., a second binding specificity to TIM-3, LAG-3, or PD-L2. In one embodiment, the bispecific antibody molecule binds to PD-1 or PD-L1 and TIM-3. In another embodiment, the bispecific antibody molecule binds to PD-1 or PD-L1 and LAG-3. In another embodiment, the bispecific antibody molecule binds to PD-1 and PD-L1. In yet another embodiment, the 25 bispecific antibody molecule binds to PD-1 and PD-L2. In another embodiment, the bispecific antibody molecule binds to TIM-3 and LAG-3. Any combination of the aforesaid molecules can be made in a multispecific antibody molecule, e.g., a trispecific antibody that includes a first binding specificity to PD- 1 or PD-1, and a second and third binding specificities to two or more of TIM-3, LAG-3, or PD-L2.

In certain embodiments, the immunomodulator is an inhibitor of PD-1, e.g., human PD-1. In 30 another embodiment, the immunomodulator is an inhibitor of PD-L1, e.g., human PD-L1. In one embodiment, the inhibitor of PD-1 or PD-L1 is an antibody molecule to PD-1 or PD-L1. The PD-1 or PD- L1 inhibitor can be administered alone, or in combination with other immunomodulators, e.g., in combination with an inhibitor of LAG-3, TIM-3 or CTLA4. In an exemplary embodiment, the inhibitor of PD-1 or PD-L1, e.g., the anti-PD-1 or PD-L1 antibody molecule, is administered in combination with a 35 LAG-3 inhibitor, e.g., an anti-LAG-3 antibody molecule. In another embodiment, the inhibitor of PD-1 or PD-L1, e.g., the anti-PD-1 or PD-L1 antibody molecule, is administered in combination with a TIM-3 inhibitor, e.g., an anti-TIM-3 antibody molecule. In yet other embodiments, the inhibitor of PD-1 or PD- L1, e.g., the anti-PD-1 antibody molecule, is administered in combination with a LAG-3 inhibitor, e.g., an anti-LAG-3 antibody molecule, and a TIM-3 inhibitor, e.g., an anti-TIM-3 antibody molecule.

Other combinations of immunomodulators with a PD-1 inhibitor (e.g., one or more of PD-L2, CTLA4, TIM3, LAG3, VISTA, BTLA, TIGIT, LAIR1, CD160, 2B4 and/or TGFR) are also within the 5 present disclosure. Any of the antibody molecules known in the art or disclosed herein can be used in the aforesaid combinations of inhibitors of checkpoint molecule.

PD-1 inhibitors

In some embodiments, the the compounds of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, of the present disclosure are used in 10 combination with a PD-1 inhibitor to treat a disease, e.g., cancer. In some embodiments, the PD-1 inhibitor is selected from PDR001 (Novartis), Nivolumab (Bristol-Myers Squibb), Pembrolizumab (Merck & Co), Pidilizumab (CureTech), MEDI0680 (Medimmune), REGN2810 (Regeneron), TSR-042 (Tesaro), PF- 06801591 (Pfizer), BGB-A317 (Beigene), BGB-108 (Beigene), INCSHR1210 (Incyte), or AMP-224 (Amplimmune).

15 Exemplary PD-1 Inhibitors

In one embodiment, the PD-1 inhibitor is an anti-PD-1 antibody molecule. In one embodiment, the PD-1 inhibitor is an anti-PD-1 antibody molecule as described in US 2015/0210769, published on July 30, 2015, entitled“Antibody Molecules to PD-1 and Uses Thereof,” incorporated by reference in its entirety.

In one embodiment, the anti-PD-1 antibody molecule comprises at least one, two, three, four, five 20 or six complementarity determining regions (CDRs) (or collectively all of the CDRs) from a heavy and light chain variable region comprising an amino acid sequence shown in Table 3 (e.g., from the heavy and light chain variable region sequences of BAP049-Clone-E or BAP049-Clone-B disclosed in Table 3), or encoded by a nucleotide sequence shown in Table 3. In some embodiments, the CDRs are according to the Kabat definition (e.g., as set out in Table 3). In some embodiments, the CDRs are according to the Chothia 25 definition (e.g., as set out in Table 3). In some embodiments, the CDRs are according to the combined CDR definitions of both Kabat and Chothia (e.g., as set out in Table 3). In one embodiment, the combination of Kabat and Chothia CDR of VH CDR1 comprises the amino acid sequence GYTFTTYWMH (SEQ ID NO: 213). In one embodiment, one or more of the CDRs (or collectively all of the CDRs) have one, two, three, four, five, six or more changes, e.g., amino acid substitutions (e.g., conservative amino acid substitutions) 30 or deletions, relative to an amino acid sequence shown in Table 3, or encoded by a nucleotide sequence shown in Table 3.

In one embodiment, the anti-PD-1 antibody molecule comprises a heavy chain variable region (VH) comprising a VHCDR1 amino acid sequence of SEQ ID NO: 22, a VHCDR ₂ amino acid sequence of SEQ ID NO: 23, and a VHCDR3 amino acid sequence of SEQ ID NO: 24; and a light chain variable region (VL) 35 comprising a VLCDR1 amino acid sequence of SEQ ID NO: 31, a VLCDR ₂ amino acid sequence of SEQ ID NO: 32, and a VLCDR3 amino acid sequence of SEQ ID NO: 286, each disclosed in Table 3. In one embodiment, the antibody molecule comprises a VH comprising a VHCDR1 encoded by the nucleotide sequence of SEQ ID NO: 45, a VHCDR ₂ encoded by the nucleotide sequence of SEQ ID NO: 46, and a VHCDR3 encoded by the nucleotide sequence of SEQ ID NO: 47; and a VL comprising a VLCDR1 encoded by the nucleotide sequence of SEQ ID NO: 50, a VLCDR ₂ encoded by the nucleotide 5 sequence of SEQ ID NO: 51, and a VLCDR3 encoded by the nucleotide sequence of SEQ ID NO: 52, each disclosed in Table 3.

In one embodiment, the anti-PD-1 antibody molecule comprises a VH comprising the amino acid sequence of SEQ ID NO: 27, or an amino acid sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 27. In one embodiment, the anti-PD-1 antibody molecule comprises a VL comprising the 10 amino acid sequence of SEQ ID NO: 41, or an amino acid sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 41. In one embodiment, the anti-PD-1 antibody molecule comprises a VL comprising the amino acid sequence of SEQ ID NO: 37, or an amino acid sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 37. In one embodiment, the anti-PD-1 antibody molecule comprises a VH comprising the amino acid sequence of SEQ ID NO: 27 and a VL comprising the amino 15 acid sequence of SEQ ID NO: 41. In one embodiment, the anti-PD-1 antibody molecule comprises a VH comprising the amino acid sequence of SEQ ID NO: 27 and a VL comprising the amino acid sequence of SEQ ID NO: 37.

In one embodiment, the antibody molecule comprises a VH encoded by the nucleotide sequence of SEQ ID NO: 28, or a nucleotide sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID 20 NO: 28. In one embodiment, the antibody molecule comprises a VL encoded by the nucleotide sequence of SEQ ID NO: 42 or 38, or a nucleotide sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 42 or 38. In one embodiment, the antibody molecule comprises a VH encoded by the nucleotide sequence of SEQ ID NO: 28 and a VL encoded by the nucleotide sequence of SEQ ID NO: 42 or 38.

25 In one embodiment, the anti-PD-1 antibody molecule comprises a heavy chain comprising the amino acid sequence of SEQ ID NO: 29, or an amino acid sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 29. In one embodiment, the anti-PD-1 antibody molecule comprises a light chain comprising the amino acid sequence of SEQ ID NO: 43, or an amino acid sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 43. In one embodiment, the anti-PD-1 antibody 30 molecule comprises a light chain comprising the amino acid sequence of SEQ ID NO: 39, or an amino acid sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 39. In one embodiment, the anti-PD-1 antibody molecule comprises a heavy chain comprising the amino acid sequence of SEQ ID NO: 29 and a light chain comprising the amino acid sequence of SEQ ID NO: 43. In one embodiment, the anti- PD-1 antibody molecule comprises a heavy chain comprising the amino acid sequence of SEQ ID NO: 29 35 and a light chain comprising the amino acid sequence of SEQ ID NO: 39.

In one embodiment, the antibody molecule comprises a heavy chain encoded by the nucleotide sequence of SEQ ID NO: 30, or a nucleotide sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 30. In one embodiment, the antibody molecule comprises a light chain encoded by the nucleotide sequence of SEQ ID NO: 44 or 40, or a nucleotide sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 44 or 40. In one embodiment, the antibody molecule comprises a heavy chain encoded by the nucleotide sequence of SEQ ID NO: 30 and a light chain encoded by the nucleotide 5 sequence of SEQ ID NO: 44 or 40.

The antibody molecules described herein can be made by vectors, host cells, and methods described in US 2015/0210769, incorporated by reference in its entirety.

Table 3. Amino acid and nucleotide sequences of exemplary anti-PD-1 antibody molecules

Other Exemplary PD-1 Inhibitors

In some embodiments, the anti-PD-1 antibody is Nivolumab (CAS Registry Number: 946414-94- 4). Alternative names for Nivolumab include MDX-1106, MDX-1106-04, ONO-4538, BMS-936558 or OPDIVO®. Nivolumab is a fully human IgG4 monoclonal antibody, which specifically blocks PD1. 5 Nivolumab (clone 5C4) and other human monoclonal antibodies that specifically bind to PD1 are disclosed in US Pat No. 8,008,449 and PCT Publication No. WO2006/121168, incorporated by reference in their entirety. In one embodiment, the anti-PD-1 antibody molecule comprises one or more of the CDR sequences (or collectively all of the CDR sequences), the heavy chain or light chain variable region sequence, or the heavy chain or light chain sequence of Nivolumab, e.g., as disclosed in Table 4. In other embodiments, the anti-PD-1 antibody is Pembrolizumab. Pembrolizumab (Trade name KEYTRUDA formerly Lambrolizumab, also known as Merck 3745, MK-3475 or SCH-900475) is a humanized IgG4 monoclonal antibody that binds to PD1. Pembrolizumab is disclosed, e.g., in Hamid, O. et al. (2013) New England Journal of Medicine 369 (2): 134–44, PCT Publication No. WO2009/114335, 5 and US Patent No.8,354,509, incorporated by reference in their entirety. In one embodiment, the anti-PD- 1 antibody molecule comprises one or more of the CDR sequences (or collectively all of the CDR sequences), the heavy chain or light chain variable region sequence, or the heavy chain or light chain sequence of Pembrolizumab, e.g., as disclosed in Table 4.

In some embodiments, the anti-PD-1 antibody is Pidilizumab. Pidilizumab (CT-011; Cure Tech) is 10 a humanized IgG1k monoclonal antibody that binds to PD1. Pidilizumab and other humanized anti-PD-1 monoclonal antibodies are disclosed in PCT Publication No. WO2009/101611, incorporated by reference in their entirety. In one embodiment, the anti-PD-1 antibody molecule comprises one or more of the CDR sequences (or collectively all of the CDR sequences), the heavy chain or light chain variable region sequence, or the heavy chain or light chain sequence of Pidilizumab, e.g., as disclosed in Table 4.

15 Other anti-PD1 antibodies are disclosed in US Patent No. 8,609,089, US Publication No.

2010028330, and/or US Publication No.20120114649, incorporated by reference in their entirety. Other anti-PD1 antibodies include AMP 514 (Amplimmune).

In one embodiment, the anti-PD-1 antibody molecule is MEDI0680 (Medimmune), also known as AMP-514. MEDI0680 and other anti-PD-1 antibodies are disclosed in US 9,205,148 and WO 2012/145493, 20 incorporated by reference in their entirety. In one embodiment, the anti-PD-1 antibody molecule comprises one or more of the CDR sequences (or collectively all of the CDR sequences), the heavy chain or light chain variable region sequence, or the heavy chain or light chain sequence of MEDI0680.

In one embodiment, the anti-PD-1 antibody molecule is REGN2810 (Regeneron). In one embodiment, the anti-PD-1 antibody molecule comprises one or more of the CDR sequences (or 25 collectively all of the CDR sequences), the heavy chain or light chain variable region sequence, or the heavy chain or light chain sequence of REGN2810.

In one embodiment, the anti-PD-1 antibody molecule is PF-06801591 (Pfizer). In one embodiment, the anti-PD-1 antibody molecule comprises one or more of the CDR sequences (or collectively all of the CDR sequences), the heavy chain or light chain variable region sequence, or the heavy chain or light chain 30 sequence of PF-06801591.

In one embodiment, the anti-PD-1 antibody molecule is BGB-A317 or BGB-108 (Beigene). In one embodiment, the anti-PD-1 antibody molecule comprises one or more of the CDR sequences (or collectively all of the CDR sequences), the heavy chain or light chain variable region sequence, or the heavy chain or light chain sequence of BGB-A317 or BGB-108.

35 In one embodiment, the anti-PD-1 antibody molecule is INCSHR1210 (Incyte), also known as INCSHR01210 or SHR-1210. In one embodiment, the anti-PD-1 antibody molecule comprises one or more of the CDR sequences (or collectively all of the CDR sequences), the heavy chain or light chain variable region sequence, or the heavy chain or light chain sequence of INCSHR1210.

In one embodiment, the anti-PD-1 antibody molecule is TSR-042 (Tesaro), also known as ANB011. In one embodiment, the anti-PD-1 antibody molecule comprises one or more of the CDR sequences (or 5 collectively all of the CDR sequences), the heavy chain or light chain variable region sequence, or the heavy chain or light chain sequence of TSR-042.

Further known anti-PD-1 antibodies include those described, e.g., in WO 2015/112800, WO 2016/092419, WO 2015/085847, WO 2014/179664, WO 2014/194302, WO 2014/209804, WO 2015/200119, US 8,735,553, US 7,488,802, US 8,927,697, US 8,993,731, and US 9,102,727, incorporated 10 by reference in their entirety.

In one embodiment, the anti-PD-1 antibody is an antibody that competes for binding with, and/or binds to the same epitope on PD-1 as, one of the anti-PD-1 antibodies described herein.

In one embodiment, the PD-1 inhibitor is a peptide that inhibits the PD-1 signaling pathway, e.g., as described in US 8,907,053, incorporated by reference in its entirety. In some embodiments, the PD-1 15 inhibitor is an immunoadhesin (e.g., an immunoadhesin comprising an extracellular or PD-1 binding portion of PD-L1 or PD-L2 fused to a constant region (e.g., an Fc region of an immunoglobulin sequence). In some embodiments, the PD-1 inhibitor is AMP-224 (B7-DCIg (Amplimmune), e.g., disclosed in WO 2010/027827 and WO 2011/066342, incorporated by reference in their entirety).

Table 4. Amino acid sequences of other exemplary anti-PD-1 antibody molecules

PD-L1 Inhibitors

In some embodiments, the compounds of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, of the present disclosure are used in combination with a PD-L1 inhibitor for treating a disease, e.g., cancer. In some embodiments, the PD-L1 inhibitor is selected from FAZ053 (Novartis), Atezolizumab (Genentech/Roche), Avelumab (Merck Serono and Pfizer), Durvalumab (MedImmune/AstraZeneca), or BMS-936559 (Bristol-Myers Squibb).

Exemplary PD-L1 Inhibitors

5 In one embodiment, the PD-L1 inhibitor is an anti-PD-L1 antibody molecule. In one embodiment, the PD-L1 inhibitor is an anti-PD-L1 antibody molecule as disclosed in US 2016/0108123, published on April 21, 2016, entitled“Antibody Molecules to PD-L1 and Uses Thereof,” incorporated by reference in its entirety.

In one embodiment, the anti-PD-L1 antibody molecule comprises at least one, two, three, four, five 10 or six complementarity determining regions (CDRs) (or collectively all of the CDRs) from a heavy and light chain variable region comprising an amino acid sequence shown in Table 5 (e.g., from the heavy and light chain variable region sequences of BAP058-Clone O or BAP058-Clone N disclosed in Table 5), or encoded by a nucleotide sequence shown in Table 5. In some embodiments, the CDRs are according to the Kabat definition (e.g., as set out in Table 5). In some embodiments, the CDRs are according to the Chothia 15 definition (e.g., as set out in Table 5). In some embodiments, the CDRs are according to the combined CDR definitions of both Kabat and Chothia (e.g., as set out in Table 5). In one embodiment, the combination of Kabat and Chothia CDR of VH CDR1 comprises the amino acid sequence GYTFTSYWMY (SEQ ID NO: 214). In one embodiment, one or more of the CDRs (or collectively all of the CDRs) have one, two, three, four, five, six or more changes, e.g., amino acid substitutions (e.g., conservative amino acid substitutions) 20 or deletions, relative to an amino acid sequence shown in Table 5, or encoded by a nucleotide sequence shown in Table 5.

In one embodiment, the anti-PD-L1 antibody molecule comprises a heavy chain variable region (VH) comprising a VHCDR1 amino acid sequence of SEQ ID NO: 62, a VHCDR ₂ amino acid sequence of SEQ ID NO: 63, and a VHCDR3 amino acid sequence of SEQ ID NO: 64; and a light chain variable 25 region (VL) comprising a VLCDR1 amino acid sequence of SEQ ID NO: 70, a VLCDR ₂ amino acid sequence of SEQ ID NO: 71, and a VLCDR3 amino acid sequence of SEQ ID NO: 72, each disclosed in Table 5.

In one embodiment, the anti-PD-L1 antibody molecule comprises a VH comprising a VHCDR1 encoded by the nucleotide sequence of SEQ ID NO: 89, a VHCDR ₂ encoded by the nucleotide sequence 30 of SEQ ID NO: 90, and a VHCDR3 encoded by the nucleotide sequence of SEQ ID NO: 91; and a VL comprising a VLCDR1 encoded by the nucleotide sequence of SEQ ID NO: 94, a VLCDR ₂ encoded by the nucleotide sequence of SEQ ID NO: 95, and a VLCDR3 encoded by the nucleotide sequence of SEQ ID NO: 96, each disclosed in Table 5.

In one embodiment, the anti-PD-L1 antibody molecule comprises a VH comprising the amino acid 35 sequence of SEQ ID NO: 67, or an amino acid sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 67. In one embodiment, the anti-PD-L1 antibody molecule comprises a VL comprising the amino acid sequence of SEQ ID NO: 77, or an amino acid sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 77. In one embodiment, the anti-PD-L1 antibody molecule comprises a VH comprising the amino acid sequence of SEQ ID NO: 81, or an amino acid sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 81. In one embodiment, the anti-PD-L1 antibody molecule comprises a VL comprising the amino acid sequence of SEQ ID NO: 85, or an amino acid sequence at least 5 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 85. In one embodiment, the anti-PD-L1 antibody molecule comprises a VH comprising the amino acid sequence of SEQ ID NO: 67 and a VL comprising the amino acid sequence of SEQ ID NO: 77. In one embodiment, the anti-PD-L1 antibody molecule comprises a VH comprising the amino acid sequence of SEQ ID NO: 81 and a VL comprising the amino acid sequence of SEQ ID NO: 85.

10 In one embodiment, the antibody molecule comprises a VH encoded by the nucleotide sequence of SEQ ID NO: 68, or a nucleotide sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 68. In one embodiment, the antibody molecule comprises a VL encoded by the nucleotide sequence of SEQ ID NO: 78, or a nucleotide sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 78. In one embodiment, the antibody molecule comprises a VH encoded by the nucleotide sequence 15 of SEQ ID NO: 82, or a nucleotide sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 82. In one embodiment, the antibody molecule comprises a VL encoded by the nucleotide sequence of SEQ ID NO: 86, or a nucleotide sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 86. In one embodiment, the antibody molecule comprises a VH encoded by the nucleotide sequence of SEQ ID NO: 68 and a VL encoded by the nucleotide sequence of SEQ ID NO: 78. In one embodiment, 20 the antibody molecule comprises a VH encoded by the nucleotide sequence of SEQ ID NO: 82 and a VL encoded by the nucleotide sequence of SEQ ID NO: 86.

In one embodiment, the anti-PD-L1 antibody molecule comprises a heavy chain comprising the amino acid sequence of SEQ ID NO: 69, or an amino acid sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 69. In one embodiment, the anti-PD-L1 antibody molecule comprises a 25 light chain comprising the amino acid sequence of SEQ ID NO: 79, or an amino acid sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 79. In one embodiment, the anti-PD-L1 antibody molecule comprises a heavy chain comprising the amino acid sequence of SEQ ID NO: 83, or an amino acid sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 83. In one embodiment, the anti-PD-L1 antibody molecule comprises a light chain comprising the amino acid sequence of SEQ ID 30 NO: 87, or an amino acid sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 87.

In one embodiment, the anti-PD-L1 antibody molecule comprises a heavy chain comprising the amino acid sequence of SEQ ID NO: 69 and a light chain comprising the amino acid sequence of SEQ ID NO: 79. In one embodiment, the anti-PD-L1 antibody molecule comprises a heavy chain comprising the amino acid sequence of SEQ ID NO: 83 and a light chain comprising the amino acid sequence of SEQ ID NO: 87. 35 In one embodiment, the antibody molecule comprises a heavy chain encoded by the nucleotide sequence of SEQ ID NO: 76, or a nucleotide sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 76. In one embodiment, the antibody molecule comprises a light chain encoded by the nucleotide sequence of SEQ ID NO: 80, or a nucleotide sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 80. In one embodiment, the antibody molecule comprises a heavy chain encoded by the nucleotide sequence of SEQ ID NO: 84, or a nucleotide sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 84. In one embodiment, the antibody molecule comprises a light chain 5 encoded by the nucleotide sequence of SEQ ID NO: 88, or a nucleotide sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 88. In one embodiment, the antibody molecule comprises a heavy chain encoded by the nucleotide sequence of SEQ ID NO: 76 and a light chain encoded by the nucleotide sequence of SEQ ID NO: 80. In one embodiment, the antibody molecule comprises a heavy chain encoded by the nucleotide sequence of SEQ ID NO: 84 and a light chain encoded by the nucleotide 10 sequence of SEQ ID NO: 88.

The antibody molecules described herein can be made by vectors, host cells, and methods described in US 2016/0108123, incorporated by reference in its entirety.

Table 5. Amino acid and nucleotide sequences of exemplary anti-PD-L1 antibody molecules

In some embodiments, the PD-L1 inhibitor is anti-PD-L1 antibody. In some embodiments, the anti- PD-L1 inhibitor is selected from YW243.55.S70, MPDL3280A, MEDI-4736, or MDX-1105MSB- 0010718C (also referred to as A09-246-2) disclosed in, e.g., WO 2013/0179174, and having a sequence 5 disclosed herein (or a sequence substantially identical or similar thereto, e.g., a sequence at least 85%, 90%, 95% identical or higher to the sequence specified).

In one embodiment, the PD-L1 inhibitor is MDX-1105. MDX-1105, also known as BMS-936559, is an anti-PD-L1 antibody described in PCT Publication No. WO 2007/005874.

In one embodiment, the PD-L1 inhibitor is YW243.55.S70. The YW243.55.S70 antibody is an 10 anti-PD-L1 described in PCT Publication No. WO 2010/077634.

In one embodiment, the PD-L1 inhibitor is MDPL3280A (Genentech / Roche) also known as Atezolizumabm, RG7446, RO5541267, YW243.55.S70, or TECENTRIQ™. MDPL3280A is a human Fc optimized IgG1 monoclonal antibody that binds to PD-L1. MDPL3280A and other human monoclonal antibodies to PD-L1 are disclosed in U.S. Patent No.: 7,943,743 and U.S Publication No.: 20120039906 15 incorporated by reference in its entirety. In one embodiment, the anti-PD-L1 antibody molecule comprises one or more of the CDR sequences (or collectively all of the CDR sequences), the heavy chain or light chain variable region sequence, or the heavy chain or light chain sequence of Atezolizumab, e.g., as disclosed in Table 6.

In other embodiments, the PD-L2 inhibitor is AMP-224. AMP-224 is a PD-L2 Fc fusion soluble 20 receptor that blocks the interaction between PD1 and B7-H1 (B7-DCIg; Amplimmune; e.g., disclosed in PCT Publication Nos. WO2010/027827 and WO2011/066342).

In one embodiment, the PD-L1 inhibitor is an anti-PD-L1 antibody molecule. In one embodiment, the anti-PD-L1 antibody molecule is Avelumab (Merck Serono and Pfizer), also known as MSB0010718C. Avelumab and other anti-PD-L1 antibodies are disclosed in WO 2013/079174, incorporated by reference 25 in its entirety. In one embodiment, the anti-PD-L1 antibody molecule comprises one or more of the CDR sequences (or collectively all of the CDR sequences), the heavy chain or light chain variable region sequence, or the heavy chain or light chain sequence of Avelumab, e.g., as disclosed in Table 6.

In one embodiment, the anti-PD-L1 antibody molecule is Durvalumab (MedImmune/AstraZeneca), also known as MEDI4736. Durvalumab and other anti-PD-L1 antibodies are disclosed in US 8,779,108, 30 incorporated by reference in its entirety. In one embodiment, the anti-PD-L1 antibody molecule comprises one or more of the CDR sequences (or collectively all of the CDR sequences), the heavy chain or light chain variable region sequence, or the heavy chain or light chain sequence of Durvalumab, e.g., as disclosed in Table 6. In one embodiment, the anti-PD-L1 antibody molecule is BMS-936559 (Bristol-Myers Squibb), also known as MDX-1105 or 12A4. BMS-936559 and other anti-PD-L1 antibodies are disclosed in US 7,943,743 and WO 2015/081158, incorporated by reference in their entirety. In one embodiment, the anti- PD-L1 antibody molecule comprises one or more of the CDR sequences (or collectively all of the CDR 5 sequences), the heavy chain or light chain variable region sequence, or the heavy chain or light chain sequence of BMS-936559, e.g., as disclosed in Table 6.

Further known anti-PD-L1 antibodies include those described, e.g., in WO 2015/181342, WO 2014/100079, WO 2016/000619, WO 2014/022758, WO 2014/055897, WO 2015/061668, WO 2013/079174, WO 2012/145493, WO 2015/112805, WO 2015/109124, WO 2015/195163, US 8,168,179, 10 US 8,552,154, US 8,460,927, and US 9,175,082, incorporated by reference in their entirety.

In one embodiment, the anti-PD-L1 antibody is an antibody that competes for binding with, and/or binds to the same epitope on PD-L1 as, one of the anti-PD-L1 antibodies described herein.

Table 6. Amino acid sequences of other exemplary anti-PD-L1 antibody molecules

LAG-3 Inhibitors

In some embodiments, the compounds of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, of the present disclosure are used in combination with a LAG-3 inhibitor to treat a disease, e.g., cancer. In some embodiments, the LAG-3 inhibitor is selected from LAG525 (Novartis), BMS-986016 (Bristol-Myers Squibb), or TSR-033 (Tesaro). Exemplary LAG-3 Inhibitors

In one embodiment, the LAG-3 inhibitor is an anti-LAG-3 antibody molecule. In one embodiment, 5 the LAG-3 inhibitor is an anti-LAG-3 antibody molecule as disclosed in US 2015/0259420, published on September 17, 2015, entitled“Antibody Molecules to LAG-3 and Uses Thereof,” incorporated by reference in its entirety.

In one embodiment, the anti-LAG-3 antibody molecule comprises at least one, two, three, four, five or six complementarity determining regions (CDRs) (or collectively all of the CDRs) from a heavy and 10 light chain variable region comprising an amino acid sequence shown in Table 7 (e.g., from the heavy and light chain variable region sequences of BAP050-Clone I or BAP050-Clone J disclosed in Table 7), or encoded by a nucleotide sequence shown in Table 7. In some embodiments, the CDRs are according to the Kabat definition (e.g., as set out in Table 7). In some embodiments, the CDRs are according to the Chothia definition (e.g., as set out in Table 7). In some embodiments, the CDRs are according to the combined CDR 15 definitions of both Kabat and Chothia (e.g., as set out in Table 7). In one embodiment, the combination of Kabat and Chothia CDR of VH CDR1 comprises the amino acid sequence GFTLTNYGMN (SEQ ID NO: 173). In one embodiment, one or more of the CDRs (or collectively all of the CDRs) have one, two, three, four, five, six or more changes, e.g., amino acid substitutions (e.g., conservative amino acid substitutions) or deletions, relative to an amino acid sequence shown in Table 7, or encoded by a nucleotide sequence 20 shown in Table 7.

In one embodiment, the anti-LAG-3 antibody molecule comprises a heavy chain variable region (VH) comprising a VHCDR1 amino acid sequence of SEQ ID NO: 108, a VHCDR ₂ amino acid sequence of SEQ ID NO: 109, and a VHCDR3 amino acid sequence of SEQ ID NO: 110; and a light chain variable region (VL) comprising a VLCDR1 amino acid sequence of SEQ ID NO: 117, a VLCDR ₂ amino acid 25 sequence of SEQ ID NO: 118, and a VLCDR3 amino acid sequence of SEQ ID NO: 119, each disclosed in Table 7.

In one embodiment, the anti-LAG-3 antibody molecule comprises a VH comprising a VHCDR1 encoded by the nucleotide sequence of SEQ ID NO: 143 or 144, a VHCDR ₂ encoded by the nucleotide sequence of SEQ ID NO: 145 or 146, and a VHCDR3 encoded by the nucleotide sequence of SEQ ID NO: 30 147 or 148; and a VL comprising a VLCDR1 encoded by the nucleotide sequence of SEQ ID NO: 153 or 154, a VLCDR ₂ encoded by the nucleotide sequence of SEQ ID NO: 155 or 156, and a VLCDR3 encoded by the nucleotide sequence of SEQ ID NO: 157 or 158, each disclosed in Table 7. In one embodiment, the anti-LAG-3 antibody molecule comprises a VH comprising a VHCDR1 encoded by the nucleotide sequence of SEQ ID NO: 165 or 144, a VHCDR ₂ encoded by the nucleotide sequence of SEQ ID NO: 166 35 or 146, and a VHCDR3 encoded by the nucleotide sequence of SEQ ID NO: 167 or 148; and a VL comprising a VLCDR1 encoded by the nucleotide sequence of SEQ ID NO: 153 or 154, a VLCDR ₂ encoded by the nucleotide sequence of SEQ ID NO: 155 or 156, and a VLCDR3 encoded by the nucleotide sequence of SEQ ID NO: 157 or 158, each disclosed in Table 7.

In one embodiment, the anti-LAG-3 antibody molecule comprises a VH comprising the amino acid sequence of SEQ ID NO: 113, or an amino acid sequence at least 85%, 90%, 95%, or 99% identical or 5 higher to SEQ ID NO: 113. In one embodiment, the anti-LAG-3 antibody molecule comprises a VL comprising the amino acid sequence of SEQ ID NO: 125, or an amino acid sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 125. In one embodiment, the anti-LAG-3 antibody molecule comprises a VH comprising the amino acid sequence of SEQ ID NO: 131, or an amino acid sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 131. In one embodiment, the 10 anti-LAG-3 antibody molecule comprises a VL comprising the amino acid sequence of SEQ ID NO: 137, or an amino acid sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 137. In one embodiment, the anti-LAG-3 antibody molecule comprises a VH comprising the amino acid sequence of SEQ ID NO: 113 and a VL comprising the amino acid sequence of SEQ ID NO: 125. In one embodiment, the anti-LAG-3 antibody molecule comprises a VH comprising the amino acid sequence of SEQ ID NO: 15 131 and a VL comprising the amino acid sequence of SEQ ID NO: 137.

In one embodiment, the antibody molecule comprises a VH encoded by the nucleotide sequence of SEQ ID NO: 114 or 115, or a nucleotide sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 114 or 115. In one embodiment, the antibody molecule comprises a VL encoded by the nucleotide sequence of SEQ ID NO: 126 or 127, or a nucleotide sequence at least 85%, 90%, 95%, or 99% 20 identical or higher to SEQ ID NO: 126 or 127. In one embodiment, the antibody molecule comprises a VH encoded by the nucleotide sequence of SEQ ID NO: 132 or 133, or a nucleotide sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 132 or 133. In one embodiment, the antibody molecule comprises a VL encoded by the nucleotide sequence of SEQ ID NO: 138 or 139, or a nucleotide sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 138 or 139. In one 25 embodiment, the antibody molecule comprises a VH encoded by the nucleotide sequence of SEQ ID NO:

114 or 115 and a VL encoded by the nucleotide sequence of SEQ ID NO: 126 or 127. In one embodiment, the antibody molecule comprises a VH encoded by the nucleotide sequence of SEQ ID NO: 132 or 133 and a VL encoded by the nucleotide sequence of SEQ ID NO: 138 or 139.

In one embodiment, the anti-LAG-3 antibody molecule comprises a heavy chain comprising the 30 amino acid sequence of SEQ ID NO: 116, or an amino acid sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 116. In one embodiment, the anti-LAG-3 antibody molecule comprises a light chain comprising the amino acid sequence of SEQ ID NO: 128, or an amino acid sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 128. In one embodiment, the anti-LAG-3 antibody molecule comprises a heavy chain comprising the amino acid sequence of SEQ ID NO: 134, or 35 an amino acid sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 134. In one embodiment, the anti-LAG-3 antibody molecule comprises a light chain comprising the amino acid sequence of SEQ ID NO: 140, or an amino acid sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 140. In one embodiment, the anti-LAG-3 antibody molecule comprises a heavy chain comprising the amino acid sequence of SEQ ID NO: 116 and a light chain comprising the amino acid sequence of SEQ ID NO: 128. In one embodiment, the anti-LAG-3 antibody molecule comprises a heavy chain comprising the amino acid sequence of SEQ ID NO: 134 and a light chain comprising the amino acid 5 sequence of SEQ ID NO: 140.

In one embodiment, the antibody molecule comprises a heavy chain encoded by the nucleotide sequence of SEQ ID NO: 123 or 124, or a nucleotide sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 123 or 124. In one embodiment, the antibody molecule comprises a light chain encoded by the nucleotide sequence of SEQ ID NO: 129 or 130, or a nucleotide sequence at least 85%, 10 90%, 95%, or 99% identical or higher to SEQ ID NO: 129 or 130. In one embodiment, the antibody molecule comprises a heavy chain encoded by the nucleotide sequence of SEQ ID NO: 135 or 136, or a nucleotide sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 135 or 136. In one embodiment, the antibody molecule comprises a light chain encoded by the nucleotide sequence of SEQ ID NO: 141 or 142, or a nucleotide sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ 15 ID NO: 141 or 142. In one embodiment, the antibody molecule comprises a heavy chain encoded by the nucleotide sequence of SEQ ID NO: 123 or 124 and a light chain encoded by the nucleotide sequence of SEQ ID NO: 129 or 130. In one embodiment, the antibody molecule comprises a heavy chain encoded by the nucleotide sequence of SEQ ID NO: 135 or 136 and a light chain encoded by the nucleotide sequence of SEQ ID NO: 141 or 142.

20 The antibody molecules described herein can be made by vectors, host cells, and methods described in US 2015/0259420, incorporated by reference in its entirety.

Table 7. Amino acid and nucleotide sequences of exemplary anti-LAG-3 antibody molecules

and other anti-LAG-3 antibodies are disclosed in WO 2015/116539 and US 9,505,839, incorporated by reference in their entirety. In one embodiment, the anti-LAG-3 antibody molecule comprises one or more of the CDR sequences (or collectively all of the CDR sequences), the heavy chain or light chain variable region sequence, or the heavy chain or light chain sequence of BMS-986016, e.g., as disclosed in Table 8. 5 In one embodiment, the anti-LAG-3 antibody molecule is TSR-033 (Tesaro). In one embodiment, the anti-LAG-3 antibody molecule comprises one or more of the CDR sequences (or collectively all of the CDR sequences), the heavy chain or light chain variable region sequence, or the heavy chain or light chain sequence of TSR-033.

In one embodiment, the anti-LAG-3 antibody molecule is IMP731 or GSK2831781 (GSK and 10 Prima BioMed). IMP731 and other anti-LAG-3 antibodies are disclosed in WO 2008/132601 and US 9,244,059, incorporated by reference in their entirety. In one embodiment, the anti-LAG-3 antibody molecule comprises one or more of the CDR sequences (or collectively all of the CDR sequences), the heavy chain or light chain variable region sequence, or the heavy chain or light chain sequence of IMP731, e.g., as disclosed in Table 8. In one embodiment, the anti-LAG-3 antibody molecule comprises one or more 15 of the CDR sequences (or collectively all of the CDR sequences), the heavy chain or light chain variable region sequence, or the heavy chain or light chain sequence of GSK2831781.

