The present disclosure relates to compounds and pharmaceutical compositions comprising the same for the treatment, amelioration and/or prevention of disease. In some embodiments, the disease is a bacterial infection, preferably a bacterial infection caused by one or more bacterium belonging to the species A. baumannii, and/or S. aureus, and/or a genus of non-tuberculous Mycobacteria (NTM), preferably M. abscessus.

RELATED ART

Rifamycins such as rifabutin are known antibiotics with activity against a broad spectrum of pathogens such as Clostridium spp., Enterococcus spp., Hemophilus spp., Legionella spp., Mycobacterium spp. (tuberculous and non-tuberculous Mycobacteria), Neisseria spp. , Staphylococcus spp. , Streptococcus spp. , Listeria monocytogenes, Moraxella catarrhalis, Bacillus spp., Bacteroides spp., Gardnerella vaginalis, Lactobacillus spp., Mobiluncus spp., Helicobacter pylori, Campylobacter jejuni, Chlamydia trachomatis and Toxoplasma gondii (Kunin, Clin. Infect. Dis., 1996; Farr and Mandell, Med. Clin. North. Am., 1982; Thomsberry et al., Rev. Infect. Dis., 1983; Hoover et al., Diagn. Microbiol. Infect. Dis., 1993; Kerry et al., J. Antimicrob. Chemother., 1975).

Rifabutin has been recently shown to have potent in vitro and in vivo activity against Mycobacterium abscessus (Aziz et al., Antimicrob. Agents Chemother., 2017; Dick et al., Antimicrob. Agents Chemother., 2020) and Acinetobacter baumannii (Luna et al., Nat. Microbiol., 2020; Trebosc et al., Drug Discov. Today, 2021; Trebosc et al., J. Antimicrob. Chemother., 2020). However, A. baumannii can show reduced rifabutin sensitivity through mechanisms such as mutation of the RNA polymerase B-subunit (RpoB) gene or expression of the ADP ribosyl transferase (Arr) enzyme (Trebosc et al., J. Antimicrob. Chemother., 2020). The Arr enzyme ribosylates rifamycins at the C23 carbon, and mutations of the RpoB subunit limits the ability of rifabutin to interact with and inhibit the RpoB subunit. Moreover, M. abscessus endogenously encodes the gene coding for the Arr enzyme, making it naturally less sensitive to treatment with rifabutin (Schafle et al., Antimicrob. Agents Chemother., 2021). Accordingly, there is a need for more effective rifamycins for the treatment of bacterial infections such as M. abscessus and A. baumannii infections. P6306PC00 SUMMARY OF THE INVENTION In one aspect, the present disclosure provides a compound of the Formula I or a pharmaceutically acceptable salt, tautomer, solvate, hydrate or enantiomer thereof: X1 Y1 O wherein: Y1 is (CR1R2) _n , wherein n is an integer from 1 to 6 and R1 and R2 are independently, at each occurrence, selected from the group consisting of hydrogen, -C1-C6 alkyl, and -C1-C6 alkoxy, wherein each alkyl is optionally substituted with one or more halogen or -C ₃ -C ₆ cycloalkyl, and wherein each cycloalkyl is further optionally substituted with one or more halogen; X1 is -OR11 or -NR51R ^{^ ^} ; R ¹¹ is independently -C ₁ -C ₆ alkyl, -C ₁ -C ₆ alkylene-R ^12A , -C ₂ -C ₆ alkenyl, -C ₂ -C ₆ alkynyl, -C3-C6 cycloalkyl, -C5-C8 cycloalkenyl, 3-10 membered heterocycloalkyl, -C6-C10 aryl, or 5-10 membered heteroaryl, wherein each alkyl, alkylene, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, heterocycloalkyl, aryl or heteroaryl is optionally substituted with one or more R12; R12 and R12A are each independently -C ₁ -C ₆ alkyl, -C ₁ -C ₆ alkylene-R16A, -C ₂ -C ₆ alkenyl, -C2-C6 alkynyl, -C3-C6 cycloalkyl, -C5-C8 cycloalkenyl, 3-10 membered heterocycloalkyl, -C6- C10 aryl, 5-10 membered heteroaryl, -C1-C6 alkoxy, -C1-C6 haloalkyl, halogen, cyano, oxo, - OR13, -CO ₂ R13, or -NR14R15, wherein each alkyl, alkylene, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, heterocycloalkyl, aryl, heteroaryl and alkoxy is optionally substituted with one or more R16; R13, R14 and R15 are each independently hydrogen, -C 20A 1-C6 alkyl, -C1-C6 alkylene-R , -C2-C6 alkenyl, -C2-C6 alkynyl, -C3-C6 cycloalkyl, -C5-C8 cycloalkenyl, 3-10 membered heterocycloalkyl, -C ₆ -C ₁₀ aryl, 5-10 membered heteroaryl, -C ₁ -C ₆ alkoxy, -C ₁ -C ₆ haloalkyl, - S(O)2(C1-C6 alkyl), or -S(O)2NR18R19, wherein each alkyl, alkylene, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, heterocycloalkyl, aryl, heteroaryl and alkoxy is optionally substituted with one or more R20; R ¹⁶ and R ^16A are each independently -C1-C6 alkyl, -C1-C6 alkylene-R ^20A , -C2-C6 alkenyl, -C ₂ -C ₆ alkynyl, -C ₃ -C ₆ cycloalkyl, -C ₅ -C ₈ cycloalkenyl, 3-10 membered heterocycloalkyl, -C ₆ - C10 aryl, 5-10 membered heteroaryl, -C1-C6 alkoxy, -C1-C6 haloalkyl, halogen, cyano, oxo, -10 OR17, -S(O) ₂ (C ₁ -C ₆ alkyl), or -S(O) ₂ NR18R19, wherein each alkyl, alkylene, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, heterocycloalkyl, aryl, heteroaryl and alkoxy is optionally substituted with one or more R20; R ¹⁷ , R ¹⁸ and R ¹⁹ are each independently hydrogen, halogen, -OH, -C ₁ -C ₆ alkyl, -C ₁ -C ₆ alkylene-R23A, -C ₂ -C ₆ alkenyl, -C ₂ -C ₆ alkynyl, -C ₃ -C ₆ cycloalkyl, -C ₅ -C ₈ cycloalkenyl, 3-10 membered heterocycloalkyl, -C6-C10 aryl, 5-10 membered heteroaryl, -C1-C6 alkoxy, -C1-C6 haloalkyl, -S(O) ₂ (C ₁ -C ₆ alkyl), or S(O) ₂ NR21R22, wherein each alkyl, alkylene, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, heterocycloalkyl, aryl, heteroaryl and alkoxy is optionally substituted with one or more R ²³ ; R20 and R20A are each independently halogen, -OH, -C ₁ -C ₆ alkyl, -C ₁ -C ₆ alkylene-R23A, -C2-C6 alkenyl, -C2-C6 alkynyl, -C3-C6 cycloalkyl, -C5-C8 cycloalkenyl, 3-10 membered heterocycloalkyl, -C ₆ -C ₁₀ aryl, 5-10 membered heteroaryl, -C ₁ -C ₆ alkoxy, -C ₁ -C ₆ haloalkyl, halogen, cyano, oxo, -S(O)2(C1-C6 alkyl), or S(O)2NR21R22, wherein each alkyl, alkylene, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, heterocycloalkyl, aryl, heteroaryl and alkoxy is optionally substituted with one or more R ²³ ; 25 R21 and R22 are each independently hydrogen or -C1-C6 alkyl; and R23 and R23A are each independently -C ₁ -C ₆ alkyl, -C ₁ -C ₆ alkoxy, -C ₁ -C ₆ haloalkyl, halogen, or cyano; R51 and R52 are each independently hydrogen, -C 53A 1-C6 alkyl, -C1-C6 alkylene-R , -C2- C6 alkenyl, -C2-C6 alkynyl, -C3-C6 cycloalkyl, -C5-C8 cycloalkenyl, 3-10 membered heterocycloalkyl, -C ₆ -C ₁₀ aryl, or 5-10 membered heteroaryl, wherein each alkyl, alkylene, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, heterocycloalkyl, aryl or heteroaryl is optionally substituted with one or more R53; or R51 and R52, together with the nitrogen atom to which they are attached, combine to form a 3-15 membered heterocycloalkyl or 5-15 membered heteroaryl, wherein the heterocycloalkyl or heteroaryl are optionally substituted with one or more R53; R53 and R53A are each independently -C - 57A 1 C6 alkyl, -C1-C6 alkylene-R , -C2-C6 alkenyl, -C2-C6 alkynyl, -C3-C6 cycloalkyl, -C5-C8 cycloalkenyl, 3-10 membered heterocycloalkyl, -C6- C ₁₀ aryl, 5-10 membered heteroaryl, -C ₁ -C ₆ alkoxy, -C ₁ -C ₆ haloalkyl, halogen, cyano, oxo, - OR54, -C(O)R54, -CO2R54, or -NR55R56, wherein each alkyl, alkylene, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, heterocycloalkyl, aryl, heteroaryl and alkoxy is optionally substituted with one or more R57; R ⁵⁴ , R ⁵⁵ and R ⁵⁶ are each independently hydrogen, -C1-C6 alkyl, -C1-C6 alkylene-R ^61A , -C ₂ -C ₆ alkenyl, -C ₂ -C ₆ alkynyl, -C ₃ -C ₆ cycloalkyl, -C ₅ -C ₈ cycloalkenyl, 3-10 membered heterocycloalkyl, -C6-C10 aryl, 5-10 membered heteroaryl, -C1-C6 alkoxy, -C1-C6 haloalkyl, - CO ₂ R58, -S(O) ₂ (C ₁ -C ₆ alkyl), -S(O) ₂ (C ₆ -C ₁₀ aryl), or -S(O) ₂ NR59R60, wherein each alkyl, alkylene, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, heterocycloalkyl, aryl, heteroaryl and alkoxy is optionally substituted with one or more R61; R ⁵⁷ and R ^57A are each independently -C ₁ -C ₆ alkyl, -C ₁ -C ₆ alkylene-R ^61A , -C ₂ -C ₆ alkenyl, -C ₂ -C ₆ alkynyl, -C ₃ -C ₆ cycloalkyl, -C ₅ -C ₈ cycloalkenyl, 3-10 membered heterocycloalkyl, -C ₆ - C10 aryl, 5-10 membered heteroaryl, -C1-C6 alkoxy, -C1-C6 haloalkyl, halogen, cyano, oxo, - OR58, NR59R60, -S(O) ₂ (C ₁ -C ₆ alkyl), or -S(O) ₂ NR59R60, wherein each alkyl, alkylene, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, heterocycloalkyl, aryl, heteroaryl and alkoxy is optionally substituted with one or more R ⁶¹ ; R58, R59 and R60 are each independently hydrogen, -C ₁ -C ₆ alkyl, -C ₁ -C ₆ alkylene-R64, - C2-C6 alkenyl, -C2-C6 alkynyl, -C3-C6 cycloalkyl, -C5-C8 cycloalkenyl, 3-10 membered heterocycloalkyl, -C ₆ -C ₁₀ aryl, 5-10 membered heteroaryl, -C ₁ -C ₆ alkoxy, -C ₁ -C ₆ haloalkyl, - S(O) (C -C alkyl), or S(O) N 62 63 2 1 6 2 R R , wherein each alkyl, alkylene, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, heterocycloalkyl, aryl, heteroaryl and alkoxy is optionally substituted with one or more R ⁶⁴ ; R61 and R61A are each independently halogen, -OH, -C -C alkyl, -C -C alkylene- 64A 1 6 1 6 R , -C ₂ -C ₆ alkenyl, -C ₂ -C ₆ alkynyl, -C ₃ -C ₆ cycloalkyl, -C ₅ -C ₈ cycloalkenyl, 3-10 membered heterocycloalkyl, -C ₆ -C ₁₀ aryl, 5-10 membered heteroaryl, -C ₁ -C ₆ alkoxy, -C ₁ -C ₆ haloalkyl, halogen, cyano, oxo, -S(O)2(C1-C6 alkyl), or S(O)2NR62R63, wherein each alkyl, alkylene, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, heterocycloalkyl, aryl, heteroaryl and alkoxy is optionally substituted with one or more R ⁶⁴ ; and R62 and R63 are each independently hydrogen and -C1-C6 alkyl; and R64 and R64A are each independently -C ₁ -C ₆ alkyl, -C ₁ -C ₆ alkoxy, -C ₁ -C ₆ haloalkyl, phenyl, halogen, or cyano. In one aspect, the present disclosure provides a pharmaceutical composition comprising a compound as described herein (preferably a compound of Formula I), or a pharmaceutically acceptable salt thereof, and a pharmaceutically acceptable carrier. In some preferred embodiments, the pharmaceutical composition is effective for treating a bacterial infection. In some preferred embodiments, the bacterial infection is caused by one or more bacterium belonging to the genus Acinetobacter, Staphylococcus, and/ or Mycobacteria . In some preferred embodiments, the bacterial infection is caused by one or more bacterium belonging to the species A. baumannii, and/or S. aureus, and/or a genus of non-tuberculous Mycobacteria, preferably M. abscessus. In preferred embodiments, the bacterial infection is caused by one or more bacterium belonging to a genus of non-tuberculous Mycobacteria, preferably M. abscessus. In some embodiments, the infection is caused by one or more bacterium belonging to the genus Acinetobacter and/ or Staphylococcus, preferably A. baumannii and/or S. aureus.

In one aspect, the present disclosure provides a compound as described herein (preferably a compound of Formula I), or a pharmaceutically acceptable salt thereof, for use in a method for treating a bacterial infection. In some preferred embodiments, the bacterial infection is caused by one or more bacterium belonging to the genus Acinetobacter, Staphylococcus, and/or Mycobacteria. In some preferred embodiments, the bacterial infection is caused by one or more bacterium belonging to the species A. baumannii, and/or S. aureus, and/or a genus of non-tuberculous Mycobacteria, preferably M. abscessus. In preferred embodiments, the bacterial infection is caused by one or more bacterium belonging to a genus of non-tuberculous Mycobacteria, preferably M. abscessus. In some embodiments, the infection is caused by one or more bacterium belonging to the genus Acinetobacter and/or Staphylococcus, preferably A. baumannii and/or S. aureus.

In one aspect, the present disclosure provides a use of a compound as described herein (preferably a compound of Formula I), or a pharmaceutically acceptable salt thereof, or pharmaceutical composition comprising a compound as described herein in the manufacture of a medicament for treating a bacterial infection. In some preferred embodiments, the bacterial infection is caused by one or more bacterium belonging to the genus Acinetobacter, Staphylococcus, and/or Mycobacteria. In some preferred embodiments, the bacterial infection is caused by one or more bacterium belonging to the species A. baumannii, and/or S. aureus, and/or a genus of non-tuberculous Mycobacteria, preferably M. abscessus. In preferred embodiments, the bacterial infection is caused by one or more bacterium belonging to a genus of non-tuberculous Mycobacteria, preferably M. abscessus. In some embodiments, the infection is caused by one or more bacterium belonging to the genus Acinetobacter and/or Staphylococcus, preferably A. baumannii and/or S. aureus. In one aspect, the present disclosure provides a method of treating a bacterial infection in a subject in need thereof, comprising administering to the subject a therapeutically effective amount of a compound as described herein (preferably a compound of Formula I) or a pharmaceutically acceptable salt thereof. In some preferred embodiments, the bacterial infection is caused by one or more bacterium belonging to the genus Acinetobacter , Staphylococcus, and/ or Mycobacteria. In some preferred embodiments, the bacterial infection is caused by one or more bacterium belonging to the species A. baumannii, and/or S. aureus, and/or a genus of non-tuberculous Mycobacteria, preferably M. abscessus. In preferred embodiments, the bacterial infection is caused by one or more bacterium belonging to a genus of non-tuberculous Mycobacteria, preferably M. abscessus. In some embodiments, the infection is caused by one or more bacterium belonging to the genus Acinetobacter and/or Staphylococcus, preferably A. baumannii and/or S. aureus.

The present disclosure provides rifabutin analogs that are modified at the C25 acetate and pharmaceutical compositions thereof. The inventive compounds exhibit broad antibacterial activity against a wide array of bacterial species, and thus maintain the broad antibacterial activity characteristic of the rifamycin class of antibiotics. In addition, the compounds showed enhanced and unexpected activity against various strains of M. abscessus and A. baumannii compared with currently available antibiotics, including rifamycins such as rifabutin and rifampicin. In preferred embodiments the inventive compounds are particularly active against strains that harbor resistance mutations making the strains resistant to current antibiotics. In preferred embodiments said resistance mechanisms are mutations in the RpoB gene and/or expression of the Arr enzyme. Additional features and advantages of the present technology will be apparent to one of skill in the art upon reading the Detailed Description, below.

DETAILED DESCRIPTION

The present disclosure provides analogs of rifabutin that are effective in treating bacterial infections, preferably bacterial infections caused by one or more bacterium belonging to a genus of non-tuberculous Mycobacteria, preferably M. abscessus.

The details of the technology are set forth in the accompanying description below. Although methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present technology, 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 as commonly understood by one of ordinary skill in the art to which this technology belongs.

Definitions

Unless defined otherwise, all technical and scientific terms used herein have the same meanings as commonly understood by one of ordinary skill in the art to which this disclosure belongs.

The articles “a” and “an” are used in this disclosure to refer to one or more than one (i.e., 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” is used in this disclosure to mean either “and” or “or” unless indicated otherwise.

The term “optionally substituted” is understood to mean that a given chemical moiety (e.g. an alkyl group) can (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 (i.e. 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.

The term “aryl” refers to cyclic, aromatic hydrocarbon groups that have 1 to 2 aromatic rings, including monocyclic or bicyclic groups such as phenyl, biphenyl or naphthyl. A -Ce- Cio aryl group contains between 6 and 10 carbon atoms. When containing two aromatic rings (bicyclic, etc.), the aromatic rings of the aryl group may be joined at a single point (e.g., biphenyl), or fused (e.g., naphthyl). The aryl group may be 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, -O-Ci-Ce alkyl, -Ci-Ce alkyl, -OC2-C6 alkenyl, - OC2-C6 alkynyl, -C2-C6 alkenyl, -C2-C6 alkynyl, -OH, -OP(O)(OH) ₂ , -OC(O)Ci-C ₆ alkyl, - C(O)Ci-C ₆ alkyl, -OC(O)OCi-C ₆ alkyl, -NH ₂ , -NH(CI-C ₆ alkyl), -N(CI-C ₆ alkyl) ₂ , -S(O) ₂ -Ci- Ce alkyl, -S(O)NHCi-Ce alkyl, and -S(O)N(Ci-Ce alkyl)2. The substituents can themselves be optionally substituted. 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 aryl groups include indanyl, indenyl, tetrahydronaphthalenyl, and tetrahydrobenzoannulenyl. Unless otherwise specifically defined, “heteroaryl” means a monovalent monocyclic or polycyclic aromatic radical of 5 to 24 ring atoms or a polycyclic aromatic radical, containing one or more ring heteroatoms selected from N, S, P, and O, the remaining ring atoms being C. A 5-15 membered heteroaryl group contains between 5 and 15 atoms, whereas a 5-10 membered heteroaryl group contains between 5 and 10 atoms. Heteroaryl as herein defined also means a bicyclic heteroaromatic group wherein the heteroatom is selected from N, S, P, and O, preferably N, S, and O, more preferably N and O. The aromatic radical is optionally substituted independently with one or more substituents described herein. Examples include, but 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, 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, tetrahydro pyrrolo[1,2-a]pyrimidinyl, 3,4-dihydro-2H- 1λ2-pyrrolo[2,1-b]pyrimidine, dibenzo[b,d]thiophene, pyridin-2-one, furo[3,2-c]pyridinyl, furo[2,3-c]pyridinyl, 1H-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[1,5-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-b]pyrrolyl, 3H-indolyl, and derivatives thereof. The term “alkyl” refers to a straight or branched chain saturated hydrocarbon. -C1-C6 alkyl groups contain 1 to 6 carbon atoms. Examples of a -C ₁ -C ₆ alkyl group include, but are not limited to, methyl, ethyl, propyl, butyl, pentyl, isopropyl, isobutyl, sec-butyl and tert-butyl, isopentyl and neopentyl. The term “alkenyl” means an aliphatic hydrocarbon group containing a carbon-carbon double bond and which may be straight or branched. A -C ₂ -C ₆ alkenyl group is an alkenyl group containing between 2 and 6 carbon atoms. Some alkenyl groups have 2 to about 4 carbon atoms in the chain. Branched means that one or more lower alkyl groups such as methyl, ethyl, or propyl are attached to a linear alkenyl chain. Exemplary alkenyl groups include ethenyl, propenyl, n-butenyl, and i-butenyl. As used herein, the term “alkenyl” includes groups that contain a carbon-carbon double bond anywhere within the carbon chain.

The term “alkynyl” means an aliphatic hydrocarbon group containing a carbon-carbon triple bond and which may be straight or branched. A -C2-C6 alkynyl group is an alkynyl group containing between 2 and 6 carbon atoms. Some alkynyl groups have 2 to about 4 carbon atoms in the chain. Branched means that one or more lower alkyl groups such as methyl, ethyl, or propyl are attached to a linear alkynyl chain. Exemplary alkynyl groups include ethynyl, propynyl, n-butynyl, 2-butynyl, 3-methylbutynyl, and n-pentynyl. As used herein, the term “alkynyl” includes groups that contain a carbon-carbon triple bond anywhere within the carbon chain.

The terms “alkylene” or “alkylenyl,” as used herein, refer to a straight or branched hydrocarbon chain bi-radical derived from alkyl, as defined herein, wherein one hydrogen of said alkyl is cleaved off generating the second radical of said alkylene. Examples of alkylene are, by way of illustration, -CH2-, -CH2-CH2-, -CH(CHs)-, -CH2-CH2-CH2-, -CH(CH ₃ )-CH ₂ -, or -CH(CH ₂ CH ₃ )-.

The term “cycloalkyl” means monocyclic or polycyclic saturated carbon rings containing 3-18 carbon atoms. A -C ₃ -Ce cycloalkyl contains between 3 and 6 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. A -C ₃ -Cs 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., norbomane).

The term “cycloalkenyl” means monocyclic, non-aromatic unsaturated carbon rings containing 5-18 carbon atoms. Examples of cycloalkenyl groups include, without limitation, cyclopentenyl, cyclohexenyl, cycloheptenyl, cyclooctenyl, and norborenyl. A -C'5-Cs cycloalkenyl is a cycloalkenyl group containing between 5 and 8 carbon atoms.

The terms “heterocyclyl” or “heterocycloalkyl” or “heterocycle” refer to monocyclic or polycyclic 3 to 24-membered ring system containing carbon and heteroatoms taken from oxygen, nitrogen, or sulfur (preferably oxygen and nitrogen) and wherein at least one ring does not comprise delocalized n electrons (aromaticity) shared among the ring carbon or heteroatoms. A 3-15 membered heterocycloalkyl group contains between 3 and 15 atoms, and a 3-10 membered heterocycloalkyl group contains between 3 and 10 atoms. Heterocyclyl rings include, but are not limited to, oxetanyl, azetadinyl, tetrahydrofuranyl, pyrrolidinyl, oxazolinyl, oxazolidinyl, thiazolinyl, thiazolidinyl, pyranyl, thiopyranyl, tetrahydropyranyl, dioxalinyl, piperidinyl, morpholinyl, thiomorpholinyl, thiomorpholinyl S-oxide, thiomorpholinyl S- dioxide, piperazinyl, azepinyl, oxepinyl, diazepinyl, tropanyl, and homotropanyl.

A heterocyclyl or heterocycloalkyl ring can also be fused or bridged, e.g., can be a bicyclic or tricyclic ring. Furthermore, when containing two or more fused rings, the heterocycloalkyl groups herein defined can have an unsaturated or partially saturated ring fused with an aromatic or heteroaromatic ring or fused aromatic or heteroaromatic ring system. Exemplary ring systems of such heterocyle-aryl or heterocyle-heteroaryl groups include indolinyl, indolinonyl, dihydrobenzothiophenyl, dihydrobenzofuran, chromanyl, thiochromanyl, tetrahydroquinolinyl, dihydrobenzothiazine, 3,4-dihydro-lH— isoquinolinyl, 2,3 -dihydrobenzofuran, indolinyl, indolyl, and dihydrobenzoxanyl.

A heterocyclyl or heterocycloalkyl ring can also be a spirocyclic heterocycle or spiroheterocycle. As used herein a spirocyclic heterocycle or spiroheterocycle is understood to mean a bicyclic or multicyclic ring system in which at least two rings are connected through a single atom, and wherein at least one of the rings is a heterocycle (e.g., at least one of the rings is furanyl, morpholinyl, or piperadinyl). One or both of the rings in a spiroheterocycle can be can be fused to one or more additional carbocyclic, heterocyclic, aromatic, or heteroaromatic ring to form, e.g., a tricyclic ring system in which two of the rings are connected through a single atom.

As used herein, the term “halo” or “halogen” means fluoro (F), chloro (Cl), bromo (Br), or iodo (I).

As used herein, the term "haloalkyl" refers to an alkyl group substituted with one or more (preferably 1 to 6, more preferably 1 to 3) halogen atoms which are selected independently from fluoro, chloro, bromo and iodo, and are preferably all fluoro atoms. It will be understood that the maximum number of halogen atoms is limited by the number of available attachment sites and, thus, depends on the number of carbon atoms comprising the alkyl moiety of the haloalkyl group. "Haloalkyl" may, e.g., refer to CFs, CHF2, CH2F, CF2CH3, CH2CF3, CH2CHF2, CH2CF2CH3, CH2CF2CF3, or CH(CF ₃ ) ₂ . Very preferred "haloalkyl" as substituents for the inventive compounds are CF3, CHF2, and CH2CF3, and again further preferred are CF3 and CHF2.

The term “carbonyl” refers to a functional group composing a carbon atom doublebonded to an oxygen atom. It can be abbreviated herein as “oxo”, as C(O), or as C=O. “Ci-Ce-alkoxy”, as used herein, refers to a "substituted hydroxyl" of the formula (-OR ¹ ), wherein R' is an optionally substituted -Ci-Ce alkyl, as defined herein, and the oxygen moiety is directly attached to the parent molecule, and thus the term “Ci-Ce alkoxy”, as used herein, refers to straight chain or branched -Ci-Ce alkoxy which may be, for example, methoxy, ethoxy, n-propoxy, isopropoxy, n-butoxy, isobutoxy, scc-butoxy. /c/7-butoxy. straight or branched pentoxy, straight or branched hexyloxy. Preferred are -C1-C4 alkoxy and -Ci-C3 alkoxy.