In one embodiment, the anti-LAG-3 antibody molecule is IMP761 (Prima BioMed). In one embodiment, the anti-LAG-3 antibody molecule comprises one or more of the CDR sequences (or collectively all of the CDR sequences), the heavy chain or light chain variable region sequence, or the heavy 20 chain or light chain sequence of IMP761.

Further known anti-LAG-3 antibodies include those described, e.g., in WO 2008/132601, WO 2010/019570, WO 2014/140180, WO 2015/116539, WO 2015/200119, WO 2016/028672, US 9,244,059, US 9,505,839, incorporated by reference in their entirety.

In one embodiment, the anti-LAG-3 antibody is an antibody that competes for binding with, and/or 25 binds to the same epitope on LAG-3 as, one of the anti-LAG-3 antibodies described herein.

In one embodiment, the anti-LAG-3 inhibitor is a soluble LAG-3 protein, e.g., IMP321 (Prima BioMed), e.g., as disclosed in WO 2009/044273, incorporated by reference in its entirety.

Table 8. Amino acid sequences of other exemplary anti-LAG-3 antibody molecules

TIM-3 Inhibitors

In certain embodiments, the inhibitor of an immune checkpoint molecule is an inhibitor of TIM-3. In some embodiments, the compounds of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, of the present disclosure are used in combination with 5 a TIM-3 inhibitor to treat a disease, e.g., cancer. In some embodiments, the TIM-3 inhibitor is MGB453 (Novartis) or TSR-022 (Tesaro).

Exemplary TIM-3 Inhibitors

In one embodiment, the TIM-3 inhibitor is an anti-TIM-3 antibody molecule. In one embodiment, the TIM-3 inhibitor is an anti-TIM-3 antibody molecule as disclosed in US 2015/0218274, published on 10 August 6, 2015, entitled“Antibody Molecules to TIM-3 and Uses Thereof,” incorporated by reference in its entirety.

In one embodiment, the anti-TIM-3 antibody molecule comprises at least one, two, three, four, five or six complementarity determining regions (CDRs) (or collectively all of the CDRs) from a heavy and light chain variable region comprising an amino acid sequence shown in Table 9 (e.g., from the heavy and light chain variable region sequences of ABTIM3-hum11 or ABTIM3-hum03 disclosed in Table 9), or encoded by a nucleotide sequence shown in Table 9. In some embodiments, the CDRs are according to the Kabat definition (e.g., as set out in Table 9). In some embodiments, the CDRs are according to the Chothia definition (e.g., as set out in Table 9). In one embodiment, one or more of the CDRs (or collectively all of 5 the CDRs) have one, two, three, four, five, six or more changes, e.g., amino acid substitutions (e.g., conservative amino acid substitutions) or deletions, relative to an amino acid sequence shown in Table 9, or encoded by a nucleotide sequence shown in Table 9.

In one embodiment, the anti-TIM-3 antibody molecule comprises a heavy chain variable region (VH) comprising a VHCDR1 amino acid sequence of SEQ ID NO: 174, a VHCDR ₂ amino acid sequence 10 of SEQ ID NO: 175, and a VHCDR3 amino acid sequence of SEQ ID NO: 176; and a light chain variable region (VL) comprising a VLCDR1 amino acid sequence of SEQ ID NO: 183, a VLCDR ₂ amino acid sequence of SEQ ID NO: 184, and a VLCDR3 amino acid sequence of SEQ ID NO: 185, each disclosed in Table 9. In one embodiment, the anti-TIM-3 antibody molecule comprises a heavy chain variable region (VH) comprising a VHCDR1 amino acid sequence of SEQ ID NO: 174, a VHCDR ₂ amino acid sequence 15 of SEQ ID NO: 193, and a VHCDR3 amino acid sequence of SEQ ID NO: 176; and a light chain variable region (VL) comprising a VLCDR1 amino acid sequence of SEQ ID NO: 183, a VLCDR ₂ amino acid sequence of SEQ ID NO: 184, and a VLCDR3 amino acid sequence of SEQ ID NO: 185, each disclosed in Table 9.

In one embodiment, the anti-TIM-3 antibody molecule comprises a VH comprising the amino acid 20 sequence of SEQ ID NO: 179, or an amino acid sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 179. In one embodiment, the anti-TIM-3 antibody molecule comprises a VL comprising the amino acid sequence of SEQ ID NO: 189, or an amino acid sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 189. In one embodiment, the anti-TIM-3 antibody molecule comprises a VH comprising the amino acid sequence of SEQ ID NO: 195, or an amino acid sequence at 25 least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 195. In one embodiment, the anti-TIM-3 antibody molecule comprises a VL comprising the amino acid sequence of SEQ ID NO: 199, or an amino acid sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 199. In one embodiment, the anti-TIM-3 antibody molecule comprises a VH comprising the amino acid sequence of SEQ ID NO: 179 and a VL comprising the amino acid sequence of SEQ ID NO: 189. In one embodiment, the anti-TIM- 30 3 antibody molecule comprises a VH comprising the amino acid sequence of SEQ ID NO: 195 and a VL comprising the amino acid sequence of SEQ ID NO: 199.

In one embodiment, the antibody molecule comprises a VH encoded by the nucleotide sequence of SEQ ID NO: 180, or a nucleotide sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 180. In one embodiment, the antibody molecule comprises a VL encoded by the nucleotide sequence 35 of SEQ ID NO: 190, or a nucleotide sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 190. In one embodiment, the antibody molecule comprises a VH encoded by the nucleotide sequence of SEQ ID NO: 196, or a nucleotide sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 196. In one embodiment, the antibody molecule comprises a VL encoded by the nucleotide sequence of SEQ ID NO: 200, or a nucleotide sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 200. In one embodiment, the antibody molecule comprises a VH encoded by the nucleotide sequence of SEQ ID NO: 180 and a VL encoded by the nucleotide sequence of SEQ ID NO: 190. In one 5 embodiment, the antibody molecule comprises a VH encoded by the nucleotide sequence of SEQ ID NO:

196 and a VL encoded by the nucleotide sequence of SEQ ID NO: 200.

In one embodiment, the anti-TIM-3 antibody molecule comprises a heavy chain comprising the amino acid sequence of SEQ ID NO: 181, or an amino acid sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 181. In one embodiment, the anti-TIM-3 antibody molecule comprises 10 a light chain comprising the amino acid sequence of SEQ ID NO: 191, or an amino acid sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 191. In one embodiment, the anti-TIM-3 antibody molecule comprises a heavy chain comprising the amino acid sequence of SEQ ID NO: 197, or an amino acid sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 197. In one embodiment, the anti-TIM-3 antibody molecule comprises a light chain comprising the amino acid 15 sequence of SEQ ID NO: 201, or an amino acid sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 201. In one embodiment, the anti-TIM-3 antibody molecule comprises a heavy chain comprising the amino acid sequence of SEQ ID NO: 181 and a light chain comprising the amino acid sequence of SEQ ID NO: 191. In one embodiment, the anti-TIM-3 antibody molecule comprises a heavy chain comprising the amino acid sequence of SEQ ID NO: 197 and a light chain comprising the amino acid 20 sequence of SEQ ID NO: 201.

In one embodiment, the antibody molecule comprises a heavy chain encoded by the nucleotide sequence of SEQ ID NO: 182, or a nucleotide sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 182. In one embodiment, the antibody molecule comprises a light chain encoded by the nucleotide sequence of SEQ ID NO: 192, or a nucleotide sequence at least 85%, 90%, 95%, or 99% identical 25 or higher to SEQ ID NO: 192. In one embodiment, the antibody molecule comprises a heavy chain encoded by the nucleotide sequence of SEQ ID NO: 198, or a nucleotide sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 198. In one embodiment, the antibody molecule comprises a light chain encoded by the nucleotide sequence of SEQ ID NO: 202, or a nucleotide sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 202. In one embodiment, the antibody molecule comprises a 30 heavy chain encoded by the nucleotide sequence of SEQ ID NO: 182 and a light chain encoded by the nucleotide sequence of SEQ ID NO: 192. In one embodiment, the antibody molecule comprises a heavy chain encoded by the nucleotide sequence of SEQ ID NO: 198 and a light chain encoded by the nucleotide sequence of SEQ ID NO: 202.

The antibody molecules described herein can be made by vectors, host cells, and methods described 35 in US 2015/0218274, incorporated by reference in its entirety.

Other Exemplary TIM-3 Inhibitors

In one embodiment, the anti-TIM-3 antibody molecule is TSR-022 (AnaptysBio/Tesaro). In one embodiment, the anti-TIM-3 antibody molecule comprises one or more of the CDR sequences (or collectively all of the CDR sequences), the heavy chain or light chain variable region sequence, or the heavy 5 chain or light chain sequence of TSR-022. In one embodiment, the anti-TIM-3 antibody molecule comprises one or more of the CDR sequences (or collectively all of the CDR sequences), the heavy chain or light chain variable region sequence, or the heavy chain or light chain sequence of APE5137 or APE5121, e.g., as disclosed in Table 10. APE5137, APE5121, and other anti-TIM-3 antibodies are disclosed in WO 2016/161270, incorporated by reference in its entirety.

10 In one embodiment, the anti-TIM-3 antibody molecule is the antibody clone F38-2E2. In one embodiment, the anti-TIM-3 antibody molecule comprises one or more of the CDR sequences (or collectively all of the CDR sequences), the heavy chain or light chain variable region sequence, or the heavy chain or light chain sequence of F38-2E2.

Further known anti-TIM-3 antibodies include those described, e.g., in WO 2016/111947, WO 15 2016/071448, WO 2016/144803, US 8,552,156, US 8,841,418, and US 9,163,087, incorporated by reference in their entirety.

In one embodiment, the anti-TIM-3 antibody is an antibody that competes for binding with, and/or binds to the same epitope on TIM-3 as, one of the anti-TIM-3 antibodies described herein.

Table 10. Amino acid sequences of other exemplary anti-TIM-3 antibody molecules

Cytokines

In yet another embodiment, the compounds of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, of the present disclosure are used in combination with one or more cytokines, including but not limited to, interferon, IL-2, IL-15, IL-7, or IL21. 5 In certain embodiments, compounds of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, are administered in combination with an IL-15/IL-15Ra complex. In some embodiments, the IL-15/IL-15Ra complex is selected from NIZ985 (Novartis), ATL-803 (Altor) or CYP0150 (Cytune).

Exemplary IL-15/IL-15Ra complexes

10 In one embodiment, the cytokine is IL-15 complexed with a soluble form of IL-15 receptor alpha (IL-15Ra). The IL-15/IL-15Ra complex may comprise IL-15 covalently or noncovalently bound to a soluble form of IL-15Ra. In a particular embodiment, the human IL-15 is noncovalently bonded to a soluble form of IL-15Ra. In a particular embodiment, the human IL-15 of the formulation comprises an amino acid sequence of SEQ ID NO: 207 in Table 11 or an amino acid sequence at least 85%, 90%, 95%, or 99% 15 identical or higher to SEQ ID NO: 207, and the soluble form of human IL-15Ra comprises an amino acid sequence of SEQ ID NO: 208 in Table 11, or an amino acid sequence at least 85%, 90%, 95%, or 99% identical or higher to SEQ ID NO: 208, as described in WO 2014/066527, incorporated by reference in its entirety. The molecules described herein can be made by vectors, host cells, and methods described in WO 2007084342, incorporated by reference in its entirety.

20 Table 11. Amino acid and nucleotide sequences of exemplary IL-15/IL-15Ra complexes

Other exemplary IL-15/IL-15Ra complexes

In one embodiment, the IL-15/IL-15Ra complex is ALT-803, an IL-15/IL-15Ra Fc fusion protein (IL-15N72D:IL-15RaSu/Fc soluble complex). ALT-803 is described in WO 2008/143794, incorporated by reference in its entirety. In one embodiment, the IL-15/IL-15Ra Fc fusion protein comprises the sequences 5 as disclosed in Table 12.

In one embodiment, the IL-15/IL-15Ra complex comprises IL-15 fused to the sushi domain of IL- 15Ra (CYP0150, Cytune). The sushi domain of IL-15Ra refers to a domain beginning at the first cysteine residue after the signal peptide of IL-15Ra, and ending at the fourth cysteine residue after said signal peptide. The complex of IL-15 fused to the sushi domain of IL-15Ra is described in WO 2007/04606 and WO 10 2012/175222, incorporated by reference in their entirety. In one embodiment, the IL-15/IL-15Ra sushi domain fusion comprises the sequences as disclosed in Table 12.

Table 12. Amino acid sequences of other exemplary IL-15/IL-15Ra complexes

In yet another embodiment, the compounds of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, of the present disclosure are used in combination with one or more agonists of toll like receptors (TLRs, e.g., TLR7, TLR8, TLR9) to treat a disease, e.g., cancer. In some embodiments, a compound of the present disclosure can be used in 5 combination with a TLR7 agonist or a TLR7 agonist conjugate.

In some embodiments, the TLR7 agonist comprises a compound disclosed in International Application Publication No. WO2011/049677, which is hereby incorporated by reference in its entirety. In some embodiments, the TLR7 agonist comprises 3-(5-amino-2-(4-(2-(3,3-difluoro-3- phosphonopropoxy)ethoxy)-2-methylphenethyl)benzo[f][1,7]naph thyridin-8-yl)propanoic acid. In some 10 embodiments, the TLR7 agonist comprises a compound of formula:

In another embodiment, the compounds of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, of the present disclosure are used in combination with one or more angiogenesis inhibitors to treat cancer, e.g., Bevacizumab (Avastin®),15 axitinib (Inlyta®); Brivanib alaninate (BMS-582664, (S)-((R)-1-(4-(4-Fluoro-2-methyl-1H-indol-5-yloxy)- 5-methylpyrrolo[2,1-f][1,2,4]triazin-6-yloxy)propan-2-yl)2-a minopropanoate); Sorafenib (Nexavar®); Pazopanib (Votrient®); Sunitinib malate (Sutent®); Cediranib (AZD2171, CAS 288383-20-1); Vargatef (BIBF1120, CAS 928326-83-4); Foretinib (GSK1363089); Telatinib (BAY57-9352, CAS 332012-40-5); Apatinib (YN968D1, CAS 811803-05-1); Imatinib (Gleevec®); Ponatinib (AP24534, CAS 943319-70-8); 20 Tivozanib (AV951, CAS 475108-18-0); Regorafenib (BAY73-4506, CAS 755037-03-7); Vatalanib dihydrochloride (PTK787, CAS 212141-51-0); Brivanib (BMS-540215, CAS 649735-46-6); Vandetanib (Caprelsa® or AZD6474); Motesanib diphosphate (AMG706, CAS 857876-30-3, N-(2,3-dihydro-3,3- dimethyl-1H-indol-6-yl)-2-[(4-pyridinylmethyl)amino]-3-pyrid inecarboxamide, described in PCT Publication No. WO 02/066470); Dovitinib dilactic acid (TKI258, CAS 852433-84-2); Linfanib (ABT869,25 CAS 796967-16-3); Cabozantinib (XL184, CAS 849217-68-1); Lestaurtinib (CAS 111358-88-4); N-[5- [[[5-(1,1-Dimethylethyl)-2-oxazolyl]methyl]thio]-2-thiazolyl ]-4-piperidinecarboxamide (BMS38703, CAS 345627-80-7); (3R,4R)-4-Amino-1-((4-((3-methoxyphenyl)amino)pyrrolo[2,1-f] [1,2,4]triazin-5- yl)methyl)piperidin-3-ol (BMS690514); N-(3,4-Dichloro-2-fluorophenyl)-6-methoxy-7-[[(3aa,5b,6aa)- octahydro-2-methylcyclopenta[c]pyrrol-5-yl]methoxy]- 4-quinazolinamine (XL647, CAS 781613-23-8); 4-Methyl-3-[[1-methyl-6-(3-pyridinyl)-1H-pyrazolo[3,4-d]pyri midin-4-yl]amino]-N-[3- (trifluoromethyl)phenyl]-benzamide (BHG712, CAS 940310-85-0); or Aflibercept (Eylea®).

In another embodiment, the compounds of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, of the present disclosure are used in 5 combination with one or more heat shock protein inhibitors to treat cancer, e.g., Tanespimycin (17- allylamino-17-demethoxygeldanamycin, also known as KOS-953 and 17-AAG, available from SIGMA, and described in US Patent No.4,261,989); Retaspimycin (IPI504), Ganetespib (STA-9090); [6-Chloro-9- (4-methoxy-3,5-dimethylpyridin-2-ylmethyl)-9H-purin-2-yl]ami ne (BIIB021 or CNF2024, CAS 848695- 25-0); trans-4-[[2-(Aminocarbonyl)-5-[4,5,6,7-tetrahydro-6,6-dimeth yl-4-oxo-3-(trifluoromethyl)-1H-10 indazol-1-yl]phenyl]amino]cyclohexyl glycine ester (SNX5422 or PF04929113, CAS 908115-27-5); 5- [2,4-Dihydroxy-5-(1-methylethyl)phenyl]-N-ethyl-4-[4-(4-morp holinylmethyl)phenyl]- 3- Isoxazolecarboxamide (AUY922, CAS 747412-49-3); or 17-Dimethylaminoethylamino-17- demethoxygeldanamycin (17-DMAG).

In yet another embodiment, the compounds of Formula (I), or a pharmaceutically acceptable salt, 15 hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, of the present disclosure are used in combination with one or more HDAC inhibitors or other epigenetic modifiers. Exemplary HDAC inhibitors include, but not limited to, Voninostat (Zolinza®); Romidepsin (Istodax®); Treichostatin A (TSA); Oxamflatin; Vorinostat (Zolinza®, Suberoylanilide hydroxamic acid); Pyroxamide (syberoyl-3- aminopyridineamide hydroxamic acid); Trapoxin A (RF-1023A); Trapoxin B (RF-10238); Cyclo[(aS,2S)-20 a-amino-h-oxo-2-oxiraneoctanoyl-O-methyl-D-tyrosyl-L-isoleuc yl-L-prolyl] (Cyl-1); Cyclo[(aS,2S)-a- amino-h-oxo-2-oxiraneoctanoyl-O-methyl-D-tyrosyl-L-isoleucyl -(2S)-2-piperidinecarbonyl] (Cyl-2); Cyclic[L-alanyl-D-alanyl-(2S)-h-oxo-L-a-aminooxiraneoctanoyl -D-prolyl] (HC-toxin); Cyclo[(aS,2S)-a- amino-h-oxo-2-oxiraneoctanoyl-D-phenylalanyl-L-leucyl-(2S)-2 -piperidinecarbonyl] (WF-3161); Chlamydocin ((S)-Cyclic(2-methylalanyl-L-phenylalanyl-D-prolyl-h-oxo-L-a -aminooxiraneoctanoyl); 25 Apicidin (Cyclo(8-oxo-L-2-aminodecanoyl-1-methoxy-L-tryptophyl-L-isol eucyl-D-2-piperidinecarbonyl);

Romidepsin (Istodax®, FR-901228); 4-Phenylbutyrate; Spiruchostatin A; Mylproin (Valproic acid); Entinostat (MS-275, N-(2-Aminophenyl)-4-[N-(pyridine-3-yl-methoxycarbonyl)-amino -methyl]- benzamide); Depudecin (4,5:8,9-dianhydro-1,2,6,7,11-pentadeoxy- D-threo-D-ido-Undeca-1,6-dienitol); 4-(Acetylamino)-N-(2-aminophenyl)-benzamide (also known as CI-994); N1-(2-Aminophenyl)-N8-30 phenyl-octanediamide (also known as BML-210); 4-(Dimethylamino)-N-(7-(hydroxyamino)-7- oxoheptyl)benzamide (also known as M344); (E)-3-(4-(((2-(1H-indol-3-yl)ethyl)(2-hydroxyethyl)amino)- methyl)phenyl)-N-hydroxyacrylamide; Panobinostat(Farydak®); Mocetinostat, and Belinostat (also known as PXD101, Beleodaq®, or (2E)-N-Hydroxy-3-[3-(phenylsulfamoyl)phenyl]prop-2-enamide), or chidamide (also known as CS055 or HBI-8000, (E)-N-(2-amino-5-fluorophenyl)-4-((3-(pyridin-3- 35 yl)acrylamido)methyl)benzamide). Other epigenetic modifiers include but not limited to inhibitors of EZH2 (enhancer of zeste homolog 2), EED (embryonic ectoderm development), or LSD1 (lysine-specific histone demethylase 1A or KDM1A). In yet another embodiment, the compounds of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, of the present disclosure are used in combination with one or more inhibitors of indoleamine-pyrrole 2,3-dioxygenase (IDO), for example, Indoximod (also known as NLG-8189), a-Cyclohexyl-5H-imidazo[5,1-a]isoindole-5-ethanol (also known 5 as NLG919), or (4E)-4-[(3-Chloro-4-fluoroanilino)-nitrosomethylidene]-1,2,5 -oxadiazol-3-amine (also known as INCB024360), to treat cancer.

Chimeric Antigen Receptors

The present disclosure provides for the compounds of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof for use in combination with adoptive 10 immunotherapy methods and reagents such as chimeric antigen receptor (CAR) immune effector cells, e.g., T cells, or chimeric TCR-transduced immune effector cells, e.g., T cells. This section describes CAR technology generally that is useful in combination with the compounds of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, and describes CAR reagents, e.g., cells and compositions, and methods.

15 In general, aspects of the present disclosure pertain to or include an isolated nucleic acid molecule encoding a chimeric antigen receptor (CAR), wherein the CAR comprises an antigen binding domain (e.g., antibody or antibody fragment, TCR or TCR fragment) that binds to a tumor antigen as described herein, a transmembrane domain (e.g., a transmembrane domain described herein), and an intracellular signaling domain (e.g., an intracellular signaling domain described herein) (e.g., an intracellular signaling domain 20 comprising a costimulatory domain (e.g., a costimulatory domain described herein) and/or a primary signaling domain (e.g., a primary signaling domain described herein). In other aspects, the present disclosure includes: host cells containing the above nucleic acids and isolated proteins encoded by such nucleic acid molecules. CAR nucleic acid constructs, encoded proteins, containing vectors, host cells, pharmaceutical compositions, and methods of administration and treatment related to the present disclosure 25 are disclosed in detail in International Patent Application Publication No. WO2015142675, which is incorporated by reference in its entirety.

In one aspect, the disclosure pertains to an isolated nucleic acid molecule encoding a chimeric antigen receptor (CAR), wherein the CAR comprises an antigen binding domain (e.g., antibody or antibody fragment, TCR or TCR fragment) that binds to a tumor-supporting antigen (e.g., a tumor-supporting antigen 30 as described herein), a transmembrane domain (e.g., a transmembrane domain described herein), and an intracellular signaling domain (e.g., an intracellular signaling domain described herein) (e.g., an intracellular signaling domain comprising a costimulatory domain (e.g., a costimulatory domain described herein) and/or a primary signaling domain (e.g., a primary signaling domain described herein). In some embodiments, the tumor-supporting antigen is an antigen present on a stromal cell or a myeloid-derived 35 suppressor cell (MDSC). In other aspects, the disclosure features polypeptides encoded by such nucleic acids and host cells containing such nucleic acids and/or polypeptides. Alternatively, aspects of the disclosure pertain to isolated nucleic acid encoding a chimeric T cell receptor (TCR) comprising a TCR alpha and/or TCR beta variable domain with specificity for a cancer antigen described herein. See for example, Dembic et al., Nature, 320, 232-238 (1986), Schumacher, Nat. Rev. Immunol., 2, 512-519 (2002), Kershaw et al., Nat. Rev. Immunol., 5, 928-940 (2005), Xue et al., Clin. 5 Exp. Immunol., 139, 167-172 (2005), Rossig et al., Mol. Ther., 10, 5-18 (2004), and Murphy et al., Immunity, 22, 403-414 (2005); (Morgan et al. J. Immunol., 171, 3287-3295 (2003), Hughes et al., Hum. Gene Ther., 16, 1-16 (2005), Zhao et al., J. Immunol., 174, 4415-4423 (2005), Roszkowski et al., Cancer Res., 65, 1570- 1576 (2005), and Engels et al., Hum. Gene Ther., 16, 799-810 (2005); US2009/03046557, the contents of which are hereby incorporated by reference in their entirety. Such chimeric TCRs may recognize, for 10 example, cancer antigens such as MART-1, gp-100, p53, and NY-ESO-1, MAGE A3/A6, MAGEA3, SSX2, HPV-16 E6 or HPV-16 E7. In other aspects, the disclosure features polypeptides encoded by such nucleic acids and host cells containing such nucleic acids and/or polypeptides.

Sequences of non-limiting examples of various components that can be part of a CAR are listed in Table 11a, where“aa” stands for amino acids, and“na” stands for nucleic acids that encode the 15 corresponding peptide.

Table 11a. Sequences of various components of CAR (aa– amino acid sequence, na– nucleic acid sequence).

Targets

The present disclosure provides cells, e.g., immune effector cells (e.g., T cells, NK cells), that comprise or at any time comprised a gRNA molecule or CRISPR system as described herein, that are further engineered to contain one or more CARs that direct the immune effector cells to undesired cells (e.g., cancer 5 cells). This is achieved through an antigen binding domain on the CAR that is specific for a cancer associated antigen. There are two classes of cancer associated antigens (tumor antigens) that can be targeted by the CARs of the instant disclosure: (1) cancer associated antigens that are expressed on the surface of cancer cells; and (2) cancer associated antigens that itself is intracellular, however, a fragment of such antigen (peptide) is presented on the surface of the cancer cells by MHC (major histocompatibility complex). 10 In some embodiments, the tumor antigen is chosen from one or more of: CD19; CD123; CD22;

CD30; CD171; CS-1 (also referred to as CD2 subset 1, CRACC, SLAMF7, CD319, and 19A24); C-type lectin-like molecule-1 (CLL-1 or CLECL1); CD33; epidermal growth factor receptor variant III (EGFRvIII); ganglioside G2 (GD2); ganglioside GD3 (aNeu5Ac(2-8)aNeu5Ac(2-3)bDGalp(1- 4)bDGlcp(1-1)Cer); TNF receptor family member B cell maturation (BCMA); Tn antigen ((Tn Ag) or (GalNAca-Ser/Thr)); prostate-specific membrane antigen (PSMA); Receptor tyrosine kinase-like orphan receptor 1 (ROR1); Fms-Like Tyrosine Kinase 3 (FLT3); Tumor-associated glycoprotein 72 (TAG72); 5 CD38; CD44v6; Carcinoembryonic antigen (CEA); Epithelial cell adhesion molecule (EPCAM); B7H3 (CD276); KIT (CD117); Interleukin-13 receptor subunit alpha-2 (IL-13Ra2 or CD213A2); Mesothelin; Interleukin 11 receptor alpha (IL-11Ra); prostate stem cell antigen (PSCA); Protease Serine 21 (Testisin or PRSS21); vascular endothelial growth factor receptor 2 (VEGFR ₂ ); Lewis(Y) antigen; CD24; Platelet- derived growth factor receptor beta (PDGFR-beta); Stage-specific embryonic antigen-4 (SSEA-4); CD20; 10 Folate receptor alpha; Receptor tyrosine-protein kinase ERBB2 (Her2/neu); Mucin 1, cell surface associated (MUC1); epidermal growth factor receptor (EGFR); neural cell adhesion molecule (NCAM); Prostase; prostatic acid phosphatase (PAP); elongation factor 2 mutated (ELF2M); Ephrin B2; fibroblast activation protein alpha (FAP); insulin-like growth factor 1 receptor (IGF-I receptor), carbonic anhydrase IX (CAIX); Proteasome (Prosome, Macropain) Subunit, Beta Type, 9 (LMP2); glycoprotein 100 (gp100); 15 oncogene fusion protein consisting of breakpoint cluster region (BCR) and Abelson murine leukemia viral oncogene homolog 1 (Abl) (bcr-abl); tyrosinase; ephrin type-A receptor 2 (EphA2); Fucosyl GM1; sialyl Lewis adhesion molecule (sLe); ganglioside GM3 (aNeu5Ac(2-3)bDGalp(1-4)bDGlcp(1-1)Cer); transglutaminase 5 (TGS5); high molecular weight-melanoma-associated antigen (HMWMAA); o-acetyl- GD2 ganglioside (OAcGD2); Folate receptor beta; tumor endothelial marker 1 (TEM1/CD248); tumor 20 endothelial marker 7-related (TEM7R); claudin 6 (CLDN6); thyroid stimulating hormone receptor (TSHR);

G protein-coupled receptor class C group 5, member D (GPRC5D); chromosome X open reading frame 61 (CXORF61); CD97; CD179a; anaplastic lymphoma kinase (ALK); Polysialic acid; placenta-specific 1 (PLAC1); hexasaccharide portion of globoH glycoceramide (GloboH); mammary gland differentiation antigen (NY-BR-1); uroplakin 2 (UPK2); Hepatitis A virus cellular receptor 1 (HAVCR1); adrenoceptor 25 beta 3 (ADRB3); pannexin 3 (PANX3); G protein-coupled receptor 20 (GPR ₂ 0); lymphocyte antigen 6 complex, locus K 9 (LY6K); Olfactory receptor 51E2 (OR51E2); TCR Gamma Alternate Reading Frame Protein (TARP); Wilms tumor protein (WT1); Cancer/testis antigen 1 (NY-ESO-1); Cancer/testis antigen 2 (LAGE-1a); Melanoma-associated antigen 1 (MAGE-A1); ETS translocation-variant gene 6, located on chromosome 12p (ETV6-AML); sperm protein 17 (SPA17); X Antigen Family, Member 1A (XAGE1); 30 angiopoietin-binding cell surface receptor 2 (Tie 2); melanoma cancer testis antigen-1 (MAD-CT-1); melanoma cancer testis antigen-2 (MAD-CT-2); Fos-related antigen 1; tumor protein p53 (p53); p53 mutant; prostein; surviving; telomerase; prostate carcinoma tumor antigen-1 (PCTA-1 or Galectin 8), melanoma antigen recognized by T cells 1 (MelanA or MART1); Rat sarcoma (Ras) mutant; human Telomerase reverse transcriptase (hTERT); sarcoma translocation breakpoints; melanoma inhibitor of apoptosis (ML-35 IAP); ERG (transmembrane protease, serine 2 (TMPRSS2) ETS fusion gene); N-Acetyl glucosaminyl- transferase V (NA17); paired box protein Pax-3 (PAX3); Androgen receptor; Cyclin B1; v-myc avian myelocytomatosis viral oncogene neuroblastoma derived homolog (MYCN); Ras Homolog Family Member C (RhoC); Tyrosinase-related protein 2 (TRP-2); Cytochrome P450 1B1 (CYP1B1); CCCTC- Binding Factor (Zinc Finger Protein)-Like (BORIS or Brother of the Regulator of Imprinted Sites), Squamous Cell Carcinoma Antigen Recognized By T Cells 3 (SART3); Paired box protein Pax-5 (PAX5); proacrosin binding protein sp32 (OY-TES1); lymphocyte-specific protein tyrosine kinase (LCK); A kinase 5 anchor protein 4 (AKAP-4); synovial sarcoma, X breakpoint 2 (SSX2); Receptor for Advanced Glycation Endproducts (RAGE-1); renal ubiquitous 1 (RU1); renal ubiquitous 2 (RU2); legumain; human papilloma virus E6 (HPV E6); human papilloma virus E7 (HPV E7); intestinal carboxyl esterase; heat shock protein 70-2 mutated (mut hsp70-2); CD79a; CD79b; CD72; Leukocyte-associated immunoglobulin-like receptor 1 (LAIR1); Fc fragment of IgA receptor (FCAR or CD89); Leukocyte immunoglobulin-like receptor 10 subfamily A member 2 (LILRA2); CD300 molecule-like family member f (CD300LF); C-type lectin domain family 12 member A (CLEC12A); bone marrow stromal cell antigen 2 (BST2); EGF-like module- containing mucin-like hormone receptor-like 2 (EMR ₂ ); lymphocyte antigen 75 (LY75); Glypican-3 (GPC3); Fc receptor-like 5 (FCRL5); and immunoglobulin lambda-like polypeptide 1 (IGLL1).

A CAR described herein can comprise an antigen binding domain (e.g., antibody or antibody 15 fragment, TCR or TCR fragment) that binds to a tumor-supporting antigen (e.g., a tumor-supporting antigen as described herein). In some embodiments, the tumor-supporting antigen is an antigen present on a stromal cell or a myeloid-derived suppressor cell (MDSC). Stromal cells can secrete growth factors to promote cell division in the microenvironment. MDSC cells can inhibit T cell proliferation and activation. Without wishing to be bound by theory, in some embodiments, the CAR-expressing cells destroy the tumor- 20 supporting cells, thereby indirectly inhibiting tumor growth or survival.

In embodiments, the stromal cell antigen is chosen from one or more of: bone marrow stromal cell antigen 2 (BST2), fibroblast activation protein (FAP) and tenascin. In an embodiment, the FAP-specific antibody is, competes for binding with, or has the same CDRs as, sibrotuzumab. In embodiments, the MDSC antigen is chosen from one or more of: CD33, CD11b, C14, CD15, and CD66b. Accordingly, in some embodiments, 25 the tumor-supporting antigen is chosen from one or more of: bone marrow stromal cell antigen 2 (BST2), fibroblast activation protein (FAP) or tenascin, CD33, CD11b, C14, CD15, and CD66b.

Antigen Binding Domain Structures

In some embodiments, the antigen binding domain of the encoded CAR molecule comprises an antibody, an antibody fragment, an scFv, a Fv, a Fab, a (Fab’)2, a single domain antibody (SDAB), a VH 30 or VL domain, a camelid VHH domain or a bi-functional (e.g. bi-specific) hybrid antibody (e.g., Lanzavecchia et al., Eur. J. Immunol.17, 105 (1987)).

In some instances, scFvs can be prepared according to method known in the art (see, for example, Bird et al., (1988) Science 242:423-426 and Huston et al., (1988) Proc. Natl. Acad. Sci. USA 85:5879- 5883). ScFv molecules can be produced by linking VH and VL regions together using flexible polypeptide 35 linkers. The scFv molecules comprise a linker (e.g., a Ser-Gly linker) with an optimized length and/or amino acid composition. The linker length can greatly affect how the variable regions of a scFv fold and interact. In fact, if a short polypeptide linker is employed (e.g., between 5-10 amino acids) intrachain folding is prevented. Interchain folding is also required to bring the two variable regions together to form a functional epitope binding site. For examples of linker orientation and size see, e.g., Hollinger et al.1993 Proc Natl Acad. Sci. U.S.A.90:6444-6448, U.S. Patent Application Publication Nos.2005/0100543, 2005/0175606, 2007/0014794, and PCT publication Nos. WO2006/020258 and WO2007/024715, is incorporated herein 5 by reference.

An scFv can comprise a linker of at least 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 25, 30, 35, 40, 45, 50, or more amino acid residues between its VL and VH regions. The linker sequence may comprise any naturally occurring amino acid. In some embodiments, the linker sequence comprises amino acids glycine and serine. In another embodiment, the linker sequence comprises sets of 10 glycine and serine repeats such as (Gly4Ser)n, where n is a positive integer equal to or greater than 1 (SEQ ID NO: 217). In one embodiment, the linker can be (Gly ₄ Ser) ₄ (SEQ ID NO: 215) or (Gly ₄ Ser) ₃ (SEQ ID NO: 216). Variation in the linker length may retain or enhance activity, giving rise to superior efficacy in activity studies.

In another aspect, the antigen binding domain is a T cell receptor (“TCR”), or a fragment thereof, 15 for example, a single chain TCR (scTCR). Methods to make such TCRs are known in the art. See, e.g., Willemsen RA et al, Gene Therapy 7: 1369–1377 (2000); Zhang T et al, Cancer Gene Ther 11: 487–496 (2004); Aggen et al, Gene Ther.19(4):365-74 (2012) (references are incorporated herein by its entirety). For example, scTCR can be engineered that contains the Va and Vb genes from a T cell clone linked by a linker (e.g., a flexible peptide). This approach is very useful to cancer associated target that itself is 20 intracellular, however, a fragment of such antigen (peptide) is presented on the surface of the cancer cells by MHC.

In certain embodiments, the encoded antigen binding domain has a binding affinity KD of 10 ^-4 M to 10 ^-8 M.

In one embodiment, the encoded CAR molecule comprises an antigen binding domain that has a 25 binding affinity KD of 10 ^-4 M to 10 ^-8 M, e.g., 10 ^-5 M to 10 ^-7 M, e.g., 10 ^-6 M or 10 ^-7 M, for the target antigen.