The disclosure also includes pharmaceutical compositions comprising an effective amount of a disclosed compound and a pharmaceutically acceptable carrier. Representative “pharmaceutically acceptable salts” include, e.g., water-soluble and water-insoluble salts, such as the acetate, amsonate (4,4-diaminostilbene-2,2-disulfonate), benzenesulfonate, benzonate, bicarbonate, bisulfate, bitartrate, borate, bromide, butyrate, calcium, calcium edetate, camsylate, carbonate, chloride, citrate, clavulariate, dihydrochloride, edetate, edisylate, estolate, esylate, fumarate, gluceptate, gluconate, glutamate, glycollylarsanilate, hexafluorophosphate, hexylresorcinate, hydrabamine, hydrobromide, hydrochloride, hydroxynaphthoate, hydroiodide, sethionate, lactate, lactobionate, laurate, magnesium, malate, maleate, mandelate, mesylate, methylbromide, methylnitrate, methyl sulfate, mucate, napsylate, nitrate, N-methylglucamine ammonium salt, 3-hydroxy-2-naphthoate, oleate, oxalate, palmitate, pamoate (l,l-methene-bis-2-hydroxy-3-naphthoate, einbonate), pantothenate, phosphate/diphosphate, picrate, polygalacturonate, propionate, p-toluenesulfonate, salicylate, stearate, subacetate, succinate, sulfate, sulfosalicylate, suramate, tannate, tartrate, teoclate, tosylate, triethiodide, and valerate salts.

The term “stereoisomers” refers to the set of compounds which have the same number and type of atoms and share the same bond connectivity between those atoms, but differ in three-dimensional structure. The term “stereoisomer” refers to any member of this set of compounds.

The term “diastereomers” refers to the set of stereoisomers which cannot be made superimposable by rotation around single bonds. For example, cis- and trans-double bonds, endo- and exo-substitution on bicyclic ring systems, and compounds containing multiple stereogenic centers with different relative configurations are considered to be diastereomers. The term “diastereomer” refers to any member of this set of compounds. In some examples presented, the synthetic route may produce a single diastereomer or a mixture of diastereomers. In some cases these diastereomers were separated and in other cases a wavy bond is used to indicate the structural element where configuration is variable.

The term “enantiomers” refers to a pair of stereoisomers which are non-superimposable mirror images of one another. The term “enantiomer” refers to a single member of this pair of stereoisomers. The term “racemic” refers to a 1:1 mixture of a pair of enantiomers.

The term “tautomers” refers to a set of compounds that have the same number and type of atoms, but differ in bond connectivity and are in equilibrium with one another. A “tautomer” is a single member of this set of compounds. Typically a single tautomer is drawn but it is understood that this single structure is meant to represent all possible tautomers that might exist. Examples include enol-ketone tautomerism. When a ketone is drawn it is understood that both the enol and ketone forms are part of the present disclosure.

An “effective amount” when used in connection with a compound is an amount effective for treating or preventing a disease in a subject as described herein.

The term “carrier”, as used in this disclosure, 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.

The term “treating” with regard to a subject, refers to improving at least one symptom of the subject's disorder. Treating includes curing, improving, or at least partially ameliorating the disorder.

The term “disorder” is used in this disclosure to mean, and is used interchangeably with, the terms disease, condition, or illness, unless otherwise indicated.

The term “administer”, “administering”, or “administration” as used in this disclosure refers to either directly administering a disclosed compound or pharmaceutically acceptable salt of the disclosed compound or a composition to a 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.

The term “solvate” refers to a complex of variable stoichiometry formed by a solute and solvent. Such solvents for the purpose of the disclosure may not interfere with the biological activity of the solute. Examples of suitable solvents include, but are not limited to, water, MeOH, EtOH, and AcOH. Solvates wherein water is the solvent molecule are typically referred to as “hydrates.” Hydrates include compositions containing stoichiometric amounts of water, as well as compositions containing variable amounts of water.

A “patient” or “subject” is a mammal, e.g., a human, mouse, rat, guinea pig, dog, cat, horse, cow, pig, or non-human primate, such as a monkey, chimpanzee, baboon or rhesus. As used herein, the “Arr” enzyme refers to the ADP ribosyl transferase enzyme. In preferred embodiments the Arr enzyme ribosylates rifamycins and rifamycin derivatives at the C23 carbon. In some embodiments, compounds of Formula I can be used to treat bacterial infections caused by bacteria expressing or overexpressing Arr.

As used herein, “RpoB” refers to the RNA polymerase B-subunit, preferably a bacterial RNA polymerase B-subunit. In some embodiments, compounds of Formula I can be used to treat bacterial infections caused by bacteria having a resistance mutation in the RpoB gene.

Compounds of the Invention

In one aspect, the present invention provides a compound of the Formula I or a pharmaceutically acceptable salt, tautomer, solvate, hydrate or enantiomer thereof: wherein:

Y ¹ is (CR ^J R ² )n, wherein n is an integer from 1 to 6 and R ¹ and R ² are independently, at each occurrence, selected from the group consisting of hydrogen, -Ci-Ce alkyl, and -Ci-Ce alkoxy, wherein each alkyl is optionally substituted with one or more halogen or -Cs-Ce cycloalkyl, and wherein each cycloalkyl is further optionally substituted with one or more halogen;

X ¹ is -OR ¹¹ or -NR ⁵¹ R ⁵² ;

R ¹¹ is independently -Ci-Ce alkyl, -Ci-Ce alkylene-R ^12A , -C2-C6 alkenyl, -C2-C6 alkynyl, -Cs-Ce cycloalkyl, -C5-C8 cycloalkenyl, 3-10 membered heterocycloalkyl, -Ce-Cio aryl, or 5-10 membered heteroaryl, wherein each alkyl, alkylene, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, heterocycloalkyl, aryl or heteroaryl is optionally substituted with one or more R ¹² ; R12 and R12A are each independently -C1-C6 alkyl, -C1-C6 alkylene-R16A, -C2-C6 alkenyl, -C2-C6 alkynyl, -C3-C6 cycloalkyl, -C5-C8 cycloalkenyl, 3-10 membered heterocycloalkyl, -C6- C ₁₀ aryl, 5-10 membered heteroaryl, -C ₁ -C ₆ alkoxy, -C ₁ -C ₆ haloalkyl, halogen, cyano, oxo, - OR13, -CO2R13, or -NR14R15, wherein each alkyl, alkylene, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, heterocycloalkyl, aryl, heteroaryl and alkoxy is optionally substituted with one or more R16; R ¹³ , R ¹⁴ and R ¹⁵ are each independently hydrogen, -C1-C6 alkyl, -C1-C6 alkylene-R ^20A , -C ₂ -C ₆ alkenyl, -C ₂ -C ₆ alkynyl, -C ₃ -C ₆ cycloalkyl, -C ₅ -C ₈ cycloalkenyl, 3-10 membered heterocycloalkyl, -C6-C10 aryl, 5-10 membered heteroaryl, -C1-C6 alkoxy, -C1-C6 haloalkyl, - S(O) ₂ (C ₁ -C ₆ alkyl), or -S(O) ₂ NR18R19, wherein each alkyl, alkylene, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, heterocycloalkyl, aryl, heteroaryl and alkoxy is optionally substituted with one or more R20; R ¹⁶ and R ^16A are each independently -C ₁ -C ₆ alkyl, -C ₁ -C ₆ alkylene-R ^20A , -C ₂ -C ₆ alkenyl, -C ₂ -C ₆ alkynyl, -C ₃ -C ₆ cycloalkyl, -C ₅ -C ₈ cycloalkenyl, 3-10 membered heterocycloalkyl, -C ₆ - C10 aryl, 5-10 membered heteroaryl, -C1-C6 alkoxy, -C1-C6 haloalkyl, halogen, cyano, oxo, - OR17, -S(O) ₂ (C ₁ -C ₆ alkyl), or -S(O) ₂ NR18R19, wherein each alkyl, alkylene, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, heterocycloalkyl, aryl, heteroaryl and alkoxy is optionally substituted with one or more R ²⁰ ; R17, R18 and R19 are each independently hydrogen, halogen, -OH, -C ₁ -C ₆ alkyl, -C ₁ -C ₆ alkylene-R23A, -C2-C6 alkenyl, -C2-C6 alkynyl, -C3-C6 cycloalkyl, -C5-C8 cycloalkenyl, 3-10 membered heterocycloalkyl, -C ₆ -C ₁₀ aryl, 5-10 membered heteroaryl, -C ₁ -C ₆ alkoxy, -C ₁ -C ₆ haloalkyl, -S(O)2(C1-C6 alkyl), or S(O)2NR21R22, wherein each alkyl, alkylene, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, heterocycloalkyl, aryl, heteroaryl and alkoxy is optionally substituted with one or more R ²³ ; R20 and R20A are each independently halogen, -OH, -C 23A 1-C6 alkyl, -C1-C6 alkylene-R , -C ₂ -C ₆ alkenyl, -C ₂ -C ₆ alkynyl, -C ₃ -C ₆ cycloalkyl, -C ₅ -C ₈ cycloalkenyl, 3-10 membered heterocycloalkyl, -C ₆ -C ₁₀ aryl, 5-10 membered heteroaryl, -C ₁ -C ₆ alkoxy, -C ₁ -C ₆ haloalkyl, halogen, cyano, oxo, -S(O)2(C1-C6 alkyl), or S(O)2NR21R22, wherein each alkyl, alkylene, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, heterocycloalkyl, aryl, heteroaryl and alkoxy is optionally substituted with one or more R ²³ ; R21 and R22 are each independently hydrogen or -C1-C6 alkyl; and R23 and R23A are each independently -C ₁ -C ₆ alkyl, -C ₁ -C ₆ alkoxy, -C ₁ -C ₆ haloalkyl, halogen, or cyano; R51 and R52 are each independently hydrogen, -C 53A 1-C6 alkyl, -C1-C6 alkylene-R , -C2- C6 alkenyl, -C2-C6 alkynyl, -C3-C6 cycloalkyl, -C5-C8 cycloalkenyl, 3-10 membered heterocycloalkyl, -C ₆ -C ₁₀ aryl, or 5-10 membered heteroaryl, wherein each alkyl, alkylene, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, heterocycloalkyl, aryl or heteroaryl is optionally substituted with one or more R53; or R51 and R52, together with the nitrogen atom to which they are attached, combine to form a 3-15 membered heterocycloalkyl or 5-15 membered heteroaryl, wherein the heterocycloalkyl or heteroaryl are optionally substituted with one or more R ⁵³ ; R53 and R53A are each independently -C ₁ -C ₆ alkyl, -C ₁ -C ₆ alkylene-R57A, -C ₂ -C ₆ alkenyl, -C2-C6 alkynyl, -C3-C6 cycloalkyl, -C5-C8 cycloalkenyl, 3-10 membered heterocycloalkyl, -C6- C ₁₀ aryl, 5-10 membered heteroaryl, -C ₁ -C ₆ alkoxy, -C ₁ -C ₆ haloalkyl, halogen, cyano, oxo, - OR54, -C(O)R54, -CO2R54, or -NR55R56, wherein each alkyl, alkylene, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, heterocycloalkyl, aryl, heteroaryl and alkoxy is optionally substituted with one or more R ⁵⁷ ; R54, R55 and R56 are each independently hydrogen, -C ₁ -C ₆ alkyl, -C ₁ -C ₆ alkylene-R61A, -C2-C6 alkenyl, -C2-C6 alkynyl, -C3-C6 cycloalkyl, -C5-C8 cycloalkenyl, 3-10 membered heterocycloalkyl, -C ₆ -C ₁₀ aryl, 5-10 membered heteroaryl, -C ₁ -C ₆ alkoxy, -C ₁ -C ₆ haloalkyl, - CO ₂ R58, -S(O) ₂ (C ₁ -C ₆ alkyl), -S(O) ₂ (C ₆ -C ₁₀ aryl), or -S(O) ₂ NR59R60, wherein each alkyl, alkylene, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, heterocycloalkyl, aryl, heteroaryl and alkoxy is optionally substituted with one or more R61; R57 and R57A are each independently -C1-C6 alkyl, -C1-C6 alkylene-R61A, -C2-C6 alkenyl, -C ₂ -C ₆ alkynyl, -C ₃ -C ₆ cycloalkyl, -C ₅ -C ₈ cycloalkenyl, 3-10 membered heterocycloalkyl, -C ₆ - C10 aryl, 5-10 membered heteroaryl, -C1-C6 alkoxy, -C1-C6 haloalkyl, halogen, cyano, oxo, - OR58, NR59R60, -S(O) ₂ (C ₁ -C ₆ alkyl), or -S(O) ₂ NR59R60, wherein each alkyl, alkylene, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, heterocycloalkyl, aryl, heteroaryl and alkoxy is optionally substituted with one or more R61; R58, R59 and R60 are each independently hydrogen, -C ₁ -C ₆ alkyl, -C ₁ -C ₆ alkylene-R64, - C ₂ -C ₆ alkenyl, -C ₂ -C ₆ alkynyl, -C ₃ -C ₆ cycloalkyl, -C ₅ -C ₈ cycloalkenyl, 3-10 membered heterocycloalkyl, -C6-C10 aryl, 5-10 membered heteroaryl, -C1-C6 alkoxy, -C1-C6 haloalkyl, - S(O) (C -C alkyl), or S( 62 63 2 1 6 O)2NR R , wherein each alkyl, alkylene, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, heterocycloalkyl, aryl, heteroaryl and alkoxy is optionally substituted with one or more R64; R61 and R61A are each independently halogen, -OH, -C ₁ -C ₆ alkyl, -C ₁ -C ₆ alkylene-R64A, -C2-C6 alkenyl, -C2-C6 alkynyl, -C3-C6 cycloalkyl, -C5-C8 cycloalkenyl, 3-10 membered heterocycloalkyl, -C ₆ -C ₁₀ aryl, 5-10 membered heteroaryl, -C ₁ -C ₆ alkoxy, -C ₁ -C ₆ haloalkyl, halogen, cyano, oxo, -S(O)2(C1-C6 alkyl), or S(O)2NR62R63, wherein each alkyl, alkylene, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, heterocycloalkyl, aryl, heteroaryl and alkoxy is optionally substituted with one or more R64; and R62 and R63 are each independently hydrogen and -C1-C6 alkyl; and 5 R64 and R64A are each independently -C1-C6 alkyl, -C1-C6 alkoxy, -C1-C6 haloalkyl, phenyl, halogen, or cyano. In some embodiments, Y ¹ is (CR ¹ R ² )n, wherein n is an integer from 1 to 5 and R ¹ and R2 are independently, at each occurrence, selected from hydrogen, -C ₁ -C ₄ alkyl, and -C ₁ -C ₄ alkoxy, wherein each alkyl is optionally substituted with one or more halogen or -C3-C6 cycloalkyl, and wherein each cycloalkyl is further optionally substituted with one or more halogens. In some embodiments, Y1 is (CR1R2) _n , wherein n is an integer from 1 to 4 and R1 and R ² are independently, at each occurrence, selected from hydrogen, -C ₁ -C ₄ alkyl, and -C ₁ -C ₄ alkoxy, wherein each alkyl is optionally substituted with one or more halogen or -C ₃ -C ₆ cycloalkyl, and wherein each cycloalkyl is further optionally substituted with one or more halogens. In some embodiments, Y1 is (CR1R2) _n , wherein n is an integer from 1 to 3 and R1 and R ² are independently, at each occurrence, selected from hydrogen, -C1-C4 alkyl, and -C1-C4 alkoxy, wherein each alkyl is optionally substituted with one or more halogen or -C ₃ -C ₆ cycloalkyl, and wherein each cycloalkyl is further optionally substituted with one or more halogens. In some embodiments, Y1 is (CR1R2)n, wherein n is an integer from 1 to 3 and R1 and R2 are independently, at each occurrence, selected from hydrogen, -C ₁ -C ₂ alkyl, and -C ₁ -C ₂ alkoxy, wherein each alkyl is optionally substituted with one or more fluorine, chlorine, or -C3- C6 cycloalkyl, and wherein each cycloalkyl is further optionally substituted with one or more fluorine or chlorine. In some embodiments, Y1 is (CR1R2) _n , wherein n is an integer from 1 to 3 and R1 and R2 are independently, at each occurrence, selected from hydrogen, and -C1-C2 alkyl, wherein each alkyl is optionally substituted with one or more fluorine, chlorine, or -C3-C6 cycloalkyl, and wherein each cycloalkyl is further optionally substituted with one or more fluorine or chlorine. In some embodiments, Y1 is (CR1R2) _n , wherein n is an integer from 1 to 3 and R1 and R2 are independently, at each occurrence, selected from hydrogen and -C1-C2 alkyl, wherein each alkyl is optionally substituted with one -C ₃ -C ₆ cycloalkyl, wherein said cycloalkyl is optionally substituted with one to three, preferably one or two halogens selected from fluorine and chlorine; or wherein each alkyl is optionally substituted with one to three, preferably one or two halogens selected from fluorine and chlorine. In some embodiments, Y1 is (CR1R2) 1 n, wherein n is an integer from 1 to 3 and R and R2 are independently, at each occurrence, selected from -H, methyl, and ethyl; wherein each methyl and ethyl is optionally substituted with one or more fluorine or chlorine. In some embodiments, Y ¹ is (CR ¹ R ² )n, wherein n is an integer from 1 to 3 and R ¹ and R2 are independently, at each occurrence, selected from -H, methyl, and ethyl. In some embodiments, the compound is of the Formula I-A: O R3 O ; wherein X1 is as defined in Formula I above or in subsequent embodiments herein; m is an integer between 0 and 4, preferably between 0 and 3, yet more preferably between 0 and 2; and R3 is selected from -H and -C1-C6 alkyl, preferably -H and -C1-C3 alkyl, more preferably -H, methyl and ethyl. In one embodiment, m is an integer from 0 to 3; preferably wherein m is an integer from 0 to 2; and wherein R3 is selected from -C ₁ -C ₆ alkyl, preferably -C ₁ -C ₄ alkyl, more preferably - C1-C3 alkyl, and yet more preferably methyl. In one embodiment, m is an integer from 0 to 3; preferably wherein m is an integer from 0 to 2; and wherein R ³ is hydrogen. In some embodiments, the compound is of the Formula I-B, Formula I-C, Formula I-D, Formula I-E, Formula I-F, or Formula I-G:

Formula l-D ormula l-E

1 O X1 X O O O O O O OH OH O OH OH O O OH O OH O NH NH O NH O NH O N O N O O N N Formula I-F ; Formula I-G ; wherein X1 is as defined for Formula I. In some preferred embodiments of any of Formula I, Formula I-A, Formula I-B, Formula I-C, Formula I-D, Formula I-E, Formula I-F, or Formula I-G, 5 R ¹¹ is independently -C ₁ -C ₆ alkyl, -C ₁ -C ₆ alkylene-R ^12A , -C ₃ -C ₆ cycloalkyl, -C ₅ -C ₈ cycloalkenyl, 3-10 membered heterocycloalkyl, -C ₆ -C ₁₀ aryl, or 5-10 membered heteroaryl, wherein each alkylene, cycloalkyl, cycloalkenyl, heterocycloalkyl, aryl or heteroaryl is optionally substituted with one or more R12; R12 and R12A are each independently -C ₁ -C ₆ alkyl, -C ₁ -C ₆ alkylene-R16A, -C ₃ -C ₆ 10 cycloalkyl, -C5-C8 cycloalkenyl, 3-10 membered heterocycloalkyl, -C6-C10 aryl, 5-10 membered heteroaryl, -C ₁ -C ₆ alkoxy, -C ₁ -C ₆ haloalkyl, halogen, cyano, oxo, -OR13, -CO ₂ R13, or -NR14R15, wherein each alkyl, alkylene, cycloalkyl, cycloalkenyl, heterocycloalkyl, aryl, heteroaryl and alkoxy is optionally substituted with one or more R16; R13, R14 and R15 are each independently hydrogen or -C1-C6 alkyl; and 15 R16 and R16A are each independently -C ₁ -C ₆ alkyl; R ⁵¹ and R ⁵² are each independently hydrogen, -C1-C6 alkyl, -C1-C6 alkylene-R ^53A , -C3- C6 cycloalkyl, -C5-C8 cycloalkenyl, 3-10 membered heterocycloalkyl, -C6-C10 aryl, or 5-10 membered heteroaryl, wherein each alkyl, alkylene, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, heterocycloalkyl, aryl or heteroaryl is optionally substituted with one or more R53; or R51 and 20 R52, together with the nitrogen atom to which they are attached, combine to form a 3-15 membered heterocycloalkyl or 5-15 membered heteroaryl, wherein the heterocycloalkyl or heteroaryl are optionally substituted with one or more R ⁵³ ; R53 and R53A are each independently -C -C a 57A 1 6 lkyl, -C1-C6 alkylene-R , -C2-C6 alkenyl, -C2-C6 alkynyl, -C3-C6 cycloalkyl, -C5-C8 cycloalkenyl, 3-10 membered heterocycloalkyl, -C6- C ₁₀ aryl, 5-10 membered heteroaryl, -C ₁ -C ₆ alkoxy, -C ₁ -C ₆ haloalkyl, halogen, cyano, oxo, - OR54, -C(O)R54, -CO2R54, or -NR55R56, wherein each alkyl, alkylene, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, heterocycloalkyl, aryl, heteroaryl and alkoxy is optionally substituted with one or more R57; R ⁵⁴ , R ⁵⁵ and R ⁵⁶ are each independently hydrogen, -C1-C6 alkyl, -C1-C6 alkylene-R ^61A , -C ₃ -C ₆ cycloalkyl, -C ₅ -C ₈ cycloalkenyl, 3-10 membered heterocycloalkyl, -C ₆ -C ₁₀ aryl, 5-10 membered heteroaryl, -C -C alkoxy, -C - 58 1 6 1 C6 haloalkyl, -CO2R , -S(O)2(C6-C10 aryl), - S(O) ₂ (C ₁ -C ₆ alkyl), or -S(O) ₂ NR59R60, wherein each alkyl, alkylene, cycloalkyl, cycloalkenyl, heterocycloalkyl, aryl, heteroaryl and alkoxy is optionally substituted with one or more R61; R57 and R57A are each independently -C ₁ -C ₆ alkyl, -C ₁ -C ₆ alkylene-R61A, -C ₂ -C ₆ alkenyl, -C ₂ -C ₆ alkynyl, -C ₃ -C ₆ cycloalkyl, -C ₅ -C ₈ cycloalkenyl, 3-10 membered heterocycloalkyl, -C ₆ - C ₁₀ aryl, 5-10 membered heteroaryl, -C ₁ -C ₆ alkoxy, -C ₁ -C ₆ haloalkyl, halogen, cyano, oxo, - OR58, NR59R60, -S(O) 59 60 2(C1-C6 alkyl), or -S(O)2NR R , wherein each alkyl, alkylene, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, heterocycloalkyl, aryl, heteroaryl and alkoxy is optionally substituted with one or more R61; R ⁵⁸ , R ⁵⁹ and R ⁶⁰ are each independently hydrogen, -C1-C6 alkyl, -C1-C6 alkylene-R ^64A , -C ₂ -C ₆ alkenyl, -C ₂ -C ₆ alkynyl, -C ₃ -C ₆ cycloalkyl, -C ₅ -C ₈ cycloalkenyl, 3-10 membered heterocycloalkyl, -C6-C10 aryl, 5-10 membered heteroaryl, -C1-C6 alkoxy, or -C1-C6 haloalkyl, wherein each alkyl, alkylene, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, heterocycloalkyl, aryl, heteroaryl and alkoxy is optionally substituted with one or more R64; and R61, R61A, R64 and R64A are each independently -OH, halogen, -CN, -C ₁ -C ₆ alkyl, -C ₁ - C6 alkoxy, -C1-C6 haloalkyl, or phenyl. In some embodiments, R11 is independently -C 12A 1-C6 alkylene-R , -C3-C6 cycloalkyl, - C ₅ -C ₈ cycloalkenyl, 3-10 membered heterocycloalkyl, -C ₆ -C ₁₀ aryl, or 5-10 membered heteroaryl, wherein each alkylene, cycloalkyl, cycloalkenyl, heterocycloalkyl, aryl or heteroaryl is optionally substituted with one or more R12; R12 and R12A are each independently -C -C alkyl 16A 1 6 , -C1-C6 alkylene-R , -C3-C6 cycloalkyl, -C ₅ -C ₈ cycloalkenyl, 3-10 membered heterocycloalkyl, -C ₆ -C ₁₀ aryl, 5-10 membered heteroaryl, -C -C alkoxy, -C -C haloalkyl, hal 13 13 1 6 1 6 ogen, cyano, oxo, -OR , -CO2R , or -NR14R15, wherein each alkyl, alkylene, cycloalkyl, cycloalkenyl, heterocycloalkyl, aryl, heteroaryl and alkoxy is optionally substituted with one or more R16; R13, R14 and R15 are each independently hydrogen or -C ₁ -C ₆ alkyl; and R16 and R16A are each independently -C1-C6 alkyl; R51 and R52 are each independently hydrogen, -C 53A 1-C6 alkyl, -C1-C6 alkylene-R , -C3- C ₆ cycloalkyl, -C ₅ -C ₈ cycloalkenyl, 3-10 membered heterocycloalkyl, -C ₆ -C ₁₀ aryl, or 5-10 membered heteroaryl, wherein each alkyl, alkylene, cycloalkyl, cycloalkenyl, heterocycloalkyl, aryl or heteroaryl is optionally substituted with one or more R53; or R51 and R52, together with the nitrogen atom to which they are attached, combine to form a 3-15 membered heterocycloalkyl or 5-15 membered heteroaryl, wherein the heterocycloalkyl or heteroaryl are optionally substituted with one or more R53; R53 and R53A are each independently -C -C alkyl, -C -C alkyl 57A 1 6 1 6 ene-R , -C2-C6 alkenyl, -C ₂ -C ₆ alkynyl, -C ₃ -C ₆ cycloalkyl, -C ₅ -C ₈ cycloalkenyl, 3-10 membered heterocycloalkyl, -C ₆ - C10 aryl, 5-10 membered heteroaryl, -C1-C6 alkoxy, -C1-C6 haloalkyl, halogen, cyano, oxo, - OR54, -C(O)R54, -CO ₂ R54, or -NR55R56, wherein each alkyl, alkylene, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, heterocycloalkyl, aryl, heteroaryl and alkoxy is optionally substituted with one or more R57; R54, R55 and R56 are each independently hydrogen, -C 61A 1-C6 alkyl, -C1-C6 alkylene-R , -C ₃ -C ₆ cycloalkyl, -C ₅ -C ₈ cycloalkenyl, 3-10 membered heterocycloalkyl, -C ₆ -C ₁₀ aryl, 5-10 membered heteroaryl, -C ₁ -C ₆ alkoxy, -C ₁ -C ₆ haloalkyl, -CO ₂ R58, -S(O) ₂ (C ₆ -C ₁₀ aryl), - S(O)2(C1-C6 alkyl), or -S(O)2NR ⁵⁹ R ⁶⁰ , wherein each alkyl, alkylene, cycloalkyl, cycloalkenyl, heterocycloalkyl, aryl, heteroaryl and alkoxy is optionally substituted with one or more R61; R57 and R57A are each independently -C1-C6 alkyl, -C1-C6 alkylene-R61A, -C2-C6 alkenyl, -C ₂ -C ₆ alkynyl, -C ₃ -C ₆ cycloalkyl, -C ₅ -C ₈ cycloalkenyl, 3-10 membered heterocycloalkyl, -C ₆ - C10 aryl, 5-10 membered heteroaryl, -C1-C6 alkoxy, -C1-C6 haloalkyl, halogen, cyano, oxo, - OR58, NR59R60, -S(O) ₂ (C ₁ -C ₆ alkyl), or -S(O) ₂ NR59R60, wherein each alkyl, alkylene, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, heterocycloalkyl, aryl, heteroaryl and alkoxy is optionally substituted with one or more R61; R58, R59 and R60 are each independently hydrogen, -C ₁ -C ₆ alkyl, -C ₁ -C ₆ alkylene-R64A, -C ₂ -C ₆ alkenyl, -C ₂ -C ₆ alkynyl, -C ₃ -C ₆ cycloalkyl, -C ₅ -C ₈ cycloalkenyl, 3-10 membered heterocycloalkyl, -C6-C10 aryl, 5-10 membered heteroaryl, -C1-C6 alkoxy, or -C1-C6 haloalkyl, wherein each alkyl, alkylene, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, heterocycloalkyl, aryl, heteroaryl and alkoxy is optionally substituted with one or more R ⁶⁴ ; and R61, R61A, R64 and R64A are each independently -C1-C6 alkyl or phenyl. In one embodiment, R11 is independently -C ₁ -C ₆ alkylene-R12A, -C ₅ -C ₆ cycloalkyl, -C ₅ - C6 cycloalkenyl, 3-10 membered heterocycloalkyl, -C6-C10 aryl, or 5-10 membered heteroaryl, wherein each alkylene, cycloalkyl, cycloalkenyl, heterocycloalkyl, aryl or heteroaryl is optionally substituted with one or more R12; R12 is independently -C ₁ -C ₆ alkyl, -C ₁ -C ₆ alkylene-R16A, -C ₅ -C ₆ cycloalkyl, -C ₅ -C ₆ cycloalkenyl, 3-10 membered heterocycloalkyl, -C6-C10 aryl, 5-10 membered heteroaryl, -C1- C alkoxy, 13 13 14 15 2 -C1-C2 haloalkyl, halogen, cyano, oxo, -OR , -CO2R , or -NR R , wherein each alkyl, alkylene, cycloalkyl, cycloalkenyl, heterocycloalkyl, aryl, heteroaryl and alkoxy is optionally substituted with one or more R ¹⁶ ; R12A is independently -C ₁ -C ₆ alkylene-R16A, -C ₅ -C ₆ cycloalkyl, -C ₅ -C ₆ cycloalkenyl, 3- 10 membered heterocycloalkyl, -C6-C10 aryl, 5-10 membered heteroaryl, -C1-C2 haloalkyl,10 halogen, cyano, oxo, -OR13, -CO ₂ R13, or -NR14R15, wherein each alkyl, alkylene, cycloalkyl, cycloalkenyl, heterocycloalkyl, aryl and heteroaryl is optionally substituted with one or more R16; R ¹³ , R ¹⁴ and R ¹⁵ are each independently hydrogen or -C ₁ -C ₄ alkyl; and R16 and R16A are each independently -C ₁ -C ₄ alkyl; 15 R51 and R52 are each independently hydrogen, -C 53A 1-C6 alkyl, -C1-C6 alkylene-R , -C3- C ₆ cycloalkyl, -C ₅ -C ₈ cycloalkenyl, 3-10 membered heterocycloalkyl, -C ₆ -C ₁₀ aryl, or 5-10 membered heteroaryl, wherein each alkyl, alkylene, cycloalkyl, cycloalkenyl, heterocycloalkyl, aryl or heteroaryl is optionally substituted with one or more R ⁵³ ; or R ⁵¹ and R ⁵² , together with the nitrogen atom to which they are attached, combine to form a 3-15 membered heterocycloalkyl or 5-15 membered heteroaryl, wherein the heterocycloalkyl or heteroaryl are optionally substituted with one or more R53; R53 is independently -C -C alkyl, -C -C al 57A 1 6 1 6 kylene-R , -C2-C6 alkenyl, -C2-C6 alkynyl, -C ₃ -C ₆ cycloalkyl, -C ₅ -C ₈ cycloalkenyl, 3-10 membered heterocycloalkyl, -C ₆ -C ₁₀ aryl, 5-10 membered heteroaryl, -C1-C6 alkoxy, -C1-C6 haloalkyl, halogen, cyano, oxo, -OR ⁵⁴ , -C(O)R ⁵⁴ ,25 -CO2R54, or -NR55R56, wherein each alkyl, alkylene, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, heterocycloalkyl, aryl, heteroaryl and alkoxy is optionally substituted with one or more R57; R53A is independently -C ₁ -C ₆ alkylene-R57A, -C ₅ -C ₆ cycloalkyl, -C ₅ -C ₆ cycloalkenyl, 3- 10 membered heterocycloalkyl, -C6-C10 aryl, 5-10 membered heteroaryl, -C1-C6 alkoxy, -C1-C2 haloalkyl, halogen, cyano, oxo, -OR54, -CO R54, o 55 56 2 r -NR R , wherein eachalkylene, cycloalkyl, cycloalkenyl, heterocycloalkyl, aryl, heteroaryl and alkoxy is optionally substituted with one or more R57; R54, R55 and R56 are each independently hydrogen, -C ₁ -C ₆ alkyl, -C ₁ -C ₆ alkylene-R61A, -C5-C6 cycloalkyl, 3-8 membered heterocycloalkyl, -C6-C10 aryl, 5-6 membered heteroaryl, -C1 haloalkyl, -CO2R58, -S(O)2(C6-C10 aryl),, wherein each alkyl, alkylene, cycloalkyl, heterocycloalkyl, aryl or heteroaryl is optionally substituted with one or more R61; R57 is independently -C ₁ -C ₆ alkyl, -C ₁ -C ₆ alkylene-R61A, -C ₂ -C ₆ alkenyl, -C ₂ -C ₆ alkynyl, -C3-C6 cycloalkyl, -C5-C8 cycloalkenyl, 3-10 membered heterocycloalkyl, -C6-C10 aryl, 5-10 membered heteroaryl, -C -C alkoxy, -C -C haloalkyl, hal 58 59 60 1 6 1 6 ogen, cyano, oxo, -OR , NR R , - S(O)2(C1-C6 alkyl), or -S(O)2NR59R60, wherein each alkyl, alkylene, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, heterocycloalkyl, aryl, heteroaryl and alkoxy is optionally substituted with one or more R61; R57A is independently -C 61A 1-C6 alkyl, -C1-C6 alkylene-R , -C2-C6 alkenyl, -C2-C6 alkynyl, -C ₃ -C ₆ cycloalkyl, -C ₅ -C ₈ cycloalkenyl, 3-10 membered heterocycloalkyl, -C ₆ -C ₁₀ aryl, 5-10 membered heteroaryl, -C -C alkoxy, -C -C haloalkyl, halogen, cyano, oxo, 58 1 6 1 6 -OR , NR59R60, -S(O) ₂ (C ₁ -C ₆ alkyl), or -S(O) ₂ NR59R60, wherein each alkyl, alkylene, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, heterocycloalkyl, aryl, heteroaryl and alkoxy is optionally substituted with one or more R61; 15 R58, R59 and R60 are each independently hydrogen, -C 64A 1-C6 alkyl, -C1-C6 alkylene-R , -C ₃ -C ₆ cycloalkyl, 3-10 membered heterocycloalkyl, -C ₆ -C ₁₀ aryl, 5-10 membered heteroaryl, -C ₁ -C ₆ alkoxy, or -C ₁ -C ₆ haloalkyl, wherein each alkyl, alkylene, cycloalkyl, cycloalkenyl, heterocycloalkyl, aryl, heteroaryl and alkoxy is optionally substituted with one or more R ⁶⁴ ; and 20 R61, R61A, R64 and R64A are each independently -C1-C6 alkyl or phenyl. In some embodiments, R11 is independently -C ₁ -C ₆ alkylene-R12A, -C ₅ -C ₆ cycloalkyl, - C5-C6 cycloalkenyl, 3-8 membered heterocycloalkyl, phenyl, or 5-6 membered heteroaryl, wherein each alkylene, cycloalkyl, cycloalkenyl, heterocycloalkyl, aryl or heteroaryl is optionally substituted with one or more R ¹² ; 25 R12 is independently -C 16A 1-C6 alkyl, -C1-C6 alkylene-R , -C5-C6 cycloalkyl, -C5-C6 cycloalkenyl, 3-8 membered heterocycloalkyl, phenyl, 5-6 membered heteroaryl, -C ₁ haloalkyl, halogen, cyano, oxo, -OR13, -CO ₂ R13, or -NR14R15, wherein each alkyl, alkylene, cycloalkyl, cycloalkenyl, heterocycloalkyl, phenyl and heteroaryl is optionally substituted with one or more R16; 30 R ^12A is independently -C ₅ -C ₆ cycloalkyl, -C ₅ -C ₆ cycloalkenyl, 3-8 membered heterocycloalkyl, phenyl, 5-6 membered heteroaryl, -C halo 13 1 alkyl, halogen, cyano, oxo, -OR , -CO ₂ R13, or -NR14R15, wherein each cycloalkyl, cycloalkenyl, heterocycloalkyl, phenyl and heteroaryl is optionally substituted with one or more R16; R13, R14 and R15 are each independently hydrogen or -C ₁ -C ₄ alkyl; and R ¹⁶ and R ^16A are each independently -C1-C4 alkyl;

R ⁵¹ and R ⁵² are each independently hydrogen, -Ci-Ce alkyl, -Ci-Ce alkylene-R ^53A , -C5- Ce cycloalkyl, -C5-C6 cycloalkenyl, 3-8 membered heterocycloalkyl, phenyl, or 5-6 membered heteroaryl, wherein each alkyl, alkylene, cycloalkyl, cycloalkenyl, heterocycloalkyl, phenyl or heteroaryl is optionally substituted with one or more R ⁵³ ; or R ⁵¹ and R ⁵² , together with the nitrogen atom to which they are attached, combine to form a 3-8 membered heterocycloalkyl or 5-6 membered heteroaryl, wherein the heterocycloalkyl or heteroaryl are optionally substituted with one or more R ⁵³ ;

R ⁵³ is independently -Ci-Ce alkyl, -Ci-Ce alkylene-R ^57A , -Cs-Ce cycloalkyl, -C5-C6 cycloalkenyl, 3-8 membered heterocycloalkyl, phenyl, 5-6 membered heteroaryl, -C1-C2 alkoxy, -C1-C2 haloalkyl, halogen, cyano, oxo, -OR ⁵⁴ , -C(O)R ⁵⁴ , -CO2R ⁵⁴ , or -NR ⁵⁵ R ⁵⁶ , wherein each alkyl, alkylene, cycloalkyl, cycloalkenyl, heterocycloalkyl, aryl, heteroaryl and alkoxy is optionally substituted with one or more R ⁵⁷ ;

R ^53A is independently -Ci-Ce alkylene-R ^57A , -C5-C6 cycloalkyl, 3-8 membered heterocycloalkyl, phenyl, 5-6 membered heteroaryl, -C1-C4 alkoxy, -C1-C2 haloalkyl, halogen, cyano, oxo, -OR ⁵⁴ , -CO2R ⁵⁴ , or -NR ⁵⁵ R ⁵⁶ , wherein each alkylene, cycloalkyl, heterocycloalkyl, aryl, heteroaryl and alkoxy is optionally substituted with one or more R ⁵⁷ ;

R ⁵⁴ , R ⁵⁵ and R ⁵⁶ are each independently hydrogen, -Ci-Ce alkyl, -Ci-Ce alkyl ene-R ^61A , -C5-C6 cycloalkyl, 3-6 membered heterocycloalkyl, -Ce-Cio aryl, 5-6 membered heteroaryl, -Ci haloalkyl, -CO2R ⁵⁸ , -S(O) ₂ (C ₆ -C 10 aryl), wherein each alkyl, alkylene, cycloalkyl, heterocycloalkyl, aryl or heteroaryl is optionally substituted with one or more R ⁶¹ ;

R ⁵⁷ is independently -Ci-Ce alkyl, -Ci-Ce alkylene-R ^61A , -Cs-Ce cycloalkyl, 3-8 membered heterocycloalkyl, phenyl, 5-6 membered heteroaryl, -C1-C2 alkoxy, -C1-C2 haloalkyl, halogen, cyano, oxo, -OR ⁵⁸ , NR ⁵⁹ R ⁶⁰ , -S(O)2(Ci-Ce alkyl), or -S(O)2NR ⁵⁹ R ⁶⁰ , wherein each alkyl, alkylene, cycloalkyl, heterocycloalkyl, phenyl, heteroaryl and alkoxy is optionally substituted with one or more R ⁶¹ ;

R ^57A is independently -Ci-Ce alkyl, -Ci-Ce alkylene-R ^61A , -Cs-Ce cycloalkyl, 3-10 membered heterocycloalkyl, phenyl, 5-6 membered heteroaryl, -C1-C2 alkoxy, -C1-C2 haloalkyl, halogen, cyano, oxo, -OR ⁵⁸ , NR ⁵⁹ R ⁶⁰ , -S(O)2(Ci-Ce alkyl), or -S(O)2NR ⁵⁹ R ⁶⁰ , wherein each alkyl, alkylene, cycloalkyl, heterocycloalkyl, phenyl, heteroaryl and alkoxy is optionally substituted with one or more R ⁶¹ ;

R ⁵⁸ , R ⁵⁹ and R ⁶⁰ are each independently hydrogen, -Ci-Ce alkyl, -Ci-Ce alkyl ene-R ^64A , -Cs-Ce cycloalkyl, 5-6 membered heterocycloalkyl, phenyl, 5-6 membered heteroaryl, -C1-C2 alkoxy or -C1-C2 haloalkyl, wherein each alkyl, alkylene, cycloalkyl, heterocycloalkyl, phenyl, heteroaryl and alkoxy is optionally substituted with one or more R ⁶⁴ ; and

R6i, R ^61A , R ⁶⁴ and R ^64A are each independently -Ci-Ce alkyl or phenyl.

In one embodiment, R ¹¹ is independently -Ci-Ce alkylene-R ^12A , -C5-C6 cycloalkyl, 3-6 membered heterocycloalkyl, phenyl, or 5-6 membered heteroaryl, wherein each alkylene, cycloalkyl, cycloalkenyl, heterocycloalkyl, aryl or heteroaryl is optionally substituted with one or more R ¹² ;

R ¹² is independently -Ci-Ce alkyl, -Ci-Ce alkylene-R ^16A , -C5-C6 cycloalkyl, 3-6 membered heterocycloalkyl, phenyl, 5-6 membered heteroaryl, -Ci haloalkyl, halogen, cyano, oxo, -OR ¹³ , -CO2R ¹³ , or -NR ¹⁴ R ¹⁵ , wherein each alkyl, alkylene, cycloalkyl, heterocycloalkyl, phenyl and heteroaryl is optionally substituted with one or more R ¹⁶ ;

R ^12A is independently -C5-C6 cycloalkyl, 3-6 membered heterocycloalkyl, phenyl, 5-6 membered heteroaryl, -Ci haloalkyl, halogen, cyano, oxo, -OR ¹³ , -CO2R ¹³ , or -NR ¹⁴ R ¹⁵ , wherein each cycloalkyl, heterocycloalkyl, phenyl and heteroaryl is optionally substituted with one or more R ¹⁶ ;

R ¹³ , R ¹⁴ and R ¹⁵ are each independently hydrogen or -C1-C4 alkyl; and

R ¹⁶ and R ^16A are each independently -C1-C4 alkyl;

R ⁵¹ and R ⁵² are each independently hydrogen, -Ci-Ce alkyl, -Ci-Ce alkylene-R ^53A , -C5- Ce cycloalkyl, 3-8 membered heterocycloalkyl, phenyl, or 5-6 membered heteroaryl, wherein each alkyl, alkylene, cycloalkyl, heterocycloalkyl, phenyl or heteroaryl is optionally substituted with one or more R ⁵³ ; or R ⁵¹ and R ⁵² , together with the nitrogen atom to which they are attached, combine to form a 3-8 membered heterocycloalkyl or 5-6 membered heteroaryl, wherein the heterocycloalkyl or heteroaryl are optionally substituted with one or more R ⁵³ ;

R ⁵³ is independently -Ci-Ce alkyl, -Ci-Ce alkylene-R ^57A , -Cs-Ce cycloalkyl, 3-8 membered heterocycloalkyl, phenyl, 5-6 membered heteroaryl, -C1-C2 alkoxy, -C1-C2 haloalkyl, halogen, cyano, oxo, -OR ⁵⁴ , -C(O)R ⁵⁴ , -CO2R ⁵⁴ , or -NR ⁵⁵ R ⁵⁶ , wherein each alkyl, alkylene, cycloalkyl, heterocycloalkyl, phenyl, heteroaryl and alkoxy is optionally substituted with one or more R ⁵⁷ ;

R ^53A is independently -Ci-Ce alkylene-R ^57A , -C5-C6 cycloalkyl, 3-8 membered heterocycloalkyl, phenyl, 5-6 membered heteroaryl, -C1-C4 alkoxy, -C1-C2 haloalkyl, halogen, cyano, oxo, -OR ⁵⁴ , -CO2R ⁵⁴ , or -NR ⁵⁵ R ⁵⁶ , wherein each alkylene, cycloalkyl, heterocycloalkyl, aryl, heteroaryl and alkoxy is optionally substituted with one or more R ⁵⁷ ;

R ⁵⁴ , R ⁵⁵ and R ⁵⁶ are each independently hydrogen, -Ci-Ce alkyl, -Ci-Ce alkyl ene-R ^61A , -C5-C6 cycloalkyl, 3-6 membered heterocycloalkyl, phenyl, 5-6 membered heteroaryl, -Ci haloalkyl, -CO2R ⁵⁸ , -S(0)2(Ce-Cio aryl), wherein each alkyl, alkylene, cycloalkyl, heterocycloalkyl, phenyl or heteroaryl is optionally substituted with one or more R ⁶¹ ;

R ⁵⁷ is independently -Ci-Ce alkyl, -Ci-Ce alkylene-R ^61A , -Cs-Ce cycloalkyl, 5-6 membered heterocycloalkyl, phenyl, 5-6 membered heteroaryl, -C1-C2 alkoxy, -C1-C2 haloalkyl, halogen, cyano, oxo, -OR ⁵⁸ , NR ⁵⁹ R ⁶⁰ , -S(O)2(Ci-Ce alkyl), or -S(O)2NR ⁵⁹ R ⁶⁰ , wherein each alkyl, alkylene, cycloalkyl, heterocycloalkyl, phenyl, heteroaryl and alkoxy is optionally substituted with one or more R ⁶¹ ;

R ^57A is independently -Ci-Ce alkyl, -Ci-Ce alkylene-R ^61A , -Cs-Ce cycloalkyl, 3-8 membered heterocycloalkyl, phenyl, 5-6 membered heteroaryl, -C1-C2 alkoxy, -C1-C2 haloalkyl, halogen, cyano, oxo, -OR ⁵⁸ , NR ⁵⁹ R ⁶⁰ , wherein each alkyl, alkylene, cycloalkyl, heterocycloalkyl, phenyl, heteroaryl and alkoxy is optionally substituted with one or more R ⁶¹ ;

R ⁵⁸ , R ⁵⁹ and R ⁶⁰ are each independently hydrogen, -Ci-Ce alkyl, -Cs-Ce cycloalkyl, 5-6 membered heterocycloalkyl, phenyl, 5-6 membered heteroaryl, -C1-C2 alkoxy or -C1-C2 haloalkyl, wherein each alkyl, alkylene, cycloalkyl, heterocycloalkyl, phenyl, heteroaryl and alkoxy is optionally substituted with one or more R ⁶⁴ ; and

R6i, R ^61A , R ⁶⁴ and R ^64A are each independently -Ci-Ce alkyl or phenyl.

In some embodiments, R ¹¹ is independently -Ci-Ce alkylene-R ^12A , -C5-C6 cycloalkyl, 3- 6 membered heterocycloalkyl, phenyl, or 5-6 membered heteroaryl, wherein each alkylene, cycloalkyl, heterocycloalkyl, phenyl or heteroaryl is optionally substituted with one or more R ¹² ;

R ¹² is independently -Ci-Ce alkyl, -Ci haloalkyl, halogen, cyano, oxo, -OR ¹³ , -CO2R ¹³ , or -NR ¹⁴ R ¹⁵ ;

R ^12A is independently -C5-C6 cycloalkyl, 5-6 membered heterocycloalkyl, phenyl, 5-6 membered heteroaryl, -OR ¹³ , -CO2R ¹³ , or -NR ¹⁴ R ¹⁵ , wherein each cycloalkyl, heterocycloalkyl, phenyl or heteroaryl is optionally substituted with one or more R ¹⁶ ;

R ¹³ , R ¹⁴ and R ¹⁵ are each independently hydrogen or -C1-C4 alkyl; and

R ¹⁶ is -C1-C4 alkyl;

R ⁵¹ and R ⁵² are each independently hydrogen, -Ci-Ce alkyl, -Ci-Ce alkylene-R ^53A , -C5- Ce cycloalkyl, 3-8 membered heterocycloalkyl, phenyl, or 5-6 membered heteroaryl, wherein preferably at least one of R ⁵¹ and R ⁵² is hydrogen, wherein each alkyl, alkylene, cycloalkyl, heterocycloalkyl, phenyl or heteroaryl is optionally substituted with one or more R ⁵³ ; or R ⁵¹ and R ⁵² , together with the nitrogen atom to which they are attached, combine to form a 3-8 membered heterocycloalkyl or 5-6 membered heteroaryl, wherein the heterocycloalkyl or heteroaryl are optionally substituted with one or more R ⁵³ ; R ⁵³ is independently -Ci-Ce alkyl, -Ci-Ce alkylene-R ^57A , -Cs-Ce cycloalkyl, 3-8 membered heterocycloalkyl, phenyl, 5-6 membered heteroaryl, -C1-C2 alkoxy, -C1-C2 haloalkyl, halogen, cyano, oxo, -OR ⁵⁴ , -C(O)R ⁵⁴ , -CO2R ⁵⁴ , or -NR ⁵⁵ R ⁵⁶ , wherein each alkyl, alkylene, cycloalkyl, heterocycloalkyl, phenyl, heteroaryl and alkoxy is optionally substituted with one or more R ⁵⁷ ;

R ^53A is independently -Ci-Ce alkylene-R ^57A , -C5-C6 cycloalkyl, 3-6 membered heterocycloalkyl, phenyl, 5-6 membered heteroaryl, -C1-C4 alkoxy, -C1-C2 haloalkyl, halogen, cyano, oxo, -OR ⁵⁴ , -CO2R ⁵⁴ , or -NR ⁵⁵ R ⁵⁶ , wherein each alkylene, cycloalkyl, heterocycloalkyl, aryl, heteroaryl and alkoxy is optionally substituted with one or more R ⁵⁷ ;

R ⁵⁴ , R ⁵⁵ and R ⁵⁶ are each independently hydrogen, -Ci-Ce alkyl, -Ci-Ce alkyl ene-R ^61A , -C5-C6 cycloalkyl, 3-6 membered heterocycloalkyl, phenyl, 5-6 membered heteroaryl, -Ci haloalkyl, -CO2R ⁵⁸ , -S(0)2(Ce-Cio aryl), wherein each alkyl, alkylene, cycloalkyl, heterocycloalkyl, phenyl or heteroaryl is optionally substituted with one or more R ⁶¹ ;

R ⁵⁷ is independently -Ci-Ce alkyl, -Ci-Ce alkylene-R ^61A , -Cs-Ce cycloalkyl, 5-6 membered heterocycloalkyl, phenyl, 5-6 membered heteroaryl, -C1-C2 alkoxy, -C1-C2 haloalkyl, halogen, cyano, oxo, -OR ⁵⁸ , NR ⁵⁹ R ⁶⁰ , -S(O)2(Ci-Ce alkyl), or -S(O)2NR ⁵⁹ R ⁶⁰ , wherein each alkyl, alkylene, cycloalkyl, heterocycloalkyl, phenyl, heteroaryl and alkoxy is optionally substituted with one or more R ⁶¹ ;

R ^57A is independently -Ci-Ce alkyl, -Cs-Ce cycloalkyl, 3-6 membered heterocycloalkyl, phenyl, 5-6 membered heteroaryl, -C1-C2 alkoxy, -C1-C2 haloalkyl, halogen, cyano, oxo, -OR ⁵⁸ , NR ⁵⁹ R ⁶⁰ , wherein each alkyl, cycloalkyl, heterocycloalkyl, phenyl, heteroaryl and alkoxy is optionally substituted with one or more R ⁶¹ ;

R ⁵⁸ , R ⁵⁹ and R ⁶⁰ are each independently hydrogen, -Ci-Ce alkyl, -Cs-Ce cycloalkyl, phenyl, wherein each alkyl, cycloalkyl and phenyl is optionally substituted with one or more R ⁶⁴ ; and

R6i, R ^61A and R ⁶⁴ are each independently -Ci-Ce alkyl or phenyl.