In one embodiment, the antigen binding domain has a binding affinity that is at least five-fold, 10-fold, 20- fold, 30-fold, 50-fold, 100-fold or 1,000-fold less than a reference antibody, e.g., an antibody described herein. In one embodiment, the encoded antigen binding domain has a binding affinity at least 5-fold less than a reference antibody (e.g., an antibody from which the antigen binding domain is derived). In one 30 aspect such antibody fragments are functional in that they provide a biological response that can include, but is not limited to, activation of an immune response, inhibition of signal-transduction origination from its target antigen, inhibition of kinase activity, and the like, as will be understood by a skilled artisan. In one aspect, the antigen binding domain of the CAR is a scFv antibody fragment that is humanized compared to the murine sequence of the scFv from which it is derived.

35 In one aspect, the antigen binding domain of a CAR of the disclosure (e.g., a scFv) is encoded by a nucleic acid molecule whose sequence has been codon optimized for expression in a mammalian cell. In one aspect, entire CAR construct of the disclosure is encoded by a nucleic acid molecule whose entire sequence has been codon optimized for expression in a mammalian cell. Codon optimization refers to the discovery that the frequency of occurrence of synonymous codons (i.e., codons that code for the same amino acid) in coding DNA is biased in different species. Such codon degeneracy allows an identical polypeptide to be encoded by a variety of nucleotide sequences. A variety of codon optimization methods 5 is known in the art, and include, e.g., methods disclosed in at least US Patent Nos 5,786,464 and 6,114,148.

Antigen binding domains (and the targeted antigens)

In one embodiment, an antigen binding domain against CD19 is an antigen binding portion, e.g., CDRs, of a CAR, antibody or antigen-binding fragment thereof described in, e.g., PCT publication WO2012/079000; PCT publication WO2014/153270; Kochenderfer, J.N. et al., J. Immunother.32 (7), 689- 10 702 (2009); Kochenderfer, J.N., et al., Blood, 116 (20), 4099-4102 (2010); PCT publication WO2014/031687; Bejcek, Cancer Research, 55, 2346-2351, 1995; or U.S. Patent No.7,446,190.

In one embodiment, an antigen binding domain against mesothelin is an antigen binding portion, e.g., CDRs, of an antibody, antigen-binding fragment or CAR described in, e.g., PCT publication WO2015/090230. In one embodiment, an antigen binding domain against mesothelin is an antigen binding 15 portion, e.g., CDRs, of an antibody, antigen-binding fragment, or CAR described in, e.g., PCT publication WO1997/025068, WO1999/028471, WO2005/014652, WO2006/099141, WO2009/045957, WO2009/068204, WO2013/142034, WO2013/040557, or WO2013/063419. In one embodiment, an antigen binding domain against mesothelin is an antigen binding portion, e.g., CDRs, of an antibody, antigen-binding fragment, or CAR described in WO/2015/090230.

20 In one embodiment, an antigen binding domain against CD123 is an antigen binding portion, e.g., CDRs, of an antibody, antigen-binding fragment or CAR described in, e.g., PCT publication WO2014/130635. In one embodiment, an antigen binding domain against CD123 is an antigen binding portion, e.g., CDRs, of an antibody, antigen-binding fragment, or CAR described in, e.g., PCT publication WO2014/138805, WO2014/138819, WO2013/173820, WO2014/144622, WO2001/66139, 25 WO2010/126066, WO2014/144622, or US2009/0252742. In one embodiment, an antigen binding domain against CD123 is an antigen binding portion, e.g., CDRs, of an antibody, antigen-binding fragment, or CAR described in WO/2016/028896.

In one embodiment, an antigen binding domain against EGFRvIII is an antigen binding portion, e.g., CDRs, of an antibody, antigen-binding fragment or CAR described in, e.g., WO/2014/130657. 30 In one embodiment, an antigen binding domain against CD22 is an antigen binding portion, e.g., CDRs, of an antibody described in, e.g., Haso et al., Blood, 121(7): 1165-1174 (2013); Wayne et al., Clin Cancer Res 16(6): 1894-1903 (2010); Kato et al., Leuk Res 37(1):83-88 (2013); Creative BioMart (creativebiomart.net): MOM-18047-S(P).

In one embodiment, an antigen binding domain against CS-1 is an antigen binding portion, e.g., 35 CDRs, of Elotuzumab (BMS), see e.g., Tai et al., 2008, Blood 112(4):1329-37; Tai et al., 2007, Blood.

110(5):1656-63. In one embodiment, an antigen binding domain against CLL-1 is an antigen binding portion, e.g., CDRs, of an antibody available from R&D, ebiosciences, Abcam, for example, PE-CLL1-hu Cat# 353604 (BioLegend); and PE-CLL1 (CLEC12A) Cat# 562566 (BD). In one embodiment, an antigen binding domain against CLL-1 is an antigen binding portion, e.g., CDRs, of an antibody, antigen-binding fragment, 5 or CAR described in WO/2016/014535.

In one embodiment, an antigen binding domain against CD33 is an antigen binding portion, e.g., CDRs, of an antibody described in, e.g., Bross et al., Clin Cancer Res 7(6):1490-1496 (2001) (Gemtuzumab Ozogamicin, hP67.6),Caron et al., Cancer Res 52(24):6761-6767 (1992) (Lintuzumab, HuM195), Lapusan et al., Invest New Drugs 30(3):1121-1131 (2012) (AVE9633), Aigner et al., Leukemia 27(5): 1107-1115 10 (2013) (AMG330, CD33 BiTE), Dutour et al., Adv hematol 2012:683065 (2012), and Pizzitola et al., Leukemia doi:10.1038/Lue.2014.62 (2014). In one embodiment, an antigen binding domain against CD33 is an antigen binding portion, e.g., CDRs, of an antibody, antigen-binding fragment, or CAR described in WO/2016/014576.

In one embodiment, an antigen binding domain against GD2 is an antigen binding portion, e.g., 15 CDRs, of an antibody described in, e.g., Mujoo et al., Cancer Res.47(4):1098-1104 (1987); Cheung et al., Cancer Res 45(6):2642-2649 (1985), Cheung et al., J Clin Oncol 5(9):1430-1440 (1987), Cheung et al., J Clin Oncol 16(9):3053-3060 (1998), Handgretinger et al., Cancer Immunol Immunother 35(3):199-204 (1992). In some embodiments, an antigen binding domain against GD2 is an antigen binding portion of an antibody selected from mAb 14.18, 14G2a, ch14.18, hu14.18, 3F8, hu3F8, 3G6, 8B6, 60C3, 10B8, ME36.1, 20 and 8H9, see e.g., WO2012033885, WO2013040371, WO2013192294, WO2013061273, WO2013123061, WO2013074916, and WO201385552. In some embodiments, an antigen binding domain against GD2 is an antigen binding portion of an antibody described in US Publication No.: 20100150910 or PCT Publication No.: WO 2011160119.

In one embodiment, an antigen binding domain against BCMA is an antigen binding portion, e.g., 25 CDRs, of an antibody described in, e.g., WO2012163805, WO200112812, and WO2003062401. In one embodiment, an antigen binding domain against BCMA is an antigen binding portion, e.g., CDRs, of an antibody, antigen-binding fragment, or CAR described in WO/2016/014565.

In one embodiment, an antigen binding domain against Tn antigen is an antigen binding portion, e.g., CDRs, of an antibody described in, e.g., US 8,440,798, Brooks et al., PNAS 107(22):10056-10061 30 (2010), and Stone et al., OncoImmunology 1(6):863-873(2012).

In one embodiment, an antigen binding domain against PSMA is an antigen binding portion, e.g., CDRs, of an antibody described in, e.g., Parker et al., Protein Expr Purif 89(2):136-145 (2013), US 20110268656 (J591 ScFv); Frigerio et al, European J Cancer 49(9):2223-2232 (2013) (scFvD2B); WO 2006125481 (mAbs 3/A12, 3/E7 and 3/F11) and single chain antibody fragments (scFv A5 and D7). 35 In one embodiment, an antigen binding domain against ROR1 is an antigen binding portion, e.g., CDRs, of an antibody described in, e.g., Hudecek et al., Clin Cancer Res 19(12):3153-3164 (2013); WO 2011159847; and US20130101607. In one embodiment, an antigen binding domain against FLT3 is an antigen binding portion, e.g., CDRs, of an antibody described in, e.g., WO2011076922, US 5777084, EP0754230, US20090297529, and several commercial catalog antibodies (R&D, ebiosciences, Abcam).

In one embodiment, an antigen binding domain against TAG72 is an antigen binding portion, e.g., 5 CDRs, of an antibody described in, e.g., Hombach et al., Gastroenterology 113(4):1163-1170 (1997); and Abcam ab691.

In one embodiment, an antigen binding domain against FAP is an antigen binding portion, e.g., CDRs, of an antibody described in, e.g., Ostermann et al., Clinical Cancer Research 14:4584-4592 (2008) (FAP5), US Pat. Publication No. 2009/0304718; sibrotuzumab (see e.g., Hofheinz et al., Oncology 10 Research and Treatment 26(1), 2003); and Tran et al., J Exp Med 210(6):1125-1135 (2013).

In one embodiment, an antigen binding domain against CD38 is an antigen binding portion, e.g., CDRs, of daratumumab (see, e.g., Groen et al., Blood 116(21):1261-1262 (2010); MOR ₂ 02 (see, e.g., US 8,263,746); or antibodies described in US 8,362,211.

In one embodiment, an antigen binding domain against CD44v6 is an antigen binding portion, e.g., 15 CDRs, of an antibody described in, e.g., Casucci et al., Blood 122(20):3461-3472 (2013).

In one embodiment, an antigen binding domain against CEA is an antigen binding portion, e.g., CDRs, of an antibody described in, e.g., Chmielewski et al., Gastoenterology 143(4):1095-1107 (2012).

In one embodiment, an antigen binding domain against EPCAM is an antigen binding portion, e.g., CDRS, of an antibody selected from MT110, EpCAM-CD3 bispecific Ab (see, e.g., 20 clinicaltrials.gov/ct2/show/NCT00635596); Edrecolomab; 3622W94; ING-1; and adecatumumab (MT201).

In one embodiment, an antigen binding domain against PRSS21 is an antigen binding portion, e.g., CDRs, of an antibody described in US Patent No.: 8,080,650.

In one embodiment, an antigen binding domain against B7H3 is an antigen binding portion, e.g., CDRs, of an antibody MGA271 (Macrogenics).

25 In one embodiment, an antigen binding domain against KIT is an antigen binding portion, e.g., CDRs, of an antibody described in, e.g., US 7915391, US20120288506, and several commercial catalog antibodies.

In one embodiment, an antigen binding domain against IL-13Ra2 is an antigen binding portion, e.g., CDRs, of an antibody described in, e.g., WO2008/146911, WO2004087758, several commercial 30 catalog antibodies, and WO2004087758.

In one embodiment, an antigen binding domain against CD30 is an antigen binding portion, e.g., CDRs, of an antibody described in, e.g., US 7090843 B1, and EP0805871.

In one embodiment, an antigen binding domain against GD3 is an antigen binding portion, e.g., CDRs, of an antibody described in, e.g., US 7253263; US 8,207,308; US 20120276046; EP1013761; 35 WO2005035577; and US 6437098.

In one embodiment, an antigen binding domain against CD171 is an antigen binding portion, e.g., CDRs, of an antibody described in, e.g., Hong et al., J Immunother 37(2):93-104 (2014). In one embodiment, an antigen binding domain against IL-11Ra is an antigen binding portion, e.g., CDRs, of an antibody available from Abcam (cat# ab55262) or Novus Biologicals (cat# EPR5446). In another embodiment, an antigen binding domain again IL-11Ra is a peptide, see, e.g., Huang et al., Cancer Res 72(1):271-281 (2012).

5 In one embodiment, an antigen binding domain against PSCA is an antigen binding portion, e.g., CDRs, of an antibody described in, e.g., Morgenroth et al., Prostate 67(10):1121-1131 (2007) (scFv 7F5); Nejatollahi et al., J of Oncology 2013(2013), article ID 839831 (scFv C5-II); and US Pat Publication No. 20090311181.

In one embodiment, an antigen binding domain against VEGFR ₂ is an antigen binding portion, e.g., 10 CDRs, of an antibody described in, e.g., Chinnasamy et al., J Clin Invest 120(11):3953-3968 (2010).

In one embodiment, an antigen binding domain against LewisY is an antigen binding portion, e.g., CDRs, of an antibody described in, e.g., Kelly et al., Cancer Biother Radiopharm 23(4):411-423 (2008) (hu3S193 Ab (scFvs)); Dolezal et al., Protein Engineering 16(1):47-56 (2003) (NC10 scFv).

In one embodiment, an antigen binding domain against CD24 is an antigen binding portion, e.g., 15 CDRs, of an antibody described in, e.g., Maliar et al., Gastroenterology 143(5):1375-1384 (2012).

In one embodiment, an antigen binding domain against PDGFR-beta is an antigen binding portion, e.g., CDRs, of an antibody Abcam ab32570.

In one embodiment, an antigen binding domain against SSEA-4 is an antigen binding portion, e.g., CDRs, of antibody MC813 (Cell Signaling), or other commercially available antibodies.

20 In one embodiment, an antigen binding domain against CD20 is an antigen binding portion, e.g., CDRs, of the antibody Rituximab, Ofatumumab, Ocrelizumab, Veltuzumab, or GA101.

In one embodiment, an antigen binding domain against Folate receptor alpha is an antigen binding portion, e.g., CDRs, of the antibody IMGN853, or an antibody described in US20120009181; US4851332, LK26: US 5952484.

25 In one embodiment, an antigen binding domain against ERBB2 (Her2/neu) is an antigen binding portion, e.g., CDRs, of the antibody trastuzumab, or pertuzumab.

In one embodiment, an antigen binding domain against MUC1 is an antigen binding portion, e.g., CDRs, of the antibody SAR566658.

In one embodiment, the antigen binding domain against EGFR is antigen binding portion, e.g., 30 CDRs, of the antibody cetuximab, panitumumab, zalutumumab, nimotuzumab, or matuzumab.

In one embodiment, an antigen binding domain against NCAM is an antigen binding portion, e.g., CDRs, of the antibody clone 2-2B: MAB5324 (EMD Millipore).

In one embodiment, an antigen binding domain against Ephrin B2 is an antigen binding portion, e.g., CDRs, of an antibody described in, e.g., Abengozar et al., Blood 119(19):4565-4576 (2012).

35 In one embodiment, an antigen binding domain against IGF-I receptor is an antigen binding portion, e.g., CDRs, of an antibody described in, e.g., US 8344112 B2; EP2322550 A1; WO 2006/138315, or PCT/US2006/022995. In one embodiment, an antigen binding domain against CAIX is an antigen binding portion, e.g., CDRs, of the antibody clone 303123 (R&D Systems).

In one embodiment, an antigen binding domain against LMP2 is an antigen binding portion, e.g., CDRs, of an antibody described in, e.g., US 7,410,640, or US20050129701.

5 In one embodiment, an antigen binding domain against gp100 is an antigen binding portion, e.g., CDRs, of the antibody HMB45, NKIbetaB, or an antibody described in WO2013165940, or US20130295007

In one embodiment, an antigen binding domain against tyrosinase is an antigen binding portion, e.g., CDRs, of an antibody described in, e.g., US 5843674; or US19950504048.

10 In one embodiment, an antigen binding domain against EphA2 is an antigen binding portion, e.g., CDRs, of an antibody described in, e.g., Yu et al., Mol Ther 22(1):102-111 (2014).

In one embodiment, an antigen binding domain against GD3 is an antigen binding portion, e.g., CDRs, of an antibody described in, e.g., US 7253263; US 8,207,308; US 20120276046; EP1013761 A3; 20120276046; WO2005035577; or US 6437098.

15 In one embodiment, an antigen binding domain against fucosyl GM1 is an antigen binding portion, e.g., CDRs, of an antibody described in, e.g., US20100297138; or WO2007/067992.

In one embodiment, an antigen binding domain against sLe is an antigen binding portion, e.g., CDRs, of the antibody G193 (for lewis Y), see Scott AM et al, Cancer Res 60: 3254-61 (2000), also as described in Neeson et al, J Immunol May 2013190 (Meeting Abstract Supplement) 177.10.

20 In one embodiment, an antigen binding domain against GM3 is an antigen binding portion, e.g., CDRs, of the antibody CA 2523449 (mAb 14F7).

In one embodiment, an antigen binding domain against HMWMAA is an antigen binding portion, e.g., CDRs, of an antibody described in, e.g., Kmiecik et al., Oncoimmunology 3(1):e27185 (2014) (PMID: 24575382) (mAb9.2.27); US 6528481; WO2010033866; or US 20140004124.

25 In one embodiment, an antigen binding domain against o-acetyl-GD2 is an antigen binding portion, e.g., CDRs, of the antibody 8B6.

In one embodiment, an antigen binding domain against TEM1/CD248 is an antigen binding portion, e.g., CDRs, of an antibody described in, e.g., Marty et al., Cancer Lett 235(2):298-308 (2006); Zhao et al., J Immunol Methods 363(2):221-232 (2011).

30 In one embodiment, an antigen binding domain against CLDN6 is an antigen binding portion, e.g., CDRs, of the antibody IMAB027 (Ganymed Pharmaceuticals), see e.g., clinicaltrial.gov/show/NCT02054351.

In one embodiment, an antigen binding domain against TSHR is an antigen binding portion, e.g., CDRs, of an antibody described in, e.g., US 8,603,466; US 8,501,415; or US 8,309,693.

35 In one embodiment, an antigen binding domain against GPRC5D is an antigen binding portion, e.g., CDRs, of the antibody FAB6300A (R&D Systems); or LS-A4180 (Lifespan Biosciences). In one embodiment, an antigen binding domain against CD97 is an antigen binding portion, e.g., CDRs, of an antibody described in, e.g., US 6,846,911;de Groot et al., J Immunol 183(6):4127-4134 (2009); or an antibody from R&D:MAB3734.

In one embodiment, an antigen binding domain against ALK is an antigen binding portion, e.g., 5 CDRs, of an antibody described in, e.g., Mino-Kenudson et al., Clin Cancer Res 16(5):1561-1571 (2010).

In one embodiment, an antigen binding domain against polysialic acid is an antigen binding portion, e.g., CDRs, of an antibody described in, e.g., Nagae et al., J Biol Chem 288(47):33784-33796 (2013).

In one embodiment, an antigen binding domain against PLAC1 is an antigen binding portion, e.g., CDRs, of an antibody described in, e.g., Ghods et al., Biotechnol Appl Biochem 2013 doi:10.1002/bab.1177. 10 In one embodiment, an antigen binding domain against GloboH is an antigen binding portion of the antibody VK9; or an antibody described in, e.g., Kudryashov V et al, Glycoconj J.15(3):243-9 ( 1998), Lou et al., Proc Natl Acad Sci USA 111(7):2482-2487 (2014) ; MBr1: Bremer E-G et al. J Biol Chem 259:14773–14777 (1984).

In one embodiment, an antigen binding domain against NY-BR-1 is an antigen binding portion,15 e.g., CDRs of an antibody described in, e.g., Jager et al., Appl Immunohistochem Mol Morphol 15(1):77- 83 (2007).

In one embodiment, an antigen binding domain against WT-1 is an antigen binding portion, e.g., CDRs, of an antibody described in, e.g., Dao et al., Sci Transl Med 5(176):176ra33 (2013); or WO2012/135854.

20 In one embodiment, an antigen binding domain against MAGE-A1 is an antigen binding portion, e.g., CDRs, of an antibody described in, e.g., Willemsen et al., J Immunol 174(12):7853-7858 (2005) (TCR- like scFv).

In one embodiment, an antigen binding domain against sperm protein 17 is an antigen binding portion, e.g., CDRs, of an antibody described in, e.g., Song et al., Target Oncol 2013 Aug 14 (PMID: 25 23943313); Song et al., Med Oncol 29(4):2923-2931 (2012).

In one embodiment, an antigen binding domain against Tie 2 is an antigen binding portion, e.g., CDRs, of the antibody AB33 (Cell Signaling Technology).

In one embodiment, an antigen binding domain against MAD-CT-2 is an antigen binding portion, e.g., CDRs, of an antibody described in, e.g., PMID: 2450952; US 7635753.

30 In one embodiment, an antigen binding domain against Fos-related antigen 1 is an antigen binding portion, e.g., CDRs, of the antibody 12F9 (Novus Biologicals).

In one embodiment, an antigen binding domain against MelanA/MART1 is an antigen binding portion, e.g., CDRs, of an antibody described in, EP2514766 A2; or US 7,749,719.

In one embodiment, an antigen binding domain against sarcoma translocation breakpoints is an35 antigen binding portion, e.g., CDRs, of an antibody described in, e.g., Luo et al, EMBO Mol. Med.4(6):453- 461 (2012). In one embodiment, an antigen binding domain against TRP-2 is an antigen binding portion, e.g., CDRs, of an antibody described in, e.g., Wang et al, J Exp Med.184(6):2207-16 (1996).

In one embodiment, an antigen binding domain against CYP1B1 is an antigen binding portion, e.g., CDRs, of an antibody described in, e.g., Maecker et al, Blood 102 (9): 3287-3294 (2003).

5 In one embodiment, an antigen binding domain against RAGE-1 is an antigen binding portion, e.g., CDRs, of the antibody MAB5328 (EMD Millipore).

In one embodiment, an antigen binding domain against human telomerase reverse transcriptase is an antigen binding portion, e.g., CDRs, of the antibody cat no: LS-B95-100 (Lifespan Biosciences)

In one embodiment, an antigen binding domain against intestinal carboxyl esterase is an antigen 10 binding portion, e.g., CDRs, of the antibody 4F12: cat no: LS-B6190-50 (Lifespan Biosciences).

In one embodiment, an antigen binding domain against mut hsp70-2 is an antigen binding portion, e.g., CDRs, of the antibody Lifespan Biosciences: monoclonal: cat no: LS-C133261-100 (Lifespan Biosciences).

In one embodiment, an antigen binding domain against CD79a is an antigen binding portion, e.g., 15 CDRs, of the antibody Anti-CD79a antibody [HM47/A9] (ab3121), available from Abcam; antibody CD79A Antibody #3351 available from Cell Signaling Technology; or antibody HPA017748 - Anti- CD79A antibody produced in rabbit, available from Sigma Aldrich.

In one embodiment, an antigen binding domain against CD79b is an antigen binding portion, e.g., CDRs, of the antibody polatuzumab vedotin, anti-CD79b described in Dornan et al.,“Therapeutic potential 20 of an anti-CD79b antibody-drug conjugate, anti-CD79b-vc-MMAE, for the treatment of non-Hodgkin lymphoma” Blood.2009 Sep 24;114(13):2721-9. doi: 10.1182/blood-2009-02-205500. Epub 2009 Jul 24, or the bispecific antibody Anti-CD79b/CD3 described in“4507 Pre-Clinical Characterization of T Cell- Dependent Bispecific Antibody Anti-CD79b/CD3 As a Potential Therapy for B Cell Malignancies” Abstracts of 56 ^th ASH Annual Meeting and Exposition, San Francisco, CA December 6-92014.

25 In one embodiment, an antigen binding domain against CD72 is an antigen binding portion, e.g., CDRs, of the antibody J3-109 described in Myers, and Uckun,“An anti-CD72 immunotoxin against therapy-refractory B-lineage acute lymphoblastic leukemia.” Leuk Lymphoma.1995 Jun;18(1-2):119-22, or anti-CD72 (10D6.8.1, mIgG1) described in Polson et al.,“Antibody-Drug Conjugates for the Treatment of Non–Hodgkin's Lymphoma: Target and Linker-Drug Selection” Cancer Res March 15, 200969; 2358. 30 In one embodiment, an antigen binding domain against LAIR1 is an antigen binding portion, e.g., CDRs, of the antibody ANT-301 LAIR1 antibody, available from ProSpec; or anti-human CD305 (LAIR1) Antibody, available from BioLegend.

In one embodiment, an antigen binding domain against FCAR is an antigen binding portion, e.g., CDRs, of the antibody CD89/FCARAntibody (Catalog#10414-H08H), available from Sino Biological Inc. 35 In one embodiment, an antigen binding domain against LILRA2 is an antigen binding portion, e.g., CDRs, of the antibody LILRA2 monoclonal antibody (M17), clone 3C7, available from Abnova, or Mouse Anti-LILRA2 antibody, Monoclonal (2D7), available from Lifespan Biosciences.. In one embodiment, an antigen binding domain against CD300LF is an antigen binding portion, e.g., CDRs, of the antibody Mouse Anti-CMRF35-like molecule 1 antibody, Monoclonal[UP-D2], available from BioLegend, or Rat Anti-CMRF35-like molecule 1 antibody, Monoclonal[234903], available from R&D Systems.

5 In one embodiment, an antigen binding domain against CLEC12A is an antigen binding portion, e.g., CDRs, of the antibody Bispecific T cell Engager (BiTE) scFv-antibody and ADC described in Noordhuis et al.,“Targeting of CLEC12A In Acute Myeloid Leukemia by Antibody-Drug-Conjugates and Bispecific CLL-1xCD3 BiTE Antibody” 53 ^rd ASH Annual Meeting and Exposition, December 10-13, 2011, and MCLA-117 (Merus).

10 In one embodiment, an antigen binding domain against BST2 (also called CD317) is an antigen binding portion, e.g., CDRs, of the antibody Mouse Anti-CD317 antibody, Monoclonal[3H4], available from Antibodies-Online or Mouse Anti-CD317 antibody, Monoclonal[696739], available from R&D Systems.

In one embodiment, an antigen binding domain against EMR ₂ (also called CD312) is an antigen 15 binding portion, e.g., CDRs, of the antibody Mouse Anti-CD312 antibody, Monoclonal[LS-B8033] available from Lifespan Biosciences, or Mouse Anti-CD312 antibody, Monoclonal[494025] available from R&D Systems.

In one embodiment, an antigen binding domain against LY75 is an antigen binding portion, e.g., CDRs, of the antibody Mouse Anti-Lymphocyte antigen 75 antibody, Monoclonal[HD30] available from 20 EMD Millipore or Mouse Anti-Lymphocyte antigen 75 antibody, Monoclonal[A15797] available from Life Technologies.

In one embodiment, an antigen binding domain against GPC3 is an antigen binding portion, e.g., CDRs, of the antibody hGC33 described in Nakano K, Ishiguro T, Konishi H, et al. Generation of a humanized anti-glypican 3 antibody by CDR grafting and stability optimization. Anticancer Drugs.2010 25 Nov;21(10):907–916, or MDX-1414, HN3, or YP7, all three of which are described in Feng et al., “Glypican-3 antibodies: a new therapeutic target for liver cancer.” FEBS Lett.2014 Jan 21;588(2):377-82.

In one embodiment, an antigen binding domain against FCRL5 is an antigen binding portion, e.g., CDRs, of the anti-FcRL5 antibody described in Elkins et al.,“FcRL5 as a target of antibody-drug conjugates for the treatment of multiple myeloma” Mol Cancer Ther.2012 Oct;11(10):2222-32. In one 30 embodiment, an antigen binding domain against FCRL5 is an antigen binding portion, e.g., CDRs, of the anti-FcRL5 antibody described in, for example, WO2001/038490, WO/2005/117986, WO2006/039238, WO2006/076691, WO2010/114940, WO2010/120561, or WO2014/210064.

In one embodiment, an antigen binding domain against IGLL1 is an antigen binding portion, e.g., CDRs, of the antibody Mouse Anti-Immunoglobulin lambda-like polypeptide 1 antibody,

35 Monoclonal[AT1G4] available from Lifespan Biosciences, Mouse Anti-Immunoglobulin lambda-like polypeptide 1 antibody, Monoclonal[HSL11] available from BioLegend. In one embodiment, the antigen binding domain comprises one, two three (e.g., all three) heavy chain CDRs, HC CDR1, HC CDR ₂ and HC CDR3, from an antibody listed above, and/or one, two, three (e.g., all three) light chain CDRs, LC CDR1, LC CDR ₂ and LC CDR3, from an antibody listed above. In one embodiment, the antigen binding domain comprises a heavy chain variable region and/or a variable 5 light chain region of an antibody listed above.

In another aspect, the antigen binding domain comprises a humanized antibody or an antibody fragment. In some aspects, a non-human antibody is humanized, where specific sequences or regions of the antibody are modified to increase similarity to an antibody naturally produced in a human or fragment thereof. In one aspect, the antigen binding domain is humanized.

10 In an embodiment, the antigen-binding domain of a CAR, e.g., a CAR expressed by a cell of the disclosure, binds to CD19. CD19 is found on B cells throughout differentiation of the lineage from the pro/pre-B cell stage through the terminally differentiated plasma cell stage. In an embodiment, the antigen binding domain is a murine scFv domain that binds to human CD19, e.g., the antigen binding domain of CTL019 (e.g., SEQ ID NO: 218). In an embodiment, the antigen binding domain is a humanized antibody 15 or antibody fragment, e.g., scFv domain, derived from the murine CTL019 scFv. In an embodiment, the antigen binding domain is a human antibody or antibody fragment that binds to human CD19. Exemplary scFv domains (and their sequences, e.g., CDRs, VL and VH sequences) that bind to CD19 are provided in Table 12a. The scFv domain sequences provided in Table 12a include a light chain variable region (VL) and a heavy chain variable region (VH). The VL and VH are attached by a linker comprising the 20 sequence GGGGSGGGGSGGGGS (SEQ ID NO: 216), e.g., in the following orientation: VL-linker-VH.

Table 12a. Antigen Binding domains that bind CD19

The sequences of the CDR sequences of the scFv domains of the CD19 antigen binding domains provided in Table 12a are shown in Table 12b for the heavy chain variable domains and in Table 12c for the light chain variable domains.“ID” stands for the respective SEQ ID NO for each CDR.

Table 12b. Heavy Chain Variable Domain CDRs

5 Table 12c. Light Chain Variable Domain CDRs

In an embodiment, the antigen binding domain comprises an anti-CD19 antibody, or fragment thereof, e.g., a scFv. For example, the antigen binding domain comprises a variable heavy chain and a variable light chain listed in Table 12d. The linker sequence joining the variable heavy and variable light chains can be any of the linker sequences described herein, or alternatively, can be 5 GSTSGSGKPGSGEGSTKG (SEQ ID NO: 233). The light chain variable region and heavy chain variable region of a scFv can be, e.g., in any of the following orientations: light chain variable region-linker-heavy chain variable region or heavy chain variable region-linker-light chain variable region.

Table 12d. Additional Anti-CD19 antibody binding domains

In one embodiment, the CD19 binding domain comprises one or more (e.g., all three) light chain 10 complementary determining region 1 (LC CDR1), light chain complementary determining region 2 (LC CDR ₂ ), and light chain complementary determining region 3 (LC CDR3) of a CD19 binding domain described herein, e.g., provided in Table 12a or 15, and/or one or more (e.g., all three) heavy chain complementary determining region 1 (HC CDR1), heavy chain complementary determining region 2 (HC CDR ₂ ), and heavy chain complementary determining region 3 (HC CDR3) of a CD19 binding domain 15 described herein, e.g., provided in Table 12a or 16. In one embodiment, the CD19 binding domain comprises one, two, or all of LC CDR1, LC CDR ₂ , and LC CDR3 of any amino acid sequences as provided in Table 12c, incorporated herein by reference; and one, two or all of HC CDR1, HC CDR ₂ , and HC CDR3 of any amino acid sequences as provided in Table 12b. Any known CD19 CAR, e.g., the CD19 antigen binding domain of any known CD19 CAR, in the art can be used in accordance with the instant disclosure to construct a CAR. For example, LG-740; CD19 CAR described in the US Pat. No. 8,399,645; US Pat. No. 7,446,190; Xu et al., Leuk Lymphoma.2013 54(2):255-260(2012); Cruz et al., Blood 122(17):2965-2973 (2013); Brentjens et al., Blood, 118(18):4817- 5 4828 (2011); Kochenderfer et al., Blood 116(20):4099-102 (2010); Kochenderfer et al., Blood 122 (25):4129-39(2013); and 16th Annu Meet Am Soc Gen Cell Ther (ASGCT) (May 15-18, Salt Lake City) 2013, Abst 10. In one embodiment, an antigen binding domain against CD19 is an antigen binding portion, e.g., CDRs, of a CAR, antibody or antigen-binding fragment thereof described in, e.g., PCT publication WO2012/079000; PCT publication WO2014/153270; Kochenderfer, J.N. et al., J. Immunother.32 (7), 689- 10 702 (2009); Kochenderfer, J.N., et al., Blood, 116 (20), 4099-4102 (2010); PCT publication WO2014/031687; Bejcek, Cancer Research, 55, 2346-2351, 1995; or U.S. Patent No.7,446,190.

In an embodiment, the antigen-binding domain of CAR, e.g., a CAR expressed by a cell of the disclosure, binds to BCMA. BCMA is found preferentially expressed in mature B lymphocytes. In an embodiment, the antigen binding domain is a murine scFv domain that binds to human BCMA. In an 15 embodiment, the antigen binding domain is a humanized antibody or antibody fragment, e.g., scFv domain that binds human BCMA. In an embodiment, the antigen binding domain is a human antibody or antibody fragment that binds to human BCMA. In embodiments, exemplary BCMA CAR constructs are generated using the VH and VL sequences from PCT Publication WO2012/0163805 (the contents of which are hereby incorporated by reference in its entirety). In embodiments, additional exemplary BCMA CAR constructs 20 are generated using the VH and VL sequences from PCT Publication WO2016/014565 (the contents of which are hereby incorporated by reference in its entirety). In embodiments, additional exemplary BCMA CAR constructs are generated using the VH and VL sequences from PCT Publication WO2014/122144 (the contents of which are hereby incorporated by reference in its entirety). In embodiments, additional exemplary BCMA CAR constructs are generated using the CAR molecules, and/or the VH and VL 25 sequences from PCT Publication WO2016/014789 (the contents of which are hereby incorporated by reference in its entirety). In embodiments, additional exemplary BCMA CAR constructs are generated using the CAR molecules, and/or the VH and VL sequences from PCT Publication WO2014/089335 (the contents of which are hereby incorporated by reference in its entirety). In embodiments, additional exemplary BCMA CAR constructs are generated using the CAR molecules, and/or the VH and VL 30 sequences from PCT Publication WO2014/140248 (the contents of which are hereby incorporated by reference in its entirety).

Any known BCMA CAR, e.g., the BMCA antigen binding domain of any known BCMA CAR, in the art can be used in accordance with the instant disclosure. For example, those described herein.

Exemplary CAR Molecules

35 In one aspect, a CAR, e.g., a CAR expressed by the cell of the disclosure, comprises a CAR molecule comprising an antigen binding domain that binds to a B cell antigen, e.g., as described herein, such as CD19 or BCMA. In one embodiment, the CAR comprises a CAR molecule comprising a CD19 antigen binding domain (e.g., a murine, human or humanized antibody or antibody fragment that specifically binds to CD19), a transmembrane domain, and an intracellular signaling domain (e.g., an intracellular signaling domain comprising a costimulatory domain and/or a primary signaling domain).

5 Exemplary CAR molecules described herein are provided in Table 12e. The CAR molecules in Table 12e comprise a CD19 antigen binding domain, e.g., an amino acid sequence of any CD19 antigen binding domain provided in Table 12a.

Table 12e. Exemplary CD19 CAR molecules

In one aspect, a CAR, e.g., a CAR expressed by the cell of the disclosure, comprises a CAR molecule comprising an antigen binding domain that binds to BCMA, e.g., comprises a BCMA antigen binding domain (e.g., a murine, human or humanized antibody or antibody fragment that specifically binds to BCMA, e.g., human BCMA), a transmembrane domain, and an intracellular signaling domain (e.g., an 5 intracellular signaling domain comprising a costimulatory domain and/or a primary signaling domain).

Exemplary CAR molecules of a CAR described herein are provided in Table 1 of WO2016/014565, which is incorporated by reference herein.