In one embodiment, R ¹¹ is independently -Ci-Ce alkylene-R ^12A , -C5-C6 cycloalkyl, 5-6 membered heterocycloalkyl, or phenyl, wherein each alkylene, cycloalkyl, heterocycloalkyl or phenyl is optionally substituted with one or more R ¹² ;

R ¹² is independently -Ci-Ce alkyl, -Ci haloalkyl, oxo, -OR ¹³ , -CO2R ¹³ , or -NR ¹⁴ R ¹⁵ ;

R ^12A is independently -C5-C6 cycloalkyl, 5-6 membered heterocycloalkyl, phenyl, - OR ¹³ , -CO2R ¹³ , or -NR ¹⁴ R ¹⁵ , wherein each cycloalkyl, heterocycloalkyl or phenyl is optionally substituted with one or more R ¹⁶ ;

R ¹³ , R ¹⁴ and R ¹⁵ are each independently hydrogen or -C1-C4 alkyl; and R ¹⁶ is -C1-C4 alkyl;

R ⁵¹ and R ⁵² are each independently hydrogen, -Ci-Ce alkyl, -Ci-Ce alkylene-R ^53A , -C5- Ce cycloalkyl, 3-8 membered heterocycloalkyl or phenyl, wherein preferably at least one of R ⁵¹ and R ⁵² is hydrogen, wherein each alkyl, alkylene, cycloalkyl, heterocycloalkyl or phenyl is optionally substituted with one or more R ⁵³ ; or R ⁵¹ and R ⁵² , together with the nitrogen atom to which they are attached, combine to form a 3-6 membered heterocycloalkyl or 5-6 membered heteroaryl, wherein the heterocycloalkyl or heteroaryl are optionally substituted with one or more R ⁵³ ;

R ⁵³ is independently -Ci-Ce alkyl, -Ci-Ce alkylene-R ^57A , -Cs-Ce cycloalkyl, 3-8 membered heterocycloalkyl or phenyl, -C1-C2 alkoxy, -C1-C2 haloalkyl, halogen, cyano, oxo, - OR ⁵⁴ , -C(O)R ⁵⁴ , -CO2R ⁵⁴ , or -NR ⁵⁵ R ⁵⁶ , wherein each alkyl, alkylene, cycloalkyl, heterocycloalkyl, phenyl and alkoxy is optionally substituted with one or more R ⁵⁷ ;

R ^53A is independently -Ci-Ce alkylene-R ^57A , -C5-C6 cycloalkyl, 3-6 membered heterocycloalkyl, phenyl, 5-6 membered heteroaryl, -C1-C4 alkoxy, -C1-C2 haloalkyl, halogen, cyano, oxo, -OR ⁵⁴ , -CO2R ⁵⁴ , or -NR ⁵⁵ R ⁵⁶ , wherein each alkylene, cycloalkyl, heterocycloalkyl, phenyl, heteroaryl and alkoxy is optionally substituted with one or more R ⁵⁷ ;

R ⁵⁴ , R ⁵⁵ and R ⁵⁶ are each independently hydrogen, -Ci-Ce alkyl, -Ci-Ce alkyl ene-R ^61A , -C5-C6 cycloalkyl, 3-6 membered heterocycloalkyl, phenyl, -Ci haloalkyl, -CO2R ⁵⁸ , -S(O)2(Ce- C10 aryl), wherein each alkyl, alkylene, cycloalkyl, heterocycloalkyl and phenyl is optionally substituted with one or more R ⁶¹ ;

R ⁵⁷ is independently -Ci-Ce alkyl, -Ci-Ce alkylene-R ^61A , -Cs-Ce cycloalkyl, 5-6 membered heterocycloalkyl, phenyl, -C1-C2 alkoxy, -C1-C2 haloalkyl, halogen, cyano, oxo, - OR ⁵⁸ , NR ⁵⁹ R ⁶⁰ , -S(O) ₂ (CI-C ₆ alkyl), or -S(O)2NR ⁵⁹ R ⁶⁰ , wherein each alkyl, alkylene, cycloalkyl, heterocycloalkyl, phenyl and alkoxy is optionally substituted with one or more R ⁶¹ ;

R ^57A is independently -Ci-Ce alkyl, -Cs-Ce cycloalkyl, 3-6 membered heterocycloalkyl, phenyl, -C1-C2 alkoxy, -C1-C2 haloalkyl, halogen, cyano, oxo, -OR ⁵⁸ , NR ⁵⁹ R ⁶⁰ , wherein each alkyl, cycloalkyl, heterocycloalkyl, phenyl and alkoxy is optionally substituted with one or more R ⁶¹ ;

R ⁵⁸ , R ⁵⁹ and R ⁶⁰ are each independently hydrogen, -Ci-Ce alkyl, -Cs-Ce cycloalkyl, phenyl, wherein each alkyl, cycloalkyl and phenyl is optionally substituted with one or more R ⁶⁴ ; and

R ⁶ !, R ^61A and R ⁶⁴ are each independently -Ci-Ce alkyl or phenyl. In some embodiments, R ¹¹ is independently -Ci-Ce alkylene-R ^12A , -Cs-Ce cycloalkyl, 5- 6 membered heterocycloalkyl, or phenyl, wherein each alkylene, cycloalkyl, heterocycloalkyl or phenyl is optionally substituted with one or more R ¹² ;

R ¹² is independently -C1-C2 alkyl;

R ^12A is independently -C5-C6 cycloalkyl, 5-6 membered heterocycloalkyl, phenyl, - OR ¹³ , -CO2R ¹³ , or -NR ¹⁴ R ¹⁵ , wherein each cycloalkyl, heterocycloalkyl or phenyl is optionally substituted with one or more R ¹⁶ ;

R ¹³ , R ¹⁴ and R ¹⁵ are each independently hydrogen or -C1-C2 alkyl; and

R ¹⁶ is -C1-C2 alkyl;

R ⁵¹ and R ⁵² are each independently hydrogen, -Ci-Ce alkyl, -Ci-Ce alkylene-R ^53A , -Cs- Ce cycloalkyl, 5-6 membered heterocycloalkyl or phenyl, wherein preferably at least one of R ⁵¹ and R ⁵² is hydrogen, wherein each alkyl, alkylene, cycloalkyl, heterocycloalkyl or phenyl is optionally substituted with one or more R ⁵³ ; or R ⁵¹ and R ⁵² , together with the nitrogen atom to which they are attached, combine to form a 5-6 membered heterocycloalkyl, wherein the heterocycloalkyl is optionally substituted with one or more R ⁵³ ;

R ⁵³ is independently -Ci-Ce alkyl, -Ci-Ce alkylene-R ^57A , -Cs-Ce cycloalkyl, 3-6 membered heterocycloalkyl or phenyl, -Ci alkoxy, -Ci haloalkyl, halogen, cyano, oxo, -OR ⁵⁴ , -C(O)R ⁵⁴ , -CO2R ⁵⁴ , or -NR ⁵⁵ R ⁵⁶ , wherein each alkyl, alkylene, cycloalkyl, heterocycloalkyl and phenyl is optionally substituted with one or more R ⁵⁷ ;

R ^53A is independently -C1-C4 alkylene-R ^57A , -Cs-Ce cycloalkyl, 3-6 membered heterocycloalkyl, phenyl, -C1-C4 alkoxy, -Ci haloalkyl, halogen, cyano, oxo, -OR ⁵⁴ , -CO2R ⁵⁴ , or -NR ⁵⁵ R ⁵⁶ , wherein each alkylene, cycloalkyl, heterocycloalkyl and phenyl is optionally substituted with one or more R ⁵⁷ ;

R ⁵⁴ , R ⁵⁵ and R ⁵⁶ are each independently hydrogen, -Ci-Ce alkyl, -Ci-Ce alkyl ene-R ^61A , -Cs-Ce cycloalkyl, 3-6 membered heterocycloalkyl, phenyl, -Ci haloalkyl, -CO2R ⁵⁸ , -S(O)2(Ce- C10 aryl), wherein each alkyl, alkylene, cycloalkyl, heterocycloalkyl and phenyl is optionally substituted with one or more R ⁶¹ ;

R ⁵⁷ is independently -Ci-Ce alkyl, -C1-C2 alkylene-R ^61A , -Ci alkoxy, -Ci haloalkyl, halogen, cyano, oxo, -OR ⁵⁸ , NR ⁵⁹ R ⁶⁰ , -S(O)2(Ci-C2 alkyl), or -S(O)2NR ⁵⁹ R ⁶⁰ , wherein each alkyl and alkylene is optionally substituted with one or more R ⁶¹ ;

R ^57A is independently -Ci-Ce alkyl, -Cs-Ce cycloalkyl, 3-6 membered heterocycloalkyl, phenyl, -Ci alkoxy, -Ci haloalkyl, -OR ⁵⁸ , NR ⁵⁹ R ⁶⁰ , wherein each alkyl, cycloalkyl, heterocycloalkyl and phenyl is optionally substituted with one or more R ⁶¹ ; R58, R59 and R60 are each independently hydrogen, -C1-C4 alkyl and phenyl, wherein each alkyl and phenyl is optionally substituted with one or more R64; wherein R64 is independently -C ₁ -C ₆ alkyl; and R61 and R61A are each independently -C1-C6 alkyl or phenyl. In one embodiment, R11 is independently -C 12A 1-C6 alkylene-R or 5-6 membered heterocycloalkyl, wherein each alkylene and heterocycloalkyl is optionally substituted with one or more R ¹² ; R12 is independently -C ₁ -C ₂ alkyl; R12A is independently 5-6 membered heterocycloalkyl, phenyl, -OR13, -CO 13 2R , or - NR14R15, wherein each heterocycloalkyl or phenyl is optionally substituted with one or more R16; R13, R14 and R15 are each independently hydrogen or -C ₁ -C ₂ alkyl; and R ¹⁶ is -C ₁ -C ₂ alkyl; R51 and R52 are each independently hydrogen, -C ₁ -C ₆ alkyl, -C ₁ -C ₆ alkylene-R53A, -C ₅ - C cycloalkyl, 51 6 5-6 membered heterocycloalkyl or phenyl, wherein preferably at least one of R and R52 is hydrogen, wherein each alkyl, alkylene, cycloalkyl, heterocycloalkyl or phenyl is optionally substituted with one or more R53; or R51 and R52, together with the nitrogen atom to which they are attached, combine to form a 5-6 membered heterocycloalkyl, wherein the heterocycloalkyl is optionally substituted with one or more R53; R53 is independently -C 57A 1-C6 alkyl, -C1-C6 alkylene-R , -C3-C6 cycloalkyl, 3-6 membered heterocycloalkyl or phenyl, oxo, -OR54, -C(O)R54, -CO ₂ R54, or -NR55R56, wherein each alkyl, alkylene, cycloalkyl, heterocycloalkyl and phenyl is optionally substituted with one or more R57; R ^53A is independently -C5-C6 cycloalkyl, 3-6 membered heterocycloalkyl, phenyl, -C1- C4 alkoxy, oxo, -CO2R54, or -NR55R56, wherein each cycloalkyl, heterocycloalkyl and phenyl is optionally substituted with one or more R57; R54, R55 and R56 are each independently hydrogen, -C ₁ -C ₆ alkyl, -C ₁ -C ₆ alkylene-R61A, -C -C cycloalkyl, 3-6 membered heterocycloalky 58 5 6 l, phenyl, -CO2R , -S(O)2(phenyl), wherein each alkyl, alkylene, cycloalkyl, heterocycloalkyl and phenyl is optionally substituted with one or more R ⁶¹ ; R57 is independently -C -C alkyl, -C -C alkylen 61A 58 59 60 1 6 1 2 e-R , oxo, -OR , NR R , - S(O) ₂ (C ₁ -C ₂ alkyl), or -S(O) ₂ NR59R60, wherein each alkyl and alkylene is optionally substituted with one or more R61; R57A is independently -C1-C4 alkyl, -C5-C6 cycloalkyl, 3-6 membered heterocycloalkyl, phenyl, -C1 alkoxy, -C1 haloalkyl, -OR58, NR59R60, wherein each alkyl, cycloalkyl, heterocycloalkyl and phenyl is optionally substituted with one or more R61; R58, R59 and R60 are each independently hydrogen, -C1-C4 alkyl and phenyl, wherein each alkyl and phenyl is optionally substituted with one or more R64; wherein R64 is independently -C1-C6 alkyl; and R ⁶¹ and R ^61A are each independently -C1-C4 alkyl or phenyl. In some embodiments, R11 is independently -C ₁ -C ₄ alkylene-R12A or 5-6 membered heterocycloalkyl, wherein each alkylene or heterocycloalkyl is optionally substituted with one or more R12; R12 is independently -C1-C2 alkyl; R12A is independently 5-6 membered heterocycloalkyl, phenyl, -OR13, -CO ₂ R13, or - NR ¹⁴ R ¹⁵ , wherein each heterocycloalkyl or phenyl is optionally substituted with one or more R16; R13, R14 and R15 are each independently hydrogen or -C1-C2 alkyl; and R16 is -C ₁ -C ₂ alkyl; R51 and R52 are each independently hydrogen, -C ₁ -C ₆ alkyl, -C ₁ -C ₆ alkylene-R53A, -C ₅ - C cycloalkyl, 5-6 membered heterocyclo 51 6 alkyl or phenyl, wherein preferably at least one of R and R52 is hydrogen, wherein each alkyl, alkylene, cycloalkyl, heterocycloalkyl or phenyl is optionally substituted with one or more R53; or R51 and R52, together with the nitrogen atom to which they are attached, combine to form a 5-6 membered heterocycloalkyl, wherein the heterocycloalkyl is optionally substituted with one or more R53; R53 is independently -C ₁ -C ₆ alkyl, -C ₁ -C ₆ alkylene-R57A, -C ₃ -C ₆ cycloalkyl, 5-6 membered heterocycloalkyl or phenyl, oxo, -OR ⁵⁴ , -C(O)R ⁵⁴ , -CO2R ⁵⁴ , or -NR ⁵⁵ R ⁵⁶ , wherein each alkyl, alkylene, cycloalkyl, heterocycloalkyl and phenyl is optionally substituted with one or more R57; R53A is independently -C ₅ -C ₆ cycloalkyl, 5-6 membered heterocycloalkyl, phenyl, -C ₁ - C4 alkoxy, oxo, -CO2R54, or -NR55R56, wherein each cycloalkyl, heterocycloalkyl and phenyl is optionally substituted with one or more R57; R ⁵⁴ , R ⁵⁵ and R ⁵⁶ are each independently hydrogen, -C ₁ -C ₆ alkyl, -C ₁ -C ₆ alkylene-R ^61A , phenyl, -CO2R58, -S(O)2(phenyl), wherein each alkyl, alkylene and phenyl is optionally substituted with one or more R61; R57 is independently -C 59 60 1-C6 alkyl, oxo, NR R , -S(O)2(C1-C2 alkyl), or - S(O) ₂ NR59R60, wherein each alkyl and alkylene is optionally substituted with one or more R61; R ^57A is independently -C1-C4 alkyl, -C5-C6 cycloalkyl, 3-6 membered heterocycloalkyl, phenyl, -OR ⁵⁸ , NR ⁵⁹ R ⁶⁰ , wherein each alkyl, cycloalkyl, heterocycloalkyl and phenyl is optionally substituted with one or more R ⁶¹ ;

R ⁵⁸ , R ⁵⁹ and R ⁶⁰ are each independently hydrogen and -C1-C2 alkyl; and

R ⁶¹ and R ^61A are each independently -C1-C2 alkyl or phenyl.

In one embodiment, R ¹¹ is independently -C1-C4 alkylene-R ^12A or 5-6 membered heterocycloalkyl, wherein each alkylene or heterocycloalkyl is optionally substituted with one or more R ¹² ;

R ¹² is independently -C1-C2 alkyl;

R ^12A is independently 5-6 membered heterocycloalkyl, phenyl, -CO2R ¹³ , or -NR ¹⁴ R ¹⁵ , wherein each heterocycloalkyl or phenyl is optionally substituted with one or more R ¹⁶ ; and wherein said 5-6 membered heterocycloalkyl does not comprise heteroatoms other than O and N, and wherein preferably said 5-6 membered heterocycloalkyl contains 1 to 4 heteroatoms, preferably 1 to 3, further preferably one or two heteroatoms selected from O and N, and wherein again further preferably said 5-6 membered heterocycloalkyl is selected from pyrrolidine, piperidine, piperazine or morpholine;

R ¹³ , R ¹⁴ and R ¹⁵ are each independently hydrogen or -C1-C2 alkyl; and

R ¹⁶ is -C1-C2 alkyl;

R ⁵¹ and R ⁵² are each independently hydrogen, -Ci-Ce alkyl, -C1-C4 alkylene-R ^53A , -C5- Ce cycloalkyl, 5-6 membered heterocycloalkyl or phenyl, wherein preferably at least one of R ⁵¹ and R ⁵² is hydrogen, wherein each cycloalkyl, heterocycloalkyl or phenyl is optionally substituted with one or more R ⁵³ ; or R ⁵¹ and R ⁵² , together with the nitrogen atom to which they are attached, combine to form a 5-6 membered heterocycloalkyl, wherein the heterocycloalkyl is optionally substituted with one or more R ⁵³ ;

R ⁵³ is independently -C1-C4 alkyl, -C1-C4 alkylene-R ^57A , -C5-C6 cycloalkyl, 5-6 membered heterocycloalkyl or phenyl, -OR ⁵⁴ , -C(O)R ⁵⁴ , -CO2R ⁵⁴ , or -NR ⁵⁵ R ⁵⁶ , wherein each alkyl, alkylene, cycloalkyl, heterocycloalkyl and phenyl is optionally substituted with one or more R ⁵⁷ ;

R ^53A is independently -C5-C6 cycloalkyl, 5-6 membered heterocycloalkyl, phenyl, -Ci- C4 alkoxy, -CO2R ⁵⁴ , or -NR ⁵⁵ R ⁵⁶ , wherein each cycloalkyl, heterocycloalkyl and phenyl is optionally substituted with one or more R ⁵⁷ ;

R ⁵⁴ , R ⁵⁵ and R ⁵⁶ are each independently hydrogen, -C1-C4 alkyl, -C1-C4 alkyl ene-R ^61A , phenyl, -CO2R ⁵⁸ , -S(O)2(phenyl), wherein phenyl is optionally substituted with one or more R ⁶¹ ; R ⁵⁷ is independently -C1-C4 alkyl, oxo, NR ⁵⁹ R ⁶⁰ , -S(O)2(Ci-C2 alkyl), or - S(O) ₂ NR ⁵⁹ R ⁶⁰ ;

R ^57A is independently -C1-C4 alkyl, -C5-C6 cycloalkyl, 5-6 membered heterocycloalkyl, phenyl, wherein each cycloalkyl, heterocycloalkyl and phenyl is optionally substituted with one or more R ⁶¹ ;

R ⁵⁸ , R ⁵⁹ and R ⁶⁰ are each independently hydrogen or -C1-C2 alkyl;

R ⁶¹ is independently -C1-C2 alkyl; and

R ^61A is independently phenyl.

In one embodiment, R ¹¹ is independently -C1-C4 alkylene-R ^12A or 5-6 membered heterocycloalkyl, wherein each alkylene or heterocycloalkyl is optionally substituted with one or more R ¹² ;

R ¹² is independently -C1-C2 alkyl;

R ^12A is independently 5-6 membered heterocycloalkyl, phenyl, -CO2R ¹³ , or -NR ¹⁴ R ¹⁵ , wherein each heterocycloalkyl or phenyl is optionally substituted with one or more R ¹⁶ ; and wherein said 5-6 membered heterocycloalkyl contains 1 to 4 heteroatoms, preferably 1 to 3, further preferably one or two heteroatoms selected from O and N, and wherein again further preferably said 5-6 membered heterocycloalkyl is selected from pyrrolidine, piperidine, piperazine or morpholine;

R ¹³ , R ¹⁴ and R ¹⁵ are each independently hydrogen or -C1-C2 alkyl; and

R ¹⁶ is -C1-C2 alkyl;

R ⁵¹ and R ⁵² are each independently hydrogen, -C1-C4 alkyl, -C1-C4 alkylene-R ^53A , -C5- Ce cycloalkyl, 5-6 membered heterocycloalkyl or phenyl, wherein preferably at least one of R ⁵¹ and R ⁵² is hydrogen, wherein each cycloalkyl, heterocycloalkyl or phenyl is optionally substituted with one or more R ⁵³ ; or R ⁵¹ and R ⁵² , together with the nitrogen atom to which they are attached, combine to form a 5-6 membered heterocycloalkyl, wherein the heterocycloalkyl is optionally substituted with one or more R ⁵³ ;

R ⁵³ is independently -C1-C4 alkyl, -C1-C3 alkylene-R ^57A , -C5-C6 cycloalkyl, 5-6 membered heterocycloalkyl or phenyl, -OR ⁵⁴ , -C(O)R ⁵⁴ , -CO2R ⁵⁴ , or -NR ⁵⁵ R ⁵⁶ , wherein each cycloalkyl, heterocycloalkyl and phenyl is optionally substituted with one or more R ⁵⁷ ;

R ^53A is independently -C5-C6 cycloalkyl, 5-6 membered heterocycloalkyl, phenyl, -Ci- C2 alkoxy, -CO2R ⁵⁴ , or -NR ⁵⁵ R ⁵⁶ , wherein each cycloalkyl, heterocycloalkyl and phenyl is optionally substituted with one or more R ⁵⁷ ; R ⁵⁴ , R ⁵⁵ and R ⁵⁶ are each independently hydrogen, -C1-C2 alkyl, -C1-C2 alkyl ene-R ^61A , phenyl, -CO2R ⁵⁸ , -S(O)2(phenyl), wherein phenyl is optionally substituted with one or more R ⁶¹ ;

R ⁵⁷ is independently -C1-C2 alkyl, oxo, NR ⁵⁹ R ⁶⁰ , or -S(O)2NR ⁵⁹ R ⁶⁰ ;

R ^57A is independently -C1-C2 alkyl, -C5-C6 cycloalkyl, 5-6 membered heterocycloalkyl, phenyl, wherein each cycloalkyl, heterocycloalkyl and phenyl is optionally substituted with one or more R ⁶¹ ;

R ⁵⁸ , R ⁵⁹ and R ⁶⁰ are each independently hydrogen or -C1-C2 alkyl;

R ⁶¹ is independently -C1-C2 alkyl;

R ^61A is independently phenyl; and wherein said 5-6 membered heterocycloalkyl contains 1 to 4 heteroatoms, preferably 1 to 3, further preferably one or two heteroatoms, selected from O and N, and wherein again further preferably said 5-6 membered heterocycloalkyl is selected from pyrrolidine, piperidine, piperazine or morpholine.

In one embodiment, R ¹¹ is independently -C1-C4 alkylene-R ^12A or 5-6 membered heterocycloalkyl, wherein each alkylene or heterocycloalkyl is optionally substituted with one or more R ¹² ;

R ¹² is independently -C1-C2 alkyl;

R ^12A is independently 5-6 membered heterocycloalkyl, phenyl, -CO2R ¹³ , or -NR ¹⁴ R ¹⁵ , wherein each heterocycloalkyl or phenyl is optionally substituted with one or more R ¹⁶ ; and wherein said 5-6 membered heterocycloalkyl contains one or two heteroatoms selected from O and N, and wherein preferably said 5-6 membered heterocycloalkyl is selected from pyrrolidine, piperidine, piperazine or morpholine;

R ¹³ , R ¹⁴ and R ¹⁵ are each independently hydrogen or -C1-C2 alkyl; and

R ¹⁶ is -C1-C2 alkyl;

R ⁵¹ and R ⁵² are each independently hydrogen, -C1-C4 alkyl, -C1-C4 alkylene-R ^53A , -C5- Ce cycloalkyl, 5-6 membered heterocycloalkyl or phenyl, wherein preferably at least one of R ⁵¹ and R ⁵² is hydrogen, wherein each cycloalkyl, heterocycloalkyl or phenyl is optionally substituted with one or more R ⁵³ ; or R ⁵¹ and R ⁵² , together with the nitrogen atom to which they are attached, combine to form a 5-6 membered heterocycloalkyl, wherein the heterocycloalkyl is optionally substituted with one or more R ⁵³ ;

R ⁵³ is independently -C1-C4 alkyl, -C1-C3 alkylene-R ^57A , -C5-C6 cycloalkyl, 5-6 membered heterocycloalkyl or phenyl, -OR ⁵⁴ , -C(O)R ⁵⁴ , -CO2R ⁵⁴ , or -NR ⁵⁵ R ⁵⁶ , wherein each cycloalkyl, heterocycloalkyl and phenyl is optionally substituted with one or more R ⁵⁷ ; R53A is independently -C5-C6 cycloalkyl, 5-6 membered heterocycloalkyl, phenyl, -C1- C2 alkoxy, -CO2R54, or -NR55R56, wherein each cycloalkyl, heterocycloalkyl and phenyl is optionally substituted with one or more R57; R54, R55 and R56 are each independently hydrogen, -C - 61A 1 C2 alkyl, -C1-C2 alkylene-R , phenyl, -CO2R58, -S(O)2(phenyl), wherein phenyl is optionally substituted with one or more R61; R ⁵⁷ is independently -C1-C2 alkyl, oxo, NR ⁵⁹ R ⁶⁰ , or -S(O)2NR ⁵⁹ R ⁶⁰ ; R57A is independently -C ₁ -C ₂ alkyl, 5-6 membered heterocycloalkyl, wherein each heterocycloalkyl is optionally substituted with one or more R61; R58, R59 and R60 are each independently hydrogen or -C ₁ -C ₂ alkyl; R61is independently -C1-C2 alkyl; R61A is independently phenyl; and wherein said 5-6 membered heterocycloalkyl contains 1 to 4 heteroatoms, preferably 1 to 3, further preferably one or two heteroatoms, selected from O and N, and wherein again further preferably said 5-6 membered heterocycloalkyl is selected from pyrrolidine, piperidine, piperazine or morpholine. In one embodiment, R11 is independently -C ₁ -C ₄ alkylene-R12A or 5-6 membered heterocycloalkyl, wherein each alkylene or heterocycloalkyl is optionally substituted with one or more R12; R12 is independently -C1-C2 alkyl; R12A is independently 5-6 membered heterocycloalkyl, phenyl, -CO ₂ R13, or -NR14R15, wherein each heterocycloalkyl or phenyl is optionally substituted with one or more R16; and wherein said 5-6 membered heterocycloalkyl is selected from pyrrolidine, piperidine, piperazine or morpholine, and wherein preferably said 5-6 membered heterocycloalkyl is pyrrolidine; R13, R14 and R15 are each independently hydrogen or -C ₁ -C ₂ alkyl; and R16 is -C ₁ -C ₂ alkyl; R51 and R52 are each independently hydrogen, -C 53A 1-C4 alkyl, -C1-C4 alkylene-R , -C5- C cycloalkyl, 5-6 membered heterocycloalkyl or phenyl, where 51 6 in preferably at least one of R and R ⁵² is hydrogen, wherein each cycloalkyl, heterocycloalkyl or phenyl is optionally substituted with one or more R53; or R51 and R52, together with the nitrogen atom to which they are attached, combine to form a 5-6 membered heterocycloalkyl, wherein the heterocycloalkyl is optionally substituted with one or more R53; R ⁵³ is independently -C1-C4 alkyl, -C1-C3 alkylene-R ^57A , -C5-C6 cycloalkyl, 5-6 membered heterocycloalkyl or phenyl, -OR ⁵⁴ , -C(O)R ⁵⁴ , -CO2R ⁵⁴ , or -NR ⁵⁵ R ⁵⁶ , wherein each cycloalkyl, heterocycloalkyl and phenyl is optionally substituted with one or more R ⁵⁷ ;

R ^53A is independently -C5-C6 cycloalkyl, 5-6 membered heterocycloalkyl, phenyl, -Ci- C2 alkoxy, -CO2R ⁵⁴ , or -NR ⁵⁵ R ⁵⁶ , wherein each cycloalkyl, heterocycloalkyl and phenyl is optionally substituted with one or more R ⁵⁷ ;

R ⁵⁴ , R ⁵⁵ and R ⁵⁶ are each independently hydrogen, -C1-C2 alkyl, -C1-C2 alkyl ene-R ^61A , phenyl, -CO2R ⁵⁸ , -S(O)2(phenyl), wherein phenyl is optionally substituted with one or more R ⁶¹ ;

R ⁵⁷ is independently -C1-C2 alkyl, oxo, NR ⁵⁹ R ⁶⁰ , or -S(O)2NR ⁵⁹ R ⁶⁰ ;

R ^57A is independently -C1-C2 alkyl, 5-6 membered heterocycloalkyl, wherein each heterocycloalkyl is optionally substituted with one or more R ⁶¹ ;

R ⁵⁸ , R ⁵⁹ and R ⁶⁰ are each independently hydrogen or -C1-C2 alkyl;

R ⁶¹ is independently -C1-C2 alkyl;

R ^61A is independently phenyl; and wherein said 5-6 membered heterocycloalkyl contains 1 to 4 heteroatoms, preferably 1 to 3, further preferably one or two heteroatoms, selected from O and N, and wherein again further preferably said 5-6 membered heterocycloalkyl is selected from pyrrolidine, piperidine, piperazine or morpholine.