Transmembrane domains

With respect to the transmembrane domain, in various embodiments, a CAR can be designed to 10 comprise a transmembrane domain that is attached to the extracellular domain of the CAR. A transmembrane domain can include one or more additional amino acids adjacent to the transmembrane region, e.g., one or more amino acid associated with the extracellular region of the protein from which the transmembrane was derived (e.g., 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 up to 15 amino acids of the extracellular region) and/or one or more additional amino acids associated with the intracellular region of the protein from which 15 the transmembrane protein is derived (e.g., 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 up to 15 amino acids of the intracellular region). In one aspect, the transmembrane domain is one that is associated with one of the other domains of the CAR e.g., in one embodiment, the transmembrane domain may be from the same protein that the signaling domain, costimulatory domain or the hinge domain is derived from. In another aspect, the transmembrane domain is not derived from the same protein that any other domain of the CAR is derived 20 from. In some instances, the transmembrane domain can be selected or modified by amino acid substitution to avoid binding of such domains to the transmembrane domains of the same or different surface membrane proteins, e.g., to minimize interactions with other members of the receptor complex. In one aspect, the transmembrane domain is capable of homodimerization with another CAR on the cell surface of a CAR- expressing cell. In a different aspect, the amino acid sequence of the transmembrane domain may be 5 modified or substituted so as to minimize interactions with the binding domains of the native binding partner present in the same CAR-expressing cell.

The transmembrane domain may be derived either from a natural or from a recombinant source. Where the source is natural, the domain may be derived from any membrane-bound or transmembrane protein. In one aspect, the transmembrane domain is capable of signaling to the intracellular domain(s) 10 whenever the CAR has bound to a target. A transmembrane domain of particular use in this disclosure may include at least the transmembrane region(s) of e.g., the alpha, beta or zeta chain of the T-cell receptor, CD28, CD27, CD3 epsilon, CD45, CD4, CD5, CD8, CD9, CD16, CD22, CD33, CD37, CD64, CD80, CD86, CD134, CD137, CD154. In some embodiments, a transmembrane domain may include at least the transmembrane region(s) of, e.g., KIRDS2, OX40, CD2, CD27, LFA-1 (CD11a, CD18), ICOS (CD278), 15 4-1BB (CD137), GITR, CD40, BAFFR, HVEM (LIGHTR), SLAMF7, NKp80 (KLRF1), NKp44, NKp30, NKp46, CD160, CD19, IL2R beta, IL2R gamma, IL7R a, ITGA1, VLA1, CD49a, ITGA4, IA4, CD49D, ITGA6, VLA-6, CD49f, ITGAD, CD11d, ITGAE, CD103, ITGAL, CD11a, LFA-1, ITGAM, CD11b, ITGAX, CD11c, ITGB1, CD29, ITGB2, CD18, LFA-1, ITGB7, TNFR ₂ , DNAM1 (CD226), SLAMF4 (CD244, 2B4), CD84, CD96 (Tactile), CEACAM1, CRTAM, Ly9 (CD229), CD160 (BY55), PSGL1, 20 CD100 (SEMA4D), SLAMF6 (NTB-A, Ly108), SLAM (SLAMF1, CD150, IPO-3), BLAME (SLAMF8), SELPLG (CD162), LTBR, PAG/Cbp, NKG2D, NKG2C.

In some instances, the transmembrane domain can be attached to the extracellular region of the CAR, e.g., the antigen binding domain of the CAR, via a hinge, e.g., a hinge from a human protein. For example, in one embodiment, the hinge can be a human Ig (immunoglobulin) hinge (e.g., an IgG4 hinge, 25 an IgD hinge), a GS linker (e.g., a GS linker described herein), a KIR ₂ DS2 hinge or a CD8a hinge. In one embodiment, the hinge or spacer comprises (e.g., consists of) the amino acid sequence of SEQ ID NO: 250. In one aspect, the transmembrane domain comprises (e.g., consists of) a transmembrane domain of SEQ ID NO: 251.

In certain embodiments, the encoded transmembrane domain comprises an amino acid sequence of 30 a CD8 transmembrane domain having at least one, two or three modifications but not more than 20, 10 or 5 modifications of the amino acid sequence of SEQ ID NO: 251, or a sequence with at least 95% identity to the amino acid sequence of SEQ ID NO: 251. In one embodiment, the encoded transmembrane domain comprises the sequence of SEQ ID NO: 251.

In other embodiments, the nucleic acid molecule encoding the CAR comprises a nucleotide 35 sequence of a CD8 transmembrane domain, e.g., comprising the sequence of SEQ ID NO: 252 or SEQ ID NO: 289, or a sequence with at least 95% identity thereof. In certain embodiments, the encoded antigen binding domain is connected to the transmembrane domain by a hinge region. In one embodiment, the encoded hinge region comprises the amino acid sequence of a CD8 hinge, e.g., SEQ ID NO: 250; or the amino acid sequence of an IgG4 hinge, e.g., SEQ ID NO: 253 or a sequence with at least 95% identity to SEQ ID NO: 250 or SEQ ID NO: 253. In other embodiments, 5 the nucleic acid sequence encoding the hinge region comprises the sequence of SEQ ID NO: 254 or SEQ ID NO: 255, corresponding to a CD8 hinge or an IgG4 hinge, respectively, or a sequence with at least 95% identity to SEQ ID NO: 254 or 255.

In one aspect, the hinge or spacer comprises an IgG4 hinge. For example, in one embodiment, the hinge or spacer comprises a hinge of the amino acid sequence10 ESKYGPPCPPCPAPEFLGGPSVFLFPPKPKDTLMISRTPEVTCVVVDVSQEDPEVQFNWY VDGVE VHNAKTKPREEQFNSTYRVVSVLTVLHQDWLNGKEYKCKVSNKGLPSSIEKTISKAKGQP REPQ VYTLPPSQEEMTKNQVSLTCLVKGFYPSDIAVEWESNGQPENNYKTTPPVLDSDGSFFLY SRLTV DKSRWQEGNVFSCSVMHEALHNHYTQKSLSLSLGKM (SEQ ID NO: 253). In some embodiments, the hinge or spacer comprises a hinge encoded by the nucleotide sequence of15 GAGAGCAAGTACGGCCCTCCCTGCCCCCCTTGCCCTGCCCCCGAGTTCCTGGGCGGACCC AG CGTGTTCCTGTTCCCCCCCAAGCCCAAGGACACCCTGATGATCAGCCGGACCCCCGAGGT GA CCTGTGTGGTGGTGGACGTGTCCCAGGAGGACCCCGAGGTCCAGTTCAACTGGTACGTGG AC GGCGTGGAGGTGCACAACGCCAAGACCAAGCCCCGGGAGGAGCAGTTCAATAGCACCTAC C GGGTGGTGTCCGTGCTGACCGTGCTGCACCAGGACTGGCTGAACGGCAAGGAATACAAGT G

20 TAAGGTGTCCAACAAGGGCCTGCCCAGCAGCATCGAGAAAACCATCAGCAAGGCCAAGGG C CAGCCTCGGGAGCCCCAGGTGTACACCCTGCCCCCTAGCCAAGAGGAGATGACCAAGAAC C AGGTGTCCCTGACCTGCCTGGTGAAGGGCTTCTACCCCAGCGACATCGCCGTGGAGTGGG AG AGCAACGGCCAGCCCGAGAACAACTACAAGACCACCCCCCCTGTGCTGGACAGCGACGGC A GCTTCTTCCTGTACAGCCGGCTGACCGTGGACAAGAGCCGGTGGCAGGAGGGCAACGTCT TT

25 AGCTGCTCCGTGATGCACGAGGCCCTGCACAACCACTACACCCAGAAGAGCCTGAGCCTG TC CCTGGGCAAGATG (SEQ ID NO: 255).

In one aspect, the hinge or spacer comprises an IgD hinge. For example, in one embodiment, the hinge or spacer comprises a hinge of the amino acid sequence of RWPESPKAQASSVPTAQPQAEGSLAKATTAPATTRNTGRGGEEKKKEKEKEEQEERETKT PECP

30 SHTQPLGVYLLTPAVQDLWLRDKATFTCFVVGSDLKDAHLTWEVAGKVPTGGVEEGLLER HSN GSQSQHSRLTLPRSLWNAGTSVTCTLNHPSLPPQRLMALREPAAQAPVKLSLNLLASSDP PEAAS WLLCEVSGFSPPNILLMWLEDQREVNTSGFAPARPPPQPGSTTFWAWSVLRVPAPPSPQP ATYTC VVSHEDSRTLLNASRSLEVSYVTDH (SEQ ID NO: 256). In some embodiments, the hinge or spacer comprises a hinge encoded by the nucleotide sequence of35 AGGTGGCCCGAAAGTCCCAAGGCCCAGGCATCTAGTGTTCCTACTGCACAGCCCCAGGCA G AAGGCAGCCTAGCCAAAGCTACTACTGCACCTGCCACTACGCGCAATACTGGCCGTGGCG G GGAGGAGAAGAAAAAGGAGAAAGAGAAAGAAGAACAGGAAGAGAGGGAGACCAAGACCC CTGAATGTCCATCCCATACCCAGCCGCTGGGCGTCTATCTCTTGACTCCCGCAGTACAGG AC TTGTGGCTTAGAGATAAGGCCACCTTTACATGTTTCGTCGTGGGCTCTGACCTGAAGGAT GC CCATTTGACTTGGGAGGTTGCCGGAAAGGTACCCACAGGGGGGGTTGAGGAAGGGTTGCT G GAGCGCCATTCCAATGGCTCTCAGAGCCAGCACTCAAGACTCACCCTTCCGAGATCCCTG TG

5 GAACGCCGGGACCTCTGTCACATGTACTCTAAATCATCCTAGCCTGCCCCCACAGCGTCT GA TGGCCCTTAGAGAGCCAGCCGCCCAGGCACCAGTTAAGCTTAGCCTGAATCTGCTCGCCA GT AGTGATCCCCCAGAGGCCGCCAGCTGGCTCTTATGCGAAGTGTCCGGCTTTAGCCCGCCC AA CATCTTGCTCATGTGGCTGGAGGACCAGCGAGAAGTGAACACCAGCGGCTTCGCTCCAGC CC GGCCCCCACCCCAGCCGGGTTCTACCACATTCTGGGCCTGGAGTGTCTTAAGGGTCCCAG CA

10 CCACCTAGCCCCCAGCCAGCCACATACACCTGTGTTGTGTCCCATGAAGATAGCAGGACC CT GCTAAATGCTTCTAGGAGTCTGGAGGTTTCCTACGTGACTGACCATT (SEQ ID NO: 257).

In one aspect, the transmembrane domain may be recombinant, in which case it will comprise predominantly hydrophobic residues such as leucine and valine. In one aspect a triplet of phenylalanine, tryptophan and valine can be found at each end of a recombinant transmembrane domain.

15 Optionally, a short oligo- or polypeptide linker, between 2 and 10 amino acids in length may form the linkage between the transmembrane domain and the cytoplasmic region of the CAR. A glycine-serine doublet provides a particularly suitable linker. For example, in one aspect, the linker comprises the amino acid sequence of GGGGSGGGGS (SEQ ID NO: 258). In some embodiments, the linker is encoded by the nucleotide sequence of GGTGGCGGAGGTTCTGGAGGTGGAGGTTCC (SEQ ID NO: 259).

20 In one aspect, the hinge or spacer comprises a KIR ₂ DS2 hinge.

Signaling domains

In embodiments of the disclosure having an intracellular signaling domain, such a domain can contain, e.g., one or more of a primary signaling domain and/or a costimulatory signaling domain. In some embodiments, the intracellular signaling domain comprises a sequence encoding a primary signaling 25 domain. In some embodiments, the intracellular signaling domain comprises a costimulatory signaling domain. In some embodiments, the intracellular signaling domain comprises a primary signaling domain and a costimulatory signaling domain.

The intracellular signaling sequences within the cytoplasmic portion of the CAR of the disclosure may be linked to each other in a random or specified order. Optionally, a short oligo- or polypeptide linker, 30 for example, between 2 and 10 amino acids (e.g., 2, 3, 4, 5, 6, 7, 8, 9, or 10 amino acids) in length may form the linkage between intracellular signaling sequences. In one embodiment, a glycine-serine doublet can be used as a suitable linker. In one embodiment, a single amino acid, e.g., an alanine, a glycine, can be used as a suitable linker.

In one aspect, the intracellular signaling domain is designed to comprise two or more, e.g., 2, 3, 4, 35 5, or more, costimulatory signaling domains. In an embodiment, the two or more, e.g., 2, 3, 4, 5, or more, costimulatory signaling domains, are separated by a linker molecule, e.g., a linker molecule described herein. In one embodiment, the intracellular signaling domain comprises two costimulatory signaling domains. In some embodiments, the linker molecule is a glycine residue. In some embodiments, the linker is an alanine residue.

Primary Signaling domains

A primary signaling domain regulates primary activation of the TCR complex either in a 5 stimulatory way, or in an inhibitory way. Primary intracellular signaling domains that act in a stimulatory manner may contain signaling motifs, which are known as immunoreceptor tyrosine-based activation motifs or ITAMs.

Examples of ITAM containing primary intracellular signaling domains that are of particular use in the disclosure include those of CD3 zeta, common FcR gamma (FCER1G), Fc gamma RIIa, FcR beta (Fc 10 Epsilon R1b), CD3 gamma, CD3 delta, CD3 epsilon, CD79a, CD79b, DAP10, and DAP12. In one embodiment, a CAR of the disclosure comprises an intracellular signaling domain, e.g., a primary signaling domain of CD3-zeta.

In one embodiment, the encoded primary signaling domain comprises a functional signaling domain of CD3 zeta. The encoded CD3 zeta primary signaling domain can comprise an amino acid 15 sequence having at least one, two or three modifications but not more than 20, 10 or 5 modifications of the amino acid sequence of SEQ ID NO: 260 or SEQ ID NO: 261, or a sequence with at least 95% identity to the amino acid sequence of SEQ ID NO: 260 or SEQ ID NO: 261. In some embodiments, the encoded primary signaling domain comprises the sequence of SEQ ID NO: 260 or SEQ ID NO: 261. In other embodiments, the nucleic acid sequence encoding the primary signaling domain comprises the sequence of 20 SEQ ID NO: 262, SEQ ID NO: 291, or SEQ ID NO: 263, or a sequence with at least 95% identity thereof.

Costimulatory Signaling Domains

In some embodiments, the encoded intracellular signaling domain comprises a costimulatory signaling domain. For example, the intracellular signaling domain can comprise a primary signaling domain and a costimulatory signaling domain. In some embodiments, the encoded costimulatory signaling domain 25 comprises a functional signaling domain of a protein chosen from one or more of CD27, CD28, 4-1BB (CD137), OX40, CD30, CD40, PD-1, ICOS, lymphocyte function-associated antigen-1 (LFA-1), CD2, CD7, LIGHT, NKG2C, B7-H3, a ligand that specifically binds with CD83, CDS, ICAM-1, GITR, BAFFR, HVEM (LIGHTR), SLAMF7, NKp80 (KLRF1), CD160, CD19, CD4, CD8alpha, CD8beta, IL2R beta, IL2R gamma, IL7R alpha, ITGA4, VLA1, CD49a, ITGA4, IA4, CD49D, ITGA6, VLA-6, CD49f, ITGAD, 30 CD11d, ITGAE, CD103, ITGAL, CD11a, LFA-1, ITGAM, CD11b, ITGAX, CD11c, ITGB1, CD29, ITGB2, CD18, LFA-1, ITGB7, TNFR ₂ , TRANCE/RANKL, DNAM1 (CD226), SLAMF4 (CD244, 2B4), CD84, CD96 (Tactile), CEACAM1, CRTAM, Ly9 (CD229), CD160 (BY55), PSGL1, CD100 (SEMA4D), CD69, SLAMF6 (NTB-A, Ly108), SLAM (SLAMF1, CD150, IPO-3), BLAME (SLAMF8), SELPLG (CD162), LTBR, LAT, GADS, SLP-76, PAG/Cbp, NKp44, NKp30, NKp46, or NKG2D.

35 In certain embodiments, the encoded costimulatory signaling domain comprises an amino acid sequence having at least one, two or three modifications but not more than 20, 10 or 5 modifications of the amino acid sequence of SEQ ID NO: 264 or SEQ ID NO: 265, or a sequence with at least 95% identity to the amino acid sequence of SEQ ID NO: 264 or SEQ ID NO: 265. In one embodiment, the encoded costimulatory signaling domain comprises the sequence of SEQ ID NO: 264 or SEQ ID NO: 265. In other embodiments, the nucleic acid sequence encoding the costimulatory signaling domain comprises the sequence of SEQ ID NO: 266, SEQ ID NO: 290, or SEQ ID NO: 267, or a sequence with at least 95% 5 identity thereof.

In other embodiments, the encoded intracellular domain comprises the sequence of SEQ ID NO: 264 or SEQ ID NO: 265 and the sequence of SEQ ID NO: 260 or SEQ ID NO: 261, wherein the sequences comprising the intracellular signaling domain are expressed in the same frame and as a single polypeptide chain.

10 In certain embodiments, the nucleic acid sequence encoding the intracellular signaling domain comprises the sequence of SEQ ID NO: 266, SEQ ID NO: 290, or SEQ ID NO: 267, or a sequence with at least 95% identity thereof, and the sequence of SEQ ID NO: 262, SEQ ID NO: 291, or SEQ ID NO: 263, or a sequence with at least 95% identity thereof.

In some embodiments, the nucleic acid molecule further encodes a leader sequence. In one 15 embodiment, the leader sequence comprises the sequence of SEQ ID NO: 268.

In one aspect, the intracellular signaling domain is designed to comprise the signaling domain of CD3-zeta and the signaling domain of CD28. In one aspect, the intracellular signaling domain is designed to comprise the signaling domain of CD3-zeta and the signaling domain of 4-1BB. In one aspect, the signaling domain of 4-1BB is a signaling domain of SEQ ID NO: 264. In one aspect, the signaling domain 20 of CD3-zeta is a signaling domain of SEQ ID NO: 260.

In one aspect, the intracellular signaling domain is designed to comprise the signaling domain of CD3-zeta and the signaling domain of CD27. In one aspect, the signaling domain of CD27 comprises the amino acid sequence of QRRKYRSNKGESPVEPAEPCRYSCPREEEGSTIPIQEDYRKPEPACSP (SEQ ID NO: 265). In one aspect, the signaling domain of CD27 is encoded by the nucleic acid sequence of25 Caacgaaggaaatatagatcaaacaaaggagaaagtcctgtggagcctgcagagccttgt cgttacagctgccccagggaggaggagggcagcacc atccccatccaggaggattaccgaaaaccggagcctgcctgctccccc (SEQ ID NO: 267).

Vectors

In another aspect, the disclosure pertains to a vector comprising a nucleic acid sequence encoding a CAR described herein. In one embodiment, the vector is chosen from a DNA vector, an RNA vector, a 30 plasmid, a lentivirus vector, adenoviral vector, or a retrovirus vector. In one embodiment, the vector is a lentivirus vector. These vectors or portions thereof may, among other things, be used to create template nucleic acids, as described herein for use with the CRISPR systems as described herein. Alternatively, the vectors may be used to deliver nucleic acid directly to the cell, e.g., the immune effector cell, e.g., the T cell, e.g., the allogeneic T cell, independent of the CRISPR system.

35 The present disclosure also provides vectors in which a DNA of the present disclosure is inserted.

Vectors derived from retroviruses such as the lentivirus are suitable tools to achieve long-term gene transfer since they allow long-term, stable integration of a transgene and its propagation in daughter cells. Lentiviral vectors have the added advantage over vectors derived from onco-retroviruses such as murine leukemia viruses in that they can transduce non-proliferating cells, such as hepatocytes. They also have the added advantage of low immunogenicity. A retroviral vector may also be, e.g., a gammaretroviral vector. A gammaretroviral vector may include, e.g., a promoter, a packaging signal (y), a primer binding site (PBS), 5 one or more (e.g., two) long terminal repeats (LTR), and a transgene of interest, e.g., a gene encoding a CAR. A gammaretroviral vector may lack viral structural gens such as gag, pol, and env. Exemplary gammaretroviral vectors include Murine Leukemia Virus (MLV), Spleen-Focus Forming Virus (SFFV), and Myeloproliferative Sarcoma Virus (MPSV), and vectors derived therefrom. Other gammaretroviral vectors are described, e.g., in Tobias Maetzig et al.,“Gammaretroviral Vectors: Biology, Technology and 10 Application” Viruses.2011 Jun; 3(6): 677–713.

In another embodiment, the vector comprising the nucleic acid encoding the desired CAR of the disclosure is an adenoviral vector (A5/35). In another embodiment, the expression of nucleic acids encoding CARs can be accomplished using of transposons such as sleeping beauty, crisper, CAS9, and zinc finger nucleases. See below June et al.2009Nature Reviews Immunology 9.10: 704-716, is incorporated herein by 15 reference.

The nucleic acid can be cloned into a number of types of vectors. For example, the nucleic acid can be cloned into a vector including, but not limited to a plasmid, a phagemid, a phage derivative, an animal virus, and a cosmid. Vectors of particular interest include expression vectors, replication vectors, probe generation vectors, and sequencing vectors.

20 Disclosed herein are methods for producing an in vitro transcribed RNA CAR. The present disclosure also includes a CAR encoding RNA construct that can be directly transfected into a cell. A method for generating mRNA for use in transfection can involve in vitro transcription (IVT) of a template with specially designed primers, followed by polyA addition, to produce a construct containing 3' and 5' untranslated sequence (“UTR”), a 5' cap and/or Internal Ribosome Entry Site (IRES), the nucleic acid to be 25 expressed, and a polyA tail, typically 50-2000 bases in length (SEQ ID NO: 269). RNA so produced can efficiently transfect different kinds of cells. In one aspect, the template includes sequences for the CAR. Non-viral delivery methods

In some aspects, non-viral methods can be used to deliver a nucleic acid encoding a CAR described herein into a cell or tissue or a subject.

30 In some embodiments, the non-viral method includes the use of a transposon (also called a transposable element). In some embodiments, a transposon is a piece of DNA that can insert itself at a location in a genome, for example, a piece of DNA that is capable of self-replicating and inserting its copy into a genome, or a piece of DNA that can be spliced out of a longer nucleic acid and inserted into another place in a genome. For example, a transposon comprises a DNA sequence made up of inverted repeats 35 flanking genes for transposition.

In some embodiments, cells, e.g., T or NK cells, are generated that express a CAR described herein by using a combination of gene insertion using the SBTS and genetic editing using a nuclease (e.g., Zinc finger nucleases (ZFNs), Transcription Activator-Like Effector Nucleases (TALENs), the CRISPR/Cas system, or engineered meganuclease re-engineered homing endonucleases).

In some embodiments, cells of the disclosure, e.g., T or NK cells, e.g., allogeneic T cells, e.g., described herein, (e.g., that express a CAR described herein) are generated by contacting the cells with (a) 5 a composition comprising one or more gRNA molecules, e.g., as described herein, and one or more Cas molecules, e.g., a Cas9 molecule, e.g., as described herein, and (b) nucleic acid comprising sequence encoding a CAR, e.g., described herein (such as a template nucleic acid molecule as described herein). Without being bound by theory, said composition of (a), above, will induce a break at or near the genomic DNA targeted by the targeting domain of the gRNA molecule(s), and the nucleic acid of (b) will incorporate, 10 e.g., partially or wholly, into the genome at or near said break, such that upon integration, the encoded CAR molecule is expressed. In embodiments, expression of the CAR will be controlled by promoters or other regulatory elements endogenous to the genome (e.g., the promoter controlling expression from the gene in which the nucleic acid of (b) was inserted). In other embodiments, the nucleic acid of (b) further comprises a promoter and/or other regulatory elements, e.g., as described herein, e.g., an EF1-alpha promoter, 15 operably linked to the sequence encoding the CAR, such that upon integration, expression of the CAR is controlled by that promoter and/or other regulatory elements. Additional features of the disclosure relating to use of CRISPR/Cas9 systems, e.g., as described herein, to direct incorporation of nucleic acid sequence encoding a CAR, e.g., as described herein, are described elsewhere in this application, e.g., in the section relating to gene insertion and homologous recombination. In embodiments, the composition of a) above is 20 a composition comprising RNPs comprising the one or more gRNA molecules. In embodiments, RNPs comprising gRNAs targeting unique target sequences are introduced into the cell simultaneously, e.g., as a mixture of RNPs comprising the one or more gRNAs. In embodiments, RNPs comprising gRNAs targeting unique target sequences are introduced into the cell sequentially.

In some embodiments, use of a non-viral method of delivery permits reprogramming of cells, e.g., 25 T or NK cells, and direct infusion of the cells into a subject. Advantages of non-viral vectors include but are not limited to the ease and relatively low cost of producing sufficient amounts required to meet a patient population, stability during storage, and lack of immunogenicity.

Promoters

In one embodiment, the vector further comprises a promoter. In some embodiments, the promoter 30 is chosen from an EF-1 promoter, a CMV IE gene promoter, an EF-1a promoter, an ubiquitin C promoter, or a phosphoglycerate kinase (PGK) promoter. In one embodiment, the promoter is an EF-1 promoter. In one embodiment, the EF-1 promoter comprises the sequence of SEQ ID NO: 270.

Host cells for CAR expression

As noted above, in some aspects the disclosure pertains to a cell, e.g., an immune effector cell, (e.g., 35 a population of cells, e.g., a population of immune effector cells) comprising a nucleic acid molecule, a CAR polypeptide molecule, or a vector as described herein. In certain aspects of the present disclosure, immune effector cells, e.g., T cells, can be obtained from a unit of blood collected from a subject using any number of techniques known to the skilled artisan, such as Ficoll™ separation. In one preferred aspect, cells from the circulating blood of an individual are obtained by apheresis. The apheresis product typically contains lymphocytes, including T cells, monocytes, 5 granulocytes, B cells, other nucleated white blood cells, red blood cells, and platelets. In one aspect, the cells collected by apheresis may be washed to remove the plasma fraction and, optionally, to place the cells in an appropriate buffer or media for subsequent processing steps. In one embodiment, the cells are washed with phosphate buffered saline (PBS). In an alternative embodiment, the wash solution lacks calcium and may lack magnesium or may lack many if not all divalent cations.

10 Initial activation steps in the absence of calcium can lead to magnified activation. As those of ordinary skill in the art would readily appreciate a washing step may be accomplished by methods known to those in the art, such as by using a semi-automated“flow-through” centrifuge (for example, the Cobe 2991 cell processor, the Baxter CytoMate, or the Haemonetics Cell Saver 5) according to the manufacturer’s instructions. After washing, the cells may be resuspended in a variety of biocompatible buffers, such as, for 15 example, Ca-free, Mg-free PBS, PlasmaLyte A, or other saline solution with or without buffer.

Alternatively, the undesirable components of the apheresis sample may be removed and the cells directly resuspended in culture media.

It is recognized that the methods of the application can utilize culture media conditions comprising 5% or less, for example 2%, human AB serum, and employ known culture media conditions and 20 compositions, for example those described in Smith et al.,“Ex vivo expansion of human T cells for adoptive immunotherapy using the novel Xeno-free CTS Immune Cell Serum Replacement” Clinical & Translational Immunology (2015) 4, e31; doi:10.1038/cti.2014.31.

In one aspect, T cells are isolated from peripheral blood lymphocytes by lysing the red blood cells and depleting the monocytes, for example, by centrifugation through a PERCOLL ^TM gradient or by 25 counterflow centrifugal elutriation.

The methods described herein can include, e.g., selection of a specific subpopulation of immune effector cells, e.g., T cells, that are a T regulatory cell-depleted population, CD25+ depleted cells, using, e.g., a negative selection technique, e.g., described herein. Preferably, the population of T regulatory depleted cells contains less than 30%, 25%, 20%, 15%, 10%, 5%, 4%, 3%, 2%, 1% of CD25+ cells. 30 In one embodiment, T regulatory cells, e.g., CD25+ T cells, are removed from the population using an anti-CD25 antibody, or fragment thereof, or a CD25-binding ligand, IL-2. In one embodiment, the anti- CD25 antibody, or fragment thereof, or CD25-binding ligand is conjugated to a substrate, e.g., a bead, or is otherwise coated on a substrate, e.g., a bead. In one embodiment, the anti-CD25 antibody, or fragment thereof, is conjugated to a substrate as described herein.

35 In one embodiment, the T regulatory cells, e.g., CD25+ T cells, are removed from the population using CD25 depletion reagent from Miltenyi ^TM . In one embodiment, the ratio of cells to CD25 depletion reagent is 1e7 cells to 20 uL, or 1e7 cells to 15 uL, or 1e7 cells to 10 uL, or 1e7 cells to 5 uL, or 1e7 cells to 2.5 uL, or 1e7 cells to 1.25 uL. In one embodiment, e.g., for T regulatory cells, e.g., CD25+ depletion, greater than 500 million cells/ml is used. In a further aspect, a concentration of cells of 600, 700, 800, or 900 million cells/ml is used.

In one embodiment, the population of immune effector cells to be depleted includes about 6 x 10 ⁹ 5 CD25+ T cells. In other aspects, the population of immune effector cells to be depleted include about 1 x 10 ⁹ to 1x 10 ¹⁰ CD25+ T cell, and any integer value in between. In one embodiment, the resulting population T regulatory depleted cells has 2 x 10 ⁹ T regulatory cells, e.g., CD25+ cells, or less (e.g., 1 x 10 ⁹ , 5 x 10 ⁸ , 1 x 10 ⁸ , 5 x 10 ⁷ , 1 x 10 ⁷ , or less CD25+ cells).

In one embodiment, the T regulatory cells, e.g., CD25+ cells, are removed from the population 10 using the CliniMAC system with a depletion tubing set, such as, e.g., tubing 162-01. In one embodiment, the CliniMAC system is run on a depletion setting such as, e.g., DEPLETION2.1.

Without wishing to be bound by a particular theory, decreasing the level of negative regulators of immune cells (e.g., decreasing the number of unwanted immune cells, e.g., T _REG cells), in a subject prior to apheresis or during manufacturing of a CAR-expressing cell product can reduce the risk of subject relapse. 15 For example, methods of depleting T _REG cells are known in the art. Methods of decreasing T _REG cells include, but are not limited to, cyclophosphamide, anti-GITR antibody (an anti-GITR antibody described herein), CD25-depletion, and combinations thereof.

In some embodiments, the manufacturing methods comprise reducing the number of (e.g., depleting) T _REG cells prior to manufacturing of the CAR-expressing cell. For example, manufacturing 20 methods comprise contacting the sample, e.g., the apheresis sample, with an anti-GITR antibody and/or an anti-CD25 antibody (or fragment thereof, or a CD25-binding ligand), e.g., to deplete T _REG cells prior to manufacturing of the CAR-expressing cell (e.g., T cell, NK cell) product.

In an embodiment, a subject is pre-treated with one or more therapies that reduce T _REG cells prior to collection of cells for CAR-expressing cell product manufacturing, thereby reducing the risk of subject 25 relapse to CAR-expressing cell treatment. In an embodiment, methods of decreasing T _REG cells include, but are not limited to, administration to the subject of one or more of cyclophosphamide, anti-GITR antibody, CD25-depletion, or a combination thereof. Administration of one or more of cyclophosphamide, anti-GITR antibody, CD25-depletion, or a combination thereof, can occur before, during or after an infusion of the CAR-expressing cell product.

30 In an embodiment, a subject is pre-treated with cyclophosphamide prior to collection of cells for CAR-expressing cell product manufacturing, thereby reducing the risk of subject relapse to CAR- expressing cell treatment. In an embodiment, a subject is pre-treated with an anti-GITR antibody prior to collection of cells for CAR-expressing cell product manufacturing, thereby reducing the risk of subject relapse to CAR-expressing cell treatment.

35 In one embodiment, the population of cells to be removed are neither the regulatory T cells or tumor cells, but cells that otherwise negatively affect the expansion and/or function of CART cells, e.g. cells expressing CD14, CD11b, CD33, CD15, or other markers expressed by potentially immune suppressive cells. In one embodiment, such cells are envisioned to be removed concurrently with regulatory T cells and/or tumor cells, or following said depletion, or in another order.

The methods described herein can include more than one selection step, e.g., more than one depletion step. Enrichment of a T cell population by negative selection can be accomplished, e.g., with a 5 combination of antibodies directed to surface markers unique to the negatively selected cells. One method is cell sorting and/or selection via negative magnetic immunoadherence or flow cytometry that uses a cocktail of monoclonal antibodies directed to cell surface markers present on the cells negatively selected. For example, to enrich for CD4+ cells by negative selection, a monoclonal antibody cocktail can include antibodies to CD14, CD20, CD11b, CD16, HLA-DR, and CD8.

10 The methods described herein can further include removing cells from the population which express a tumor antigen, e.g., a tumor antigen that does not comprise CD25, e.g., CD19, CD30, CD38, CD123, CD20, CD14 or CD11b, to thereby provide a population of T regulatory depleted, e.g., CD25+ depleted, and tumor antigen depleted cells that are suitable for expression of a CAR, e.g., a CAR described herein. In one embodiment, tumor antigen expressing cells are removed simultaneously with the T 15 regulatory, e.g., CD25+ cells. For example, an anti-CD25 antibody, or fragment thereof, and an anti-tumor antigen antibody, or fragment thereof, can be attached to the same substrate, e.g., bead, which can be used to remove the cells or an anti-CD25 antibody, or fragment thereof, or the anti-tumor antigen antibody, or fragment thereof, can be attached to separate beads, a mixture of which can be used to remove the cells. In other embodiments, the removal of T regulatory cells, e.g., CD25+ cells, and the removal of the tumor 20 antigen expressing cells is sequential, and can occur, e.g., in either order.

Also provided are methods that include removing cells from the population which express a check point inhibitor, e.g., a check point inhibitor described herein, e.g., one or more of PD1+ cells, LAG3+ cells, and TIM3+ cells, to thereby provide a population of T regulatory depleted, e.g., CD25+ depleted cells, and check point inhibitor depleted cells, e.g., PD1+, LAG3+ and/or TIM3+ depleted cells. Exemplary check 25 point inhibitors include B7-H1, B7-1, CD160, P1H, 2B4, PD1, TIM3, CEACAM (e.g., CEACAM-1, CEACAM-3 and/or CEACAM-5), LAG3, TIGIT, CTLA-4, BTLA and LAIR1. In one embodiment, check point inhibitor expressing cells are removed simultaneously with the T regulatory, e.g., CD25+ cells. For example, an anti-CD25 antibody, or fragment thereof, and an anti-check point inhibitor antibody, or fragment thereof, can be attached to the same bead which can be used to remove the cells, or an anti-CD25 30 antibody, or fragment thereof, and the anti-check point inhibitor antibody, or fragment there, can be attached to separate beads, a mixture of which can be used to remove the cells. In other embodiments, the removal of T regulatory cells, e.g., CD25+ cells, and the removal of the check point inhibitor expressing cells is sequential, and can occur, e.g., in either order.

Methods described herein can include a positive selection step. For example, T cells can isolated 35 by incubation with anti-CD3/anti-CD28 (e.g., 3x28)-conjugated beads, such as DYNABEADS® M-450 CD3/CD28 T, for a time period sufficient for positive selection of the desired T cells. In one embodiment, the time period is about 30 minutes. In a further embodiment, the time period ranges from 30 minutes to 36 hours or longer and all integer values there between. In a further embodiment, the time period is at least 1, 2, 3, 4, 5, or 6 hours. In yet another embodiment, the time period is 10 to 24 hours, e.g., 24 hours. Longer incubation times may be used to isolate T cells in any situation where there are few T cells as compared to other cell types, such in isolating tumor infiltrating lymphocytes (TIL) from tumor tissue or from 5 immunocompromised individuals. Further, use of longer incubation times can increase the efficiency of capture of CD8+ T cells. Thus, by simply shortening or lengthening the time T cells are allowed to bind to the CD3/CD28 beads and/or by increasing or decreasing the ratio of beads to T cells (as described further herein), subpopulations of T cells can be preferentially selected for or against at culture initiation or at other time points during the process. Additionally, by increasing or decreasing the ratio of anti-CD3 and/or anti- 10 CD28 antibodies on the beads or other surface, subpopulations of T cells can be preferentially selected for or against at culture initiation or at other desired time points.

In one embodiment, a T cell population can be selected that expresses one or more of IFN-^, TNFa, IL-17A, IL-2, IL-3, IL-4, GM-CSF, IL-10, IL-13, granzyme B, and perforin, or other appropriate molecules, e.g., other cytokines. Methods for screening for cell expression can be determined, e.g., by the methods 15 described in PCT Publication No.: WO 2013/126712.