In one aspect, the present invention provides a compound of the Formula I or a pharmaceutically acceptable salt, tautomer, solvate, hydrate or enantiomer thereof: wherein: Y1 is (CR1R2)n, wherein n is an integer from 1 to 6 and R1 and R2 are independently, at each occurrence, selected from the group consisting of hydrogen, -C1-C6 alkyl, and -C1-C6 alkoxy, wherein each alkyl is optionally substituted with one or more halogen or -C ₃ -C ₆ cycloalkyl, and wherein each cycloalkyl is further optionally substituted with one or more halogen; X ¹ is -OR ¹¹ or -NR ⁵¹ R ^{^ ^} ; R11 is independently -C ₁ -C ₆ alkyl, -C ₃ -C ₆ cycloalkyl, -C ₁ -C ₆ alkylene-C ₃ -C ₆ cycloalkyl, 3-10 membered heterocycloalkyl, -C1-C6 alkylene-3-10 membered heterocycloalkyl, -C6-C10 aryl, -C ₁ -C ₆ alkylene-C ₆ -C ₁₀ aryl, 5-10 membered heteroaryl, or -C ₁ -C ₆ alkylene-5-10 membered heteroaryl; wherein each alkyl, cycloalkyl, heterocycloalkyl, aryl or heteroaryl is optionally substituted with one or more R ¹² ; R12 is independently -C ₁ -C ₆ alkyl, -C ₁ -C ₆ alkoxy, -C ₁ -C ₆ haloalkyl, halogen, cyano, oxo, -OR13, -CO 13 14 15 2R , or -NR R ; R13, R14 and R15 are each independently hydrogen, -C ₁ -C ₆ alkyl, or -C ₆ -C ₁₀ aryl; R51 and R52 are each independently hydrogen, -C1-C6 alkyl, -C3-C6 cycloalkyl, -C1-C6 alkylene-C ₃ -C ₆ cycloalkyl, 3-10 membered heterocycloalkyl, -C ₁ -C ₆ alkylene-3-10 membered heterocycloalkyl, -C6-C10 aryl, -C1-C6 alkylene-C6-C10 aryl, 5-10 membered heteroaryl, or -C1- C ₆ alkylene-5-10 membered heteroaryl; wherein each alkyl, cycloalkyl, heterocycloalkyl, aryl or heteroaryl is optionally substituted with one or more R53; or R51 and R52, together with the nitrogen atom to which they are attached, combine to form a 3-15 membered heterocycloalkyl or 5-15 membered heteroaryl, wherein the heterocycloalkyl or heteroaryl are optionally substituted with one or more R ⁷³ ; R53 is independently -C ₁ -C ₆ alkyl, -C ₃ -C ₆ cycloalkyl, -C ₁ -C ₆ alkylene-C ₃ -C ₆ cycloalkyl, -C6-C10 aryl, -C1-C6 alkylene-C6-C10 aryl, 3-10 membered heterocycloalkyl, -C1-C6 alkylene- 3-10 membered heterocycloalkyl, 5-10 membered heteroaryl, -C ₁ -C ₆ alkylene-5-10 membered heteroaryl, -C -C alkoxy, -C -C haloa 54 54 54 1 6 1 6 lkyl, halogen, cyano, oxo, -OR , -C(O)R , -CO2R , or -NR55R56, wherein each alkyl, cycloalkyl, heterocycloalkyl, aryl, and heteroaryl is optionally substituted with one or more R ⁵⁷ ; R54 is independently hydrogen or -C ₁ -C ₆ alkyl; 30 R55 and R56 are each independently hydrogen, -C1-C6 alkyl, -C3-C6 cycloalkyl, 3-10 membered heterocycloalkyl, -C ₆ -C ₁₀ aryl, 5-10 membered heteroaryl, -C ₁ -C ₆ haloalkyl, - CO2C1-C6 alkyl, -S(O)2(C1-C6 alkyl), or -S(O)2(C6-C10 aryl), wherein each alkyl is optionally substituted with one or more phenyl; R ⁵⁷ is -C ₁ -C ₆ alkyl; R73 is independently selected from -C1-C6 alkyl, -C3-C6 cycloalkyl, -C1-C6 alkylene-C3- C6 cycloalkyl, -C6-C10 aryl, -C1-C6 alkylene-C6-C10 aryl, 3-10 membered heterocycloalkyl, -C1- C ₆ alkylene-3-10 membered heterocycloalkyl, 5-10 membered heteroaryl, -C ₁ -C ₆ alkylene-5- 10 membered heteroaryl, -NR75R76, -OR74, or oxo; wherein each alkylene is optionally substituted with one or more oxo or -OH; wherein each alkyl, cycloalkyl, aryl, heterocycloalkyl, or heteroaryl is optionally substituted with one or more -C1-C6 alkyl, -C1-C6 haloalkyl, halogen, -NH2, -NH(C1-C6 alkyl), -N(C ₁ -C ₆ alkyl) ₂ , -OH, -OCH ₃ , -OCH ₂ CH ₂ OH, -SO ₂ NH ₂ , phenyl, or oxo; R75 and R76 are each independently -H, -C1-C6 alkyl, -CO2C1-C6 alkyl, -SO2phenyl, - C ₆ -C ₁₀ aryl, or 5- to 6-membered heteroaryl, wherein each -C ₆ -C ₁₀ aryl or 5- to 6-membered heteroaryl is optionally substituted with one or more -C1-C6 alkyl, halogen -OC1-C6 alkyl, or - CN; and R ⁷⁴ is independently -H, -C ₁ -C ₆ alkyl, -C ₆ -C ₁₀ aryl or -C ₅ -C ₆ cycloalkyl, wherein said cycloalkyl is optionally substituted by one or more -C ₁ -C ₆ alkyl. In some embodiments, R11 is selected from -C1-C4 alkyl, 5 to 6 membered heterocycloalkyl, or -C ₁ -C ₂ alkylene-5 to 6 membered heterocycloalkyl; wherein each alkyl is optionally substituted with one or more R12 and wherein each 5 to 6 membered heterocycloalkyl is optionally substituted with one or more -C1-C4 alkyl; wherein R12 is independently selected from phenyl, -CO ₂ R13, and -NR14R15; wherein R13, R14 and R15 are each independently -C1-C2 alkyl; R51 and R52 are each independently hydrogen, -C ₁ -C ₆ alkyl, -C ₃ -C ₆ cycloalkyl, -C ₁ - C6alkylene-C3-C6 cycloalkyl, 3 to 10 membered heterocycloalkyl, -C1-C6alkylene-3 to 10 membered heterocycloalkyl, -C ₆ -C ₁₀ aryl, or -C ₁ -C ₆ alkylene-C ₆ -C ₁₀ aryl; wherein each alkyl and cycloalkyl is optionally substituted with one or more R ⁵³ ; wherein each heterocycloalkyl is optionally substituted with one or more -C1-C6 alkyl or -C ₁ -C ₆ alkylene-phenyl; wherein each aryl is optionally substituted with one or more -C ₁ -C ₆ alkyl or -C ₁ - C6alkylene-5 to 6-membered heterocycloalkyl, and wherein said 5 to 6-membered heterocycloalkyl is optionally substituted with one or more -C1-C6 alkyl; R ⁵³ is independently -OR ⁵⁴ , -CO ₂ R ⁵⁴ , or -NR ⁵⁵ R ⁵⁶ ; R54 is -C1-C4 alkyl; and R55 and R56 are each independently -H, -C ₁ -C ₄ alkyl, phenyl, or -C ₁ -C ₆ alkylene-phenyl; or R51 and R52, together with the nitrogen atom to which they are attached, combine to form a 3-15 membered heterocycloalkyl, wherein said heterocycloalkyl is optionally fused to one or more additional aryl or heteroaryl rings or said heterocycloalkyl is optionally connected at a single atom to another cycloalkyl or heterocycloalkyl to form a 10- to 15-membered spirocyclic heterocycle, or said heterocycloalkyl optionally comprises a C2 bridging alkylene; and wherein said 3-15 membered heterocycloalkyl is optionally substituted with one or more, preferably one or two, R ⁷³ ; R73 is independently selected from -C ₁ -C ₆ alkyl, -C ₃ -C ₆ cycloalkyl, -C ₁ -C ₆ alkylene-C ₃ - C6 cycloalkyl, -C6-C10 aryl, -C1-C6 alkylene-C6-C10 aryl, 3-10 membered heterocycloalkyl, -C1- C ₆ alkylene-3-10 membered heterocycloalkyl, 5-10 membered heteroaryl, -C ₁ -C ₆ alkylene-5- 10 membered heteroaryl, -NR75R76, -OR74, or oxo; wherein each alkylene is optionally substituted with one or more oxo or -OH; wherein each alkyl, cycloalkyl, aryl, heterocycloalkyl, or heteroaryl is optionally substituted with one or more -C ₁ -C ₆ alkyl, -C ₁ -C ₆ haloalkyl, halogen, -NH ₂ , -NH(C ₁ -C ₆ alkyl), -N(C1-C6 alkyl)2, -OH, -OCH3, -OCH2CH2OH, -SO2NH2, phenyl, or oxo; R75 and R76 are each independently -H, -C ₁ -C ₆ alkyl, -CO ₂ C ₁ -C ₆ alkyl, -SO ₂ phenyl, - C ₆ -C ₁₀ aryl, or 5- to 6-membered heteroaryl, wherein each -C ₆ -C ₁₀ aryl or 5- to 6-membered heteroaryl is optionally substituted with one or more -C1-C6 alkyl, halogen -OC1-C6 alkyl, or - CN; and R74 is independently -H, -C1-C6 alkyl, -C6-C10 aryl or -C5-C6 cycloalkyl, wherein said cycloalkyl is optionally substituted by one or more -C ₁ -C ₆ alkyl. In some embodiments, R11 is selected from -C1-C4 alkyl, 5 to 6 membered heterocycloalkyl, or -C ₁ -C ₂ alkylene-5 to 6 membered heterocycloalkyl; wherein each alkyl is optionally substituted with one or more R ¹² and wherein each 5 to 6 membered heterocycloalkyl does not comprise heteroatoms other than O and N and wherein each 5 to 6 membered heterocycloalkyl is further optionally substituted with one or more -C ₁ -C ₂ alkyl; wherein R12 is independently selected from phenyl, -CO ₂ R13, and -NR14R15; wherein R13, R14 and R15 are each independently -C1-C2 alkyl; R51 and R52 are each independently hydrogen, -C1-C4 alkyl, -C3-C6 cycloalkyl, -C1- C ₄ alkylene-C ₃ -C ₆ cycloalkyl, 3 to 10 membered heterocycloalkyl, -C ₁ -C ₄ alkylene-3 to 10 membered heterocycloalkyl, -C6-C10 aryl, or -C1-C4alkylene-C6-C10 aryl; wherein each alkyl and cycloalkyl is optionally substituted with one or more R53; wherein each heterocycloalkyl is optionally substituted with one or more -C1-C6 alkyl or -C ₁ -C ₄ alkylene-phenyl; wherein each aryl is optionally substituted with one or more -C1-C6 alkyl or -C1- C4alkylene-5 to 6-membered heterocycloalkyl, and wherein said 5 to 6-membered heterocycloalkyl is optionally substituted with one or more -C ₁ -C ₄ alkyl; R53 is independently -OR54, -CO R54, or -NR55 56 2 R ; R54 is -C1-C4 alkyl; and R55 and R56 are each independently -H, -C1-C4 alkyl, phenyl, or -C1-C4alkylene-phenyl; or R51 and R52, together with the nitrogen atom to which they are attached, combine to form a 3-15 membered heterocycloalkyl, wherein said heterocycloalkyl is optionally fused to one or more additional aryl or heteroaryl rings or said heterocycloalkyl is optionally connected at a single atom to another cycloalkyl or heterocycloalkyl to form a 10- to 15-membered spirocyclic heterocycle, or said heterocycloalkyl optionally comprises a C ₂ bridging alkylene; and wherein said 3-15 membered heterocycloalkyl is optionally substituted with one or more, preferably one or two, R73; R73 is independently selected from -C1-C6 alkyl, -C3-C6 cycloalkyl, -C1-C6 alkylene-C3- C ₆ cycloalkyl, -C ₆ -C ₁₀ aryl, -C ₁ -C ₆ alkylene-C ₆ -C ₁₀ aryl, -C(O)-C ₆ -C ₁₀ aryl, 3-10 membered heterocycloalkyl, -C ₁ -C ₆ alkylene-3-10 membered heterocycloalkyl, 5-10 membered heteroaryl, -C1-C6 alkylene-5-10 membered heteroaryl, -CH(OH)-5-10 membered heteroaryl, - NR75R76, -OR74, or oxo; wherein said -C1-C6 alkyl is optionally substituted with one or more -NH2, -NH(C1-C6 alkyl), -N(C ₁ -C ₆ alkyl) ₂ , -OH, -OCH ₂ CH ₂ OH, or phenyl; wherein each aryl is optionally substituted with one or more -C1-C6 alkyl, -C1-C6 haloalkyl, phenyl, halogen, -OH, -OCH ₃ , or -SO ₂ NH ₂ ; wherein each heterocycloalkyl is optionally substituted with one or more -C1-C6 alkyl or oxo; wherein each heteroaryl is optionally substituted with one or more oxo, -C ₁ -C ₆ alkyl, - C ₁ -C ₆ haloalkyl, or halogen; R75 and R76 are each independently -H, -C1-C6 alkyl, -CO2C1-C6 alkyl, -SO2phenyl, - C6-C10 aryl, or 5- to 6-membered heteroaryl, wherein each -C6-C10 aryl or 5- to 6-membered heteroaryl is optionally substituted with one or more -C ₁ -C ₆ alkyl, halogen -OC ₁ -C ₆ alkyl, or - CN; and R74 is independently -H, -C ₆ -C ₁₀ aryl or -C ₅ -C ₆ cycloalkyl, wherein said cycloalkyl is optionally substituted by one or more -C1-C6 alkyl. In some embodiments, R11 is selected from -C1-C4 alkyl, 5 to 6 membered heterocycloalkyl, or -C1-C2alkylene-5 to 6 membered heterocycloalkyl; wherein each alkyl is optionally substituted with one or more R12, preferably with exactly one R12, and wherein each 5 to 6 membered heterocycloalkyl is selected from pyrrolidine, piperidine, piperazine, and morpholine, and wherein each 5 to 6 membered heterocycloalkyl is further optionally substituted with one or more -C1-C2 alkyl; wherein R ¹² is independently selected from phenyl, -CO2R ¹³ , and -NR ¹⁴ R ¹⁵ ; wherein R13, R14 and R15 are each independently -C ₁ -C ₂ alkyl; R51 and R52 are each independently hydrogen, -C1-C4 alkyl, -C5-C6 cycloalkyl, -C1- C ₄ alkylene-C ₅ -C ₆ cycloalkyl, 5 to 6 membered heterocycloalkyl, -C ₁ -C ₄ alkylene-5 to 6 membered heterocycloalkyl, -C6 aryl, or -C1-C4alkylene-C6 aryl; wherein each alkyl and cycloalkyl is optionally substituted with one or more R53; wherein each heterocycloalkyl is optionally substituted with one or more -C ₁ -C ₄ alkyl or -C ₁ -C ₄ alkylene-phenyl; wherein each -C6 aryl is optionally substituted with one or more -C1-C4 alkyl or -C1- C ₄ alkylene-5 to 6-membered heterocycloalkyl, and wherein said 5 to 6-membered heterocycloalkyl is optionally substituted with one or more -C ₁ -C ₄ alkyl; R ⁵³ is independently -OR ⁵⁴ , -CO2R ⁵⁴ , or -NR ⁵⁵ R ⁵⁶ ; R54 is -C ₁ -C ₄ alkyl; and R55 and R56 are each independently -H, -C1-C4 alkyl, phenyl, or -C1-C4alkylene-phenyl; or R51 and R52, together with the nitrogen atom to which they are attached, combine to form a 3-15 membered heterocycloalkyl, wherein said heterocycloalkyl is optionally fused to one or more additional aryl or heteroaryl rings or said heterocycloalkyl is optionally connected at a single atom to another cycloalkyl or heterocycloalkyl to form a 10- to 15-membered spirocyclic heterocycle, or said heterocycloalkyl optionally comprises a C ₂ bridging alkylene; and wherein said 3-15 membered heterocycloalkyl is optionally substituted with one or more, preferably one or two, R73; R73 is independently selected from -C1-C4 alkyl, -C3-C6 cycloalkyl, -C1-C4 alkylene-C3- C ₆ cycloalkyl, -C ₆ -C ₁₀ aryl, -C ₁ -C ₄ alkylene-C ₆ -C ₁₀ aryl, -C(O)-C ₆ -C ₁₀ aryl, 3-10 membered heterocycloalkyl, -C1-C4 alkylene-3-10 membered heterocycloalkyl, 5-10 membered heteroaryl, -C ₁ -C ₄ alkylene-5-10 membered heteroaryl, -CH(OH)-5-10 membered heteroaryl, - NR75R76, -OR74, or oxo; wherein said -C1-C4 alkyl is optionally substituted with one or more -NH2, -NH(C1-C4 alkyl), -N(C1-C4 alkyl)2, -OH, -OCH2CH2OH, or phenyl; wherein each aryl is optionally substituted with one or more -C ₁ -C ₄ alkyl, -C ₁ -C ₄ haloalkyl, phenyl, halogen, -OH, -OCH3, or -SO2NH2; wherein each heterocycloalkyl is optionally substituted with one or more -C1-C4 alkyl or oxo; wherein each heteroaryl is optionally substituted with one or more oxo, -C1-C4 alkyl, - C ₁ -C ₄ haloalkyl, or halogen; R75 and R76 are each independently -H, -C1-C4 alkyl, -CO2C1-C4 alkyl, -SO2phenyl, - C ₆ -C ₁₀ aryl, or 5- to 6-membered heteroaryl, wherein each -C ₆ -C ₁₀ aryl or 5- to 6-membered heteroaryl is optionally substituted with one or more -C1-C4 alkyl, halogen -OC1-C4 alkyl, or - CN; and R ⁷⁴ is independently -H, -C ₆ -C ₁₀ aryl or -C ₅ -C ₆ cycloalkyl, wherein said cycloalkyl is optionally substituted by one or more -C ₁ -C ₄ alkyl. In some embodiments, R11 is selected from -C1-C4 alkyl, 5 to 6 membered heterocycloalkyl, or -C ₁ -C ₂ alkylene-5 to 6 membered heterocycloalkyl; wherein each alkyl is optionally substituted with one or more R12, preferably with exactly one R12, and wherein each 5 to 6 membered heterocycloalkyl is selected from pyrrolidine and piperidine, and wherein each 5 to 6 membered heterocycloalkyl is further optionally substituted with one or more -C ₁ -C ₂ alkyl; wherein R12 is independently selected from phenyl, -CO ₂ R13, and -NR14R15; wherein R13, R14 and R15 are each independently -C1-C2 alkyl; R51 and R52 are each independently hydrogen, -C ₁ -C ₄ alkyl, -C ₅ -C ₆ cycloalkyl, -C ₁ - C3alkylene-C5-C6 cycloalkyl, 5 to 6 membered heterocycloalkyl, -C1-C3alkylene-5 to 6 membered heterocycloalkyl, -C6 aryl, or -C1-C3alkylene-C6 aryl; wherein each alkyl and cycloalkyl is optionally substituted with one or more R53; wherein each heterocycloalkyl is optionally substituted with one or more -C ₁ -C ₂ alkyl or -C1-C2alkylene-phenyl; wherein each -C6 aryl is optionally substituted with one or more -C1-C2 alkyl or -C1- C ₄ alkylene-5 to 6-membered heterocycloalkyl, and wherein said 5 to 6-membered heterocycloalkyl is optionally substituted with one or more -C1-C2 alkyl; R53 is independently -OR54, -CO ₂ R54, or -NR55R56; R54 is -C1-C2 alkyl; and R55 and R56 are each independently -H, -C1-C2 alkyl, phenyl, or -C1-C2alkylene-phenyl; or R51 and R52, together with the nitrogen atom to which they are attached, combine to form a 3-15 membered heterocycloalkyl, wherein said heterocycloalkyl is optionally fused to one or more additional aryl or heteroaryl rings or said heterocycloalkyl is optionally connected at a single atom to another cycloalkyl or heterocycloalkyl to form a 10- to 15-membered spirocyclic heterocycle, or said heterocycloalkyl optionally comprises a C2 bridging alkylene; and wherein said 3-15 membered heterocycloalkyl is optionally substituted with one or more, preferably one or two, R73; R73 is independently selected from -C ₁ -C ₄ alkyl, -C ₃ -C ₆ cycloalkyl, -C ₁ -C ₄ alkylene-C ₃ - C6 cycloalkyl, -C6-C10 aryl, -C1-C4 alkylene-C6-C10 aryl, -C(O)-C6-C10 aryl, 3-10 membered heterocycloalkyl, -C ₁ -C ₄ alkylene-3-10 membered heterocycloalkyl, 5-10 membered heteroaryl, -C ₁ -C ₄ alkylene-5-10 membered heteroaryl, -CH(OH)-5-10 membered heteroaryl, - NR75R76, -OR74, or oxo; wherein said -C1-C4 alkyl is optionally substituted with one or more -N(C1-C4 alkyl)2, - OH, -OCH ₂ CH ₂ OH, or phenyl; wherein each aryl is optionally substituted with one or more -C ₁ -C ₄ alkyl, -C ₁ -C ₄ haloalkyl, phenyl, halogen, -OCH3, or -SO2NH2; wherein each heterocycloalkyl is optionally substituted with one or more -C ₁ -C ₄ alkyl or oxo; wherein each heteroaryl is optionally substituted with one or more oxo, -C ₁ -C ₄ alkyl, - C1-C4 haloalkyl, or halogen; R75 and R76 are each independently -H, -C ₁ -C ₄ alkyl, -CO ₂ C ₁ -C ₄ alkyl, -SO ₂ phenyl, - C6-C10 aryl, or 5- to 6-membered heteroaryl, wherein each -C6-C10 aryl or 5- to 6-membered heteroaryl is optionally substituted with one or more -C1-C4 alkyl, halogen -OC1-C4 alkyl, or - CN; and R74 is independently -H, -C ₆ -C ₁₀ aryl or -C ₅ -C ₆ cycloalkyl, wherein said cycloalkyl is optionally substituted by one or more -C1-C4 alkyl. In some embodiments, R11 is selected from -C1-C4 alkyl, 5 to 6 membered heterocycloalkyl, -C ₁ -C ₂ alkylene-5 to 6 membered heterocycloalkyl, or -C ₁ -C ₂ alkylene-phenyl; wherein each alkyl is optionally substituted with one or more R12, preferably with exactly one R12, and wherein each 5 to 6 membered heterocycloalkyl is selected from pyrrolidine and piperidine, and wherein each 5 to 6 membered heterocycloalkyl is further optionally substituted with one or more -C ₁ -C ₂ alkyl; wherein R12 is independently selected from -CO 13 14 15 2R , and -NR R ; wherein R13, R14 and R15 are each independently -C1-C2 alkyl; R51 and R52 are each independently hydrogen, -C ₁ -C ₄ alkyl, -C ₅ -C ₆ cycloalkyl, -C ₁ - C3alkylene-C5-C6 cycloalkyl, 5 to 6 membered heterocycloalkyl, -C1-C3alkylene-5 to 6 membered heterocycloalkyl, -C6 aryl, or -C1-C3alkylene-C6 aryl; wherein each alkyl and cycloalkyl is optionally substituted with one or more R53; wherein each heterocycloalkyl is selected from pyrrolidine, piperidine, piperazine, and morpholine, and wherein each heterocycle is optionally substituted with one or more -C ₁ -C ₂ alkyl or -C1-C2alkylene-phenyl; wherein each -C ₆ aryl is optionally substituted with one or more -C ₁ -C ₂ alkyl or -C ₁ - C4alkylene-5 to 6-membered heterocycloalkyl, and wherein said 5 to 6-membered heterocycloalkyl is optionally substituted with one or more -C ₁ -C ₂ alkyl; R ⁵³ is independently -OR ⁵⁴ , -CO ₂ R ⁵⁴ , or -NR ⁵⁵ R ⁵⁶ ; R54 is -C ₁ -C ₂ alkyl; and R55 and R56 are each independently -H, -C1-C2 alkyl, phenyl, or -C1-C2alkylene-phenyl; or R51 and R52, together with the nitrogen atom to which they are attached, combine to form a 3-15 membered heterocycloalkyl, wherein said heterocycloalkyl is optionally fused to one or more additional aryl or heteroaryl rings or said heterocycloalkyl is optionally connected at a single atom to another cycloalkyl or heterocycloalkyl to form a 10- to 15-membered spirocyclic heterocycle, or said heterocycloalkyl optionally comprises a C ₂ bridging alkylene; and wherein said 3-15 membered heterocycloalkyl is optionally substituted with one or more, preferably one or two, R73; R ⁷³ is independently selected from -C1-C4 alkyl, -C3-C6 cycloalkyl, -C1-C3 alkylene-C3- C6 cycloalkyl, -C6-C10 aryl, -C1-C3 alkylene-C6-C10 aryl, -C(O)-C6-C10 aryl, 3-10 membered heterocycloalkyl, -C ₁ -C ₃ alkylene-3-10 membered heterocycloalkyl, 5-10 membered heteroaryl, -C ₁ -C ₃ alkylene-5-10 membered heteroaryl, -CH(OH)-5-10 membered heteroaryl, - NR75R76, -OR74, or oxo; wherein said -C1-C4 alkyl is optionally substituted with one or more -N(C1-C2 alkyl)2, - OH, -OCH ₂ CH ₂ OH, or phenyl; wherein each aryl is optionally substituted with one or more -C1-C2 alkyl, -C1-C2 haloalkyl, phenyl, halogen, -OCH ₃ , or -SO ₂ NH ₂ ; wherein each heterocycloalkyl is optionally substituted with one or more -C1-C2 alkyl or oxo; P6306PC00 – 45 – wherein each heteroaryl is optionally substituted with one or more oxo, -C1-C2 alkyl, - C1-C2 haloalkyl, or halogen; R75 and R76 are each independently -H, -C ₁ -C ₂ alkyl, -CO ₂ C ₁ -C ₄ alkyl, -SO ₂ phenyl, - C6-C10 aryl, or 5- to 6-membered heteroaryl, wherein each -C6-C10 aryl or 5- to 6-membered 5 heteroaryl is optionally substituted with one or more -C1-C2 alkyl, halogen -OC1-C2 alkyl, or - CN; and R ⁷⁴ is independently -H, -C6-C10 aryl or -C5-C6 cycloalkyl, wherein said cycloalkyl is optionally substituted by one or more -C ₁ -C ₂ alkyl. In some embodiments, R11 is selected from -C1-C4 alkyl, 5 to 6 membered 10 heterocycloalkyl, -C ₁ -C ₂ alkylene-5 to 6 membered heterocycloalkyl, or -C ₁ -C ₂ alkylene-phenyl; wherein each alkyl is optionally substituted with one or more R12, preferably with exactly one R12, and wherein each 5 to 6 membered heterocycloalkyl is selected from pyrrolidine and piperidine, and wherein each 5 to 6 membered heterocycloalkyl is further optionally substituted with one or more -C ₁ -C ₂ alkyl; 15 wherein R12 is independently selected from -CO R13, a 14 15 2 nd -NR R ; wherein R13, R14 and R15 are each independently -C ₁ -C ₂ alkyl; R51 and R52 are each independently hydrogen, -C ₁ -C ₄ alkyl, -C ₅ -C ₆ cycloalkyl, -C ₁ - C3alkylene-C5-C6 cycloalkyl, 5 to 6 membered heterocycloalkyl, -C1-C3alkylene-5 to 6 membered heterocycloalkyl, -C ₆ aryl, or -C ₁ -C ₃ alkylene-C ₆ aryl; 20 wherein each alkyl and cycloalkyl is optionally substituted with one or more R53; wherein each heterocycloalkyl is selected from pyrrolidine, piperidine, piperazine, and morpholine, and wherein each heterocycle is optionally substituted with one or more -C1-C2 alkyl or -C ₁ -C ₂ alkylene-phenyl; wherein each -C6 aryl is optionally substituted with one or more -C1-C2 alkyl or -C1- 25 C4alkylene-5 to 6-membered heterocycloalkyl, wherein said heterocycloalkyl is selected from pyrrolidine, piperidine, piperazine, and morpholine, and wherein said 5 to 6-membered heterocycloalkyl is optionally substituted with one or more -C ₁ -C ₂ alkyl; R53 is independently -OR54, -CO 54 55 56 2R , or -NR R ; R54 is -C1-C2 alkyl; and 30 R ⁵⁵ and R ⁵⁶ are each independently -H, -C ₁ -C ₂ alkyl, phenyl, or -C ₁ -C ₂ alkylene-phenyl; or R51 and R52, together with the nitrogen atom to which they are attached, combine to form a membered heterocycloalkyl, wherein said heterocycloalkyl is selected from azetidine, pyrrolidine, imidazolidine, piperidine, piperazine, morpholine, or 1,4-diazepane, wherein said P6306PC00 – 46 – azetidine, pyrrolidine, imidazolidine, piperidine, piperazine, morpholine, or 1,4-diazepane is optionally fused to one or more additional aryl or heteroaryl rings or said heterocycloalkyl is optionally connected at a single atom to another cycloalkyl or heterocycloalkyl to form a 10- to 15-membered spirocyclic heterocycle, or said heterocycle is piperidine optionally comprising 5 a C2 bridging alkylene; and wherein said heterocycloalkyl is further optionally substituted with one or more, preferably one or two, R73; R ⁷³ is independently selected from -C1-C4 alkyl, -C3-C6 cycloalkyl, -C1-C3 alkylene-C3- C ₆ cycloalkyl, -C ₆ -C ₁₀ aryl, -C ₁ -C ₃ alkylene-C ₆ -C ₁₀ aryl, -C(O)-C ₆ -C ₁₀ aryl, 3-10 membered heterocycloalkyl, -C1-C3 alkylene-3-10 membered heterocycloalkyl, 5-10 membered10 heteroaryl, -C ₁ -C ₃ alkylene-5-10 membered heteroaryl, -CH(OH)-5-10 membered heteroaryl, - NR75R76, -OR74, or oxo; wherein said -C ₁ -C ₄ alkyl is optionally substituted with one or more -N(C ₁ -C ₂ alkyl) ₂ , - OH, -OCH ₂ CH ₂ OH, or phenyl; wherein each aryl is optionally substituted with one or more -C ₁ -C ₂ alkyl, -CF ₃ , phenyl, 15 halogen, -OCH3, or -SO2NH2; wherein each heterocycloalkyl is optionally substituted with one or more -C ₁ -C ₂ alkyl or oxo; wherein each heteroaryl is optionally substituted with one or more oxo, -C1-C2 alkyl, - CF ₃ , or halogen; 20 R75 and R76 are each independently -H, -C1-C2 alkyl, -CO2C1-C4 alkyl, -SO2phenyl, - C ₆ -C ₁₀ aryl, or 5- to 6-membered heteroaryl, wherein each -C ₆ -C ₁₀ aryl or 5- to 6-membered heteroaryl is optionally substituted with one or more -C1-C2 alkyl, halogen -OC1-C2 alkyl, or - CN; and R ⁷⁴ is independently -H, -C6-C10 aryl or -C5-C6 cycloalkyl, wherein said cycloalkyl is25 optionally substituted by one or more -C1-C2 alkyl. In some embodiments, R11 is selected from -C ₁ -C ₄ alkyl, 5 to 6 membered heterocycloalkyl, -C ₁ -C ₂ alkylene-5 to 6 membered heterocycloalkyl, or -C ₁ -C ₂ alkylene-phenyl; wherein each alkyl is optionally substituted with one or more R12, preferably with exactly one R12, and wherein each 5 to 6 membered heterocycloalkyl is selected from pyrrolidine and 30 piperidine, and wherein each 5 to 6 membered heterocycloalkyl is further optionally substituted with one or more -C1-C2 alkyl; wherein R12 is independently selected from -CO ₂ R13, and -NR14R15; wherein R13, R14 and R15 are each independently -C1-C2 alkyl; P6306PC00 – 47 – R51 and R52 are each independently hydrogen, -C1-C4 alkyl, -C5-C6 cycloalkyl, -C1- C3alkylene-C5-C6 cycloalkyl, 5 to 6 membered heterocycloalkyl, -C1-C3alkylene-5 to 6 membered heterocycloalkyl, -C ₆ aryl, or -C ₁ -C ₃ alkylene-C ₆ aryl; wherein each alkyl and cycloalkyl is optionally substituted with one or more R53; 5 wherein each heterocycloalkyl is selected from pyrrolidine, piperidine, and piperazine, and wherein each heterocycle is optionally substituted with one or more -C1-C2 alkyl or -C1- C2alkylene-phenyl; wherein each -C ₆ aryl is optionally substituted with one or more -C ₁ -C ₂ alkyl or -C ₁ - C4alkylene-5 to 6-membered heterocycloalkyl, wherein said heterocycloalkyl is selected from 10 piperidine and piperazine, and wherein said 5 to 6-membered heterocycloalkyl is optionally substituted with one or more -C1-C2 alkyl; R53 is independently -OR54, -CO ₂ R54, or -NR55R56; R ⁵⁴ is -C ₁ -C ₂ alkyl; and R55 and R56 are each independently -H, -C ₁ -C ₂ alkyl, phenyl, or -C ₁ -C ₂ alkylene-phenyl; 15 or R51 and R52, together with the nitrogen atom to which they are attached, combine to form a membered heterocycloalkyl, wherein said heterocycloalkyl is selected from azetidine, pyrrolidine, imidazolidine, piperidine, piperazine, morpholine, or 1,4-diazepane, wherein said azetidine, pyrrolidine, imidazolidine, piperidine, piperazine, morpholine, or 1,4-diazepane is 20 optionally fused to one or more additional aryl or heteroaryl rings or said heterocycloalkyl is optionally connected at a single atom to another cycloalkyl or heterocycloalkyl to form a 10- to 15-membered spirocyclic heterocycle, or said heterocycle is piperidine optionally comprising a C ₂ bridging alkylene; and wherein said heterocycloalkyl is further optionally substituted with one or more, preferably one or two, R ⁷³ , and wherein when said heterocycloalkyl is azetidine, 25 said azetidine is substituted at the 3-position and when said heterocycloalkyl is piperidine or piperazine, said piperidine or piperazine is substituted at the 4-position; R73 is independently selected from -C ₁ -C ₄ alkyl, -C ₃ -C ₆ cycloalkyl, -C ₁ -C ₃ alkylene-C ₃ - C6 cycloalkyl, -C6-C10 aryl, -C1-C3 alkylene-C6-C10 aryl, -C(O)-C6-C10 aryl, 3-10 membered heterocycloalkyl, -C1-C3 alkylene-3-10 membered heterocycloalkyl, 5-10 membered30 heteroaryl, -C ₁ -C ₃ alkylene-5-10 membered heteroaryl, -CH(OH)-5-10 membered heteroaryl, - NR75R76, -OR74, or oxo; wherein said -C ₁ -C ₄ alkyl is optionally substituted with one or more -N(C ₁ -C ₂ alkyl) ₂ , - OH, -OCH2CH2OH, or phenyl; P6306PC00 – 48 – wherein each aryl is optionally substituted with one or more -C1-C2 alkyl, -CF3, phenyl, halogen, -OCH3, or -SO2NH2; wherein each heterocycloalkyl is optionally substituted with one or more -C ₁ -C ₂ alkyl or oxo; 5 wherein each heteroaryl is optionally substituted with one or more oxo, -C1-C2 alkyl, - CF3, or halogen; R ⁷⁵ and R ⁷⁶ are each independently -H, -C1-C2 alkyl, -CO2C1-C4 alkyl, -SO2phenyl, - C ₆ -C ₁₀ aryl, or 5- to 6-membered heteroaryl, wherein each -C ₆ -C ₁₀ aryl or 5- to 6-membered heteroaryl is optionally substituted with one or more -C1-C2 alkyl, halogen -OC1-C2 alkyl, or - 10 CN; and R74 is independently -H, -C6-C10 aryl or -C5-C6 cycloalkyl, wherein said cycloalkyl is optionally substituted by one or more -C ₁ -C ₂ alkyl. In some embodiments, R ¹¹ is selected from -C ₁ -C ₄ alkyl, 5 to 6 membered heterocycloalkyl, -C ₁ -C ₂ alkylene-5 to 6 membered heterocycloalkyl, or -C ₁ -C ₂ alkylene-phenyl; 15 wherein each alkyl is optionally substituted with one or more R12, preferably with exactly one R12, and wherein each 5 to 6 membered heterocycloalkyl is selected from pyrrolidine and piperidine, and wherein each 5 to 6 membered heterocycloalkyl is further optionally substituted with one or more -C1-C2 alkyl; wherein R12 is independently selected from -CO ₂ R13, and -NR14R15; 20 wherein R13, R14 and R15 are each independently -C1-C2 alkyl; R51 is hydrogen, and R52 is independently hydrogen, -C ₁ -C ₄ alkyl, -C ₅ -C ₆ cycloalkyl, - C1-C3alkylene-C5-C6 cycloalkyl, 5 to 6 membered heterocycloalkyl, -C1-C3alkylene-5 to 6 membered heterocycloalkyl, -C ₆ aryl, or -C ₁ -C ₃ alkylene-C ₆ aryl; wherein each alkyl and cycloalkyl is optionally substituted with one or more R ⁵³ ; 25 wherein each heterocycloalkyl is selected from pyrrolidine, piperidine, and piperazine, and wherein each heterocycle is optionally substituted with one or more -C ₁ -C ₂ alkyl or -C ₁ - C ₂ alkylene-phenyl; wherein each -C6 aryl is optionally substituted with one or more -C1-C2 alkyl or -C1- C4alkylene-5 to 6-membered heterocycloalkyl, wherein said heterocycloalkyl is selected from 30 piperidine and piperazine, and wherein said 5 to 6-membered heterocycloalkyl is optionally substituted with one or more -C1-C2 alkyl; R53 is independently -OR54, -CO ₂ R54, or -NR55R56; R54 is -C1-C2 alkyl; and P6306PC00 – 49 – R55 and R56 are each independently -H, -C1-C2 alkyl, phenyl, or -C1-C2alkylene-phenyl; or R51 and R52, together with the nitrogen atom to which they are attached, combine to form a membered heterocycloalkyl, wherein said heterocycloalkyl is selected from azetidine, 5 pyrrolidine, imidazolidine, piperidine, piperazine, morpholine, or 1,4-diazepane, wherein said azetidine, pyrrolidine, imidazolidine, piperidine, piperazine, morpholine, or 1,4-diazepane is optionally fused to one or more additional aryl or heteroaryl rings or said heterocycloalkyl is optionally connected at a single atom to another cycloalkyl or heterocycloalkyl to form a 10- to 15-membered spirocyclic heterocycle; and wherein said heterocycloalkyl is further optionally 10 substituted with one or more, preferably one or two, R73, and wherein when said heterocycloalkyl is azetidine, said azetidine is substituted at the 3-position and when said heterocycloalkyl is piperidine or piperazine, said piperidine or piperazine is substituted at the 4-position; R73 is independently selected from -C ₁ -C ₄ alkyl, -C ₃ -C ₆ cycloalkyl, -C ₁ -C ₃ alkylene-C ₃ - 15 C6 cycloalkyl, -C6-C10 aryl, -C1-C3 alkylene-C6-C10 aryl, -C(O)-C6-C10 aryl, 3-10 membered heterocycloalkyl, -C ₁ -C ₃ alkylene-3-10 membered heterocycloalkyl, 5-10 membered heteroaryl, -C ₁ -C ₃ alkylene-5-10 membered heteroaryl, -CH(OH)-5-10 membered heteroaryl, - NR ⁷⁵ R ⁷⁶ , -OR ⁷⁴ , or oxo; wherein said -C ₁ -C ₄ alkyl is optionally substituted with one or more -N(C ₁ -C ₂ alkyl) ₂ , - 20 OH, -OCH2CH2OH, or phenyl; wherein each aryl is optionally substituted with one or more -C ₁ -C ₂ alkyl, -CF ₃ , phenyl, halogen, -OCH3, or -SO2NH2; wherein each heterocycloalkyl is optionally substituted with one or more -C ₁ -C ₂ alkyl or oxo; 25 wherein each heteroaryl is optionally substituted with one or more oxo, -C1-C2 alkyl, - CF ₃ , or halogen; R75 and R76 are each independently -H, -C ₁ -C ₂ alkyl, -CO ₂ C ₁ -C ₄ alkyl, -SO ₂ phenyl, - C6-C10 aryl, or 5- to 6-membered heteroaryl, wherein each -C6-C10 aryl or 5- to 6-membered heteroaryl is optionally substituted with one or more -C1-C2 alkyl, halogen -OC1-C2 alkyl, or - 30 CN; and R74 is independently -H, -C6-C10 aryl or -C5-C6 cycloalkyl, wherein said cycloalkyl is optionally substituted by one or more -C ₁ -C ₂ alkyl. In some embodiments, R11 is selected from -C1-C4 alkyl, 5 to 6 membered heterocycloalkyl, -C ₁ -C ₂ alkylene-5 to 6 membered heterocycloalkyl, or -C ₁ -C ₂ alkylene-phenyl; P6306PC00 – 50 – wherein each alkyl is optionally substituted with one or more R12, preferably with exactly one R12, and wherein each 5 to 6 membered heterocycloalkyl is selected from pyrrolidine and piperidine, and wherein each 5 to 6 membered heterocycloalkyl is further optionally substituted with one or more -C1-C2 alkyl; 5 wherein R12 is independently selected from -CO R13, and 14 15 2 -NR R ; wherein R13, R14 and R15 are each independently -C1-C2 alkyl; R ⁵¹ is hydrogen, and R ⁵² is independently hydrogen, -C1-C4 alkyl, -C5-C6 cycloalkyl, - C ₁ -C ₃ alkylene-C ₅ -C ₆ cycloalkyl, 5 to 6 membered heterocycloalkyl, -C ₁ -C ₃ alkylene-5 to 6 membered heterocycloalkyl, -C6 aryl, or -C1-C3alkylene-C6 aryl; 10 wherein each alkyl and cycloalkyl is optionally substituted with one or more R53; wherein each heterocycloalkyl is selected from pyrrolidine, piperidine, and piperazine, and wherein each heterocycle is optionally substituted with one or more -C ₁ -C ₂ alkyl or -C ₁ - C ₂ alkylene-phenyl; wherein each -C ₆ aryl is optionally substituted with one or more -C ₁ -C ₂ alkyl or -C ₁ - 15 C4alkylene-5 to 6-membered heterocycloalkyl, wherein said heterocycloalkyl is selected from piperidine and piperazine, and wherein said 5 to 6-membered heterocycloalkyl is optionally substituted with one or more -C ₁ -C ₂ alkyl; R ⁵³ is independently -OR ⁵⁴ , -CO2R ⁵⁴ , or -NR ⁵⁵ R ⁵⁶ ; R54 is -C ₁ -C ₂ alkyl; and 20 R55 and R56 are each independently -H, -C1-C2 alkyl, phenyl, or -C1-C2alkylene-phenyl; or R51 and R52, together with the nitrogen atom to which they are attached, combine to form a membered heterocycloalkyl, wherein said heterocycloalkyl is selected from azetidine, pyrrolidine, imidazolidine, piperidine, piperazine, morpholine, or 1,4-diazepane, wherein said 25 heterocycloalkyl is further optionally substituted with one or more, preferably one or two, R73; R73 is independently selected from -C ₁ -C ₄ alkyl, -C ₃ -C ₆ cycloalkyl, -C ₁ -C ₃ alkylene-C ₃ - C ₆ cycloalkyl, -C ₆ -C ₁₀ aryl, -C ₁ -C ₃ alkylene-C ₆ -C ₁₀ aryl, -C(O)-C ₆ -C ₁₀ aryl, 3-10 membered heterocycloalkyl, -C1-C3 alkylene-3-10 membered heterocycloalkyl, 5-10 membered heteroaryl, -C1-C3 alkylene-5-10 membered heteroaryl, -CH(OH)-5-10 membered heteroaryl, - 30 NR ⁷⁵ R ⁷⁶ , -OR ⁷⁴ , or oxo; wherein said -C1-C4 alkyl is optionally substituted with one or more -N(C1-C2 alkyl)2, - OH, -OCH ₂ CH ₂ OH, or phenyl; wherein each aryl is optionally substituted with one or more -C1-C2 alkyl, -CF3, phenyl, halogen, -OCH ₃ , or -SO ₂ NH ₂ ; P6306PC00 – 51 – wherein each heterocycloalkyl is optionally substituted with one or more -C1-C2 alkyl or oxo; wherein each heteroaryl is optionally substituted with one or more oxo, -C ₁ -C ₂ alkyl, - CF3, or halogen; 5 R75 and R76 are each independently -H, -C1-C2 alkyl, -CO2C1-C4 alkyl, -SO2phenyl, - C6-C10 aryl, or 5- to 6-membered heteroaryl, wherein each -C6-C10 aryl or 5- to 6-membered heteroaryl is optionally substituted with one or more -C1-C2 alkyl, halogen -OC1-C2 alkyl, or - CN; and R74 is independently -H, -C6-C10 aryl or -C5-C6 cycloalkyl, wherein said cycloalkyl is10 optionally substituted by one or more -C ₁ -C ₂ alkyl. In some embodiments, X1 is -OR11. In some embodiments, the compound is of the Formula I-B1, Formula I-C1, Formula I-D1, Formula I-E1, I-F1, or I-G1: O R11O O 11 O ;