For isolation of a desired population of cells by positive or negative selection, the concentration of cells and surface (e.g., particles such as beads) can be varied. In certain aspects, it may be desirable to significantly decrease the volume in which beads and cells are mixed together (e.g., increase the concentration of cells), to ensure maximum contact of cells and beads. For example, in one aspect, a 20 concentration of 10 billion cells/ml, 9 billion/ml, 8 billion/ml, 7 billion/ml, 6 billion/ml, or 5 billion/ml is used. In one aspect, a concentration of 1 billion cells/ml is used. In yet one aspect, a concentration of cells from 75, 80, 85, 90, 95, or 100 million cells/ml is used. In further aspects, concentrations of 125 or 150 million cells/ml can be used.

Using high concentrations can result in increased cell yield, cell activation, and cell expansion. 25 Further, use of high cell concentrations allows more efficient capture of cells that may weakly express target antigens of interest, such as CD28-negative T cells, or from samples where there are many tumor cells present (e.g., leukemic blood, tumor tissue, etc.). Such populations of cells may have therapeutic value and would be desirable to obtain. For example, using high concentration of cells allows more efficient selection of CD8+ T cells that normally have weaker CD28 expression.

30 In a related aspect, it may be desirable to use lower concentrations of cells. By significantly diluting the mixture of T cells and surface (e.g., particles such as beads), interactions between the particles and cells is minimized. This selects for cells that express high amounts of desired antigens to be bound to the particles. For example, CD4+ T cells express higher levels of CD28 and are more efficiently captured than CD8+ T cells in dilute concentrations. In one aspect, the concentration of cells used is 5 x 10 ⁶ /ml. In other aspects, 35 the concentration used can be from about 1 x 10 ⁵ /ml to 1 x 10 ⁶ /ml, and any integer value in between.

In other aspects, the cells may be incubated on a rotator for varying lengths of time at varying speeds at either 2-10 ^o C or at room temperature. T cells for stimulation can also be frozen after a washing step. Wishing not to be bound by theory, the freeze and subsequent thaw step provides a more uniform product by removing granulocytes and to some extent monocytes in the cell population. After the washing step that removes plasma and platelets, the cells may be suspended in a freezing solution. While many freezing solutions and parameters are known 5 in the art and will be useful in this context, one method involves using PBS containing 20% DMSO and 8% human serum albumin, or culture media containing 10% Dextran 40 and 5% Dextrose, 20% Human Serum Albumin and 7.5% DMSO, or 31.25% Plasmalyte-A, 31.25% Dextrose 5%, 0.45% NaCl, 10% Dextran 40 and 5% Dextrose, 20% Human Serum Albumin, and 7.5% DMSO or other suitable cell freezing media containing for example, Hespan and PlasmaLyte A, the cells then are frozen to -80°C at a rate of 1° per 10 minute and stored in the vapor phase of a liquid nitrogen storage tank. Other methods of controlled freezing may be used as well as uncontrolled freezing immediately at -20° C or in liquid nitrogen.

In certain aspects, cryopreserved cells are thawed and washed as described herein and allowed to rest for one hour at room temperature prior to activation using the methods of the present disclosure.

Also contemplated in the context of the disclosure is the collection of blood samples or apheresis 15 product from a subject at a time period prior to when the expanded cells as described herein might be needed.

As such, the source of the cells to be expanded can be collected at any time point necessary, and desired cells, such as T cells, isolated and frozen for later use in immune effector cell therapy for any number of diseases or conditions that would benefit from immune effector cell therapy, such as those described herein. In one aspect, a blood sample or an apheresis is taken from a generally healthy subject. In certain aspects, 20 a blood sample or an apheresis is taken from a generally healthy subject who is at risk of developing a disease, but who has not yet developed a disease, and the cells of interest are isolated and frozen for later use. In certain aspects, the T cells may be expanded, frozen, and used at a later time. In certain aspects, samples are collected from a patient shortly after diagnosis of a particular disease as described herein but prior to any treatments. In a further aspect, the cells are isolated from a blood sample or an apheresis from 25 a subject prior to any number of relevant treatment modalities, including but not limited to treatment with agents such as natalizumab, efalizumab, antiviral agents, chemotherapy, radiation, immunosuppressive agents, such as cyclosporin, azathioprine, methotrexate, mycophenolate, and FK506, antibodies, or other immunoablative agents such as CAMPATH, anti-CD3 antibodies, cytoxan, fludarabine, cyclosporin, FK506, rapamycin, mycophenolic acid, steroids, FR901228, and irradiation.

30 In a further aspect of the present disclosure, T cells are obtained from a patient directly following treatment that leaves the subject with functional T cells. In this regard, it has been observed that following certain cancer treatments, in particular treatments with drugs that damage the immune system, shortly after treatment during the period when patients would normally be recovering from the treatment, the quality of T cells obtained may be optimal or improved for their ability to expand ex vivo. Likewise, following ex 35 vivo manipulation using the methods described herein, these cells may be in a preferred state for enhanced engraftment and in vivo expansion. Thus, it is contemplated within the context of the present disclosure to collect blood cells, including T cells, dendritic cells, or other cells of the hematopoietic lineage, during this recovery phase. Further, in certain aspects, mobilization (for example, mobilization with GM-CSF) and conditioning regimens can be used to create a condition in a subject wherein repopulation, recirculation, regeneration, and/or expansion of particular cell types is favored, especially during a defined window of time following therapy. Illustrative cell types include T cells, B cells, dendritic cells, and other cells of the 5 immune system.

In one embodiment, the immune effector cells expressing a CAR molecule, e.g., a CAR molecule described herein, are obtained from a subject that has received a low, immune enhancing dose of an mTOR inhibitor. In an embodiment, the population of immune effector cells, e.g., T cells, to be engineered to express a CAR, are harvested after a sufficient time, or after sufficient dosing of the low, immune enhancing, 10 dose of an mTOR inhibitor, such that the level of PD1 negative immune effector cells, e.g., T cells, or the ratio of PD1 negative immune effector cells, e.g., T cells/ PD1 positive immune effector cells, e.g., T cells, in the subject or harvested from the subject has been, at least transiently, increased.

In other embodiments, population of immune effector cells, e.g., T cells, which have, or will be engineered to express a CAR, can be treated ex vivo by contact with an amount of an mTOR inhibitor that 15 increases the number of PD1 negative immune effector cells, e.g., T cells or increases the ratio of PD1 negative immune effector cells, e.g., T cells/ PD1 positive immune effector cells, e.g., T cells.

In one embodiment, a T cell population is diaglycerol kinase (DGK)-deficient. DGK-deficient cells include cells that do not express DGK RNA or protein, or have reduced or inhibited DGK activity. DGK- deficient cells can be generated by genetic approaches, e.g., administering RNA-interfering agents, e.g., 20 siRNA, shRNA, miRNA, to reduce or prevent DGK expression. Alternatively, DGK-deficient cells can be generated by treatment with DGK inhibitors described herein.

In one embodiment, a T cell population is Ikaros-deficient. Ikaros-deficient cells include cells that do not express Ikaros RNA or protein, or have reduced or inhibited Ikaros activity, Ikaros-deficient cells can be generated by genetic approaches, e.g., administering RNA-interfering agents, e.g., siRNA, shRNA, 25 miRNA, to reduce or prevent Ikaros expression. Alternatively, Ikaros-deficient cells can be generated by treatment with Ikaros inhibitors, e.g., lenalidomide.

In embodiments, a T cell population is DGK-deficient and Ikaros-deficient, e.g., does not express DGK and Ikaros, or has reduced or inhibited DGK and Ikaros activity. Such DGK and Ikaros-deficient cells can be generated by any of the methods described herein.

30 In an embodiment, the NK cells are obtained from the subject. In another embodiment, the NK cells are an NK cell line, e.g., NK-92 cell line (Conkwest).

In some aspects, the cells of the disclosure (e.g., the immune effector cells of the disclosure, e.g., the CAR-expressing cells of the disclosure) are induced pluripotent stem cells (“iPSCs”) or embryonic stem cells (ESCs), or are T cells generated from (e.g., differentiated from) said iPSC and/or ESC. iPSCs can be 35 generated, for example, by methods known in the art, from peripheral blood T lymphocytes, e.g., peripheral blood T lymphocytes isolated from a healthy volunteer. As well, such cells may be differentiated into T cells by methods known in the art. See e.g., Themeli M. et al., Nat. Biotechnol., 31, pp.928-933 (2013); doi:10.1038/nbt.2678; WO2014/165707, the contents of each of which are incorporated herein by reference in their entirety.

In another embodiment, the compounds of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, of the present disclosure are used in 5 combination with one or more of the therapeutic agents listed in Table 13 or listed in the patent and patent applications cited in Table 13, to treat cancer. Each publication listed in Table 13 is herein incorporated by reference in its entirety, including all structural formulae therein.

Table 13.

Estrogen Receptor Antagonists

In some embodiments, an estrogen receptor (ER) antagonist is used in combination with the compounds of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for treating a disease, e.g., cancer. In some embodiments, the estrogen receptor 5 antagonist is a selective estrogen receptor degrader (SERD). SERDs are estrogen receptor antagonists which bind to the receptor and result in e.g., degradation or down-regulation of the receptor (Boer K. et al., (2017) Therapeutic Advances in Medical Oncology 9(7): 465-479). ER is a hormone-activated transcription factor important for e.g., the growth, development and physiology of the human reproductive system. ER is activated by, e.g., the hormone estrogen (17beta estradiol). ER expression and signaling is implicated in 10 cancers (e.g., breast cancer), e.g., ER positive (ER+) breast cancer. In some embodiments, the SERD is chosen from LSZ102, fulvestrant, brilanestrant, or elacestrant.

Exemplary Estrogen Receptor Antagonists

In some embodiments, the SERD comprises a compound disclosed in International Application Publication No. WO 2014/130310, which is hereby incorporated by reference in its entirety. In some embodiments, the SERD comprises LSZ102. LSZ102 has the chemical name: (E)-3-(4-((2-(2-(1,1- difluoroethyl)-4-fluorophenyl)-6-hydroxybenzo[b]thiophen-3-y l)oxy)phenyl)acrylic acid.

Other Exemplary Estrogen Receptor Antagonists

In some embodiments, the SERD comprises fulvestrant (CAS Registry Number: 129453-61-8), or 5 a compound disclosed in International Application Publication No. WO 2001/051056, which is hereby incorporated by reference in its entirety. Fulvestrant is also known as ICI 182780, ZM 182780, FASLODEX®, or (7a,17b)-7-{9-[(4,4,5,5,5-pentafluoropentyl)sulfinyl]nonyl}e stra-1,3,5(10)-triene-3,17- diol. Fulvestrant is a high affinity estrogen receptor antagonist with an IC50 of 0.29 nM.

In some embodiments, the SERD comprises elacestrant (CAS Registry Number: 722533-56-4), or 10 a compound disclosed in U.S. Patent No. 7,612,114, which is incorporated by reference in its entirety.

Elacestrant is also known as RAD1901, ER-306323 or (6R)-6-{2-[Ethyl({4-[2- (ethylamino)ethyl]phenyl}methyl)amino]-4-methoxyphenyl}-5,6, 7,8-tetrahydronaphthalen-2-ol.

Elacestrant is an orally bioavailable, non-steroidal combined selective estrogens receptor modulator (SERM) and a SERD. Elacestrant is also disclosed, e.g., in Garner F et al., (2015) Anticancer Drugs 26(9):948-56. 15 In some embodiments, the SERD is brilanestrant (CAS Registry Number: 1365888-06-7), or a compound disclosed in International Application Publication No. WO 2015/136017, which is incorporated by reference in its entirety. Brilanestrant is also known as GDC-0810, ARN810, RG-6046, RO-7056118 or (2E)-3-{4-[(1E)-2-(2-chloro-4-fluorophenyl)-1-(1H-indazol-5- yl)but-1-en-1-yl]phenyl}prop-2-enoic acid. Brilanestrant is a next-generation, orally bioavailable selective SERD with an IC50 of 0.7 nM. Brilanestrant 20 is also disclosed, e.g., in Lai A. et al. (2015) Journal of Medicinal Chemistry 58 (12): 4888–4904.

In some embodiments, the SERD is chosen from RU 58668, GW7604, AZD9496, bazedoxifene, pipendoxifene, arzoxifene, OP-1074, or acolbifene, e.g., as disclosed in McDonell et al. (2015) Journal of Medicinal Chemistry 58(12) 4883-4887. Other exemplary estrogen receptor antagonists are disclosed, e.g., in WO 2011/156518, WO 2011/159769, WO 2012/037410, WO 2012/037411, and US 2012/0071535, all 25 of which are hereby incorporated by reference in their entirety.

CDK4/6 Inhibitors

In some embodiments, an inhibitor of Cyclin-Dependent Kinases 4 or 6 (CDK4/6) is used in combination with the compounds of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for treating a disease, e.g., cancer. In some embodiments, the 30 CDK4/6 inhibitor is chosen from ribociclib, abemaciclib (Eli Lilly), or palbociclib.

Exemplary CDK4/6 Inhibitors

In some embodiments, the CDK4/6 inhibitor comprises ribociclib (CAS Registry Number: 1211441-98-3), or a compound disclosed in U.S. Patent Nos. 8,415,355 and 8,685,980, which are incorporated by reference in their entirety.

35 In some embodiments, the CDK4/6 inhibitor comprises a compound disclosed in International Application Publication No. WO 2010/020675 and U.S. Patent Nos.8,415,355 and 8,685,980, which are incorporated by reference in their entirety. In some embodiments, the CDK4/6 inhibitor comprises ribociclib (CAS Registry Number: 1211441-98-3). Ribociclib is also known as LEE011, KISQALI®, or 7-cyclopentyl-N,N-dimethyl-2-((5- (piperazin-1-yl)pyridin-2-yl)amino)-7H-pyrrolo[2,3-d]pyrimid ine-6-carboxamide.

Other Exemplary CDK4/6 Inhibitors

5 In some embodiments, the CDK4/6 inhibitor comprises abemaciclib (CAS Registry Number:

1231929-97-7). Abemaciclib is also known as LY835219 or N-[5-[(4-Ethyl-1-piperazinyl)methyl]-2- pyridinyl]-5-fluoro-4-[4-fluoro-2-methyl-1-(1-methylethyl)-1 H-benzimidazol-6-yl]-2-pyrimidinamine. Abemaciclib is a CDK inhibitor selective for CDK4 and CDK6 and is disclosed, e.g., in Torres-Guzman R et al. (2017) Oncotarget 10.18632/oncotarget.17778.

10 In some embodiments, the CDK4/6 inhibitor comprises palbociclib (CAS Registry Number:

571190-30-2). Palbociclib is also known as PD-0332991, IBRANCE® or 6-Acetyl-8-cyclopentyl-5- methyl-2-{[5-(1-piperazinyl)-2-pyridinyl]amino}pyrido[2,3-d] pyrimidin-7(8H)-one. Palbociclib inhibits CDK4 with an IC50 of 11nM, and inhibits CDK6 with an IC50 of 16nM, and is disclosed, e.g., in Finn et al. (2009) Breast Cancer Research 11(5):R77.

15 CXCR2 Inhibitors

In some embodiments, an inhibitor of chemokine (C-X-C motif) receptor 2 (CXCR ₂ ) is used in combination with the compounds of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for treating a disease, e.g., cancer. In some embodiments, the CXCR ₂ inhibitor is chosen from 6-chloro-3-((3,4-dioxo-2-(pentan-3-ylamino)cyclobut-1-en-1-y l)amino)- 20 2-hydroxy-N-methoxy-N-methylbenzenesulfonamide, danirixin, reparixin, or navarixin.

Exemplary CXCR2 inhibitors

In some embodiments, the CXCR ₂ inhibitor comprises a compound disclosed in U.S. Patent Nos. 7989497, 8288588, 8329754, 8722925, 9115087, U.S. Application Publication Nos. US 2010/0152205, US 2011/0251205 and US 2011/0251206, and International Application Publication Nos. WO 2008/061740, 25 WO 2008/061741, WO 2008/062026, WO 2009/106539, WO2010/063802, WO 2012/062713, WO 2013/168108, WO 2010/015613 and WO 2013/030803. In some embodiments, the CXCR ₂ inhibitor comprises 6-chloro-3-((3,4-dioxo-2-(pentan-3-ylamino)cyclobut-1-en-1-y l)amino)-2-hydroxy-N- methoxy-N-methylbenzenesulfonamide or a choline salt thereof. In some embodiments, the CXCR ₂ inhibitor comprises 6-chloro-3-((3,4-dioxo-2-(pentan-3-ylamino)cyclobut-1-en-1-y l)amino)-2-hydroxy-N-30 methoxy-N-methylbenzenesulfonamide choline salt. In some embodiments, the CXCR ₂ inhibitor is 2- Hydroxy-N,N,N-trimethylethan-1-aminium 3-chloro-6-({3,4-dioxo-2-[(pentan-3-yl)amino]cyclobut-1-en- 1-yl}amino)-2-(N-methoxy-N-methylsulfamoyl)phenolate (i.e., 6-chloro-3-((3,4-dioxo-2-(pentan-3- ylamino)cyclobut-1-en-1-yl)amino)-2-hydroxy-N-methoxy-N-meth ylbenzenesulfonamide choline salt) and has the following chemical structure:

Other Exemplary CXCR2 Inhibitors

In some embodiments, the CXCR ₂ inhibitor comprises danirixin (CAS Registry Number: 954126- 98-8). Danirixin is also known as GSK1325756 or 1-(4-chloro-2-hydroxy-3-piperidin-3-ylsulfonylphenyl)- 5 3-(3-fluoro-2-methylphenyl)urea. Danirixin is disclosed, e.g., in Miller et al. Eur J Drug Metab Pharmacokinet (2014) 39:173–181; and Miller et al. BMC Pharmacology and Toxicology (2015), 16:18.

In some embodiments, the CXCR ₂ inhibitor comprises reparixin (CAS Registry Number: 266359- 83-5). Reparixin is also known as repertaxin or (2R)-2-[4-(2-methylpropyl)phenyl]-N- methylsulfonylpropanamide. Reparixin is a non-competitive allosteric inhibitor of CXCR1/2. Reparixin is 10 disclosed, e.g., in Zarbock et al. Br J Pharmacol.2008; 155(3):357-64.

In some embodiments, the CXCR ₂ inhibitor comprises navarixin. Navarixin is also known as MK- 7123, SCH 527123, PS291822, or 2-hydroxy-N,N-dimethyl-3-[[2-[[(1R)-1-(5-methylfuran-2- yl)propyl]amino]-3,4-dioxocyclobuten-1-yl]amino]benzamide. Navarixin is disclosed, e.g., in Ning et al. Mol Cancer Ther.2012; 11(6):1353-64.

15 CSF-1/1R Binding Agents

In some embodiments, a CSF-1/1R binding agent is used in combination with the compounds of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for treating a disease, e.g., cancer. In some embodiments, the CSF-1/1R binding agent is chosen from an inhibitor of macrophage colony-stimulating factor (M-CSF), e.g., a monoclonal antibody or Fab to20 M-CSF (e.g., MCS110), a CSF-1R tyrosine kinase inhibitor (e.g., 4-((2-(((1R,2R)-2- hydroxycyclohexyl)amino)benzo[d]thiazol-6-yl)oxy)-N-methylpi colinamide or BLZ945), a receptor tyrosine kinase inhibitor (RTK) (e.g., pexidartinib), or an antibody targeting CSF-1R (e.g., emactuzumab or FPA008). In some embodiments, the CSF-1/1R inhibitor is BLZ945. In some embodiments, the CSF- 1/1R binding agent is MCS110. In other embodiments, the CSF-1/1R binding agent is pexidartinib. 25 Exemplary CSF-1 binding agents

In some embodiments, the CSF-1/1R binding agent comprises an inhibitor of macrophage colony- stimulating factor (M-CSF). M-CSF is also sometimes known as CSF-1. In certain embodiments, the CSF- 1/1R binding agent is an antibody to CSF-1 (e.g., MCS110). In other embodiments, the CSF-1/1R binding agent is an inhibitor of CSF-1R (e.g., BLZ945). In some embodiments, the CSF-1/1R binding agent comprises a monoclonal antibody or Fab to M- CSF (e.g., MCS110/H-RX1), or a binding agent to CSF-1 disclosed in International Application Publication Nos. WO 2004/045532 and WO 2005/068503, including H-RX1 or 5H4 (e.g., an antibody molecule or Fab fragment against M-CSF) and US9079956, which applications and patent are incorporated by reference in 5 their entirety.

Table 13a. Amino acid and nucleotide sequences of an exemplary anti-M-CSF antibody molecule (MCS110)

In another embodiment, the CSF-1/1R binding agent comprises a CSF-1R tyrosine kinase inhibitor, 4-((2-(((1R,2R)-2-hydroxycyclohexyl)amino)benzo[d]thiazol-6- yl)oxy)-N-methylpicolinamide (BLZ945), or a compound disclosed in International Application Publication No. WO 2007/121484, and U.S. Patent Nos.7,553,854, 8,173,689, and 8,710,048, which are incorporated by reference in their entirety.

5 Other Exemplary CSF-1/1R Binding Agents

In some embodiments, the CSF-1/1R binding agent comprises pexidartinib (CAS Registry Number 1029044-16-3). Pexidrtinib is also known as PLX3397 or 5-((5-chloro-1H-pyrrolo[2,3-b]pyridin-3- yl)methyl)-N-((6-(trifluoromethyl)pyridin-3-yl)methyl)pyridi n-2-amine. Pexidartinib is a small-molecule receptor tyrosine kinase (RTK) inhibitor of KIT, CSF1R and FLT3. FLT3, CSF1R and FLT3 are 10 overexpressed or mutated in many cancer cell types and play major roles in tumor cell proliferation and metastasis. PLX3397 can bind to and inhibit phosphorylation of stem cell factor receptor (KIT), colony- stimulating factor-1 receptor (CSF1R) and FMS-like tyrosine kinase 3 (FLT3), which may result in the inhibition of tumor cell proliferation and down-modulation of macrophages, osteoclasts and mast cells involved in the osteolytic metastatic disease.

15 In some embodiments, the CSF-1/1R binding agent is emactuzumab. Emactuzumab is also known as RG7155 or RO5509554. Emactuzumab is a humanized IgG1 mAb targeting CSF1R. In some embodiments, the CSF-1/1R binding agent is FPA008. FPA008 is a humanized mAb that inhibits CSF1R. A2aR antagonists

In some embodiments, an adenosine A2a receptor (A2aR) antagonist (e.g., an inhibitor of A2aR 20 pathway, e.g., an adenosine inhibitor, e.g., an inhibitor of A2aR or CD-73) is used in combination with the compounds of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for treating a disease, e.g., cancer. In some embodiments, the A2aR antagonist is selected from PBF509 (NIR178) (Palobiofarma/Novartis), CPI444/V81444 (Corvus/Genentech), AZD4635/HTL-1071 (AstraZeneca/Heptares), Vipadenant (Redox/Juno), GBV-2034 (Globavir), AB928 25 (Arcus Biosciences), Theophylline, Istradefylline (Kyowa Hakko Kogyo), Tozadenant/SYN-115 (Acorda), KW-6356 (Kyowa Hakko Kogyo), ST-4206 (Leadiant Biosciences), and Preladenant/SCH 420814 (Merck/Schering).

Exemplary A2aR antagonists

In some embodiments, the A2aR antagonist comprises PBF509 (NIR178) or a compound disclosed 30 in U.S. Patent No. 8,796,284 or in International Application Publication No. WO 2017/025918, herein incorporated by reference in their entirety. PBF509 (NIR178) is also known as NIR178. Other Exemplary A2aR antagonists

In certain embodiments, the A2aR antagonist comprises CPI444/V81444. CPI-444 and other A2aR antagonists are disclosed in International Application Publication No. WO 2009/156737, herein incorporated by reference in its entirety. In certain embodiments, the A2aR antagonist is (S)-7-(5- 5 methylfuran-2-yl)-3-((6-(((tetrahydrofuran-3-yl)oxy)methyl)p yridin-2-yl)methyl)-3H-[1,2,3]triazolo[4,5- d]pyrimidin-5-amine. In certain embodiments, the A2aR antagonist is (R)-7-(5-methylfuran-2-yl)-3-((6- (((tetrahydrofuran-3-yl)oxy)methyl)pyridin-2-yl)methyl)-3H-[ 1,2,3]triazolo[4,5-d]pyrimidin-5-amine, or racemate thereof. In certain embodiments, the A2aR antagonist is 7-(5-methylfuran-2-yl)-3-((6- (((tetrahydrofuran-3-yl)oxy)methyl)pyridin-2-yl)methyl)-3H-[ 1,2,3]triazolo[4,5-d]pyrimidin-5-amine. 10 In certain embodiments, the A2aR antagonist is AZD4635/HTL-1071. A2aR antagonists are disclosed in International Application Publication No. WO 2011/095625, herein incorporated by reference in its entirety. In certain embodiments, the A2aR antagonist is 6-(2-chloro-6-methylpyridin-4-yl)-5-(4- fluorophenyl)-1,2,4-triazin-3-amine.

In certain embodiments, the A2aR antagonist is ST-4206 (Leadiant Biosciences). In certain 15 embodiments, the A2aR antagonist is an A2aR antagonist described in U.S. Patent No.9,133,197, herein incorporated by reference in its entirety.

In certain embodiments, the A2aR antagonist is an A2aR antagonist described in U.S. Patent Nos. 8,114,845 and 9,029,393, U.S. Application Publication Nos. 2017/0015758 and 2016/0129108, herein incorporated by reference in their entirety.

20 In some embodiments, the A2aR antagonist is istradefylline (CAS Registry Number: 155270-99- 8). Istradefylline is also known as KW-6002 or 8-[(E)-2-(3,4-dimethoxyphenyl)vinyl]-1,3-diethyl-7- methyl-3,7-dihydro-1H-purine-2,6-dione. Istradefylline is disclosed, e.g., in LeWitt et al. (2008) Annals of Neurology 63 (3): 295–302).

In some embodiments, the A2aR antagonist is tozadenant (Biotie). Tozadenant is also known as25 SYN115 or 4-hydroxy-N-(4-methoxy-7-morpholin-4-yl-1,3-benzothiazol-2-y l)-4-methylpiperidine-1- carboxamide. Tozadenant blocks the effect of endogenous adenosine at the A2a receptors, resulting in the potentiation of the effect of dopamine at the D2 receptor and inhibition of the effect of glutamate at the mGluR5 receptor. In some embodiments, the A2aR antagonist is preladenant (CAS Registry Number: 377727-87-2). Preladenant is also known as SCH 420814 or 2-(2-Furanyl)-7-[2-[4-[4-(2- 30 methoxyethoxy)phenyl]-1-piperazinyl]ethyl]7H-pyrazolo[4,3-e] [1,2,4]triazolo[1,5-c]pyrimidine-5-amine.

Preladenant was developed as a drug that acted as a potent and selective antagonist at the adenosine A2A receptor.

In some embodiments, the A2aR antagonist is vipadenan. Vipadenan is also known as BIIB014, V2006, or 3-[(4-amino-3-methylphenyl)methyl]-7-(furan-2-yl)triazolo[4, 5-d]pyrimidin-5-amine. Other 35 exemplary A2aR antagonists include, e.g., ATL-444, MSX-3, SCH-58261, SCH-412,348, SCH-442,416, VER-6623, VER-6947, VER-7835, CGS-15943, and ZM-241,385. In some embodiments, the A2aR antagonist is an A2aR pathway antagonist (e.g., a CD-73 inhibitor, e.g., an anti-CD73 antibody) is MEDI9447. MEDI9447 is a monoclonal antibody specific for CD73. Targeting the extracellular production of adenosine by CD73 may reduce the immunosuppressive effects of adenosine. MEDI9447 was reported to have a range of activities, e.g., inhibition of CD73 5 ectonucleotidase activity, relief from AMP-mediated lymphocyte suppression, and inhibition of syngeneic tumor growth. MEDI9447 can drive changes in both myeloid and lymphoid infiltrating leukocyte populations within the tumor microenvironment. These changes include, e.g., increases in CD8 effector cells and activated macrophages, as well as a reduction in the proportions of myeloid-derived suppressor cells (MDSC) and regulatory T lymphocytes.

10 IDO Inhibitors

In some embodiments, an inhibitor of indoleamine 2,3-dioxygenase (IDO) and/or tryptophan 2,3- dioxygenase (TDO) is used in combination with the compounds of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for treating a disease, e.g., cancer. In some embodiments, the IDO inhibitor is chosen from (4E)-4-[(3-chloro-4-fluoroanilino)- 15 nitrosomethylidene]-1,2,5-oxadiazol-3-amine (also known as epacadostat or INCB24360), indoximod (), (1-methyl-D-tryptophan), a-cyclohexyl-5H-Imidazo[5,1-a]isoindole-5-ethanol (also known as NLG919), indoximod, and BMS-986205 (formerly F001287).

Exemplary IDO inhibitors

In some embodiments, the IDO/TDO inhibitor is indoximod (New Link Genetics). Indoximod, the 20 D isomer of 1-methyl-tryptophan, is an orally administered small-molecule indoleamine 2,3-dioxygenase (IDO) pathway inhibitor that disrupts the mechanisms by which tumors evade immune-mediated destruction.

In some embodiments, the IDO/TDO inhibitor is NLG919 (New Link Genetics). NLG919 is a potent IDO (indoleamine-(2,3)-dioxygenase) pathway inhibitor with Ki/EC50 of 7 nM/75 nM in cell-free 25 assays.

In some embodiments, the IDO/TDO inhibitor is epacadostat (CAS Registry Number: 1204669- 58-8). Epacadostat is also known as INCB24360 or INCB024360 (Incyte). Epacadostat is a potent and selective indoleamine 2,3-dioxygenase (IDO1) inhibitor with IC50 of 10 nM, highly selective over other related enzymes such as IDO2 or tryptophan 2,3-dioxygenase (TDO).

30 In some embodiments, the IDO/TDO inhibitor is F001287 (Flexus/BMS). F001287 is a small molecule inhibitor of indoleamine 2,3-dioxygenase 1 (IDO1).

STING Agonists

In some embodiments, a STING agonist is used in combination with the compounds of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for 35 treating a disease, e.g., cancer. In some embodiments, the STING agonist is cyclic dinucleotide, e.g., a cyclic dinucleotide comprising purine or pyrimidine nucleobases (e.g., adenosine, guanine, uracil, thymine, or cytosine nucleobases). In some embodiments, the nucleobases of the cyclic dinucleotide comprise the same nucleobase or different nucleobases.

In some embodiments, the STING agonist comprises an adenosine or a guanosine nucleobase. In some embodiments, the STING agonist comprises one adenosine nucleobase and one guanosine nucleobase. 5 In some embodiments, the STING agonist comprises two adenosine nucleobases or two guanosine nucleobases.

In some embodiments, the STING agonist comprises a modified cyclic dinucleotide, e.g., comprising a modified nucleobase, a modified ribose, or a modified phosphate linkage. In some embodiments, the modified cyclic dinucleotide comprises a modified phosphate linkage, e.g., a 10 thiophosphate.

In some embodiments, the STING agonist comprises a cyclic dinucleotide (e.g., a modified cyclic dinucleotide) with 2’,5’ or 3’,5’ phosphate linkages. In some embodiments, the STING agonist comprises a cyclic dinucleotide (e.g., a modified cyclic dinucleotide) with Rp or Sp stereochemistry around the phosphate linkages.

15 In some embodiments, the STING agonist is MK-1454 (Merck). MK-1454 is a cyclic dinucleotide Stimulator of Interferon Genes (STING) agonist that activates the STING pathway. Exemplary STING agonist are disclosed, e.g., in PCT Publication No. WO 2017/027645.

Galectin Inhibitors

In some embodiments, a Galectin, e.g., Galectin-1 or Galectin-3, inhibitor is used in combination 20 with the compounds of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for treating a disease, e.g., cancer. In some embodiments, the combination comprises a Galectin-1 inhibitor and a Galectin-3 inhibitor. In some embodiments, the combination comprises a bispecific inhibitor (e.g., a bispecific antibody molecule) targeting both Galectin- 1 and Galectin-3. In some embodiments, the Galectin inhibitor is chosen from an anti-Galectin antibody 25 molecule, GR-MD-02 (Galectin Therapeutics), Galectin-3C (Mandal Med), Anginex, or OTX-008 (OncoEthix, Merck). Galectins are a family of proteins that bind to beta galactosidase sugars.

The Galectin family of proteins comprises at least of Galectin-1, Galectin-2, Galectin-3, Galectin- 4, Galectin-7, and Galectin-8. Galectins are also referred to as S-type lectins, and are soluble proteins with, e.g., intracellular and extracellular functions.

30 Galectin-1 and Galectin-3 are highly expressed in various tumor types. Galectin-1 and Galectin-3 can promote angiogenesis and/or reprogram myeloid cells toward a pro-tumor phenotype, e.g., enhance immunosuppression from myeloid cells. Soluble Galectin-3 can also bind to and/or inactivate infiltrating T cells.

Exemplary Galectin Inhibitors

35 In some embodiments, a Galectin inhibitor is an antibody molecule. In an embodiment, an antibody molecule is a monospecific antibody molecule and binds a single epitope. E.g., a monospecific antibody molecule having a plurality of immunoglobulin variable domain sequences, each of which binds the same epitope. In an embodiment, the Galectin inhibitor is an anti-Galectin, e.g., anti-Galectin-1 or anti-Galectin- 3, antibody molecule. In some embodiments, the Galectin inhibitor is an anti-Galectin-1 antibody molecule. In some embodiments, the Galectin inhibitor is an anti-Galectin-3 antibody molecule.

In an embodiment an antibody molecule is a multispecific antibody molecule, e.g., it comprises a 5 plurality of immunoglobulin variable domains sequences, wherein a first immunoglobulin variable domain sequence of the plurality has binding specificity for a first epitope and a second immunoglobulin variable domain sequence of the plurality has binding specificity for a second epitope. In an embodiment, the first and second epitopes are on the same antigen, e.g., the same protein (or subunit of a multimeric protein). In an embodiment, the first and second epitopes overlap. In an embodiment, the first and second epitopes do 10 not overlap. In an embodiment, the first and second epitopes are on different antigens, e.g., the different proteins (or different subunits of a multimeric protein). In an embodiment, a multispecific antibody molecule comprises a third, fourth or fifth immunoglobulin variable domain. In an embodiment, a multispecific antibody molecule is a bispecific antibody molecule, a trispecific antibody molecule, or tetraspecific antibody molecule.

15 In an embodiment, the Galectin inhibitor is a multispecific antibody molecule. In an embodiment, a multispecific antibody molecule is a bispecific antibody molecule. A bispecific antibody has specificity for no more than two antigens. A bispecific antibody molecule is characterized by a first immunoglobulin variable domain sequence which has binding specificity for a first epitope and a second immunoglobulin variable domain sequence that has binding specificity for a second epitope. In an embodiment, the first and 20 second epitopes are on the same antigen, e.g., the same protein (or subunit of a multimeric protein). In an embodiment, the first and second epitopes overlap. In an embodiment, the first and second epitopes do not overlap. In an embodiment, the first and second epitopes are on different antigens, e.g., the different proteins (or different subunits of a multimeric protein). In an embodiment a bispecific antibody molecule comprises a heavy chain variable domain sequence and a light chain variable domain sequence which have binding 25 specificity for a first epitope and a heavy chain variable domain sequence and a light chain variable domain sequence which have binding specificity for a second epitope. In an embodiment, a bispecific antibody molecule comprises a half antibody having binding specificity for a first epitope and a half antibody having binding specificity for a second epitope. In an embodiment, a bispecific antibody molecule comprises a half antibody, or fragment thereof, having binding specificity for a first epitope and a half antibody, or fragment 30 thereof, having binding specificity for a second epitope. In an embodiment, a bispecific antibody molecule comprises a scFv, or fragment thereof, have binding specificity for a first epitope and a scFv, or fragment thereof, have binding specificity for a second epitope. In an embodiment, the Galectin inhibitor is a bispecific antibody molecule. In an embodiment, the first epitope is located on Galectin-1, and the second epitope is located on Galectin-3.

35 Protocols for generating bispecific or heterodimeric antibody molecules are known in the art; including but not limited to, for example, the“knob in a hole” approach described in, e.g., US 5731168; the electrostatic steering Fc pairing as described in, e.g., WO 09/089004, WO 06/106905 and WO 2010/129304; Strand Exchange Engineered Domains (SEED) heterodimer formation as described in, e.g., WO 07/110205; Fab arm exchange as described in, e.g., WO 08/119353, WO 2011/131746, and WO 2013/060867; double antibody conjugate, e.g., by antibody cross-linking to generate a bi-specific structure using a heterobifunctional reagent having an amine-reactive group and a sulfhydryl reactive group as 5 described in, e.g., US4433059; bispecific antibody determinants generated by recombining half antibodies (heavy-light chain pairs or Fabs) from different antibodies through cycle of reduction and oxidation of disulfide bonds between the two heavy chains, as described in, e.g., US 4444878; trifunctional antibodies, e.g., three Fab' fragments cross-linked through sulfhdryl reactive groups, as described in, e.g., US 5273743; biosynthetic binding proteins, e.g., pair of scFvs cross-linked through C-terminal tails preferably through 10 disulfide or amine-reactive chemical cross-linking, as described in, e.g., US 5534254; bifunctional antibodies, e.g., Fab fragments with different binding specificities dimerized through leucine zippers (e.g., c-fos and c-jun) that have replaced the constant domain, as described in, e.g., US 5582996; bispecific and oligospecific mono-and oligovalent receptors, e.g., VH-CH1 regions of two antibodies (two Fab fragments) linked through a polypeptide spacer between the CH1 region of one antibody and the VH region of the15 other antibody typically with associated light chains, as described in, e.g., US 5591828; bispecific DNA- antibody conjugates, e.g., crosslinking of antibodies or Fab fragments through a double stranded piece of DNA, as described in, e.g., US 5635602; bispecific fusion proteins, e.g., an expression construct containing two scFvs with a hydrophilic helical peptide linker between them and a full constant region, as described in, e.g., US 5637481; multivalent and multispecific binding proteins, e.g., dimer of polypeptides having 20 first domain with binding region of Ig heavy chain variable region, and second domain with binding region of Ig light chain variable region, generally termed diabodies (higher order structures are also disclosed creating bispecific, trispecific, or tetraspecific molecules, as described in, e.g., US 5837242; minibody constructs with linked VL and VH chains further connected with peptide spacers to an antibody hinge region and CH3 region, which can be dimerized to form bispecific/multivalent molecules, as described in, 25 e.g., US 5837821; VH and VL domains linked with a short peptide linker (e.g., 5 or 10 amino acids) or no linker at all in either orientation, which can form dimers to form bispecific diabodies; trimers and tetramers, as described in, e.g., US 5844094; String of VH domains (or VL domains in family members) connected by peptide linkages with crosslinkable groups at the C-terminus further associated with VL domains to form a series of FVs (or scFvs), as described in, e.g., US 5864019; and single chain binding polypeptides with 30 both a VH and a VL domain linked through a peptide linker are combined into multivalent structures through non-covalent or chemical crosslinking to form, e.g., homobivalent, heterobivalent, trivalent, and tetravalent structures using both scFV or diabody type format, as described in, e.g., US 5869620. Additional exemplary multispecific and bispecific molecules and methods of making the same are found, for example, in US 5910573, US 5932448, US 5959083, US 5989830, US 6005079, US 6239259, US 6294353, US 35 6333396, US 6476198, US 6511663, US 6670453, US 6743896, US 6809185, US 6833441, US 7129330, US 7183076, US 7521056, US 7527787, US 7534866, US 7612181, US2002/004587A1, US2002/076406A1, US2002/103345A1, US2003/207346A1, US2003/211078A1, US2004/219643A1, US2004/220388A1, US2004/242847A1, US2005/003403A1, US2005/004352A1, US2005/069552A1, US2005/079170A1, US2005/100543A1, US2005/136049A1, US2005/136051A1, US2005/163782A1, US2005/266425A1, US2006/083747A1, US2006/120960A1, US2006/204493A1, US2006/263367A1, US2007/004909A1, US2007/087381A1, US2007/128150A1, US2007/141049A1, US2007/154901A1, 5 US2007/274985A1, US2008/050370A1, US2008/069820A1, US2008/152645A1, US2008/171855A1, US2008/241884A1, US2008/254512A1, US2008/260738A1, US2009/130106A1, US2009/148905A1, US2009/155275A1, US2009/162359A1, US2009/162360A1, US2009/175851A1, US2009/175867A1, US2009/232811A1, US2009/234105A1, US2009/263392A1, US2009/274649A1, EP346087A2, WO00/06605A2, WO02/072635A2, WO04/081051A1, WO06/020258A2, WO2007/044887A2, 10 WO2007/095338A2, WO2007/137760A2, WO2008/119353A1, WO2009/021754A2, WO2009/068630A1, WO91/03493A1, WO93/23537A1, WO94/09131A1, WO94/12625A2, WO95/09917A1, WO96/37621A2, WO99/64460A1. The contents of the above-referenced applications are incorporated herein by reference in their entireties.

In other embodiments, the anti-Galectin, e.g., anti-Galectin-1 or anti-Galectin-3, antibody molecule 15 (e.g., a monospecific, bispecific, or multispecific antibody molecule) is covalently linked, e.g., fused, to another partner e.g., a protein, e.g., as a fusion molecule for example a fusion protein. In one embodiment, a bispecific antibody molecule has a first binding specificity to a first target (e.g., to Galectin-1), a second binding specificity to a second target (e.g., Galectin-3).

This invention provides an isolated nucleic acid molecule encoding the above antibody molecule, 20 vectors and host cells thereof. The nucleic acid molecule includes but is not limited to RNA, genomic DNA and cDNA.

In some embodiments, a Galectin inhibitor is a peptide, e.g., protein, which can bind to, and inhibit Galectin, e.g., Galectin-1 or Galectin-3, function. In some embodiments, the Galectin inhibitor is a peptide which can bind to, and inhibit Galectin-3 function. In some embodiments, the Galectin inhibitor is the 25 peptide Galectin-3C. In some embodiments, the Galectin inhibitor is a Galectin-3 inhibitor disclosed in U.S.

Patent 6,770,622, which is hereby incorporated by reference in its entirety.

Galectin-3C is an N-terminal truncated protein of Galectin-3, and functions, e.g., as a competitive inhibitor of Galectin-3. Galectin-3C prevents binding of endogenous Galectin-3 to e.g., laminin on the surface of, e.g., cancer cells, and other beta-galactosidase glycoconjugates in the extracellular matrix 30 (ECM). Galectin-3C and other exemplary Galectin inhibiting peptides are disclosed in U.S. Patent 6,770,622.

In some embodiments, Galectin-3C comprises the amino acid sequence of SEQ ID NO: 279, or an amino acid substantially identical (e.g., 90, 95 or 99%) identical thereto.

GAPAGPLIVPYNLPLPGGVVPRMLITILGTVKPNANRIALDFQRGNDVAFHFNPRFNENN RRVIVC

35 NTKLDNNWGREERQSVFPFESGKPFKIQVLVEPDHFKVAVNDAHLLQYNHRVKKLNEISK LGIS GDIDITSASYTMI (SEQ ID NO: 279). In some embodiments, the Galectin inhibitor is a peptide, which can bind to, and inhibit Galectin- 1 function. In some embodiments, the Galectin inhibitor is the peptide Anginex: Anginex is an anti- angiongenic peptide that binds Galectin-1 (Salomonsson E, et al., (2011) Journal of Biological Chemistry, 286(16):13801-13804). Binding of Anginex to Galectin-1 can interfere with, e.g., the pro-angiongenic 5 effects of Galectin-1.

In some embodiments, the Galectin, e.g., Galectin-1 or Galectin-3, inhibitor is a non-peptidic topomimetic molecule. In some embodiments, the non-peptidic topomimetic Galectin inhibitor is OTX-008 (OncoEthix). In some embodiments, the non-peptidic topomimetic is a non-peptidic topomimetic disclosed in U.S. Patent 8,207,228, which is herein incorporated by reference in its entirety. OTX-008, also known 10 as PTX-008 or Calixarene 0118, is a selective allosteric inhibitor of Galectin-1. OTX-008 has the chemical name: N-[2-(dimethylamino)ethyl]-2-{[26,27,28-tris({[2- (dimethylamino)ethyl]carbamoyl}methoxy)pentacyclo[19.3.1.1,7 .1,.15,]octacosa- 1(25),3(28),4,6,9(27),1012,15,17,19(26),21,23-dodecaen-25-yl ]oxy}acetamide.

In some embodiments, the Galectin, e.g., Galectin-1 or Galectin-3, inhibitor is a carbohydrate based 15 compound. In some embodiments, the Galectin inhibitor is GR-MD-02 (Galectin Therapeutics).

In some embodiments, GR-MD-02 is a Galectin-3 inhibitor. GR-MD-02 is a galactose-pronged polysaccharide also referred to as, e.g., a galactoarabino-rhamnogalaturonate. GR-MD-02 and other galactose-pronged polymers, e.g., galactoarabino-rhamnogalaturonates, are disclosed in U.S. Patent 8,236,780 and U.S. Publication 2014/0086932, the entire contents of which are herein incorporated by 20 reference in their entirety.

MEK inhibitors

In some embodiments, a MEK inhibitor is used in combination with the compounds of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for treating a disease, e.g., cancer. In some embodiments, the MEK inhibitor is chosen from Trametinib,25 selumetinib, AS703026, BIX 02189, BIX 02188, CI-1040, PD0325901, PD98059, U0126, XL-518, G- 38963, or G02443714. In some embodiments, the MEK inhibitor is Trametinib.

Exemplary MEK inhibitors

In some embodiments, the MEK inhibitor is trametinib. Trametinib is also known as JTP-74057, TMT212, N-(3-{3-cyclopropyl-5-[(2-fluoro-4-iodophenyl)amino]-6,8-dim ethyl-2,4,7-trioxo-3,4,6,7- 30 tetrahydropyrido[4,3-d]pyrimidin-1(2H)-yl}phenyl)acetamide, or Mekinist (CAS Number 871700-17-3).

Other Exemplary MEK inhibitors

In some embodiments the MEK inhibitor comprises selumetinib which has the chemical name: (5- [(4-bromo-2-chlorophenyl)amino]-4-fluoro-N-(2-hydroxyethoxy) -1-methyl-1H-benzimidazole-6- carboxamide. Selumetinib is also known as AZD6244 or ARRY 142886, e.g., as described in PCT 35 Publication No. WO2003077914.

In some embodiments, the MEK inhibitor comprises AS703026, BIX 02189 or BIX 02188. In some embodiments, the MEK inhibitor comprises 2-[(2-Chloro-4-iodophenyl)amino]-N- (cyclopropylmethoxy)-3,4-difluoro-benzamide (also known as CI-1040 or PD184352), e.g., as described in PCT Publication No. WO2000035436).

In some embodiments, the MEK inhibitor comprises N-[(2R)-2,3-Dihydroxypropoxy]-3,4- 5 difluoro-2-[(2-fluoro-4-iodophenyl)amino]- benzamide (also known as PD0325901), e.g., as described in PCT Publication No. WO2002006213).

In some embodiments, the MEK inhibitor comprises 2’-amino-3’-methoxyflavone (also known as PD98059) which is available from Biaffin GmbH & Co., KG, Germany.

In some embodiments, the MEK inhibitor comprises 2,3-bis[amino[(2- 10 aminophenyl)thio]methylene]-butanedinitrile (also known as U0126), e.g., as described in US Patent No.

2,779,780).

In some embodiments, the MEK inhibitor comprises XL-518 (also known as GDC-0973) which has a CAS No.1029872-29-4 and is available from ACC Corp.

In some embodiments, the MEK inhibitor comprises G-38963.

15 In some embodiments, the MEK inhibitor comprises G02443714 (also known as AS703206)

Additional examples of MEK inhibitors are disclosed in WO 2013/019906, WO 03/077914, WO 2005/121142, WO 2007/04415, WO 2008/024725 and WO 2009/085983, the contents of which are incorporated herein by reference. Further examples of MEK inhibitors include, but are not limited to, 2,3- Bis[amino[(2-aminophenyl)thio]methylene]-butanedinitrile (also known as U0126 and described in US20 Patent No.2,779,780); (3S,4R,5Z,8S,9S,11E)-14-(Ethylamino)-8,9,16-trihydroxy-3,4-d imethyl-3,4,9, 19- tetrahydro-1H-2-benzoxacyclotetradecine-1,7(8H)-dione] (also known as E6201, described in PCT Publication No. WO2003076424); vemurafenib (PLX-4032, CAS 918504-65-1); (R)-3-(2,3- Dihydroxypropyl)-6-fluoro-5-(2-fluoro-4-iodophenylamino)-8-m ethylpyrido[2,3-d]pyrimidine- 4,7(3H,8H)-dione (TAK-733, CAS 1035555-63-5); pimasertib (AS-703026, CAS 1204531-26-9); 2-(2-25 Fluoro-4-iodophenylamino)-N-(2-hydroxyethoxy)-1,5-dimethyl-6 -oxo-1,6-dihydropyridine-3- carboxamide (AZD 8330); and 3,4-Difluoro-2-[(2-fluoro-4-iodophenyl)amino]-N-(2-hydroxyet hoxy)-5- [(3-oxo-[1,2]oxazinan-2-yl)methyl]benzamide (CH 4987655 or Ro 4987655).

c-MET Inhibitors

In some embodiments, a c-MET inhibitor is used in combination with the compounds of Formula 30 (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for treating a disease, e.g., cancer. c-MET, a receptor tyrosine kinase overexpressed or mutated in many tumor cell types, plays key roles in tumor cell proliferation, survival, invasion, metastasis, and tumor angiogenesis. Inhibition of c-MET may induce cell death in tumor cells overexpressing c-MET protein or expressing constitutively activated c-MET protein.

35 In some embodiments, the c-MET inhibitor is chosen from capmatinib (INC280), JNJ-3887605, AMG 337, LY2801653, MSC2156119J, crizotinib, tivantinib, or golvatinib. Exemplary c-MET Inhibitors

In some embodiments, the c-MET inhibitor comprises capmatinib (INC280), or a compound described in U.S. Patent Nos.7,767,675, and US 8,461,330, which are incorporated by reference in their entirety.

5 Other Exemplary c-MET Inhibitors

In some embodiments, the c-MET inhibitor comprises JNJ-38877605. JNJ-38877605 is an orally available, small molecule inhibitor of c-Met. JNJ-38877605 selectively binds to c-MET, thereby inhibiting c-MET phosphorylation and disrupting c-Met signal transduction pathways.

In some embodiments, the c-Met inhibitor is AMG 208. AMG 208 is a selective small-molecule inhibitor 10 of c-MET. AMG 208 inhibits the ligand-dependent and ligand-independent activation of c-MET, inhibiting its tyrosine kinase activity, which may result in cell growth inhibition in tumors that overexpress c-Met.

In some embodiments, the c-Met inhibitor comprises AMG 337. AMG 337 is an orally bioavailable inhibitor of c-Met. AMG 337 selectively binds to c-MET, thereby disrupting c-MET signal transduction pathways.

15 In some embodiments, the c-Met inhibitor comprises LY2801653. LY2801653 is an orally available, small molecule inhibitor of c-Met. LY2801653 selectively binds to c-MET, thereby inhibiting c- MET phosphorylation and disrupting c-Met signal transduction pathways.

In some embodiments, c-Met inhibitor comprises MSC2156119J. MSC2156119J is an orally bioavailable inhibitor of c-Met. MSC2156119J selectively binds to c-MET, which inhibits c-MET 20 phosphorylation and disrupts c-Met-mediated signal transduction pathways.

In some embodiments, the c-MET inhibitor is capmatinib. Capmatinib is also known as INCB028060. Capmatinib is an orally bioavailable inhibitor of c-MET. Capmatinib selectively binds to c- Met, thereby inhibiting c-Met phosphorylation and disrupting c-Met signal transduction pathways.

In some embodiments, the c-MET inhibitor comprises crizotinib. Crizotinib is also known as PF- 25 02341066. Crizotinib is an orally available aminopyridine-based inhibitor of the receptor tyrosine kinase anaplastic lymphoma kinase (ALK) and the c-Met/hepatocyte growth factor receptor (HGFR). Crizotinib, in an ATP-competitive manner, binds to and inhibits ALK kinase and ALK fusion proteins. In addition, crizotinib inhibits c-Met kinase, and disrupts the c-Met signaling pathway. Altogether, this agent inhibits tumor cell growth.

30 In some embodiments, the c-MET inhibitor comprises golvatinib. Golvatinib is an orally bioavailable dual kinase inhibitor of c-MET and VEGFR-2 with potential antineoplastic activity. Golvatinib binds to and inhibits the activities of both c-MET and VEGFR-2, which may inhibit tumor cell growth and survival of tumor cells that overexpress these receptor tyrosine kinases.

In some embodiments, the c-MET inhibitor is tivantinib. Tivantinib is also known as ARQ 197. 35 Tivantinib is an orally bioavailable small molecule inhibitor of c-MET. Tivantinib binds to the c-MET protein and disrupts c-Met signal transduction pathways, which may induce cell death in tumor cells overexpressing c-MET protein or expressing constitutively activated c-Met protein. TGF-b Inhibitors

In some embodiments, a transforming growth factor beta (also known as TGF-b TGFb, TGFb, or TGF-beta, used interchangeably herein) inhibitor is used in combination with the compounds of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for 5 treating a disease, e.g., cancer. In certain embodiments, a combination described herein comprises a transforming growth factor beta (also known as TGF-b TGFb, TGFb, or TGF-beta, used interchangeably herein) inhibitor.

TGF-b belongs to a large family of structurally-related cytokines including, e.g., bone morphogenetic proteins (BMPs), growth and differentiation factors, activins and inhibins. In some10 embodiments, the TGF-b inhibitors described herein can bind and/or inhibit one or more isoforms of TGF- b (e.g., one, two, or all of TGF-b1, TGF-b2, or TGF-b3).

Under normal conditions, TGF-b maintains homeostasis and limits the growth of epithelial, endothelial, neuronal and hematopoietic cell lineages, e.g., through the induction of anti-proliferative and apoptotic responses. Canonical and non-canonical signaling pathways are involved in cellular responses to15 TGF-b. Activation of the TGF-b/Smad canonical pathway can mediate the anti-proliferative effects of TGF- b. The non-canonical TGF-b pathway can activate additional intra-cellular pathways, e.g., mitogen- activated protein kinases (MAPK), phosphatidylinositol 3 kinase/Protein Kinase B, Rho-like GTPases (Tian et al. Cell Signal. 2011; 23(6):951-62; Blobe et al. N Engl J Med. 2000; 342(18):1350-8), thus modulating epithelial to mesenchymal transition (EMT) and/or cell motility.

20 Alterations of TGF-b signaling pathway are associated with human diseases, e.g., cancers, cardio- vascular diseases, fibrosis, reproductive disorders, and wound healing. Without wishing to be bound by theory, it is believed that in some embodiments, the role of TGF-b in cancer is dependent on the disease setting (e.g., tumor stage and genetic alteration) and/or cellular context. For example, in late stages of cancer, TGF-b can modulate a cancer-related process, e.g., by promoting tumor growth (e.g., inducing EMT), 25 blocking anti-tumor immune responses, increasing tumor-associated fibrosis, or enhancing angiogenesis (Wakefield and Hill Nat Rev Cancer. 2013; 13(5):328-41). In certain embodiments, a combination comprising a TGF-b inhibitor described herein is used to treat a cancer in a late stage, a metastatic cancer, or an advanced cancer.

Preclinical evidence indicates that TGF-b plays an important role in immune regulation 30 (Wojtowicz-Praga Invest New Drugs.2003; 21(1):21-32; Yang et al. Trends Immunol.2010; 31(6):220-7).

TGF-b can down-regulate the host-immune response via several mechanisms, e.g., shift of the T-helper balance toward Th2 immune phenotype; inhibition of anti-tumoral Th1 type response and M1-type macrophages; suppression of cytotoxic CD8+ T lymphocytes (CTL), NK lymphocytes and dendritic cell functions, generation of CD4+CD25+ T-regulatory cells; or promotion of M2-type macrophages with pro-35 tumoral activity mediated by secretion of immunosuppressive cytokines (e.g., IL10 or VEGF), pro- inflammatory cytokines (e.g., IL6, TNFa, or IL1) and generation of reactive oxygen species (ROS) with genotoxic activity (Yang et al. Trends Immunol.2010; 31(6):220-7; Truty and Urrutia Pancreatology.2007; 7(5-6):423-35; Achyut et al Gastroenterology.2011; 141(4):1167-78).

Exemplary TGF-b Inhibitors

In some embodiments, the TGF-b inhibitor comprises XOMA 089, or a compound disclosed in 5 International Application Publication No. WO 2012/167143, which is incorporated by reference in its entirety.

XOMA 089 is also known as XPA.42.089. XOMA 089 is a fully human monoclonal antibody that specifically binds and neutralizes TGF-beta 1 and 2 ligands.

The heavy chain variable region of XOMA 089 has the amino acid sequence of:10 QVQLVQSGAEVKKPGSSVKVSCKASGGTFSSYAISWVRQAPGQGLEWMGGIIPIFGTANY AQKF QGRVTITADESTSTAYMELSSLRSEDTAVYYCARGLWEVRALPSVYWGQGTLVTVSS (SEQ ID NO: 284) (disclosed as SEQ ID NO: 6 in WO 2012/167143). The light chain variable region of XOMA 089 has the amino acid sequence of: SYELTQPPSVSVAPGQTARITCGANDIGSKSVHWYQQKAGQAPVLVVSEDIIRPSGIPER ISGSNSG

15 NTATLTISRVEAGDEADYYCQVWDRDSDQYVFGTGTKVTVLG (SEQ ID NO: 285) (disclosed as SEQ ID NO: 8 in WO 2012/167143).

XOMA 089 binds with high affinity to the human TGF-b isoforms. Generally, XOMA 089 binds with high affinity to TGF-b1 and TGF-b2, and to a lesser extent to TGF-b3. In Biacore assays, the K _D of XOMA 089 on human TGF-b is 14.6 pM for TGF-b1, 67.3 pM for TGF-b2, and 948 pM for TGF-b3. Given 20 the high affinity binding to all three TGF-b isoforms, in certain embodiments, XOMA 089 is expected to bind to TGF-b1, 2 and 3 at a dose of XOMA 089 as described herein. XOMA 089 cross-reacts with rodent and cynomolgus monkey TGF-b and shows functional activity in vitro and in vivo, making rodent and cynomolgus monkey relevant species for toxicology studies.

Other Exemplary TGF-b Inhibitors

25 In some embodiments, the TGF-b inhibitor comprises fresolimumab (CAS Registry Number:

948564-73-6). Fresolimumab is also known as GC1008. Fresolimumab is a human monoclonal antibody that binds to and inhibits TGF-beta isoforms 1, 2 and 3.

The heavy chain of fresolimumab has the amino acid sequence of: QVQLVQSGAEVKKPGSSVKVSCKASGYTFSSNVISWVRQAPGQGLEWMGGVIPIVDIANY AQRF

30 KGRVTITADESTSTTYMELSSLRSEDTAVYYCASTLGLVLDAMDYWGQGTLVTVSSASTK GPSV FPLAPCSRSTSESTAALGCLVKDYFPEPVTVSWNSGALTSGVHTFPAVLQSSGLYSLSSV VTVPSS SLGTKTYTCNVDHKPSNTKVDKRVESKYGPPCPSCPAPEFLGGPSVFLFPPKPKDTLMIS RTPEVT CVVVDVSQEDPEVQFNWYVDGVEVHNAKTKPREEQFNSTYRVVSVLTVLHQDWLNGKEYK CK VSNKGLPSSIEKTISKAKGQPREPQVYTLPPSQEEMTKNQVSLTCLVKGFYPSDIAVEWE SNGQPE

35 NNYKTTPPVLDSDGSFFLYSRLTVDKSRWQEGNVFSCSVMHEALHNHYTQKSLSLSLGK (SEQ ID NO: 280). The light chain of fresolimumab has the amino acid sequence of: ETVLTQSPGTLSLSPGERATLSCRASQSLGSSYLAWYQQKPGQAPRLLIYGASSRAPGIP DRFSGS GSGTDFTLTISRLEPEDFAVYYCQQYADSPITFGQGTRLEIKRTVAAPSVFIFPPSDEQL KSGTASV VCLLNNFYPREAKVQWKVDNALQSGNSQESVTEQDSKDSTYSLSSTLTLSKADYEKHKVY ACE

5 VTHQGLSSPVTKSFNRGEC (SEQ ID NO: 281).

Fresolimumab is disclosed, e.g., in International Application Publication No. WO 2006/086469, and U.S. Patent Nos.8,383,780 and 8,591,901, which are incorporated by reference in their entirety. IL-1b inhibitors

The Interleukin-1 (IL-1) family of cytokines is a group of secreted pleotropic cytokines with a 10 central role in inflammation and immune response. Increases in IL-1 are observed in multiple clinical settings including cancer (Apte et al. (2006) Cancer Metastasis Rev. p.387-408; Dinarello (2010) Eur. J. Immunol. p.599-606). The IL-1 family comprises, inter alia, IL-1 beta (IL-1b), and IL-1alpha (IL-1a). IL- 1b is elevated in lung, breast and colorectal cancer (Voronov et al. (2014) Front Physiol. p. 114) and is associated with poor prognosis (Apte et al. (2000) Adv. Exp. Med. Biol. p.277-88). Without wishing to be 15 bound by theory, it is believed that in some embodiments, secreted IL-1b, derived from the tumor microenvironment and by malignant cells, promotes tumor cell proliferation, increases invasiveness and dampens anti-tumor immune response, in part by recruiting inhibitory neutrophils (Apte et al. (2006) Cancer Metastasis Rev. p.387-408; Miller et al. (2007) J. Immunol. p.6933-42). Experimental data indicate that inhibition of IL-1b results in a decrease in tumor burden and metastasis (Voronov et al. (2003) Proc. 20 Natl. Acad. Sci. U.S.A. p.2645-50).

In some embodiments, an interleukin-1 beta (IL-1b) inhibitor is used in combination with the compounds of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for treating a disease, e.g., cancer. In some embodiments, the IL-1b inhibitor is chosen from canakinumab, gevokizumab, Anakinra, or Rilonacept. In some embodiments, the IL-1b inhibitor is 25 canakinumab.

Exemplary IL-1b inhibitors

In some embodiments, the IL-1b inhibitor is canakinumab. Canakinumab is also known as ACZ885 or ILARIS®. Canakinumab is a human monoclonal IgG1/k antibody that neutralizes the bioactivity of human IL-1b.

30 Canakinumab is disclosed, e.g., in WO 2002/16436, US 7,446,175, and EP 1313769. The heavy chain variable region of canakinumab has the amino acid sequence of: MEFGLSWVFLVALLRGVQCQVQLVESGGGVVQPGRSLRLSCAASGFTFSVYGMNWVRQAP GK GLEWVAIIWYDGDNQYYADSVKGRFTISRDNSKNTLYLQMNGLRAEDTAVYYCARDLRTG PFD YWGQGTLVTVSS (SEQ ID NO: 282) (disclosed as SEQ ID NO: 1 in US 7,446,175). The light chain 35 variable region of canakinumab has the amino acid sequence of:

MLPSQLIGFLLLWVPASRGEIVLTQSPDFQSVTPKEKVTITCRASQSIGSSLHWYQQKPD QSPKLLI KYASQSFSGVPSRFSGSGSGTDFTLTINSLEAEDAAAYYCHQSSSLPFTFGPGTKVDIK (SEQ ID NO: 283) (disclosed as SEQ ID NO: 2 in US 7,446,175).

Canakinumab has been used, e.g., for the treatment of Cryopyrin Associated Periodic Syndromes (CAPS), in adults and children, for the treatment of systemic juvenile idiopathic arthritis (SJIA), for the 5 symptomatic treatment of acute gouty arthritis attacks in adults, and for other IL-1b driven inflammatory diseases. Without wishing to be bound by theory, it is believed that in some embodiments, IL-1b inhibitors, e.g., canakinumab, can increase anti-tumor immune response, e.g., by blocking one or more functions of IL-1b including, e.g., recruitment of immunosuppressive neutrophils to the tumor microenvironment, stimulation of tumor angiogenesis, and/or promotion of metastasis (Dinarello (2010) Eur. J. Immunol. p. 10 599-606).

In some embodiments, the combination described herein includes an IL-1b inhibitor, canakinumab, or a compound disclosed in WO 2002/16436, and an inhibitor of an immune checkpoint molecule, e.g., an inhibitor of PD-1 (e.g., an anti-PD-1 antibody molecule). IL-1 is a secreted pleotropic cytokine with a central role in inflammation and immune response. Increases in IL-1 are observed in multiple clinical 15 settings including cancer (Apte et al. (2006) Cancer Metastasis Rev. p.387-408; Dinarello (2010) Eur. J.

Immunol. p.599-606). IL-1b is elevated in lung, breast and colorectal cancer (Voronov et al. (2014) Front Physiol. p.114) and is associated with poor prognosis (Apte et al. (2000) Adv. Exp. Med. Biol. p.277-88). Without wishing to be bound by theory, it is believed that in some embodiments, secreted IL-1b, derived from the tumor microenvironment and by malignant cells, promotes tumor cell proliferation, increases 20 invasiveness and dampens anti-tumor immune response, in part by recruiting inhibitory neutrophils (Apte et al. (2006) Cancer Metastasis Rev. p.387-408; Miller et al. (2007) J. Immunol. p.6933-42). Experimental data indicate that inhibition of IL-1b results in a decrease in tumor burden and metastasis (Voronov et al. (2003) Proc. Natl. Acad. Sci. U.S.A. p.2645-50). Canakinumab can bind IL-1b and inhibit IL-1-mediated signaling. Accordingly, in certain embodiments, an IL-1b inhibitor, e.g., canakinumab, enhances, or is used 25 to enhance, an immune-mediated anti-tumor effect of an inhibitor of PD-1 (e.g., an anti-PD-1 antibody molecule).

In some embodiments, the IL-1b inhibitor, canakinumab, or a compound disclosed in WO 2002/16436, and the inhibitor of an immune checkpoint molecule, e.g., an inhibitor of PD-1 (e.g., an anti- PD-1 antibody molecule), each is administered at a dose and/or on a time schedule, that in combination, 30 achieves a desired anti-tumor activity.

MDM2 inhibitors

In some embodiments, a mouse double minute 2 homolog (MDM2) inhibitor is used in combination with the compounds of Formula (I), or a pharmaceutically acceptable salt, hydrate, solvate, prodrug, stereoisomer, or tautomer thereof, for treating a disease, e.g., cancer. The human homolog of MDM2 is also 35 known as HDM2. In some embodiments, an MDM2 inhibitor described herein is also known as a HDM2 inhibitor. In some embodiments, the MDM2 inhibitor is chosen from HDM201 or CGM097. In an embodiment the MDM2 inhibitor comprises (S)-1-(4-chlorophenyl)-7-isopropoxy-6- methoxy-2-(4-(methyl(((1r,4S)-4-(4-methyl-3-oxopiperazin-1-y l)cyclohexyl)methyl)amino)phenyl)-1,2- dihydroisoquinolin-3(4H)-one (also known as CGM097) or a compound disclosed in PCT Publication No. WO 2011/076786 to treat a disorder, e.g., a disorder described herein). In one embodiment, a therapeutic 5 agent disclosed herein is used in combination with CGM097.

In an embodiment, an MDM2 inhibitor comprises an inhibitor of p53 and/or a p53/Mdm2 interaction. In an embodiment, the MDM2 inhibitor comprises (S)-5-(5-chloro-1-methyl-2-oxo-1,2- dihydropyridin-3-yl)-6-(4-chlorophenyl)-2-(2,4-dimethoxypyri midin-5-yl)-1-isopropyl-5,6- dihydropyrrolo[3,4-d]imidazol-4(1H)-one (also known as HDM201), or a compound disclosed in PCT 10 Publication No. WO2013/111105 to treat a disorder, e.g., a disorder described herein. In one embodiment, a therapeutic agent disclosed herein is used in combination with HDM201. In some embodiments, HDM201 is administered orally.

In one embodiment, the combination disclosed herein is suitable for the treatment of cancer in vivo. For example, the combination can be used to inhibit the growth of cancerous tumors. The combination can 15 also be used in combination with one or more of: a standard of care treatment (e.g., for cancers or infectious disorders), a vaccine (e.g., a therapeutic cancer vaccine), a cell therapy, a radiation therapy, surgery, or any other therapeutic agent or modality, to treat a disorder herein. For example, to achieve antigen-specific enhancement of immunity, the combination can be administered together with an antigen of interest.

EXAMPLES

20 The disclosure is further illustrated by the following examples and synthesis schemes, which are not to be construed as limiting this disclosure in scope or spirit to the specific procedures herein described. It is to be understood that the examples are provided to illustrate certain embodiments and that no limitation to the scope of the disclosure is intended thereby. It is to be further understood that resort may be had to various other embodiments, modifications, and equivalents thereof which may suggest themselves to those 25 skilled in the art without departing from the spirit of the present disclosure and/or scope of the appended claims.

Compounds of the present disclosure may be prepared by methods known in the art of organic synthesis. In all of the methods it is understood that protecting groups for sensitive or reactive groups may be employed where necessary in accordance with general principles of chemistry. Protecting groups are 30 manipulated according to standard methods of organic synthesis (T.W. Green and P.G.M. Wuts (1999) Protective Groups in Organic Synthesis, 3rd edition, John Wiley & Sons). These groups are removed at a convenient stage of the compound synthesis using methods that are readily apparent to those skilled in the art.

Analytical Methods, Materials, and Instrumentation

35 Unless otherwise noted, reagents and solvents were used as received from commercial suppliers.

Proton nuclear magnetic resonance (NMR) spectra were obtained on either Bruker Avance spectrometer or Varian Oxford 400 MHz spectrometer unless otherwise noted. Spectra are given in ppm (d) and coupling constants, J, are reported in Hertz. Tetramethylsilane (TMS) was used as an internal standard. Chemical shifts are reported in ppm relative to dimethyl sulfoxide (d 2.50), methanol (d 3.31), chloroform (d 7.26) or other solvent as indicated in NMR spectral data. A small amount of the dry sample (2-5 mg) is dissolved in an appropriate deuterated solvent (1 mL). The chemical names were generated using ChemBioDraw Ultra 5 v12 from CambridgeSoft.

Mass spectra (ESI-MS) were collected using a Waters System (Acquity UPLC and a Micromass ZQ mass spectrometer) or Agilent-1260 Infinity (6120 Quadrupole); all masses reported are the m/z of the protonated parent ions unless recorded otherwise. The sample was dissolved in a suitable solvent such as MeCN, DMSO, or MeOH and was injected directly into the column using an automated sample handler. 10 The analysis is performed on Waters Acquity UPLC system (Column: Waters Acquity UPLC BEH C18 1.7µm, 2.1 x 30mm; Flow rate: 1 mL/min; 55°C (column temperature); Solvent A: 0.05% formic acid in water, Solvent B: 0.04% formic acid in MeOH; gradient 95% Solvent A from 0 to 0.10 min; 95% Solvent A to 20% Solvent A from 0.10 to 0.50 min; 20% Solvent A to 5% Solvent A from 0.50 to 0.60 min; hold at 5% Solvent A from 0.6 min to 0.8 min; 5% Solvent A to 95% Solvent A from 0.80 to 0.90 min; and hold 15 95% Solvent A from 0.90 to 1.15 min.