wherein R ¹¹ is as defined in Formula I.

In some embodiments of any of Formula I, Formula I-A, Formula I-B, Formula I-C, Formula I-D, Formula I-E, Formula I-F, Formula I-G, Formula I-Al, Formula I-Bl, Formula I-Cl, Formula I-Dl, Formula I-E 1, Formula I-Fl, or Formula I-Gl,

R ¹¹ is -Ci-Ce alkyl, -C2-C6 alkenyl, or -C2-C6 alkynyl, wherein each alkyl, alkenyl, or alkynyl is optionally substituted with one or more, preferably one or two, further preferably with exactly one R ¹² ; preferably wherein R ¹¹ is -C1-C4 alkyl, -C2-C4 alkenyl, or -C2-C4 alkynyl, wherein each alkyl, alkenyl, or alkynyl is optionally substituted with one or more, preferably one or two, further preferably with exactly one R ¹² ; more preferably wherein R ¹¹ is -C1-C3 alkyl, -C2-C3 alkenyl, or -C2-C3 alkynyl, wherein each alkyl, alkenyl, or alkynyl is optionally substituted with one or more, preferably one or two, further preferably with exactly one R ¹² ; yet more preferably wherein R ¹¹ is -C1-C2 alkyl, -C2 alkenyl, or -C2 alkynyl, wherein each alkyl, alkenyl, or alkynyl is optionally substituted with one or more, preferably one or two, further preferably with exactly one R ¹² .

In some embodiments, R ¹¹ is -Ci-Ce alkyl optionally substituted with one or more, preferably one or two, further preferably with exactly one R ¹² ; preferably wherein R ¹¹ is -Ci- C4 alkyl optionally substituted with one or more, preferably one or two, further preferably with exactly one R ¹² ; more preferably wherein R ¹¹ is -C1-C3 alkyl optionally substituted with one or more, preferably one or two, further preferably with exactly one R ¹² ; yet more preferably wherein R ¹¹ is -C1-C2 alkyl optionally substituted with one or more, preferably one or two, further preferably with exactly one R ¹² .

In some embodiments, R ¹¹ is -C1-C4 alkyl, preferably -C1-C3 alkyl, or 3-10 membered heterocycloalkyl, wherein each alkyl or heterocycloalkyl is optionally substituted with one or more R ¹² ; wherein R ¹² is independently -Ci-Ce alkyl, -C2-C6 alkenyl, -C2-C6 alkynyl, -C3-C6 cycloalkyl, -C5-C8 cycloalkenyl, 3-10 membered heterocycloalkyl, -Ce-Cio aryl, 5-10 membered heteroaryl, -Ci-Ce alkoxy, -Ci-Ce haloalkyl, halogen, cyano, oxo, -OR ¹³ , -CO2R ¹³ , or -NR ¹⁴ R ¹⁵ , wherein each alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, heterocycloalkyl, aryl or heteroaryl is optionally substituted with one or more R ¹⁶ .

In some embodiments, R ¹¹ is -C1-C4 alkyl, preferably -C1-C3 alkyl, or 3-10 membered heterocycloalkyl, wherein each alkyl or heterocycloalkyl is optionally substituted with one or more R ¹² ; wherein R ¹² is independently -Ci-Ce alkyl, -C2-C6 alkenyl, -C2-C6 alkynyl, -C3-C6 cycloalkyl, -C5-C8 cycloalkenyl, 3-10 membered heterocycloalkyl, -Ce-Cio aryl, 5-10 membered heteroaryl, -Ci-Ce alkoxy, -Ci-Ce haloalkyl, halogen, cyano, oxo, -OR ¹³ , -CO2R ¹³ , or -NR ¹⁴ R ¹⁵ , wherein each alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, heterocycloalkyl, aryl or heteroaryl is optionally substituted with one or more, preferably one or two, preferably exactly one R ¹⁶ ; wherein R ¹³ , R ¹⁴ and R ¹⁵ are each independently hydrogen, -Ci-Ce alkyl, -C3- Ce cycloalkyl, -C5-C8 cycloalkenyl, 3-10 membered heterocycloalkyl, -Ce-Cio aryl, or 5-10 membered heteroaryl, wherein each cycloalkyl, cycloalkenyl, heterocycloalkyl, aryl or heteroaryl is optionally substituted with one or more, preferably one or two, further preferably with exactly one R ²⁰ ; wherein R ¹⁶ and R ²⁰ are independently selected from -C1-C4 alkyl, halogen, cyano, -C1-C4 alkoxy, or -C1-C2 haloalkyl. In some embodiments, R ¹¹ is -C1-C4 alkyl, preferably -C1-C3 alkyl, or 3-6 membered heterocycloalkyl, wherein each alkyl is optionally substituted with one or more R ¹² and each heterocycloalkyl is optionally substituted with one or more -C1-C4 alkyl; wherein R ¹² is independently -C3-C6 cycloalkyl, -C5-C8 cycloalkenyl, 3-6 membered heterocycloalkyl, phenyl, 5-10 membered heteroaryl, -C1-C4 alkoxy, -C1-C4 haloalkyl, halogen, -OR ¹³ , -CO2R ¹³ , or - NR ¹⁴ R ¹⁵ , wherein each cycloalkyl, cycloalkenyl, heterocycloalkyl, phenyl or heteroaryl is optionally substituted with one or more, preferably one or two, preferably exactly one R ¹⁶ ; wherein R ¹³ , R ¹⁴ and R ¹⁵ are each independently hydrogen, or -C1-C4 alkyl; and wherein R ¹⁶ is independently selected from -C1-C4 alkyl, halogen, cyano, -C1-C4 alkoxy, or -C1-C2 haloalkyl.

In some embodiments, R ¹¹ is -C1-C4 alkyl, preferably -C1-C3 alkyl, or 3-6 membered heterocycloalkyl, wherein each alkyl is optionally substituted with one or more R ¹² and each heterocycloalkyl is optionally substituted with one or more -C1-C4 alkyl; wherein R ¹² is independently 3-6 membered heterocycloalkyl, phenyl, -OR ¹³ , -CO2R ¹³ , or -NR ¹⁴ R ¹⁵ , wherein each heterocycloalkyl or phenyl is optionally substituted with one or more, preferably one or two, preferably exactly one R ¹⁶ ; wherein R ¹³ , R ¹⁴ and R ¹⁵ are each independently hydrogen or -C1-C4 alkyl; and wherein R ¹⁶ is independently -C1-C4 alkyl.

In some embodiments, R ¹¹ is -C1-C4 alkyl, preferably -C1-C3 alkyl, or 5-6 membered heterocycloalkyl, wherein each alkyl is optionally substituted with one or more R ¹² and each heterocycloalkyl is optionally substituted with one or more -C1-C2 alkyl; wherein R ¹² is independently 5-6 membered heterocycloalkyl, phenyl, -CO2R ¹³ , or -NR ¹⁴ R ¹⁵ , wherein each heterocycloalkyl or phenyl is optionally substituted with exactly one R ¹⁶ ; wherein R ¹³ , R ¹⁴ and R ¹⁵ are each independently hydrogen or -C1-C2 alkyl; and wherein R ¹⁶ is independently -C1-C2 alkyl, preferably methyl.

In some embodiments, R ¹¹ is -C1-C4 alkyl, preferably -C1-C3 alkyl, or 5-6 membered heterocycloalkyl comprising one or two heteroatoms selected from N and O, wherein each alkyl is optionally substituted with one or more R ¹² and each heterocycloalkyl is optionally substituted with one or more -C1-C2 alkyl; wherein R ¹² is independently 5-6 membered heterocycloalkyl, phenyl, -CO2R ¹³ , or -NR ¹⁴ R ¹⁵ , wherein each heterocycloalkyl or phenyl is optionally substituted with exactly one R ¹⁶ ; wherein said heterocycloalkyl does not comprise heteroatoms other than O and N, preferably wherein said 5-6 membered heterocycloalkyl contains 1 to 4 heteroatoms, preferably 1 to 3, further preferably 1 or 2 heteroatoms selected from O and N; wherein R ¹³ , R ¹⁴ and R ¹⁵ are each independently -C1-C2 alkyl; and wherein R ¹⁶ is independently -C1-C2 alkyl, preferably methyl. In some embodiments, R ¹¹ is -C1-C4 alkyl, preferably -C1-C3 alkyl, or 5-6 membered heterocycloalkyl selected from piperidine, piperazine, and pyrrolidine, wherein each alkyl is optionally substituted with one or more R ¹² and each heterocycloalkyl is optionally substituted with one or more -C1-C2 alkyl; wherein R ¹² is independently 5-6 membered heterocycloalkyl, phenyl, -CO2R ¹³ , or -NR ¹⁴ R ¹⁵ , wherein each heterocycloalkyl or phenyl is optionally substituted with exactly one R ¹⁶ ; wherein said heterocycloalkyl does not comprise heteroatoms other than O and N, preferably wherein said 5-6 membered heterocycloalkyl is selected from pyrrolidine, piperazine, or morpholine; wherein R ¹³ , R ¹⁴ and R ¹⁵ are each independently -Ci- C2 alkyl; and wherein R ¹⁶ is independently -C1-C2 alkyl, preferably methyl.

In some embodiments, R ¹¹ is -C1-C4 alkyl, preferably -C1-C3 alkyl, or heterocycle selected from piperidine and pyrrolidine, wherein each alkyl is optionally substituted with one or more R ¹² and each piperidine or pyrrolidine is optionally substituted with one methyl; wherein R ¹² is independently 5-6 membered heterocycloalkyl, phenyl, -CO2R ¹³ , or -NR ¹⁴ R ¹⁵ , wherein each heterocycloalkyl or phenyl is optionally substituted with exactly one R ¹⁶ ; wherein said heterocycloalkyl does not comprise heteroatoms other than O and N, preferably wherein said 5-6 membered heterocycloalkyl is selected from pyrrolidine, piperidine, piperazine, or morpholine, more preferably wherein said 5-6 membered heterocycle is selected from pyrrolidine and piperidine; wherein R ¹³ , R ¹⁴ and R ¹⁵ are each independently -C1-C2 alkyl; and wherein R ¹⁶ is independently -C1-C2 alkyl, preferably methyl.

In some embodiments, R ¹¹ is selected from -C1-C4 alkyl, 5 to 6 membered heterocycloalkyl, or -Ci-C2alkylene-5 to 6 membered heterocycloalkyl; wherein each alkyl is optionally substituted with one or more R ¹² and wherein each 5 to 6 membered heterocycloalkyl is optionally substituted with one or more -C1-C4 alkyl; wherein R ¹² is independently selected from phenyl, -CO2R ¹³ , and -NR ¹⁴ R ¹⁵ ; and wherein R ¹³ , R ¹⁴ and R ¹⁵ are each independently -C1-C2 alkyl.

In some embodiments, R ¹¹ is selected from -C1-C4 alkyl, 5 to 6 membered heterocycloalkyl, or -Ci-C2alkylene-5 to 6 membered heterocycloalkyl; wherein each alkyl is optionally substituted with one or more R ¹² and wherein each 5 to 6 membered heterocycloalkyl does not comprise heteroatoms other than O and N and wherein each 5 to 6 membered heterocycloalkyl is further optionally substituted with one or more -C1-C2 alkyl; wherein R ¹² is independently selected from phenyl, -CO2R ¹³ , and -NR ¹⁴ R ¹⁵ ; wherein R ¹³ , R ¹⁴ and R ¹⁵ are each independently -C1-C2 alkyl.

In some embodiments, R ¹¹ is selected from -C1-C4 alkyl, 5 to 6 membered heterocycloalkyl, or -Ci-C2alkylene-5 to 6 membered heterocycloalkyl; wherein each alkyl is optionally substituted with one or more R ¹² , preferably with exactly one R ¹² , and wherein each 5 to 6 membered heterocycloalkyl is selected from pyrrolidine, piperidine, piperazine, and morpholine, and wherein each 5 to 6 membered heterocycloalkyl is further optionally substituted with one or more -C1-C2 alkyl; wherein R ¹² is independently selected from phenyl, -CO2R ¹³ , and -NR ¹⁴ R ¹⁵ ; wherein R ¹³ , R ¹⁴ and R ¹⁵ are each independently -C1-C2 alkyl.

In some embodiments, R ¹¹ is selected from -C1-C4 alkyl, 5 to 6 membered heterocycloalkyl, or -Ci-C2alkylene-5 to 6 membered heterocycloalkyl; wherein each alkyl is optionally substituted with one or more R ¹² , preferably with exactly one R ¹² , and wherein each 5 to 6 membered heterocycloalkyl is selected from pyrrolidine and piperidine, and wherein each 5 to 6 membered heterocycloalkyl is further optionally substituted with one or more -C1-C2 alkyl; wherein R ¹² is independently selected from phenyl, -CO2R ¹³ , and -NR ¹⁴ R ¹⁵ ; wherein R ¹³ , R ¹⁴ and R ¹⁵ are each independently -C1-C2 alkyl.

In some embodiments, R ¹¹ is selected from -C1-C4 alkyl, 5 to 6 membered heterocycloalkyl, -Ci-C2alkylene-5 to 6 membered heterocycloalkyl, or -Ci-C2alkylene-phenyl; wherein each alkyl is optionally substituted with one or more R ¹² , preferably with exactly one R ¹² , and wherein each 5 to 6 membered heterocycloalkyl is selected from pyrrolidine and piperidine, and wherein each 5 to 6 membered heterocycloalkyl is further optionally substituted with one or more -C1-C2 alkyl; wherein R ¹² is independently selected from -CO2R ¹³ , and -NR ¹⁴ R ¹⁵ ; wherein R ¹³ , R ¹⁴ and R ¹⁵ are each independently -C1-C2 alkyl.

In some embodiments, X ¹ is -NR ⁵¹ NR ⁵² .

In some embodiments, the compound is of the Formula I-B2, Formula I-C2, Formula I-D2, Formula I-E2, Formula I-F2, or Formula I-G2:

R51 R ⁵¹ N O ; In some embodiments of any of Formula I, Formula I-A, Formula I-B, Formula I-C, Formula I-D, Formula I-E, Formula I-F, Formula I-G, Formula I-A2, Formula I-B2, Formula 5 I-C2, Formula I-D2, Formula I-E2, Formula I-F2, or Formula I-G2, R ⁵¹ and R ⁵² are each independently hydrogen, -C ₁ -C ₆ alkyl, preferably -C ₁ -C ₄ alkyl, more preferably -C ₁ -C ₃ alkyl, 3-10 membered heterocycloalkyl, or -C6-C10 aryl, wherein each alkyl, heterocycloalkyl, or aryl is optionally substituted with one or more R53; or R51 and R52, together with the nitrogen atom to which they are attached, combine to 10 form a 3-15 membered heterocycloalkyl or 5-15 membered heteroaryl, wherein the heterocycloalkyl or heteroaryl are optionally substituted with one or more R ⁵³ . In some embodiments, R51 and R52 are each independently hydrogen, -C ₁ -C ₆ alkyl, preferably -C1-C4 alkyl, more preferably -C1-C3 alkyl, 3-10 membered heterocycloalkyl, or - C6-C10 aryl, wherein each alkyl, heterocycloalkyl, or aryl is optionally substituted with one or15 more R53; or R51 and R52, together with the nitrogen atom to which they are attached, combine to form a 3-15 membered heterocycloalkyl or 5-15 membered heteroaryl, wherein the heterocycloalkyl or heteroaryl are optionally substituted with one or more R53; wherein R53 is independently hydrogen, -C ₁ -C ₆ alkyl, -C ₂ -C ₆ alkenyl, -C ₂ -C ₆ alkynyl, - 20 C3-C6 cycloalkyl, -C5-C8 cycloalkenyl, 3-10 membered heterocycloalkyl, -C6-C10 aryl, 5-10 membered heteroaryl, halogen, cyano, oxo, -OR54, -CO ₂ R54, or -NR55R56, wherein each alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, heterocycloalkyl, aryl, and heteroaryl is optionally substituted with one or more R ⁵⁷ . P6306PC00 – 59 – In some embodiments, R51 and R52 are each independently hydrogen, -C1-C6 alkyl, preferably -C1-C4 alkyl, more preferably -C1-C3 alkyl, 3-10 membered heterocycloalkyl, or - C ₆ -C ₁₀ aryl, wherein each alkyl, heterocycloalkyl, or aryl is optionally substituted with one or more R53; or 5 R51 and R52, together with the nitrogen atom to which they are attached, combine to form a 3-15 membered heterocycloalkyl or 5-15 membered heteroaryl, wherein the heterocycloalkyl or heteroaryl are optionally substituted with one or more R ⁵³ ; wherein R53 is independently -C ₁ -C ₆ alkyl, -C ₃ -C ₆ cycloalkyl, 3-10 membered heterocycloalkyl, -C 54 54 55 56 6-C10 aryl, 5-10 membered heteroaryl, -OR , -CO2R , or -NR R , 10 wherein each alkyl, cycloalkyl, cycloalkenyl, heterocycloalkyl, aryl, or heteroaryl is optionally substituted with one or more R57. In some embodiments, R51 is hydrogen, or R51 and R52, together with the nitrogen atom to which they are attached, combine to form a 3-15 membered heterocycloalkyl or 5-15 membered heteroaryl, wherein the heterocycloalkyl or heteroaryl are optionally substituted with15 one or more R57. In some embodiments, R51 is hydrogen, and R52 is independently hydrogen, -C ₁ -C ₆ alkyl, preferably -C ₁ -C ₄ alkyl, more preferably -C ₁ -C ₃ alkyl, 3-10 membered heterocycloalkyl, or phenyl, wherein each alkyl, heterocycloalkyl, or phenyl is optionally substituted with one or more R53; or 20 R51 and R52, together with the nitrogen atom to which they are attached, combine to form a 3-15 membered heterocycloalkyl or 5-15 membered heteroaryl, wherein the heterocycloalkyl or heteroaryl are optionally substituted with one or more R53; wherein R53 is independently -C ₁ -C ₆ alkyl, -C ₃ -C ₆ cycloalkyl, 3-10 membered heterocycloalkyl, phenyl, 5-10 membered heteroaryl, -OR ⁵⁴ , -CO2R ⁵⁴ , or -NR ⁵⁵ R ⁵⁶ , wherein 25 each alkyl, cycloalkyl, heterocycloalkyl, phenyl or heteroaryl is optionally substituted with one or more R57; wherein R54, R55 and R56 are each independently hydrogen, -C ₁ -C ₆ alkyl, or phenyl, wherein said -C 61 55 1-C6 alkyl is optionally substituted with one or more R ; or wherein R and R56 combine to form a 5-6 membered heterocycloalkyl optionally substituted with one or more 30 R ⁵⁷ ; and R ⁵⁷ is -C ₁ -C ₆ alkyl, oxo, -NR ⁵⁹ R ⁶⁰ , or SO ₂ NH ₂ , wherein said -C ₁ -C ₆ alkyl is optionally substituted with one or more R61. In some embodiments, R51 is hydrogen, and R52 is independently hydrogen, -C ₁ -C ₆ alkyl, preferably -C1-C4 alkyl, more preferably -C1-C3 alkyl, 5-6 membered heterocycloalkyl, P6306PC00 – 60 – or phenyl, wherein each alkyl, heterocycloalkyl, or phenyl is optionally substituted with one or more, preferably one or two, preferably exactly one R53; or R51 and R52, together with the nitrogen atom to which they are attached, combine to form a 5-6 membered heterocycloalkyl or 5-6 membered heteroaryl, wherein the 5 heterocycloalkyl or heteroaryl are optionally substituted with one or more, preferably one or two, preferably exactly one R53; wherein R ⁵³ is independently -C1-C6 alkyl, preferably -C1-C4 alkyl, more preferably - C ₁ -C ₃ alkyl, -C ₅ -C ₆ cycloalkyl, 5-6 membered heterocycloalkyl, phenyl, 5-6 membered heteroaryl, -OR54, -CO2R54, or -NR55R56, wherein each alkyl, cycloalkyl, heterocycloalkyl, 10 phenyl or heteroaryl is optionally substituted with one or more, preferably one or two, more preferably exactly one R57; wherein R54, R55 and R56 are each independently hydrogen, -C ₁ -C ₆ alkyl, preferably - C ₁ -C ₄ alkyl, more preferably -C ₁ -C ₃ alkyl, or phenyl, wherein said -C ₁ -C ₆ alkyl is optionally substituted with one or more R61; or wherein R55 and R56 combine to form a 5-6 membered15 heterocycloalkyl optionally substituted with one or more R57; and R57 is -C1-C6 alkyl, oxo, - NR59R60, SO ₂ NH ₂ , wherein said -C ₁ -C ₆ alkyl is optionally substituted with one or more R61. In some embodiments, R51 is hydrogen, and R52 is independently hydrogen, -C ₁ -C ₆ alkyl, preferably -C1-C4 alkyl, more preferably -C1-C3 alkyl, 5-6 membered heterocycloalkyl wherein the heterocycloalkyl comprises no more than 1 to 4, preferably one to 3, more 20 preferably one or two heteroatoms selected from O and N, or phenyl, wherein each alkyl, heterocycloalkyl, or phenyl is optionally substituted with one or more, preferably one or two, preferably exactly one R53; or R51 and R52, together with the nitrogen atom to which they are attached, combine to form a 5-6 membered heterocycloalkyl, wherein the heterocycloalkyl comprises no more than 25 1 to 4, preferably one to 3, more preferably one or two heteroatoms selected from O and N, and is optionally substituted with one or more, preferably one or two, preferably exactly one R53; wherein R53 is independently -C ₁ -C ₆ alkyl, preferably -C ₁ -C ₄ alkyl, more preferably - C1-C3 alkyl, -C5-C6 cycloalkyl, 5-6 membered heterocycloalkyl wherein the heterocycloalkyl comprises no more than 1 to 4, preferably one to 3, more preferably one or two heteroatoms 30 selected from O and N, phenyl, -OR ⁵⁴ , -CO ₂ R ⁵⁴ , or -NR ⁵⁵ R ⁵⁶ , wherein each alkyl, cylcloalkyl, heterocycloalkyl, or phenyl is optionally substituted with one or more, preferably one or two, more preferably exactly one R57; wherein R54, R55 and R56 are each independently hydrogen, -C1-C6 alkyl, preferably - C ₁ -C ₄ alkyl, more preferably -C ₁ -C ₃ alkyl, or phenyl, wherein said -C ₁ -C ₆ alkyl is optionally P6306PC00 – 61 – substituted with one or more R61; or wherein R55 and R56 combine to form a 5-6 membered heterocycloalkyl optionally substituted with one or more R57; and R57 is -C1-C6 alkyl, oxo, - NR59R60, or SO ₂ NH ₂ , wherein said -C ₁ -C ₆ alkyl is optionally substituted with one or more R61. In some embodiments, R51 is hydrogen, and R52 is independently hydrogen, -C1-C6 5 alkyl, preferably -C1-C4 alkyl, more preferably -C1-C3 alkyl, piperidine, piperazine, morpholine, or phenyl, wherein each alkyl, piperidine, piperazine, morpholine, or phenyl is optionally substituted with one or more, preferably one or two, preferably exactly one R ⁵³ ; or R51 and R52, together with the nitrogen atom to which they are attached, combine to form a piperidine, piperazine, or morpholine, wherein the piperidine, piperazine, or morpholine 10 is optionally substituted with one or more, preferably one or two, preferably exactly one R53; wherein R53 is independently -C1-C6 alkyl, preferably -C1-C4 alkyl, more preferably - C ₁ -C ₃ alkyl, cyclohexane, piperidine, piperazine, morpholine, phenyl, -OR54, -CO ₂ R54, or - NR ⁵⁵ R ⁵⁶ , wherein each cyclohexane, piperidine, piperazine, morpholine, or phenyl is optionally substituted with one or more, preferably one or two, more preferably exactly one R57; 15 wherein R54, R55 and R56 are each independently hydrogen, -C1-C6 alkyl, preferably - C ₁ -C ₄ alkyl, more preferably -C ₁ -C ₃ alkyl, or phenyl; or wherein R55 and R56 combine to form a 5-6 membered heterocycloalkyl substituted with oxo and methyl; and R57 is -C ₁ -C ₆ alkyl, oxo, -NR ⁵⁹ R ⁶⁰ , SO2NH2, wherein said -C1-C6 alkyl is optionally substituted with one or more R ⁶¹ ; wherein R59 and R60 are independently hydrogen or -C ₁ -C ₃ alkyl optionally substituted by R64; 20 R61 is 6-membered heterocycloalkyl, and R62 is -C1-C3 alkyl, preferably -C1-C2 alkyl, preferably methyl; and R64 is methyl or phenyl. In some embodiments, R51 is hydrogen, and R52 is independently hydrogen, -C1-C6 alkyl, preferably -C ₁ -C ₄ alkyl, more preferably -C ₁ -C ₃ alkyl, piperidine, piperazine, morpholine, or phenyl, wherein each alkyl, piperidine, piperazine, morpholine, or phenyl is25 optionally substituted with one or more, preferably one or two, preferably exactly one R53; or R51 and R52, together with the nitrogen atom to which they are attached, combine to form a piperidine, piperazine, or morpholine, wherein the piperidine, piperazine, or morpholine is optionally substituted with one or more, preferably one or two, preferably exactly one R53; wherein R53 is independently -C1-C6 alkyl, preferably -C1-C4 alkyl, more preferably -30 C ₁ -C ₃ alkyl, cyclohexane, piperidine, piperazine, morpholine, phenyl, -OR ⁵⁴ , -CO ₂ R ⁵⁴ , or - NR55R56, wherein each cyclohexane, piperidine, piperazine, morpholine, phenyl or heteroaryl is optionally substituted with one or more, preferably one or two, more preferably exactly one R57; P6306PC00 – 62 – wherein R54, R55 and R56 are each independently hydrogen, -C1-C6 alkyl, preferably - C1-C4 alkyl, more preferably -C1-C3 alkyl, or phenyl, wherein said -C1-C6 alkyl is optionally substituted with one or more phenyl; and R57 is -C ₁ -C ₆ alkyl, oxo, -NR59R60, or SO ₂ NH ₂ . In some embodiments, R51 is hydrogen; and R52 is 3-10 membered heterocycloalkyl. 5 In some embodiments, R51 is hydrogen, and R52 is 5-6 membered heterocycloalkyl optionally substituted by one or more, preferably one or two, preferably exactly one methyl. In some embodiments, R ⁵¹ is hydrogen, and R ⁵² is piperidine, piperazine, or morpholine optionally substituted by one or more, preferably one or two, preferably exactly one methyl. In some embodiments, R51 is hydrogen; and R52 is an optionally substituted -C3-C610 cycloalkyl; preferably an optionally substituted -C ₅ -C ₆ cycloalkyl. In some embodiments, R51 is hydrogen, and R52 is cyclohexane optionally substituted by one or more, preferably one or two, preferably exactly one R53, wherein R53 is NR55R56, and R ⁵⁵ and R ⁵⁶ are each independently hydrogen, -C ₁ -C ₆ alkyl, preferably methyl, wherein each - C ₁ -C ₆ alkyl is optionally substituted by phenyl. 15 In some embodiments, R51 and R52 are both independently -C6-C10 aryl, preferably wherein R51 and R52 are both independently phenyl. In some embodiments, R51 and R52 are each independently hydrogen, -C ₁ -C ₆ alkyl, -C ₃ - C6 cycloalkyl, -C1-C6alkylene-C3-C6 cycloalkyl, 3 to 10 membered heterocycloalkyl, -C1- C ₆ alkylene-3 to 10 membered heterocycloalkyl, -C ₆ -C ₁₀ aryl, or -C ₁ -C ₆ alkylene-C ₆ -C ₁₀ aryl; 20 wherein each alkyl and cycloalkyl is optionally substituted with one or more R53; wherein each heterocycloalkyl is optionally substituted with one or more -C ₁ -C ₆ alkyl or -C1-C6alkylene-phenyl; wherein each aryl is optionally substituted with one or more -C ₁ -C ₆ alkyl or -C ₁ - C6alkylene-5 to 6-membered heterocycloalkyl, and wherein said 5 to 6-membered 25 heterocycloalkyl is optionally substituted with one or more -C1-C6 alkyl; R53 is independently -OR54, -CO ₂ R54, or -NR55R56; R54 is -C ₁ -C ₄ alkyl; and R55 and R56 are each independently -H, -C1-C4 alkyl, phenyl, or -C1-C6alkylene-phenyl. In some embodiments, R51 and R52 are each independently hydrogen, -C1-C4 alkyl, -C3-30 C ₆ cycloalkyl, -C ₁ -C ₄ alkylene-C ₃ -C ₆ cycloalkyl, 3 to 10 membered heterocycloalkyl, -C ₁ - C4alkylene-3 to 10 membered heterocycloalkyl, -C6-C10 aryl, or -C1-C4alkylene-C6-C10 aryl; wherein each alkyl and cycloalkyl is optionally substituted with one or more R53; wherein each heterocycloalkyl is optionally substituted with one or more -C1-C6 alkyl or -C ₁ -C ₄ alkylene-phenyl; P6306PC00 – 63 – wherein each aryl is optionally substituted with one or more -C1-C6 alkyl or -C1- C4alkylene-5 to 6-membered heterocycloalkyl, and wherein said 5 to 6-membered heterocycloalkyl is optionally substituted with one or more -C ₁ -C ₄ alkyl; R53 is independently -OR54, -CO 54 55 56 2R , or -NR R ; 5 R54 is -C1-C4 alkyl; and R55 and R56 are each independently -H, -C1-C4 alkyl, phenyl, or -C1-C4alkylene-phenyl. In some embodiments, R ⁵¹ and R ⁵² are each independently hydrogen, -C1-C4 alkyl, -C5- C ₆ cycloalkyl, -C ₁ -C ₄ alkylene-C ₅ -C ₆ cycloalkyl, 5 to 6 membered heterocycloalkyl, -C ₁ - C4alkylene-5 to 6 membered heterocycloalkyl, -C6 aryl, or -C1-C4alkylene-C6 aryl; 10 wherein each alkyl and cycloalkyl is optionally substituted with one or more R53; wherein each heterocycloalkyl is optionally substituted with one or more -C1-C4 alkyl or -C ₁ -C ₄ alkylene-phenyl; wherein each -C ₆ aryl is optionally substituted with one or more -C ₁ -C ₄ alkyl or -C ₁ - C ₄ alkylene-5 to 6-membered heterocycloalkyl, and wherein said 5 to 6-membered 15 heterocycloalkyl is optionally substituted with one or more -C1-C4 alkyl; R53 is independently -OR54, -CO ₂ R54, or -NR55R56; R54 is -C ₁ -C ₄ alkyl; and R ⁵⁵ and R ⁵⁶ are each independently -H, -C1-C4 alkyl, phenyl, or -C1-C4alkylene-phenyl. In some embodiments, R51 and R52 are each independently hydrogen, -C ₁ -C ₄ alkyl, -C ₅ -20 C6 cycloalkyl, -C1-C3alkylene-C5-C6 cycloalkyl, 5 to 6 membered heterocycloalkyl, -C1- C ₃ alkylene-5 to 6 membered heterocycloalkyl, -C ₆ aryl, or -C ₁ -C ₃ alkylene-C ₆ aryl; wherein each alkyl and cycloalkyl is optionally substituted with one or more R53; wherein each heterocycloalkyl is optionally substituted with one or more -C ₁ -C ₂ alkyl or -C1-C2alkylene-phenyl; 25 wherein each -C6 aryl is optionally substituted with one or more -C1-C2 alkyl or -C1- C ₄ alkylene-5 to 6-membered heterocycloalkyl, and wherein said 5 to 6-membered heterocycloalkyl is optionally substituted with one or more -C ₁ -C ₂ alkyl; R53 is independently -OR54, -CO R54 55 56 2 , or -NR R ; R54 is -C1-C2 alkyl; and 30 R ⁵⁵ and R ⁵⁶ are each independently -H, -C ₁ -C ₂ alkyl, phenyl, or -C ₁ -C ₂ alkylene-phenyl. In some embodiments, R51 and R52 are each independently hydrogen, -C1-C4 alkyl, -C5- C ₆ cycloalkyl, -C ₁ -C ₃ alkylene-C ₅ -C ₆ cycloalkyl, 5 to 6 membered heterocycloalkyl, -C ₁ - C3alkylene-5 to 6 membered heterocycloalkyl, -C6 aryl, or -C1-C3alkylene-C6 aryl; wherein each alkyl and cycloalkyl is optionally substituted with one or more R53; P6306PC00 – 64 – wherein each heterocycloalkyl is selected from pyrrolidine, piperidine, piperazine, and morpholine, and wherein each heterocycle is optionally substituted with one or more -C1-C2 alkyl or -C ₁ -C ₂ alkylene-phenyl; wherein each -C6 aryl is optionally substituted with one or more -C1-C2 alkyl or -C1- 5 C4alkylene-5 to 6-membered heterocycloalkyl, and wherein said 5 to 6-membered heterocycloalkyl is optionally substituted with one or more -C1-C2 alkyl; R ⁵³ is independently -OR ⁵⁴ , -CO2R ⁵⁴ , or -NR ⁵⁵ R ⁵⁶ ; R54 is -C ₁ -C ₂ alkyl; and R55 and R56 are each independently -H, -C1-C2 alkyl, phenyl, or -C1-C2alkylene-phenyl. 10 In some embodiments, R51 and R52 are each independently hydrogen, -C ₁ -C ₄ alkyl, -C ₅ - C6 cycloalkyl, -C1-C3alkylene-C5-C6 cycloalkyl, 5 to 6 membered heterocycloalkyl, -C1- C ₃ alkylene-5 to 6 membered heterocycloalkyl, -C ₆ aryl, or -C ₁ -C ₃ alkylene-C ₆ aryl; wherein each alkyl and cycloalkyl is optionally substituted with one or more R ⁵³ ; wherein each heterocycloalkyl is selected from pyrrolidine, piperidine, piperazine, and15 morpholine, and wherein each heterocycle is optionally substituted with one or more -C1-C2 alkyl or -C ₁ -C ₂ alkylene-phenyl; wherein each -C ₆ aryl is optionally substituted with one or more -C ₁ -C ₂ alkyl or -C ₁ - C4alkylene-5 to 6-membered heterocycloalkyl, wherein said heterocycloalkyl is selected from pyrrolidine, piperidine, piperazine, and morpholine, and wherein said 5 to 6-membered 20 heterocycloalkyl is optionally substituted with one or more -C1-C2 alkyl; R53 is independently -OR54, -CO ₂ R54, or -NR55R56; R54 is -C1-C2 alkyl; and R55 and R56 are each independently -H, -C ₁ -C ₂ alkyl, phenyl, or -C ₁ -C ₂ alkylene-phenyl. In some embodiments, R ⁵¹ and R ⁵² are each independently hydrogen, -C1-C4 alkyl, -C5-25 C6 cycloalkyl, -C1-C3alkylene-C5-C6 cycloalkyl, 5 to 6 membered heterocycloalkyl, -C1- C ₃ alkylene-5 to 6 membered heterocycloalkyl, -C ₆ aryl, or -C ₁ -C ₃ alkylene-C ₆ aryl; wherein each alkyl and cycloalkyl is optionally substituted with one or more R53; wherein each heterocycloalkyl is selected from pyrrolidine, piperidine, and piperazine, and wherein each heterocycle is optionally substituted with one or more -C1-C2 alkyl or -C1- 30 C ₂ alkylene-phenyl; wherein each -C6 aryl is optionally substituted with one or more -C1-C2 alkyl or -C1- C ₄ alkylene-5 to 6-membered heterocycloalkyl, wherein said heterocycloalkyl is selected from piperidine and piperazine, and wherein said 5 to 6-membered heterocycloalkyl is optionally substituted with one or more -C ₁ -C ₂ alkyl; P6306PC00 – 65 – R53 is independently -OR54, -CO 54 55 56 2R , or -NR R ; R54 is -C1-C2 alkyl; and R55 and R56 are each independently -H, -C ₁ -C ₂ alkyl, phenyl, or -C ₁ -C ₂ alkylene-phenyl. In some embodiments, R51 is hydrogen, and R52 is independently hydrogen, -C1-C4 5 alkyl, -C5-C6 cycloalkyl, -C1-C3alkylene-C5-C6 cycloalkyl, 5 to 6 membered heterocycloalkyl, -C1-C3alkylene-5 to 6 membered heterocycloalkyl, -C6 aryl, or -C1-C3alkylene-C6 aryl; wherein each alkyl and cycloalkyl is optionally substituted with one or more R ⁵³ ; wherein each heterocycloalkyl is selected from pyrrolidine, piperidine, and piperazine, and wherein each heterocycle is optionally substituted with one or more -C1-C2 alkyl or -C1- 10 C ₂ alkylene-phenyl; wherein each -C6 aryl is optionally substituted with one or more -C1-C2 alkyl or -C1- C ₄ alkylene-5 to 6-membered heterocycloalkyl, wherein said heterocycloalkyl is selected from piperidine and piperazine, and wherein said 5 to 6-membered heterocycloalkyl is optionally substituted with one or more -C ₁ -C ₂ alkyl; 15 R53 is independently -OR54, -CO 54 55 56 2R , or -NR R ; R54 is -C ₁ -C ₂ alkyl; and R55 and R56 are each independently -H, -C ₁ -C ₂ alkyl, phenyl, or -C ₁ -C ₂ alkylene-phenyl. In some embodiments, R ⁵¹ and R ⁵² combine to form an optionally substituted 3-10 membered heterocycloalkyl; preferably an optionally substituted 5-6 membered20 heterocycloalkyl. In some embodiments, R51 and R52, together with the nitrogen atom to which they are attached, combine to form a 5-6 membered heterocycloalkyl, wherein the heterocycloalkyl is optionally substituted with one or more R53. In some embodiments, R ⁵¹ and R ⁵² , together with the nitrogen atom to which they are 25 attached, combine to form a 5-6 membered heterocycloalkyl, wherein the heterocycloalkyl comprises one to four, preferably one to three, more preferably tone to two heteroatoms selected from O and N, and is optionally substituted with one or more R53. In some embodiments, R51 and R52, together with the nitrogen atom to which they are attached, combine to form a piperidine, piperazine, or morpholine, wherein in the piperidine, 30 piperazine, or morpholine is optionally substituted with one or more R ⁵³ . In some embodiments, R51 and R52, together with the nitrogen atom to which they are attached, combine to form a piperidine, piperazine, or morpholine, wherein in the piperidine, piperazine, or morpholine is optionally substituted with one or more R53; wherein R53 is P6306PC00 – 66 – independently -C -C alkyl, (preferably -C -C alkyl, preferably meth 59 60 1 6 1 3 yl), phenyl, or NR R , wherein said phenyl is optionally substituted by -SO2NH2, wherein R59 and R60 are independently methyl or phenyl, or R59 and R60 combine to form a piperazine substituted by oxo and methyl. 5 In some embodiments, R51 is hydrogen; and R52 is optionally substituted -C6-C10 aryl; preferably wherein the optionally substituted aryl is optionally substituted phenyl. In some embodiments, R ⁵¹ is hydrogen, and R ⁵² is phenyl; wherein said phenyl is optionally substituted by -C ₁ -C ₆ alkyl, preferably -C ₁ -C ₃ alkyl; wherein said -C ₁ -C ₆ alkyl is optionally substituted by piperidine or piperazine, and wherein each piperidine or piperazine is 10 optionally substituted with methyl. In some embodiments, X1 is -NR51R52, wherein R51 and R52 are each independently hydrogen, -C ₁ -C ₆ alkyl, -C ₁ -C ₆ alkylene-R53A, -C ₅ -C ₆ cycloalkyl, 5-6 membered heterocycloalkyl or phenyl, wherein preferably at least one of R ⁵¹ and R ⁵² is hydrogen, wherein each alkyl, alkylene, cycloalkyl, heterocycloalkyl or phenyl is optionally substituted with one 15 or more, preferably one or two, R53; or R51 and R52, together with the nitrogen atom to which they are attached, combine to form a 3-15 membered heterocycloalkyl, wherein said heterocycloalkyl is optionally substituted with one or more, preferably one or two, R53. In some preferred embodiments, X ¹ is -NR ⁵¹ R ⁵² , wherein R ⁵¹ and R ⁵² , together with the nitrogen atom to which they are attached, combine to form a heterocycloalkyl, wherein said 20 heterocycloalkyl is optionally substituted with one or more R53. In some embodiments, X1 is -NR51R52, wherein R51 and R52, together with the nitrogen atom to which they are attached, combine to form a 3-15 membered heterocycloalkyl, wherein said heterocycloalkyl is optionally substituted with one or more, preferably one or two, R53; or wherein said heterocycle is fused to one or more additional aryl or heteroaryl rings to form a 25 10- to 15-membered heteroaryl, wherein said 10- to 15-membered heteroaryl is optionally substituted with one or more, preferably one or two, R53; or wherein said heterocycle is connected at a single atom to another cycloalkyl or heterocycloalkyl to form a 10- to 15- membered spirocyclic heterocycle; and wherein said spirocyclic is optionally substituted with one or more, preferably one or two, R53. 30 In some embodiments, X ¹ is -NR ⁵¹ R ⁵² , wherein R ⁵¹ and R ⁵² , together with the nitrogen atom to which they are attached, combine to form a 3-15 membered heterocycloalkyl, wherein said heterocycloalkyl is optionally substituted with one or more R53. In some embodiments, X1 is -NR51R52, wherein R51 and R52, together with the nitrogen atom to which they are attached, combine to form a 3-15 membered heterocycloalkyl, wherein said heterocycloalkyl is fused to one or more additional aryl or heteroaryl rings to form a 10- to 15-membered heteroaryl, wherein said 10- to 15-membered heteroaryl is optionally substituted with one or more R ⁵³ .