Abbreviations used in the following examples and elsewhere herein are:

AC ₅₀ half maximal active concentration

AcOH Acetic acid

AIBN azobisisobutyronitrile

20 aq. Aqueous

BuLi n-butyllithium

br broad

d doublet

dd doublet of doublets

25 ddd doublet of doublet of doublets

ddq doublet of doublet of quartets

ddt doublet of doublet of triplets

dq doublet of quartets

dt doublet of triplets

30 dtd doublet of triplet of doublets

CDI carbonyldiimidazole

Cs ₂ CO ₃ cesium carbonate

DCE 1,2-dichloroethane

DCM dichloromethane

35 DIPEA N,N-Diisopropylethylamine

DMA N,N-dimethylacetamide

DMAP 4-dimethylaminopyridine DME 1,2-Dimethoxyethane

DMF N,N-dimethylformamide

DMP Dess-Martin periodinane or 1,1,1-Tris(acetyloxy)-1,1-dihydro-1,2- benziodoxol-3-(1H)-one

5 DMSO dimethylsulfoxide

EC ₅₀ half maximal effective concentration

EtOH ethanol

Et ₂ O diethyl ether

EtOAc ethyl acetate

10 HCl hydrogen chloride

hept heptet

HPLC high performance liquid chromatography

h or hr hour

HRMS high resolution mass spectrometry

15 g gram

IC ₅₀ half maximal inhibitory concentration

K ₂ CO ₃ potassium carbonate

KI potassium iodide

K ₃ PO ₄ tripotassium phosphate

20 LCMS liquid chromatography mass spectrometry

m multiplet

MeCN acetonitrile

MeOH methanol

mg milligram

25 MHz megahertz

min minutes

mL milliliter

mmol millimole

M molar

30 MS mass spectrometry

MsCl methanesulfonyl chloride

NaB(OAc) ₃ H sodium triacetoxyborohydride

NaHCO ₃ sodium bicarbonate

Na ₂ SO ₄ sodium sulfate

35 NBS N-bromosuccinimide

NiBr ₂ ^DME nickel (II) bromide ethylene glycol dimethyl ether complex NMI n-methylimidazole NMP N-Methyl-2-pyrrolidone

NMR Nuclear magnetic resonance

PdCl2(dppf)•DCM [1,1’-Bis(diphenylphosphino)ferrocene]dichloropalladium(II ), complex with dichloromethane

5 Pd/C palladium on carbon

q quartet

qd quartet of doublets

quint quintet

quintd quintet of doublets

10 rt room temperature

Rt retention time

s singlet

sat. saturated

t triplet

15 TEA or Et ₃ N triethylamine

td triplet of doublets

tdd triplet of doublet of doublets

THF tetrahydrofuran

TMP 2,2,6,6-tetramethylpiperidine

20 Ts tosyl

tt triplet of triplets

ttd triplet of triplet of doublets

TLC thin-layer chromatography

UPLC ultra-Performance Liquid Chromatography

25 XPhos Pd G2 chloro(2-dicyclohexylphosphino-2’,4’,6’-triisopropyl-1 ,1’-biphenyl)[2- (2’-amino-1,1’-biphenyl)]palladium(II)

v/v/v volume/volume/volume (volume ratio)

µW microwave

Example 1: 3-(4-fluoro-1-oxo-5-(piperidin-4-yl)isoindolin-2-yl)piperidi ne-2,6-dione HCl salt (INT- A)

Step 1.5-bromo-4-fluoro-3-hydroxyisobenzofuran-1(3H)-one (1-2):

5 To a stirred solution of TMP (57.0 mL, 57.0 mmol) in THF (40 mL) under an atmosphere of nitrogen was added BuLi (2.7 M in heptane, 20.3 mL, 54.7 mmol) dropwise at 0 °C and the resulting mixture was stirred for 30 min at 0 °C. The reaction mixture was then cooled to about -45 °C (using dry ice/MeCN bath) and 4-bromo-3-fluorobenzoic acid (4.99 g, 22.8 mmol), dissolved in THF (15 mL), was added dropwise and stirring was continued at -45 °C for 5 h. DMF (2.65 mL, 34.2 mmol) was then added 10 dropwise and the reaction mixture was allowed to warm to rt and stirred overnight. The reaction mixture was quenched with aq. 3M HCl (40 mL) at 0 °C and extracted with DCM (x3). The combined organic phases were dried over Na ₂ SO ₄ , filtered, and concentrated to dryness. The crude product was purified via silica gel chromatography eluting with 0 to 100% EtOAc in heptane to afford 1-2 (2.91 g, 11.40 mmol, 50% yield) as a pale brown solid. MS [M+H] ⁺ = 247.0. ¹ H NMR (400 MHz, Acetonitrile-d ₃ ) d 7.90 (dd, J = 8.0, 15 5.8 Hz, 1H), 7.56 (d, J = 8.0 Hz, 1H), 6.72 (s, 1H), 5.92 (br s, 1H).

Step 2.3-(5-bromo-4-fluoro-1-oxoisoindolin-2-yl)piperidine-2,6-di one (1-4):

To a stirred solution of 1-2 (2.90 g, 11.7 mmol) in DMF (20 mL) was added 3-aminopiperidine- 2,6-dione HCl salt (1-3, 2.90 g, 17.6 mmol) and NaB(OAc) ₃ H (6.22 g, 29.3 mmol) and the resulting mixture was stirred for 2 days at rt. The reaction mixture was diluted with H ₂ O (50 mL) and cooled to 0 °C with 20 water/ice bath which resulted in the formation of precipitate. The resulting mixture was filtered and the dark blue solid was washed with Et ₂ O (x3). The obtained solid was dried in a vacuum oven to afford 1-4 (1.89 g, 5.31 mmol, 45 % yield) as a grey solid. MS [M+H] ⁺ = 341.1. ¹ H NMR (400 MHz, DMSO-d ₆ ) d 11.02 (s, 1H), 7.88 (dd, J = 8.0, 6.0 Hz, 1H), 7.55 (d, J = 8.0 Hz, 1H), 5.12 (dd, J = 13.3, 5.1 Hz, 1H), 4.62 (d, J = 17.6 Hz, 1H), 4.45 (d, J = 17.6 Hz, 1H), 2.99– 2.85 (m, 1H), 2.66– 2.55 (m, 1H), 2.47– 2.36 (m, 25 1H), 2.05– 1.96 (m, 1H).

Step 3. tert-butyl 4-(2-(2,6-dioxopiperidin-3-yl)-4-fluoro-1-oxoisoindolin-5-yl )piperidine-1- carboxylate (1-6):

To a stirred suspension of NiBr ₂ • (DME) (13.57 mg, 0.044 mmol), picolinamide HCl salt (6.93 mg, 0.044 mmol), KI (438 mg, 2.64 mmol) and manganese powder (241 mg, 4.40 mmol) in DMA (1 mL) under an atmosphere of nitrogen were added 1-4 (300 mg, 0.879 mmol) and tert-butyl 4-iodopiperidine-1- carboxylate (1-5, 410 mg, 1.319 mmol), dissolved in DMA (2 mL). The resulting mixture was then stirred vigorously at 75 °C for 6 hours under an atmosphere of nitrogen. The reaction mixture was filtered and was washed with a minimal amount of MeCN. The obtained filtrate was concentrated to dryness. The crude 5 product was purified via silica gel chromatography eluting with 0 to 50% EtOAc:EtOH (v/v = 3:1) in DCM to afford 1-6 (117 mg, 0.191 mmol, 22% yield) as a white powder. MS [M-tBu+H] ⁺ = 390.3.

Step 4.3-(4-fluoro-1-oxo-5-(piperidin-4-yl)isoindolin-2-yl)piperi dine-2,6-dione HCl salt (INT-A):

To a stirred solution of 1-6 (117 mg, 0.192 mmol) in THF (3 mL) was added 4 M hydrogen chloride in dioxane (1.5 mL, 6.00 mmol) and the resulting mixture was stirred for 4 hours at 60 °C. Formation of a 10 precipitate was observed. The reaction mixture was diluted with Et2O (6 mL) and filtered. The precipitate was washed with Et ₂ O (x4) and then dried on a high vacuum to afford INT-A (64 mg, 0.16 mmol, 85% yield) was obtained as a white solid. MS [M+H] ⁺ = 346.1. ¹ H NMR (400 MHz, Deuterium Oxide) d 7.65 (d, J = 7.9 Hz, 1H), 7.55 (dd, J = 7.9, 6.2 Hz, 1H), 5.19 (dd, J = 13.3, 5.3 Hz, 1H), 4.69 (d, J = 17.6 Hz, 1H), 4.59 (d, J = 17.6 Hz, 1H), 3.61 - 3.54 (m, 2H), 3.38 (tt, J = 12.2, 3.8 Hz, 1H), 3.20 (td, J = 13.0, 3.2 15 Hz, 2H), 3.01 - 2.84 (m, 2H), 2.56 (qd, J = 12.9, 5.3 Hz, 1H), 2.33 - 2.25 (m, 1H), 2.18 - 2.11 (m, 2H), 2.10 - 1.97 (m, 2H).

Example 2: 3-(5-(1-benzylpiperidin-4-yl)-4-fluoro-1-oxoisoindolin-2-yl) piperidine-2,6-dione (I-3)

To a stirred solution of INT-A (60.0 mg, 0.157 mmol) in DMF (1 mL) were added NaB(OAc) ₃ H 20 (66.6 mg, 0.314 mmol) and benzaldehyde (2-1, 0.032 mL, 0.31 mmol) under an atmosphere of nitrogen.

The resulting mixture was stirred for 5 h at room temperature. The reaction mixture was concentrated to dryness and the crude product was purified via silica gel chromatography eluting with 0 to 100% EtOAc:EtOH:Et ₃ N (v/v/v= 75:25:1) in DCM to afford I-3 (25.5 mg, 0.058 mmol, 37% yield) as a white solid. MS [M+H] ⁺ = 436.3. ¹ H NMR (400 MHz, Methylene Chloride-d ₂ ) d 8.27 (s, 1H), 7.55 (d, J = 7.8 25 Hz, 1H), 7.43 - 7.38 (m, 1H), 7.34 - 7.28 (m, 4H), 7.27 - 7.21 (m, 1H), 5.11 (dd, J = 13.4, 5.2 Hz, 1H), 4.42 (d, J = 16.3 Hz, 1H), 4.35 (d, J = 16.3 Hz, 1H), 3.60 (s, 2H), 3.06 (d, J = 11.3 Hz, 2H), 2.98 - 2.87 (m, 1H), 2.86 - 2.75 (m, 2H), 2.33 (qd, J = 12.9, 5.7 Hz, 1H), 2.22 - 2.09 (m, 3H), 1.90 - 1.76 (m, 4H). Example 3: 3-(6-fluoro-1-oxo-5-(1-(pyridin-4-ylmethyl)piperidin-4-yl)is oindolin-2-yl)piperidine-2,6- dione (I-16).

Step 1. Methyl 4-bromo-2-(bromomethyl)-5-fluorobenzoate (3-2):

5 To a stirred solution of 4-bromo-5-fluoro-2-methylbenzoate (3-1, 2700 mg, 10.93 mmol) in DCE (25 mL) under an atmosphere of nitrogen was added NBS (2140 mg, 12.02 mmol) followed by AIBN (90 mg, 0.55 mmol), and the resulting mixture was stirred vigorously at 85 °C for 8 h. The reaction mixture was quenched with sat. aq. Na ₂ S ₂ O ₃ and then extracted with DCM (x3). The combined organic extracts were concentrated to dryness. The crude product was purified via silica gel chromatography eluting with 0 10 to 50% EtOAc in heptane to afford 3-2 (3.37 g, 9.30 mmol, 85% yield) as a colorless oil. ¹ H NMR (400 MHz, Chloroform-d) d 7.73 (d, J = 9.0 Hz, 1H), 7.69 (d, J = 6.5 Hz, 1H), 4.89 (s, 2H), 3.95 (s, 3H). Step 2.3-(5-bromo-6-fluoro-1-oxoisoindolin-2-yl)piperidine-2,6-di one (3-3):

To a solution of 3-2 (3.37 g, 9.30 mmol) in DMF (20 mL) was added 3-aminopiperidine-2,6-dione HCl salt (1-3, 2.30 g, 14.0 mmol), followed by DIPEA (8.10 mL, 46.5 mmol), and the resulting mixture 15 was stirred at 85 °C for 2 days. Excess DIPEA was removed by concentrating the mixture to a constant volume at 100 mbar, 40 °C. The reaction mixture was then poured into conical flask containing H ₂ O (80 mL). The precipitate that formed was filtered and washed with H ₂ O (x2) and Et ₂ O (x2). The obtained solid was dried in the vacuum oven for 5 hours to afford 3-3 (2.22 g, 6.51 mmol, 70% yield) as a dark grey solid. MS [M+H] ⁺ = 341.1 and 343.1 (Br isotopes). ¹ H NMR (400 MHz, DMSO-d ₆ ) d 11.01 (s, 1H), 8.05 (d, J = 20 6.0 Hz, 1H), 7.71 (d, J = 7.7 Hz, 1H), 5.12 (dd, J = 13.3, 5.1 Hz, 1H), 4.46 (d, J = 17.5 Hz, 1H), 4.33 (d, J = 17.5 Hz, 1H), 2.97 - 2.83 (m, 1H), 2.65 - 2.56 (m, 1H), 2.39 (qd, J = 13.2, 4.5 Hz, 1H), 2.09 - 1.94 (m, 1H).

Step 3. tert-butyl 4-(2-(2,6-dioxopiperidin-3-yl)-6-fluoro-1-oxoisoindolin-5-yl )piperidine-1- carboxylate (3-4):

5 To a stirred suspension of NiBr ₂ •(DME) (18 mg, 0.059 mmol), picolinamide HCl salt (9.2 mg, 0.059 mmol), KI (584 mg, 3.52 mmol) and manganese powder (322 mg, 5.86 mmol) in DMA (1 mL) under an atmosphere of nitrogen was added 3-3 (400 mg, 1.17 mmol) and tert-butyl 4-iodopiperidine-1- carboxylate (1-5, 547 mg, 1.76 mmol) dissolved in DMA (4 mL). The resulting mixture was stirred vigorously at 80 °C for 7.5 h under an atmosphere of nitrogen. The reaction was filtered and washed with 10 minimal amount of MeCN. The obtained filtrate was concentrated to a constant volume. The obtained dark brown solution was diluted with H ₂ O (40 mL) which caused formation of a brown precipitate. The solid was filtered, washed with H ₂ O (x2) and then heptane (x3) to afford crude 3-4 (390 mg) as a brown solid. The crude product was used in the next step without further purification. MS [M-H]- = 444.5.

Step 4.3-(6-fluoro-1-oxo-5-(piperidin-4-yl)isoindolin-2-yl)piperi dine-2,6-dione HCl salt (INT-B): 15 To a solution of crude 3-4 (390 mg) in THF (4 mL) was added 4 M hydrogen chloride in dioxane (2.0 mL, 8.0 mmol) and the resulting mixture was stirred for 1.5 hours a 60 °C. Formation of precipitate was observed. The reaction mixture was diluted with Et ₂ O (4 mL) and filtered. The precipitate was washed with Et ₂ O (x4) and then dried on a high vacuum to afford INT-B (301 mg, 0.631 mmol, 54% yield over 2 steps) as a grey solid. The obtained product was used in the next step without further purification. MS 20 [M+H] ⁺ = 346.2.

Step 5.3-(6-fluoro-1-oxo-5-(1-(pyridin-4-ylmethyl)piperidin-4-yl) isoindolin-2-yl)piperidine-2,6-dione (I-16)

To a solution of INT-B (100 mg, 0.21 mmol) in DMF (1 mL) was added NaB(OAc) ₃ H (89 mg, 0.42 mmol) and 4-pyridinecarboxaldehyde (3-5, 0.030 mL, 0.31 mmol). The resulting mixture was stirred 25 overnight at room temperature. The reaction mixture was concentrated to dryness. The crude product was purified via silica gel chromatography eluting with 0 to 100% EtOAc:EtOH:Et ₃ N (v/v/v = 75:25:1) in DCM to afford I-16 (35.7 mg, 0.082 mmol, 39% yield) as a pale yellow solid. MS [M+H] ⁺ = 437.3. ¹ H NMR (400 MHz, DMSO-d ₆ ) d 11.00 (s, 1H), 8.51 (d, J = 5.0 Hz, 2H), 7.63 (d, J = 6.3 Hz, 1H), 7.46 (d, J = 9.1 Hz, 1H), 7.35 (d, J = 5.0 Hz, 2H), 5.11 (dd, J = 13.4, 5.1 Hz, 1H), 4.42 (d, J = 17.1 Hz, 1H), 4.29 (d, J = 30 17.1 Hz, 1H), 3.55 (s, 2H), 2.97 - 2.82 (m, 4H), 2.59 (d, J = 17.2 Hz, 1H), 2.45 - 2.30 (m, 1H), 2.22 - 2.07 (m, 2H), 2.03 - 1.92 (m, 1H), 1.76 (s, 4H).

Example 4: 3-(2-(1-benzylpiperidin-4-yl)-5-oxo-5,7-dihydro-6H-pyrrolo[3 ,4-b]pyridin-6- yl)piperidine-2,6-dione (I-1)

Step 1. tert-butyl 4-(5-oxo-6,7-dihydro-5H-pyrrolo[3,4-b]pyridin-2-yl)piperidin e-1-carboxylate (4-3):

A suspension of 2-bromo-6,7-dihydro-pyrrolo[3,4-b]pyridin-5-one (4-1, 0.100 g, 0.469 mmol) and XPhos Pd cycle G2 (0.055 g, 0.070 mmol) in THF (2.3 mL) was placed under an atmosphere of nitrogen 5 by evacuating and backfilling the flask with nitrogen three times.0.5 M 1-(tert-butoxycarbonyl)piperidin- 4-yl)zinc(II) iodide (4-2) in THF (2.8 mL, 1.4 mmol) was added and the resulting mixture was stirred at 50 oC for 4 h. The reaction mixture was cooled to room temperature, quenched with saturated ammonium chloride, and extracted with ethyl acetate (x4). The combined organic extracts were passed through a phase separator and concentrated to dryness. The crude material was purified by silica gel chromatography eluting 10 with 0-100% ethyl acetate in heptane then 0-10% methanol in dichloromethane to afford 4-3 (85.2 mg, 0.268 mmol, 57% yield) as a yellow solid. MS [M-tBu+H] ⁺ = 262.2.

Step 2. Dimethyl 2-(2-(1-(tert-butoxycarbonyl)piperidin-4-yl)-5-oxo-5H-pyrrol o[3,4-b]pyridin- 6(7H)-yl)pentanedioate (4-5)

To a solution of dimethyl 2-bromopentanedioate (4-4, 0.128 g, 0.537 mmol) in NMP (2.7 mL) was 15 added tert-butyl 4-(5-oxo-6,7-dihydro-5H-pyrrolo[3,4-b]pyridin-2-yl)piperidin e-1-carboxylate (4-3, 0.0852 g, 0.268 mmol) and Cs ₂ CO ₃ (0.175 g, 0.537 mmol) and the resulting mixture was stirred at 100 ^o C for 16 h. The reaction mixture was cooled to room temperature, quenched with sat. aq. ammonium chloride, and extracted with ethyl acetate (x3). The combined organic extracts were washed with 1:1 saturated brine and water (x3), passed through a phase separator, and concentrated onto Celite®. The crude product was 20 purified by silica gel chromatography eluting with 0-100% ethyl acetate in heptane to afford 4-5 (52 mg, 0.11 mmol, 41 % yield) as a yellow oil. MS [M+H] ⁺ = 476.4. ¹ H NMR (400 MHz, Chloroform-d) d 8.07 (d, J = 7.9 Hz, 1H), 7.28 (d, J = 8.0 Hz, 1H), 5.14 (dd, J = 10.7, 4.8 Hz, 1H), 4.63 (d, J = 17.2 Hz, 1H), 4.40 (d, J = 17.2 Hz, 1H), 3.76 (s, 3H), 3.64 (s, 3H), 3.02 - 2.77 (m, 4H), 2.59 - 2.32 (m, 4H), 2.26 - 2.16 (m, 1H), 1.94 (d, J = 13.5 Hz, 2H), 1.79 (qd, J = 12.5, 4.3 Hz, 2H), 1.49 (s, 9H).

Step 3. Dimethyl 2-(5-oxo-2-(piperidin-4-yl)-5H-pyrrolo[3,4-b]pyridin-6(7H)-y l)pentanedioate 5 hydrochloride (4-6)

To a solution of dimethyl 2-(2-(1-(tert-butoxycarbonyl)piperidin-4-yl)-5-oxo-5H-pyrrol o[3,4- b]pyridin-6(7H)-yl)pentanedioate (4-5, 0.052 g, 0.11 mmol) in dioxane (1 mL) was added 4M HCl in dioxane (0.10 mL, 3.3 mmol). The resulting mixture was stirred at room temperature for 2 h, stirred at 40 oC for 2 h, and then stirred at room temperature for 16 h. The reaction mixture was concentrated to dryness 10 to afford product 4-6 as a yellow solid, which was carried onto the next step without purification. MS [M+H] ⁺ = 376.4.

Step 4. Dimethyl 2-(2-(1-benzylpiperidin-4-yl)-5-oxo-5H-pyrrolo[3,4-b]pyridin -6(7H)- yl)pentanedioate (4-7)

To a solution of dimethyl 2-(5-oxo-2-(piperidin-4-yl)-5H-pyrrolo[3,4-b]pyridin-6(7H)- 15 yl)pentanedioate (4-6, 40.9 mg, 0.109 mmol) in THF (1 mL) and DCM (1 mL) was added Et ₃ N (0.076 ml, 0.55 mmol). The resulting mixture was stirred at room temperature for 15 minutes and then benzyl bromide (0.016 mL, 0.13 mmol) was added. The reaction mixture was stirred at room temperature for 2 h, and then diluted with water and extracted with DCM (x3). The combined organic extracts were passed through a phase separator and concentrated to dryness. The crude material was purified by silica gel chromatography 20 (eluting with 0-100% EtOAc in heptane) to afford product 4-7 (36.3 mg, 0.078 mmol, 71.5 % yield) as a yellow oil, which was carried onto the next step without purification. MS [M+H] ⁺ = 466.5.

Step 5. 2-(2-(1-benzylpiperidin-4-yl)-5-oxo-5H-pyrrolo[3,4-b]pyridin -6(7H)-yl)pentanedioic acid (4- 8):

To a solution of dimethyl 2-(2-(1-benzylpiperidin-4-yl)-5-oxo-5H-pyrrolo[3,4-b]pyridin -6(7H)- 25 yl)pentanedioate (4-7, 0.036 g, 0.078 mmol) in THF (1 mL) was added 5M aq. NaOH (0.031 mL, 0.16 mmol) and the resulting mixture was stirred at room temperature for 1 h. Methanol was added (0.2 mL) and stirring was continued at room temperature for 30 minutes. The reaction mixture was quenched with 4M HCl in dioxane (0.041 mL, 0.16 mmol) and concentrated to dryness to afford product 4-8, as a yellow solid, which was carried onto the next step without purification. MS [M+H] ⁺ = 438.2.

30 Step 6. 3-(2-(1-benzylpiperidin-4-yl)-5-oxo-5H-pyrrolo[3,4-b]pyridin -6(7H)-yl)dihydro-2H-pyran- 2,6(3H)-dione (4-9):

2-(2-(1-benzylpiperidin-4-yl)-5-oxo-5H-pyrrolo[3,4-b]pyridin -6(7H)-yl)pentanedioic acid (4-8, 0.034 g, 0.078 mmol) was treated with acetyl chloride (1.0 mL, 14 mmol), DCE (1 mL), and triethylamine (0.023 mL, 0.16 mmol). The resulting mixture was stirred for 30 minutes at room temperature, and then 35 stirred at 80 ^o C for 30 minutes. The reaction mixture was cooled to room temperature and concentrated to dryness to afford product 4-9 as an orange solid, which was carried onto the next step without purification. MS [M+H] ⁺ = 420.4. Step 7.5-amino-4-(2-(1-benzylpiperidin-4-yl)-5-oxo-5H-pyrrolo[3,4 -b]pyridin-6(7H)-yl)-5- oxopentanoic acid and 5-amino-2-(2-(1-benzylpiperidin-4-yl)-5-oxo-5H-pyrrolo[3,4-b ]pyridin- 6(7H)-yl)-5-oxopentanoic acid (4-10 and 4-11)

A solution of 3-(2-(1-benzylpiperidin-4-yl)-5-oxo-5H-pyrrolo[3,4-b]pyridin -6(7H)-yl)dihydro- 5 2H-pyran-2,6(3H)-dione (4-9, 0.033 g, 0.078 mmol) in 7M NH ₃ in MeOH (1.50 mL, 10.5 mmol) was stirred at room temperature for 16 h. The resulting mixture was concentrated to dryness and then redissolved in DCM and sonicated for 10 minutes. The reaction mixture was concentrated to afford a mixture of regioisomers 4-10 and 4-11 as a light brown oil. MS [M+H] ⁺ = 437.4.

Step 8. 3-(2-(1-benzylpiperidin-4-yl)-5-oxo-5,7-dihydro-6H-pyrrolo[3 ,4-b]pyridin-6-yl)piperidine- 10 2,6-dione (I-1)

To a solution of 5-amino-4-(2-(1-benzylpiperidin-4-yl)-5-oxo-5H-pyrrolo[3,4-b ]pyridin-6(7H)- yl)-5-oxopentanoic acid and 5-amino-2-(2-(1-benzylpiperidin-4-yl)-5-oxo-5H-pyrrolo[3,4-b ]pyridin- 6(7H)-yl)-5-oxopentanoic acid (4-10 and 4-11, 34 mg, 0.078 mmol) in DMF (1 mL) was added DMAP (0.95 mg, 7.80 µmol), CDI (37.9 mg, 0.234 mmol), and DIPEA (0.041 ml, 0.234 mmol) and the reaction 15 mixture was stirred at room temperature for 4 h. An additional amount of CDI (14 mg, 0.086 mmol) and DIPEA (0.20 mL, 1.15 mmol) were added and stirring was continued at 100 ^o C for 16 h. CDI (0.014 g, 0.086 mmol) and DIPEA (0.082 mL, 0.47 mmol) were again added and the reaction was stirring was continued at 80 ^o C for 4 h. Additional CDI (0.014 g, 0.086 mmol) and DIPEA (0.082 mL, 0.47 mmol) were added and the resulting mixture was stirred at 100 ^o C for 16 h. The reaction mixture was cooled to room 20 temperature, filtered, and diluted with MeCN (3 mL). The crude material was purified by mass triggered acidic reverse phase HPLC (eluting with 5-20% MeCN in H ₂ O with 0.1% formic acid as modifier) to afford I-1, (3.9 mg, 9.3 µmol, 12 % yield) as a beige solid. MS [M+H] ⁺ = 419.4. ¹ H NMR (400 MHz, Acetonitrile- d ₃ ) d 8.07 (s, 1H), 7.90 (d, J = 8.0 Hz, 1H), 7.33 - 7.18 (m, 6H), 5.03 (dd, J = 13.4, 5.2 Hz, 1H), 4.29 (d, J = 17.2 Hz, 1H), 4.21 (d, J = 17.2 Hz, 1H), 3.57 (s, 2H), 2.98 (d, J = 11.5 Hz, 2H), 2.84 - 2.74 (m, 2H), 25 2.71 (dd, J = 13.2, 5.2 Hz, 1H), 2.68 - 2.60 (m, 2H), 2.33 (qd, J = 13.2, 4.9 Hz, 3H), 2.23 - 2.15 (m, 2H), 2.09 - 1.99 (m, 1H).

Example 5: 3-(5-(1-benzylpiperidin-4-yl)-4-methyl-1-oxoisoindolin-2-yl) piperidine-2,6-dione (I-5)

Step 1. tert-butyl 4-(4-methyl-1-oxo-1,3-dihydroisobenzofuran-5-yl)-3,6-dihydro pyridine-1(2H)- carboxylate (5-3)

To a microwave vial with a stir bar containing 5-bromo-4-methylisobenzofuran-1(3H)-one (5-1, 5 311.7 mg, 1.373 mmol), was added tert-butyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-3,6- dihydropyridine-1(2H)-carboxylate (5-2, 466.9 mg, 1.510 mmol), potassium carbonate (474 mg, 3.43 mmol), and Pd(dppf)Cl ₂ ^DCM (57 mg, 0.069 mmol) and then placed under an atmosphere of nitrogen. Dioxane (3 mL) and Water (0.33 mL) were then added and the reaction was sparged with nitrogen gas for 5 minutes. The reaction mixture was then placed in a microwave reactor and heated at 110 °C for 3 hours. 10 The resulting solution was filtered through Celite® and the pad was washed with ethyl acetate. The solution was then diluted with ethyl acetate (140 mL) and washed with water (30 mL), saturated sodium bicarbonate solution (30 mL), and brine (20 mL). The organic extract was then dried over magnesium sulfate, filtered, and concentrated to afford a crude material. The crude product was diluted with dichloromethane and purified by column chromatography (ISCO, 40 g SiO ₂ , eluting with Hexane/Ethyl acetate, 0-70% over 16 15 minutes) to afford 5-3 as a white solid (395 mg, 1.16 mmol, 85% yield). MS [M+H] ⁺ = 330.4. ¹ H NMR (400 MHz, Methylene Chloride-d ₂ ) d 7.66 (d, J = 7.8 Hz, 1H), 7.28 (d, J = 7.8 Hz, 1H), 5.63 (tt, J = 3.3, 1.6 Hz, 1H), 5.23 (s, 2H), 4.05 (q, J = 2.8 Hz, 2H), 3.63 (t, J = 5.6 Hz, 2H), 2.35 (ttd, J = 5.6, 2.7, 1.9 Hz, 2H), 2.24 (s, 3H), 1.48 (s, 9H).

Step 2. tert-butyl 4-(4-methyl-1-oxo-1,3-dihydroisobenzofuran-5-yl)piperidine-1 -carboxylate (5-4) In a reaction vial tert-butyl 4-(4-methyl-1-oxo-1,3-dihydroisobenzofuran-5-yl)-3,6- dihydropyridine-1(2H)-carboxylate (5-3, 395.3 mg, 1.200 mmol) was dissolved in EtOAc (6 mL) and EtOH (2 mL) containing a drop of acetic acid. Nitrogen gas was then bubbled through the solution for 10 minutes with a 16 gauge metal needle. Palladium on carbon (128.3 mg, 0.121 mmol) was then quickly added to the 5 reaction vial and resealed. The solution was bubbled with nitrogen gas again for 10 minutes. Hydrogen gas was bubbled through the solution for 10 minutes and the reaction vial was then placed under an atmosphere of hydrogen gas using a balloon. The reaction mixture was allowed to stir vigorously overnight. The balloon was replaced with a nitrogen line and nitrogen gas was bubbled through the reaction for 5 minutes. The solution was then opened to air and nitrogen was bubbled through the solution for an additional 10 minutes. 10 The reaction mixture was filtered through Celite®, the pad washed with ethyl acetate, and the filtrate concentrated to afford 5-4 as a white solid (391.4 mg, 1.075 mmol, 90% yield). MS [M-tBu+H] ⁺ = 276.3. 1H NMR (400 MHz, Methylene Chloride-d ₂ ) d 7.72 (d, J = 8.0 Hz, 1H), 7.43 (d, J = 8.0 Hz, 1H), 5.31 - 5.23 (m, 2H), 4.40 - 4.22 (m, 2H), 3.05 (tt, J = 11.9, 3.6 Hz, 1H), 2.87 (ddd, J = 13.3, 12.1, 2.8 Hz, 2H), 2.34 (s, 3H), 1.87 - 1.63 (m, 4H), 1.50 (s, 9H).

15 Step 3.4-methyl-5-(piperidin-4-yl)isobenzofuran-1(3H)-one trifluoroacetate (5-5)

To a reaction vial with a stir bar containing tert-butyl 4-(4-methyl-1-oxo-1,3- dihydroisobenzofuran-5-yl)piperidine-1-carboxylate (5-4, 391 mg, 1.18 mmol) dissolved in DCM (6 mL) was added TFA (0.5 mL, 6.5 mmol) and the resulting solution was allowed to stir overnight at room temperature. The reaction mixture was concentrated and azeotroped with methanol and dichloromethane to 20 afford the 5-5 as an off-white solid (473.8 mg, 1.372 mmol, quantitative). MS [M+H] ⁺ = 232.3. ¹ H NMR (400 MHz, DMSO-d ₆ ) d 7.71 (d, J = 7.9 Hz, 1H), 7.40 (d, J = 8.0 Hz, 1H), 5.39 (s, 2H), 3.49 - 3.35 (m, 2H), 3.25 (tt, J = 10.0, 4.7 Hz, 1H), 3.16 - 3.01 (m, 2H), 2.30 (s, 3H), 1.94 - 1.71 (m, 4H).

Step 4.5-(1-benzylpiperidin-4-yl)-4-methylisobenzofuran-1(3H)-one (5-7)

To a reaction vial with a stir bar containing 4-methyl-5-(piperidin-4-yl)isobenzofuran-1(3H)-one 25 (5-5, 408 mg, 1.18 mmol) and benzaldehyde (5-6, 0.24 mL, 2.4 mmol) dissolved in DCM (5 mL) was added in one portion sodium triacetoxyborohydride (626 mg, 2.95 mmol) and the resulting mixture was allowed to stir at room temperature open to air until the starting materials were consumed. The reaction solution was diluted with ethyl acetate (120 mL) and washed with 1:1 water/saturated sodium bicarbonate solution (30 mL) and brine (20 mL). The organic solution was then dried over magnesium sulfate, filtered, and 30 concentrated. The crude product was diluted with dichloromethane and purified by column chromatography (ISCO, 40 g SiO ₂ , eluting with Heptane/Ethyl acetate with 0.1% triethylamine modifier, 0-100% over 16 minutes) to afford the desired product 5-7 as a white solid (203.2 mg, 0.601 mmol, 51 % yield). MS [M+H] ⁺ = 322.3.

Step 5.4-(1-benzylpiperidin-4-yl)-2-(hydroxymethyl)-3-methylbenzo ic acid (5-8)

35 To a reaction vial with a stir bar containing 5-(1-benzylpiperidin-4-yl)-4-methylisobenzofuran- 1(3H)-one (5-7, 203.2 mg, 0.632 mmol) dissolved in THF (1 mL) was added sodium hydroxide (2 mL, 2 mmol) and the resulting mixture was allowed to stir at room temperature overnight. The solution was concentrated under reduced pressure and the crude material was diluted with water and acetonitrile and purified by mass-directed reversed phase column chromatography (Xbridge C18 OBD 5 um 30 x 50 mm column eluting with Water/Acetonitrile with 10mM NH4OH 75mL/min 1.5mL injection and a gradient of 10-30% MeCN over a 3.5 min period). The desired peaks were collected and concentrated by under reduced 5 pressure to afford the desired product 5-8 as a white solid (187.4 mg, 0.497 mmol, 79% yield). MS [M+H] ⁺ = 340.4. ¹ H NMR (400 MHz, DMSO-d ₆ ) d 7.40– 7.18 (m, 6H), 7.01 (d, J = 8.0 Hz, 1H), 4.41 (s, 2H), 3.50 (s, 2H), 2.91 (d, J = 11.2 Hz, 2H), 2.75– 2.64 (m, 1H), 2.24 (s, 3H), 2.07 (t, J = 12.8 Hz, 2H), 1.63 (dd, J = 8.1, 3.1 Hz, 4H).

Step 6.4-(1-benzylpiperidin-4-yl)-2-formyl-3-methylbenzoic acid (5-9)

10 A reaction vial with a stir bar containing 4-(1-benzylpiperidin-4-yl)-2-(hydroxymethyl)-3- methylbenzoic acid (5-8, 187.4 mg, 0.552 mmol) dissolved in MeCN (3 mL) was placed under an atmosphere of nitrogen and cooled to 0°C. DMP (351.4 mg, 0.828 mmol) was then added to the solution and the reaction mixture was allowed to slowly warm to room temperature and stir overnight. The solution was filtered through Celite® and the pad washed with acetonitile. The filtrate was then

15 concentrated. The crude material was diluted with water and acetonitrile and purified by mass-directed reversed phase column chromatography using (Xbridge C18 OBD 5um 30 x 50mm column eluting with Water/Acetonitrile with 10mM NH ₄ OH 75 mL/min 1.5mL injection and a gradient of 10-30% MeCN over a 3.5 min period). The desired peaks were collected and concentrated under reduced pressure to afford the desired product 5-9 as a pale yellow solid (13.3 mg, 0.038 mmol, 6.9% yield). MS [M+H] ⁺ = 20 338.3. ¹ H NMR (400 MHz, DMSO-d ₆ ) d 7.98 (d, J = 8.5 Hz, 1H), 7.66 - 7.47 (m, 2H), 7.42 - 7.17 (m, 5H), 6.66 (d, J = 8.4 Hz, 1H), 3.52 (s, 2H), 2.90 (d, J = 36.3 Hz, 2H), 2.36 (s, 3H), 2.18 - 2.08 (m, 2H), 1.84 - 1.59 (m, 4H).

Step 7.3-(5-(1-benzylpiperidin-4-yl)-4-methyl-1-oxoisoindolin-2-y l)piperidine-2,6-dione (I-5)

To a reaction vial with a stir bar containing 4-(1-benzylpiperidin-4-yl)-2-formyl-3-methylbenzoic 25 acid (5-9, 13.1 mg, 0.039 mmol) and 3-aminopiperidine-2,6-dione hydrochloride (1-3, 13.4 mg, 0.081 mmol) dissolved in DMF (0.6 mL) was added sodium triacetoxyborohydride (20.6 mg, 0.097 mmol) and the resulting mixture was allowed to stir at room temperature overnight and open to air. The reaction solution was then diluted with ethyl acetate and filtered through Celite®. The filtrate was washed multiple times with ethyl acetate and the combined organic extracts were then concentrated. The crude product was 30 diluted with dichloromethane and purified by column chromatography (ISCO, 12 g SiO2 Gold, eluting with Dichloromethane/(3:1) Ethyl acetate:Ethanol with 0.1% triethylamine modifier, 5-100% over 17 minutes) to afford the desired product I-5 as a white solid (7.8 mg, 0.018 mmol, 45% yield). MS [M+H] ⁺ = 432.4. 1H NMR (400 MHz, DMSO-d ₆ ) d 10.97 (s, 1H), 7.52 (d, J = 7.9 Hz, 1H), 7.41 (d, J = 8.0 Hz, 1H), 7.34 (d, J = 4.4 Hz, 4H), 7.28-7.23 (m, 1H), 5.11 (dd, J = 13.3, 5.1 Hz, 1H), 4.50 - 4.14 (m, 2H), 3.58-3.49 (m, 2H), 35 3.03 - 2.74 (m, 3H), 2.70 - 2.52 (m, 3H), 2.48 - 2.36 (m, 1H), 2.26 (s, 3H), 2.19-2.05 (m, 1H), 2.04– 1.94 (m, 1H), 1.75 - 1.64 (m, 4H). Example 6: 3-(6-(1-benzylpiperidin-4-yl)-3-oxo-1,3-dihydro-2H-pyrrolo[3 ,4-c]pyridin-2- yl)piperidine-2,6-dione (I-2)

Step 1: Methyl 4-(bromomethyl)-6-chloronicotinate (6-2)

5 To a solution of methyl 6-chloro-4-methylnicotinate (6-1, 0.50 g, 2.7 mmol) in dichloroethane (6.7 mL) was added NBS (0.527 g, 2.96 mmol) and AIBN (0.088 g, 0.539 mmol). A findenser was placed on top of the reaction mixture and it was stirred at 70 ^o C overnight. The reaction mixture was quenched with saturated sodium thiosulfate and extracted with dichloromethane (x3). The combined organic layers were passed through a phase separator and concentrated onto Celite®. The Celite® residue was purified by silica 10 gel chromatography using 0-50% ethyl acetate in heptane to afford crude product 6-2 (494 mg, 1.87 mmol, 69 % yield) as a white solid; MS [M+H] ⁺ = 263.8

Step 2: tert-butyl 5-amino-2-(6-chloro-3-oxo-1H-pyrrolo[3,4-c]pyridin-2(3H)-yl) -5-oxopentanoate, Methyl 6-chloro-4-methylnicotinate (6-4)

Methyl 4-(bromomethyl)-6-chloronicotinate (6-2, 0.494 g, 1.868 mmol) and tert-butyl 2,5- 15 diamino-5-oxopentanoate hydrochloride (6-3, 0.669 g, 2.80 mmol) were dissolved in DMF (2.3 mL) and DIPEA (1.63 mL, 9.34 mmol) was added. The resulting mixture was stirred at 80 ^o C for 12 h. The reaction was cooled to rt, quenched with water and extracted three times with dichloromethane. The combined organic extracts were passed through a phase separator and concentrated onto Celite®. The crude product on the Celite® residue was purified by silica gel chromatography eluting with 0-50% ethyl acetate in 20 heptane and 0-10% methanol in dichloromethane to afford product 6-4 (444 mg, 1.23 mmol, 67 % yield) as a yellow oil. MS [M-tBu+H] ⁺ = 298.1; ¹ H NMR (400 MHz, Chloroform-d) d 8.86 (d, J = 0.9 Hz, 1H), 7.50 (d, J = 0.9 Hz, 1H), 5.66 (s, 1H), 5.27 (s, 1H), 5.07 - 4.95 (m, 1H), 4.79 (d, J = 18.4 Hz, 1H), 4.52 (d, J = 18.4 Hz, 1H), 2.45 - 2.17 (m, 4H), 1.48 (s, 9H).

Step 3: 5-amino-2-(6-chloro-3-oxo-1H-pyrrolo[3,4-c]pyridin-2(3H)-yl) -5-oxopentanoic acid 25 hydrochloride (6-5)

To a solution of tert-butyl 5-amino-2-(6-chloro-3-oxo-1H-pyrrolo[3,4-c]pyridin-2(3H)-yl) -5- oxopentanoate (6-4, 0.153 g, 0.432 mmol) in dioxane (4.3 mL) was added 4M HCl in dioxane (0.43 mL, 1.7 mmol). The resulting mixture was stirred at room temperature for 72 h. The reaction mixture was then concentrated to dryness to afford product 6-5 as an orange solid, which was carried onto the next step without purification. MS [M+H] ⁺ = 298.1.

Step 4: 3-(6-chloro-3-oxo-1H-pyrrolo[3,4-c]pyridin-2(3H)-yl)piperidi ne-2,6-dione (6-6)

5 To a solution of 5-amino-2-(6-chloro-3-oxo-1H-pyrrolo[3,4-c]pyridin-2(3H)-yl) -5-oxopentanoic acid (6-5, 129 mg, 0.432 mmol) in DMF (4.3 mL) was added CDI (700 mg, 4.32 mmol) and DIPEA (1.5 mL, 8.6 mmol) and the resulting mixture was stirred at r.t. for 48 hrs. The reaction mixture was filtered through a syringe filter and concentrated to dryness. The crude material was purified by silica gel chromatography eluting with ethyl acetate and 10% triethylamine in ethyl acetate to afford product 6-6 (123 10 mg, 0.440 mmol, quantitative) as an orange oil. MS [M+H] ⁺ = 280.1.

Step 5: tert-butyl 4-(2-(2,6-dioxopiperidin-3-yl)-3-oxo-2,3-dihydro-1H-pyrrolo[ 3,4-c]pyridin-6- yl)piperidine-1-carboxylate (6-8)

3-(6-chloro-3-oxo-1H-pyrrolo[3,4-c]pyridin-2(3H)-yl)piperidi ne-2,6-dione (6-6, 0.073 g, 0.26 mmol) and XPhos Pd cycle G2 (0.031 g, 0.039 mmol) were suspended in THF (1.3 mL) and the resulting15 mixture was evacuated and backfilled with nitrogen three times.0.5M (1-(tert-butoxycarbonyl)piperidin- 4-yl)zinc(II) iodide (6-7) in THF (1.3 mL, 0.65 mmol) was added. The reaction mixture was stirred at 50 oC for 1 h. The reaction mixture was then cooled to room temperature, quenched with saturated ammonium chloride, and extracted four times with ethyl acetate. The combined organic extracts were passed through a phase separator and concentrated onto Celite®. The crude product on the Celite® residue was purified 20 with silica gel chromatography eluting with 0-100% ethyl acetate in heptane and then 0-10% methanol in DCM to afford 6-8 (31.2 mg, 0.073 mmol, 28 % yield) as a yellow solid. MS [M+H] ⁺ = 429.3

Step 6: 3-(3-oxo-6-(piperidin-4-yl)-1H-pyrrolo[3,4-c]pyridin-2(3H)-y l)piperidine-2,6-dione hydrochloride (6-9)

To a suspension of tert-butyl 4-(2-(2,6-dioxopiperidin-3-yl)-3-oxo-2,3-dihydro-1H-pyrrolo[ 3,4- 25 c]pyridin-6-yl)piperidine-1-carboxylate (6-8, 0.0312 g, 0.073 mmol) in dioxane (0.73 mL) was added 4M HCl in dioxane (0.1 mL, 0.4 mmol) and the resulting mixture was stirred at rt for 6 h. The reaction mixture was concentrated to dryness to afford product 6-9 as an orange oil, which was carried onto the next step without purification. MS [M+H] ⁺ = 329.0.

Step 7: 3-(6-(1-benzylpiperidin-4-yl)-3-oxo-1,3-dihydro-2H-pyrrolo[3 ,4-c]pyridin-2-yl)piperidine- 30 2,6-dione (I-2)

To a suspension of 3-(3-oxo-6-(piperidin-4-yl)-1H-pyrrolo[3,4-c]pyridin-2(3H)-y l)piperidine-2,6- dione hydrochloride (6-9, 24 mg, 0.073 mmol) in DMF (0.73 mL) was added triethylamine (51 µL, 0.37 mmol) and the resulting mixture was stirred at rt for 15 minutes. Benzyl bromide (10 µL, 0.088 mmol) was then added and the mixture was stirred at rt for 2 h. The reaction mixture was then concentrated and35 redissolved in DMF. Crude material was purified by mass triggered reverse phase HPLC (eluting with 5- 20% MeCN in water with 0.1% formic acid as modifier) to afford I-2 (6.31 mg, 0.013 mmol, 17 % yield) as a cream solid. MS [M+H] ⁺ = 419.3. ¹ H NMR (400 MHz, DMSO-d ₆ ) d 11.00 (s, 1H), 8.86 (d, J = 1.0 Hz, 1H), 7.59 (d, J = 1.1 Hz, 1H), 7.35 - 7.21 (m, 5H), 5.12 (dd, J = 13.3, 5.1 Hz, 1H), 4.51 (d, J = 18.3 Hz, 1H), 4.36 (d, J = 18.3 Hz, 1H), 3.51 (s, 2H), 2.96 - 2.90 (m, 2H), 2.88 - 2.77 (m, 2H), 2.63 - 2.54 (m, 1H), 2.45 - 2.36 (m, 1H), 2.09 (td, J = 11.2, 3.4 Hz, 2H), 2.04 - 1.95 (m, 1H), 1.86 - 1.77 (m, 4H).

Example 7: 3-(4-fluoro-5-(1-(((1r,4r)-4-methoxycyclohexyl)methyl)piperi din-4-yl)-1-oxoisoindolin-2- 5 yl)piperidine-2,6-dione HCOOH salt (I-18)

Aldehyde 7-1 was made according to the procedure described in WO2019/038717. (1r,4r)-4-methoxycyclohexane-1-carbaldehyde 7-1 (67 mg, 0.47 mmol) and INT-A (90 mg, 0.24 mmol) were dissolved in DMF (1.6 mL) and stirred at room temperature for 15 minutes. NaBH(OAc) ₃ 10 (100 mg, 0.471 mmol) was added and the reaction mixture was stirred for 2 h at room temperature. The reaction was quenched with 50% saturated aqueous sodium bicarbonate. The aqueous layer was extracted three times with 4:1 dichloromethane:isopropanol. The organic layers were combined, passed through a phase separator and concentrated onto Celite ^® . The crude material was purified by silica gel chromatography eluting with 0-100% EtOAc:EtOH:TEA (v/v/v = 3:1:0.04) in heptane. Fractions 15 containing product were concentrated and further purified by RP HPLC (5-20% ACN in water with 0.1% formic acid as modifier; Waters XBridge C18 OBD 30 x 50 mm). Fractions containing desired product were concentrated to afford the HCOOH salt of I-18 (8.8 mg, 0.014 mmol, 6% yield) as a white solid. MS [M+H] ⁺ = 472.3. ¹ H NMR (400 MHz, CDCl3) d 8.13 (s, 1H), 7.71 (d, J = 7.8 Hz, 1H), 7.46 (t, J = 7.1 Hz, 1H), 5.24 (dd, J = 13.1, 5.1 Hz, 1H), 4.55 (d, J = 16.1 Hz, 1H), 4.40 (d, J = 16.1 Hz, 1H), 3.78 (d, J = 11.2 20 Hz, 2H), 3.37 (s, 3H), 3.24 - 3.08 (m, 2H), 3.00 - 2.71 (m, 6H), 2.49 - 2.35 (m, 3H), 2.30 - 2.21 (m, 1H), 2.18 - 2.11 (m, 2H), 2.05 - 1.93 (m, 4H), 1.85 - 1.77 (m, 1H), 1.29 - 1.10 (m, 4H).

Example 8: 3-(4-chloro-5-(1-(((1r,4r)-4-methoxycyclohexyl)methyl)piperi din-4-yl)-1-oxoisoindolin- 2-yl)piperidine-2,6-dione (I-17)

Step 1. ((1R,4R)-4-Methoxycyclohexyl)methanol (8-2)

5 To a solution of trans-4-methoxycyclohexane-1-carboxylic acid (8-1, 1.00 g, 6.32 mmol) in dry THF (10 mL), under an atmosphere of nitrogen and cooled using an ice bath, was added lithium aluminum hydride 1M in THF (9.5 mL, 9.5 mmol) dropwise. The resulting mixture was stirred using an ice bath for 2 h, then allowed to warm to room temperature and stirred for 16 h. A solution of saturated aqueous potassium sodium tartrate (Rochelle’s Salt) (150 mL) was then added with stirring. The reaction mixture 10 was extracted with DCM (x4) and the combined organic phases were passed through a phase separating column and concentrated to dryness to afford 8-2 (903 mg, 6.26 mmol, 99% yield) as a colorless oil. The product was carried onto the next step without purification. ¹ H NMR (400 MHz, DMSO-d ₆ ) d 4.36 (s, 1H), 3.21 (s, 3H), 3.19 (d, J = 6.3 Hz, 2H), 3.02 (tt, J = 10.7, 4.1 Hz, 1H), 2.07-1.91 (m, 2H), 1.80-1.66 (m, 2H), 1.36-1.21 (m, 1H), 1.11-0.96 (m, 2H), 0.87 (tdd, J = 13.2, 11.6, 3.1 Hz, 2H).

15 Step 2. ((1r,4r)-4-methoxycyclohexyl)methyl methanesulfonate (8-3)

To a solution of 8-2 (220 mg, 1.53 mmol), DIPEA (0.53 mL, 3.1 mmol), 1-methyl-1H-imidazole (0.24 mL, 3.0 mmol) in DCM (3 mL) was added methanesulfonyl chloride (0.18 mL, 2.3 mmol) dropwise under a stream of nitrogen. The reaction mixture was stirred at rt overnight. The reaction mixture was diluted with DCM (30 mL total). Organics were washed with 1M aq. HCl (x3), followed by a sat. aq. 20 solution of NaHCO ₃ (x2) and brine (x1). Organics were passed through a phase separating column, solvent collected and evaporated off to afford 8-3 (329 mg, 1.48 mmol, 97% yield) as a colorless oil. ¹ H NMR (400MHz, DMSO-d ₆ ): d 4.01 (d, J = 6.4 Hz, 2H), 3.22 (s, 3H), 3.15 (s, 3H), 3.10 - 2.99 (m, 1H), 2.05 - 1.95 (m, 2H), 1.81 - 1.70 (m, 2H), 1.69-1.57 (m, 1H), 1.16 - 0.94 (m, 4H).

Step 3.5-bromo-4-chloro-3-hydroxyisobenzofuran-1(3H)-one (8-5):

To a solution of 4-bromo-3-chlorobenzoic acid (8-4, 1000 mg, 4.25 mmol) in THF (15 mL) under 5 an atmosphereof nitrogen was added TMPMgCl•LiCl (8-4a, 1M in THF/PhMe, 9.3 mL, 9.3 mmol) dropwise at 0 °C. The reaction mixture was stirred for 1.5 h at 0 °C. DMF (0.50 mL, 6.4 mmol) was then added dropwise and the reaction mixture was allowed to reach rt and stirred for additional 2 h. The reaction mixture was quenched with 1 M aq. HCl (20 mL) at 0 °C and extracted with DCM (x3). The combined organic phases were concentrated to dryness. The crude product was purified by silica gel chromatography 10 eluting with 0 to 40% EtOAc in heptane to afford 8-5 (611 mg, 2.32 mmol, 55 % yield) as a white solid.

MS [M+H] ⁺ = 263.0. ¹ H NMR (400 MHz, Methylene Chloride-d ₂ ) d 7.89 (d, J = 8.0 Hz, 1H), 7.62 (d, J = 8.0 Hz, 1H), 6.64 (s, 1H), 4.05 (s, 1H).

Step 4.3-(5-bromo-4-chloro-1-oxoisoindolin-2-yl)piperidine-2,6-di one (8-6):

To a solution of 8-5 (611 mg, 2.32 mmol) and 3-aminopiperidine-2,6-dione HCl (1-3, 573 mg, 15 3.48 mmol) in DMF (5 mL) was added NaBH(OAc) ₃ (1229 mg, 5.80 mmol) and the reaction mixture was stirred overnight at rt. The reaction mixture was poured into a conical flask containing cold H ₂ O (30 mL). The reaction mixture was filtered and the solid was washed with minimal amount of cold H ₂ O and then Et ₂ O to afford 8-6 (362 mg, 0.998 mmol, 43% yield) as a grey solid. MS [M+H] ⁺ = 357.1. ¹ H NMR (400 MHz, DMSO-d ₆ ) d 11.02 (s, 1H), 7.95 (d, J = 8.0 Hz, 1H), 7.65 (d, J = 8.1 Hz, 1H), 5.14 (dd, J = 13.3, 5.1 20 Hz, 1H), 4.54 (d, J = 17.9 Hz, 1H), 4.37 (d, J = 17.9 Hz, 1H), 3.02 - 2.84 (m, 1H), 2.66 - 2.55 (m, 1H), 2.48 - 2.37 (m, 1H), 2.06 - 1.97 (m, 1H).

Step 5. tert-butyl 4-(4-chloro-2-(2,6-dioxopiperidin-3-yl)-1-oxoisoindolin-5-yl )piperidine-1- carboxylate (8-7):

To a stirred suspension of NiBr ₂ • (DME) (16 mg, 0.051 mmol), picolinimidamide HCl salt (8.0 25 mg, 0.051 mmol), KI (504 mg, 3.04 mmol) and manganese powder (278 mg, 5.06 mmol) under an atmosphere of nitrogen in DMA (1 mL) was added 8-6 (362 mg, 1.01 mmol) and tert-butyl 4- iodopiperidine-1-carboxylate (1-5, 473 mg, 1.52 mmol), dissolved in DMA (3 mL). The resulting mixture was then stirred vigorously at 75 °C for 24 hours under an atmosphere of nitrogen. The reaction mixture was filtered and filter was washed with minimal amount of MeCN. The obtained filtrate was concentrated 30 (100 mbar, 40 °C) to a constant volume. Cold H2O (20 mL) was added and formed brown precipitate was filtered, washed with H ₂ O, heptane, and dried in the vacuum oven. Obtained crude product 8-7 (359 mg) was used in the next step without further purification. MS [M+H] ⁺ = 462.3.

Step 6.3-(4-chloro-1-oxo-5-(piperidin-4-yl)isoindolin-2-yl)piperi dine-2,6-dione HCl salt (8-8):

To a stirred solution of crude 8-7 (359 mg) in THF (3 mL) was added 4 M hydrogen chloride in 35 dioxane (1.5 mL, 6.0 mmol) and the reaction mixture was stirred for 24 hours a 60 °C. The reaction mixture was diluted with Et ₂ O and filtered. The precipitate was washed with Et ₂ O (x4) and then dried on a high vac to afford crude 8-8 (103 mg) as a white solid. Obtained crude product was used in the next step without further purification. MS [M+H] ⁺ = 362.3.

Step 7. 3-(4-chloro-5-(1-(((1r,4r)-4-methoxycyclohexyl)methyl)piperi din-4-yl)-1-oxoisoindolin-2- yl)piperidine-2,6-dione (I-17):

5 To a solution of crude 8-8 (103 mg), DIPEA (0.17 mL, 0.95 mmol) in DMF (1 mL) was added 8- 3 (54.5 mg, 0.245 mmol) in one portion and the reaction mixture was stirred overnight at at room temperature. The reaction mixture was concentrated to dryness. Crude product was purified by silica gel chromatography eluting with 0 to 100% EtOAc:EtOH:Et ₃ N (v/v/v = 75:25:1) in DCM to afford I-17 (3.2 mg, 6.5 µmol, 0.6% yield over 3 steps) as a white powder. MS [M+H] ⁺ = 488.4. ¹ H NMR (400 MHz, 10 DMSO-d6) d 11.00 (s, 1H), 7.69 (d, J = 7.9 Hz, 1H), 7.58 (d, J = 7.9 Hz, 1H), 5.12 (dd, J = 13.3, 5.1 Hz, 1H), 4.47 (d, J = 17.6 Hz, 1H), 4.30 (d, J = 17.6 Hz, 1H), 3.23 (s, 3H), 3.08 - 2.84 (m, 5H), 2.68 - 2.56 (m, 1H), 2.23 - 1.89 (m, 6H), 1.84– 1.63 (m, 6H), 1.48 (s, 1H), 1.09 (q, J = 12.1 Hz, 2H), 0.94 - 0.78 (m, 2H). Missing protons are overlapping with residual DMSO or H ₂ O solvent peaks.

Example 9: 3-(5-(1-benzyl-1,2,3,6-tetrahydropyridin-4-yl)-4-methoxy-1-o xoisoindolin-2- 15 yl)piperidine-2,6-dione (I-20)

Step 1: 5-bromo-3-hydroxy-4-methoxyisobenzofuran-1(3H)-one (9-2)

In a 200 mL round bottomed flask with stir bar, 2,2,6,6-tetramethylpiperidine (TMP, 4.00 mL, 23.7 mmol) was dissolved in THF (18 mL) and placed under nitrogen atmosphere. The solution was cooled to 20 0°C and n-butyllithium in hexanes (9 mL, 22.5 mmol) was added dropwise. The solution was then allowed to stir at 0°C for 30 minutes. Separately, 4-bromo-3-methoxybenzoic acid (9-1, 2.16 g, 9.33 mmol) was dissolved in THF (6 mL). The lithium 2,2,6,6-tetramethylpiperidine solution was then cooled to -45°C (using a dry ice/acetonitrile bath) and the benzoic acid solution was added dropwise. The resulting mixture was stirred at -45°C for 4 hours. DMF (1.10 mL, 14.2 mmol) was then added and the reaction mixture was allowed to warm to room temperature and stirred overnight. The solution was then cooled to 0°C, quenched with 3 M HCl (20 mL), and extracted with dichloromethane (3 x 60 mL). The organic phase was washed with 0.1 M HCl (2 x 20 mL) and brine (20 mL), dried over magnesium sulfate, filtered, and concentrated to afford a crude product as an orange solid. The crude product was diluted with dichloromethane and 5 purified by column chromatography (ISCO, 80 g SiO ₂ , eluting with Heptane/Ethyl acetate, 0-80% over 20 minutes) to afford the product contaminated with impurities. The product was repurified by column chromatography (ISCO, 40 g SiO ₂ , eluting with Heptane/Ethyl acetate, 0-60% over 15 minutes) to afford the desired product 9-2 as a light orange solid (54.2 mg, 0.084 mmol, 0.90% yield): MS [M+H] ⁺ = 259.0. 1H NMR (400 MHz, DMSO-d ₆ ) d 8.33 (d, J = 8.5 Hz, 1H), 7.90 (d, J = 7.9 Hz, 1H), 7.42 (d, J = 7.9 Hz, 10 1H), 6.95 (d, J = 8.1 Hz, 1H), 4.09 (s, 3H).

Step 2: 3-(5-bromo-4-methoxy-1-oxoisoindolin-2-yl)piperidine-2,6-dio ne (9-3)

In a reaction vial with stir bar, 5-bromo-3-hydroxy-4-methoxyisobenzofuran-1(3H)-one (9-2, 54.2 mg, 0.209 mmol) and 3-aminopiperidine-2,6-dione hydrochloride (1-3, 54.7 mg, 0.332 mmol) were dissolved in DMF (1 mL). Sodium triacetoxyborohydride (111 mg, 0.523 mmol) was added to the solution 15 and the resulting mixture was allowed to stir at room temperature open to the air overnight. The reaction mixture was diluted with ethyl acetate and filtered through Celite®. The filtrate was washed multiple times with ethyl acetate and the organic phase was then concentrated. The crude material was diluted with water and acetonitrile and purified by mass-directed reverse phase column (eluting with 15-40% ACN in water with 0.1% formic acid as modifier; Waters XBridge C18 OBD 30 x 50 mm). The desired peaks were 20 collected and concentrated by vacuum to afford the desired product 9-3 as a white solid (16.2 mg, 0.046 mmol, 21.9 % yield): ¹ H NMR (400 MHz, DMSO-d ₆ ) d 11.02 (s, 1H), 7.77 (d, J = 8.0 Hz, 1H), 7.36 (d, J = 7.9 Hz, 1H), 5.12 (dd, J = 13.3, 5.1 Hz, 1H), 4.87 - 4.42 (m, 2H), 4.00 (s, 3H), 3.00 - 2.85 (m, 1H), 2.61 (d, J = 17.7 Hz, 1H), 2.46 - 2.42 (m, 1H), 2.02 (ddd, J = 10.4, 5.4, 3.1 Hz, 1H)

Step 3: tert-butyl 4-(2-(2,6-dioxopiperidin-3-yl)-4-methoxy-1-oxoisoindolin-5-y l)-3,6- 25 dihydropyridine-1(2H)-carboxylate (9-5)

A microwave vial with stir bar was charged with 3-(5-bromo-4-methoxy-1-oxoisoindolin-2- yl)piperidine-2,6-dione (9-3, 16 mg, 0.046 mmol), tert-butyl 4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2- yl)-3,6-dihydropyridine-1(2H)-carboxylate (9-4, 17.0 mg, 0.055 mmol), potassium carbonate (16.5 mg, 0.119 mmol), and Pd(dppf)Cl ₂ ^ DCM (3.75 mg, 4.59 µmol) and then placed under an atmosphere of 30 nitrogen. Dioxane (0.45 mL) and water (0.05 mL) were then added and the reaction mixture was sparged with nitrogen gas for 5 minutes. The resulting mixture was then placed in a microwave reactor and heated at 110 °C for 2 hours. The reaction mixture was filtered through Celite® and washed with ethyl acetate. The filtrate was then diluted with ethyl acetate (150 mL) and the organic phase was washed with water (30 mL), saturated sodium bicarbonate solution (30 mL), and brine (20 mL). The organic phase was then dried 35 over magnesium sulfate, filtered, and concentrated to afford the crude product 9-5, which was taken onto the next step without purification. Step 4: 3-(4-methoxy-1-oxo-5-(1,2,3,6-tetrahydropyridin-4-yl)isoindo lin-2-yl)piperidine-2,6-dione (9- 6)

In a reaction vial with stir bar, tert-butyl 4-(2-(2,6-dioxopiperidin-3-yl)-4-methoxy-1- oxoisoindolin-5-yl)-3,6-dihydropyridine-1(2H)-carboxylate (9-5, 20.1 mg, 0.044 mmol) was dissolved in 5 DCM (1 mL). TFA (0.03 mL, 0.4 mmol) was added and the resulting mixture was allowed to stir overnight at room temperature. Incomplete conversion to the desired product observed after 16 hours. Additional TFA (0.03 mL) was added and stirring was continued overnight at room temperature. The reaction mixture was concentrated to afford the crude product, which was then azeotroped with methanol and dichloromethane to afford the crude product 9-6 as a brown, viscous liquid. The product was taken forward to the next step 10 onto the next step without purification. MS [M+H] ⁺ = 356.3.

Step 5: 3-(5-(1-benzyl-1,2,3,6-tetrahydropyridin-4-yl)-4-methoxy-1-o xoisoindolin-2-yl)piperidine- 2,6-dione (I-20)

In a reaction vial with stir bar, 3-(4-methoxy-1-oxo-5-(1,2,3,6-tetrahydropyridin-4-yl)isoindo lin-2- yl)piperidine-2,6-dione (9-6, 17.7 mg, 0.044 mmol) and benzaldehyde (0.02 mL, 0.2 mmol) were dissolved 15 in DMF (0.5 mL). Sodium triacetoxyborohydride (65.0 mg, 0.307 mmol) was added in one portion and the resulting mixture was allowed to stir at room temperature open to air until complete consumption of starting material was observed. The reaction mixture was then filtered through Celite® and washed with ethyl acetate. The filtrate was then concentrated under reduced pressure. The crude product was dissolved with acetonitrile and purified by reverse-phase column chromatography (eluting with 10-30% ACN in water 20 with 0.1% formic acid as modifier; Waters XBridge C18 OBD 30 x 50 mm). The desired peaks were collected and concentrated under reduced pressure. The obtained product was diluted with dichloromethane and purified by column chromatography (ISCO, 4 g SiO ₂ , eluting with dichloromethane/Isopropanol, 0- 100% over 12 minutes) to afford I-20 as a white solid (2.9 mg, 6.4 µmol, 14% yield): MS [M+H] ⁺ = 446.4. 1H NMR (400 MHz, DMSO-d ₆ ) d 10.99 (s, 1H), 7.45 - 7.19 (m, 7H), 5.93 - 5.81 (m, 1H), 5.10 (dd, J = 25 13.3, 5.1 Hz, 1H), 4.68 - 4.35 (m, 2H), 3.84 (s, 3H), 3.61 (s, 2H), 3.08 (q, J = 2.9 Hz, 2H), 2.92 (ddd, J = 18.0, 13.5, 5.3 Hz, 1H), 2.64 (d, J = 5.6 Hz, 2H), 1.99 (dd, J = 9.5, 4.4 Hz, 1H). Missing protons are overlapping with DMSO solvent peak.

Biological Assays and Data

The activity of a compound according to the present disclosure can be assessed by the following in 30 vitro methods.

Example 10: Prolabel Quantification of IKZF1, IKZF2 or GSPT1 protein levels in 293GT cells The Prolabel system from DiscoverX was used to develop high-throughput and quantitative assays to measure changes in IKZF1, IKZF2 and GSPT1 protein levels in response to compounds. The prolabel tag was derived from the alpha fragment of beta galactosidase and has the following protein sequence:35 mssnslavvlqrrdwenpgvtqlnrlaahppfaswrnseeartdrpsqqlrslnge. The complementary fragment of beta- galactosidase (from DiscoverX), is added to the prolabel tag to form an active beta galactosidase enzyme whose activity can be precisely measured. In this way, the levels of a fusion protein with the prolabel tag can be quantified in cell lysates.

Lentiviral vectors, based on the Invitrogen pLenti6.2/V5 DEST backbone, were constructed that placed the prolabel tag upstream of IKZF1, IKZF2 or GSPT1 and expressed the fusion protein from a CMV 5 promoter.

To ensure moderate and consistent expression of the prolabel fusion proteins across all cells in the population, stable cell lines were constructed from cells expressing a single copy of the construct. Lentivirus packaged with the constructs was made using the Virapower kit from Invitrogen. Strongly adherent 293GT cell, GripTite 293 MSR cells from Thermo Fisher Scientific (Catalog number: R79507), were infected with 10 the virus at low multiplicity of infection and selected by 5 mg/mL blasticidin for 2 weeks.

The levels of prolabel tagged fusion proteins in compound treated cell lines were measured as follows:

Day 1, Cells were diluted to 1.0 x 10 ⁶ cells/ml in normal growth medium.17.5 mL of cells were plated in each well of a solid white 384 well plate. Plates were incubated overnight in a 37 ^C tissue culture 15 incubator.

Day 2, Serial dilutions of compounds were made in 384 well plates from 10 mM stocks.15 mL of DMSO was added to each well of a 384 well plate. In the first column, 15µL of stock compound was added. The solution was mixed and 15 µL was transferred to the next column. This was repeated until 20 two-fold dilutions were prepared.2.5 mL of diluted compounds were transferred into 60 mL of cell culture medium 20 in another 384 well plate, and mixed well.2.5 mL of this mixture was added to the plated cells. The final DMSO concentration was 0.5% and the highest concentration of compound was 50 mM. Plates were incubated overnight (e.g., about 14 h, 18 h, or 24 h) in a 37 ^C tissue culture incubator.

Day 3, Plates were removed from the incubator and allowed to equilibrate at rt for 30 minutes. Prolabel substrate (DiscoverX PathHunter Prolabel Detection Kit, User manual: 93-0180) was added as 25 described by the manufacturers protocols. Plates were incubated at rt for three hours and luminescence was read using an Envision reader (Perkin Elmer) Data was analyzed and visualized using the Spotfire software package.

Table 14 shows Helios (IKZF2) and Ikaros (IKZF1) degradation activity of compounds of the disclosure in Pro-label assays in 293GT cells, (% degradation is at 10 µM). Pomalidomide was tested as 30 the control.

TABLE 14: Example 8: Quantification of in vitro Suppressive Potency of Primary Human Regulatory T cells Expanded in the Presence of Compounds

Materials and methods

Treg cell sorting:

5 Human buffy coats are obtained from BioreclamationIVT, in the USA. CD4+ T cells are isolated from said buffy coats using the RosetteSep Human CD4+ T cell enrichment Cocktail (Stemcell technologies, USA) and gradient centrifugation over Ficoll Paque Plus (GE HealthCare LifeSciences, USA) as per manufacturer’s recommendations. Cells are resuspended in RPMI medium supplemented with 1% penicillin-Streptomycin solution, 10% Fetal Bovine Serum, HEPES (10 mM), MEM NEAA (100 nM), 10 sodium pyruvate (1 mM) (all supplements from Thermo Fisher Scientific, USA), thereafter referred to as complete RPMI (cRPMI), and rested overnight at 37 °C, 5% CO ₂ in the presence of 2U/mL rhIL-2 (Proleukin, Novartis). Cells are collected and resuspended in autoMACS Running Buffer supplemented with BSA (Miltenyi Biotec, USA) and labelled using CD4-FITC antibody (clone RPA-T4), CD25-APC antibody (clone M-A251) (Biolegend) and CD25 Microbeads (Miltenyi Biotec, USA). CD25-enriched cells 15 are then isolated using the autoMACS Pro Separator. A highly purified population of Treg cells is then obtained by further sorting CD4+ CD25Hi cells using a Sony SH800 cell sorter. The resulting Treg cell population is routinely above 90% pure according to FOXP3 expression.

Treg cell expansion:

Purified Treg cells are plated in cRPMI in 96-well, round-bottom plates at a density of 25000- 20 50000 cells per well and activated in the presence of 500 U/mL rhIL2, and Treg expander Dynabeads (Thermo Fisher Scientific, USA) according to manufacturer’s recommendations, in the presence or absence of 100 µM rapamycin (Thermo Fisher Scientific, USA). The compounds of the present disclosure are then added at a final concentration of 10 ^M and DMSO was added as a vehicle control. Cells are incubated at 37 °C, 5% CO ₂ for a total of 12-14 days. The compound and rhIL2 are replenished every 48h during the 25 entirety of the culture.

Phenotypic analysis of expanded Treg cells:

Cell are collected and counted and the fold expansion is calculated as (number of cells recovered)/(number of cells plated). A fraction of the cells is fixed and permeabilized using the eBioscience Foxp3 staining Buffer kit (eBioscience, Thermo Fisher Scientific, USA) and stained with Helios- 30 PECyanine7 antibody (Clone 22F6). To determine IL2-expression, expanded Treg cells are further incubated in the presence of the eBioscience Cell Stimulation Cocktail with Protein inhibitors (Thermo Fisher Scientific) for 4 hours, followed by fixation and staining with IL2-BV711 antibody (clone MQ1- 17H12) (Biolegend, USA). Cells are acquired on an LSRFortessa (Becton Dickinson, USA) and analysis was performed using the FlowJo software (TreeStar, USA).

35 Functional analysis of expanded Treg cells:

Primary human PBMCs are obtained from freshly prepared buffy coats (BioReclamationIVT) using gradient centrifugation over Ficoll Paque Plus as per manufacturer’s recommendations. Cells are then labelled with CFSE (5(6)-Carboxyfluorescein diacetate N-succinimidyl ester, Sigma-Aldrich, USA) and plated in triplicates cRPMI in round bottom 96-well plates, alone or with expanded Treg cells at a 1:2 PBMC:Treg ratio. The compounds of the present disclosure are then added at a final concentration of 10 ^M and DMSO is added as a vehicle control. Cells are activated using soluble anti-CD3 antibody (clone 5 OKT3) (eBioscience, ThermoFisher Scientific, USA) at a final concentration of 100 ng/ml. Cells are incubated at 37 °C, 5% CO ₂ for a total of 4-5 days. At the end of the culture, cells are stained using the Live/dead Blue viability stain (Thermo Fisher Scientific, USA) as per manufacturer’s instructions, followed by staining with CD4-BUV737 (Clone SK3) (BDBiosciences, USA) and CD8-BV711 (clone RPA-T8) (Biolegend, USA). Cells are acquired on an LSRFortessa (Becton Dickinson, USA) and analysis is 10 performed using the FlowJo software (TreeStar, USA). Proliferation is assessed in each population as the proportion of cells having diluted CFSE. Suppression is assessed for each condition in comparison to the responders plated alone.

Those skilled in the art will recognize, or be able to ascertain, using no more than routine experimentation, numerous equivalents to the specific embodiments described specifically herein. Such 15 equivalents are intended to be encompassed in the scope of the following claims.