In some embodiments, X ¹ is -NR ⁵¹ R ⁵² , wherein R ⁵¹ and R ⁵² , together with the nitrogen atom to which they are attached, combine to form a 3-15 membered heterocycloalkyl, wherein said heterocycloalkyl is connected at a single atom to another cycloalkyl or heterocycloalkyl to form a 10- to 15 -membered spirocyclic heterocycle; and wherein said spirocyclic is optionally substituted with one or more R ⁵³ .

In some embodiments, X ¹ is -NR ⁵¹ R ⁵² , wherein R ⁵¹ and R ⁵² , together with the nitrogen atom to which they are attached, combine to form a 3-15 membered heterocycloalkyl, wherein said 3- to 15-membered heterocycloalkyl is a piperidine, morpholine, 1,4-diazepane, piperazine, or an azetidine. In another embodiment, said heterocycloalkyl is a piperidine. In another embodiment, said heterocycloalkyl is a morpholine. In another embodiment, said heterocycloalkyl is a 1,4-diazepane. In another embodiment, said heterocycloalkyl is a piperazine. In another embodiment, said heterocycloalkyl is an azetidine,

In some preferred embodiments, X ¹ is -NR ⁵¹ R ⁵² , wherein R ⁵¹ and R ⁵² , together with the nitrogen atom to which they are attached, combine to form a heterocycloalkyl, wherein (i) said heterocycloalkyl is a piperidine, morpholine, 1,4-diazepane, piperazine, or an azetidine, wherein said piperidine, morpholine, 1,4-diazepane, piperazine or azetidine is optionally substituted with one or more R ⁵³ ; or (ii) wherein said heterocycle is a piperidine fused to one or more additional aryl or heteroaryl rings to form a 10- to 15 -membered heteroaryl, wherein said 10- to 15 -membered heteroaryl is optionally substituted with one or more R ⁵³ ; or (iii) wherein said heterocycle is a piperidine connected at a single atom to another cycloalkyl or heterocycloalkyl to form a 10- to 15 -membered spirocyclic heterocycle; and wherein said spirocyclic is optionally substituted with one or more R ⁵³ .

In some preferred embodiments, X ¹ is -NR ⁵¹ R ⁵² , wherein R ⁵¹ and R ⁵² , together with the nitrogen atom to which they are attached, combine to form a heterocycloalkyl, wherein said heterocycloalkyl is a piperidine, morpholine, 1,4-diazepane, piperazine, or an azetidine, wherein said piperidine, morpholine, 1,4-diazepane, piperazine or azetidine is optionally substituted with one or more R ⁵³ ; or wherein said wherein said piperidine, morpholine, 1,4- diazepane, piperazine or azetidine is fused to one or more additional aryl or heteroaryl rings to form a 10- to 15 -membered heteroaryl, wherein said 10- to 15 -membered heteroaryl is optionally substituted with one or more R ⁵³ ; or wherein said piperidine, morpholine, 1,4- diazepane, piperazine or azetidine is connected at a single atom to another cycloalkyl or heterocycloalkyl to form a 10- to 15 -membered spirocyclic heterocycle; and wherein said spirocyclic is optionally substituted with one or more R ⁵³ .

In another embodiment, X ¹ is -NR ⁵¹ R ⁵² , wherein R ⁵¹ and R ⁵² , together with the nitrogen atom to which they are attached, combine to form a heterocycloalkyl, wherein said heterocycloalkyl is a piperidine, morpholine, 1,4-diazepane, piperazine, or an azetidine, wherein said heterocycloalkyl is optionally substituted with one or more R ⁵³ . In another embodiment, said heterocycloalkyl is a piperidine, morpholine, 1,4-diazepane, piperazine, or an azetidine, wherein said heterocycle is fused to one or more additional aryl or heteroaryl rings to form a 10- to 15-membered heteroaryl, wherein said 10- to 15-membered heteroaryl is optionally substituted with one or more R ⁵³ . In another embodiment, said heterocycloalkyl is a piperidine, morpholine, 1,4-diazepane, piperazine, or an azetidine, and wherein said heterocycle is connected at a single atom to another cycloalkyl or heterocycloalkyl to form a 10- to 15 -membered spirocyclic heterocycle; and wherein said spirocyclic is optionally substituted with one or more R ⁵³ .

In another embodiment, X ¹ is -NR ⁵¹ R ⁵² , wherein R ⁵¹ and R ⁵² , together with the nitrogen atom to which they are attached, combine to form a heterocycloalkyl, wherein said heterocycloalkyl is a piperidine, wherein said piperidine is optionally substituted with one or more R ⁵³ . In another embodiment, said heterocycloalkyl is a piperidine, wherein said piperidine is fused to one or more additional aryl or heteroaryl rings to form a 10- to 15 -membered heteroaryl, wherein said 10- to 15 -membered heteroaryl is optionally substituted with one or more R ⁵³ . In another embodiment, said heterocycloalkyl is a piperidine, and wherein said piperidine is connected at a single atom to another cycloalkyl or heterocycloalkyl to form a 10- to 15-membered spirocyclic heterocycle; and wherein said spirocyclic is optionally substituted with one or more R ⁵³ .

In another embodiment, X ¹ is -NR ⁵¹ R ⁵² , wherein R ⁵¹ and R ⁵² , together with the nitrogen atom to which they are attached, combine to form a heterocycloalkyl, wherein said heterocycloalkyl is a morpholine, wherein said morpholine is optionally substituted with one or more R ⁵³ . In another embodiment, said heterocycloalkyl is a morpholine, wherein said morpholine is fused to one or more additional aryl or heteroaryl rings to form a 10- to 15- membered heteroaryl, wherein said 10- to 15 -membered heteroaryl is optionally substituted with one or more R ⁵³ . In another embodiment, said heterocycloalkyl is a morpholine, and wherein said morpholine is connected at a single atom to another cycloalkyl or heterocycloalkyl to form a 10- to 15 -membered spirocyclic heterocycle; and wherein said spirocyclic is optionally substituted with one or more R ⁵³ . In another embodiment, X ¹ is -NR ⁵¹ R ⁵² , wherein R ⁵¹ and R ⁵² , together with the nitrogen atom to which they are attached, combine to form a heterocycloalkyl, wherein said heterocycloalkyl is a 1,4-diazepane, wherein said 1,4-diazepane is optionally substituted with one or more R ⁵³ . In another embodiment, said heterocycloalkyl is a 1 ,4-diazepane, wherein said 1,4-diazepane is fused to one or more additional aryl or heteroaryl rings to form a 10- to 15- membered heteroaryl, wherein said 10- to 15 -membered heteroaryl is optionally substituted with one or more R ⁵³ . In another embodiment, said heterocycloalkyl is a 1,4-diazepane, and wherein said 1,4-diazepane is connected at a single atom to another cycloalkyl or heterocycloalkyl to form a 10- to 15 -membered spirocyclic heterocycle; and wherein said spirocyclic is optionally substituted with one or more R ⁵³ .

In another embodiment, X ¹ is -NR ⁵¹ R ⁵² , wherein R ⁵¹ and R ⁵² , together with the nitrogen atom to which they are attached, combine to form a heterocycloalkyl, wherein said heterocycloalkyl is a piperazine, wherein said piperazine is optionally substituted with one or more R ⁵³ . In another embodiment, said heterocycloalkyl is a piperazine, wherein said piperazine is fused to one or more additional aryl or heteroaryl rings to form a 10- to 15- membered heteroaryl, wherein said 10- to 15 -membered heteroaryl is optionally substituted with one or more R ⁵³ . In another embodiment, said heterocycloalkyl is a piperazine, and wherein said piperazine is connected at a single atom to another cycloalkyl or heterocycloalkyl to form a 10- to 15 -membered spirocyclic heterocycle; and wherein said spirocyclic is optionally substituted with one or more R ⁵³ .

In another embodiment, X ¹ is -NR ⁵¹ R ⁵² , wherein R ⁵¹ and R ⁵² , together with the nitrogen atom to which they are attached, combine to form a heterocycloalkyl, wherein said heterocycloalkyl is an azetidine, wherein said azetidine is optionally substituted with one or more R ⁵³ . In another embodiment, said heterocycloalkyl is an azetidine, wherein said azetidine is fused to one or more additional aryl or heteroaryl rings to form a 10- to 15 -membered heteroaryl, wherein said 10- to 15 -membered heteroaryl is optionally substituted with one or more R ⁵³ . In another embodiment, said heterocycloalkyl is an azetidine, and wherein said azetidine is connected at a single atom to another cycloalkyl or heterocycloalkyl to form a 10- to 15-membered spirocyclic heterocycle; and wherein said spirocyclic is optionally substituted with one or more R ⁵³ .

In another embodiment, X ¹ is -NR ⁵¹ R ⁵² , wherein R ⁵¹ and R ⁵² , together with the nitrogen atom to which they are attached, combine to form a heterocycloalkyl, wherein said heterocycloalkyl is a piperidine. P6306PC00 – 70 – In another preferred embodiment, X1 is -NR51R52, wherein R53 and R53A are independently -C1-C4 alkyl, -C1-C3 alkylene-R57A, 5- to 15-membered heterocycloalkyl, 5- to 15-membered heteroaryl, or phenyl, -OR54, -C(O)R54, -CO ₂ R54, oxo, or -NR55R56, wherein each alkylene, heterocycloalkyl, heteroaryl and phenyl is optionally substituted with one or more 5 R57; wherein R54 is independently hydrogen, -C1-C4 alkyl, -C5-C6 cycloalkyl, or phenyl; wherein each alkyl, cycloalkyl or phenyl is optionally substituted with one or more R ⁶¹ ; and R55 and R56 are each independently hydrogen, -C ₁ -C ₄ alkyl, -C ₁ -C ₄ alkylene-R61A, phenyl, -CO2C1-C6 alkyl, -S(O)2(phenyl), wherein phenyl or cycloalkyl is optionally substituted10 with one or more R61. In another preferred embodiment, X1 is -NR51R52, wherein R53 and R53A are independently -C ₁ -C ₄ alkyl, -C ₁ -C ₃ alkylene-R57A, 5- to 6-membered heterocycloalkyl, 5- to 10- membered heteroaryl, or phenyl, -OR ⁵⁴ , -C(O)R ⁵⁴ , -CO ₂ R ⁵⁴ , oxo, or -NR ⁵⁵ R ⁵⁶ , wherein each alkylene, heterocycloalkyl, heteroaryl and phenyl is optionally substituted with one or more15 R57; wherein R54 is independently hydrogen, -C ₁ -C ₂ alkyl, --C ₆ cycloalkyl, or phenyl; wherein each alkyl, cycloalkyl or phenyl is optionally substituted with one or more R61; and R ⁵⁵ and R ⁵⁶ are each independently hydrogen, -C1-C2 alkyl, -C1-C3 alkylene-R ^61A , phenyl, -CO ₂ C ₁ -C ₂ alkyl, -S(O) ₂ (phenyl), wherein phenyl or cycloalkyl is optionally substituted20 with one or more R61. In another preferred embodiment, X1 is -NR51R52, wherein R57 and R57A are independently -C1-C6 alkyl, 3-10 membered heterocycloalkyl, phenyl, 5-10 membered heteroaryl, oxo, halogen, -OH, or -SO ₂ NH ₂ , wherein each alkyl, heterocycloalkyl, phenyl, and heteroaryl is optionally substituted with one or more R ⁶¹ . 25 In another preferred embodiment, X1 is -NR51R52, wherein R57 and R57A are independently -C ₁ -C ₂ alkyl, 5-6 membered heterocycloalkyl, phenyl, 5-10 membered heteroaryl, oxo, halogen, -OH, or -SO ₂ NH ₂ , wherein each alkyl, heterocycloalkyl, phenyl, and heteroaryl is optionally substituted with one or more R61. In another preferred embodiment, X1 is -NR51R52, wherein R61 and R61A are30 independently -C ₁ -C ₂ alkyl, phenyl, -C ₁ -C ₂ alkoxy, -C ₁ -C ₂ haloalkyl, or halogen. In some preferred embodiments, X1 is -NR51R52, wherein R51 and R52, together with the nitrogen atom to which they are attached, combine to form a heterocycloalkyl, wherein said heterocycle is a piperazine or piperidine, wherein each piperazine or piperidine is optionally substituted with one or more R53; R53 is -C ₁ -C ₆ alkyl, -C ₃ -C ₆ cycloalkyl, 3-10 membered P6306PC00 – 71 – heterocycloalkyl, -C6-C10 aryl, 5-10 membered heteroaryl, -OR54, or -NR55R56, wherein each alkyl, cycloalkyl, heterocycloalkyl, aryl, or heteroaryl is optionally substituted with one or more R57; R54 is independently hydrogen, -C ₆ -C ₁₀ aryl, or -C ₅ -C ₆ cycloalkyl, wherein each aryl or cycloalkyl is optionally substituted with one or more R61; R55 and R56 are each independently 5 hydrogen, -C1-C6 alkyl, -C6-C10 aryl, -S(O)2C6-C10 aryl, or -C(O)O -C1-C6 alkyl; wherein each alkyl or aryl is optionally substituted with one or more R61; R57 is independently -C1-C6 alkyl, 3-10 membered heterocycloalkyl, -C6-C10 aryl, 5-10 membered heteroaryl, oxo, halogen, -OH, or -SO ₂ NH ₂ , wherein each alkyl, heterocycloalkyl, aryl, and heteroaryl is optionally substituted with one or more R61; and R61 is independently -C1-C6 alkyl, -C6-C10 aryl, 5-10 membered 10 heteroaryl, -C ₁ -C ₆ alkoxy, -C ₁ -C ₆ haloalkyl, or halogen. In some preferred embodiments, X1 is -NR51R52, wherein R51 and R52, together with the nitrogen atom to which they are attached, combine to form a heterocycloalkyl, wherein said heterocycle is a piperidine, wherein said piperidine is optionally substituted with one or more R53; R53 is -C ₁ -C ₆ alkyl, -C ₃ -C ₆ cycloalkyl, 3-10 membered heterocycloalkyl, -C ₆ -C ₁₀ aryl, 5- 15 10 membered heteroaryl, -OR54, or -NR55R56, wherein each alkyl, cycloalkyl, heterocycloalkyl, aryl, or heteroaryl is optionally substituted with one or more R57; R54 is independently hydrogen or -C ₆ -C ₁₀ aryl; R55 and R56 are each independently hydrogen, -C ₁ -C ₆ alkyl, -C ₆ -C ₁₀ aryl, - S(O)2C6-C10 aryl, or -C(O)OC1-C6 alkyl; wherein each alkyl or aryl is optionally substituted with one or more R61; R57 is independently -C ₁ -C ₆ alkyl, 3-10 membered heterocycloalkyl, -C ₆ - 20 C10 aryl, 5-10 membered heteroaryl, oxo, halogen, -OH, or -SO2NH2, wherein each alkyl, heterocycloalkyl, aryl, and heteroaryl is optionally substituted with one or more R61; and R61 is independently -C1-C6 alkyl, -C6-C10 aryl, 5-10 membered heteroaryl, -C1-C6 alkoxy, -C1-C6 haloalkyl, or halogen. In some preferred embodiments, X ¹ is -NR ⁵¹ R ⁵² , wherein R ⁵¹ and R ⁵² , together with the 25 nitrogen atom to which they are attached, combine to form a heterocycloalkyl, wherein said heterocycle is a piperidine, wherein said piperidine is optionally substituted with one or more R53; R53 is -C ₁ -C ₄ alkyl, -C ₃ -C ₆ cycloalkyl, 3-10 membered heterocycloalkyl, phenyl, 5-10 membered heteroaryl, -OR54, or -NR55R56, wherein each alkyl, cycloalkyl, heterocycloalkyl, phenyl, or heteroaryl is optionally substituted with one or more R57; R54 is independently30 hydrogen or phenyl; R ⁵⁵ and R ⁵⁶ are each independently hydrogen, -C ₁ -C ₄ alkyl, phenyl, -S(O) ₂ phenyl; or -C(O)OC1-C4 alkyl; R57 is independently -C1-C4 alkyl, 3-10 membered heterocycloalkyl, phenyl, 5-10 membered heteroaryl, oxo, fluorine, chlorine, -OH, or -SO ₂ NH ₂ , wherein each alkyl, heterocycloalkyl, aryl, and heteroaryl is optionally substituted with one or more R ⁶¹ ; and R ⁶¹ is independently -C1-C4 alkyl, phenyl, 5-10 membered heteroaryl, -C1-C4 alkoxy, -C1-C4 haloalkyl, fluorine or chlorine.

In some preferred embodiments, X ¹ is -NR ⁵¹ R ⁵² , wherein R ⁵¹ and R ⁵² , together with the nitrogen atom to which they are attached, combine to form a heterocycloalkyl, wherein said heterocycle is a piperidine, wherein said piperidine is optionally substituted with one or more R ⁵³ ; R ⁵³ is -C1-C2 alkyl, -Cs-Ce cycloalkyl, 3-10 membered heterocycloalkyl, phenyl, 5-10 membered heteroaryl, -OR ⁵⁴ , or -NR ⁵⁵ R ⁵⁶ , wherein each alkyl, cycloalkyl, heterocycloalkyl, phenyl, or heteroaryl is optionally substituted with one or more R ⁵⁷ ; R ⁵⁴ is independently hydrogen or phenyl; R ⁵⁵ and R ⁵⁶ are each independently hydrogen, -C1-C2 alkyl, phenyl, -S(O)2 phenyl; or -C(O)OCi-C4 alkyl; R ⁵⁷ is independently -C1-C2 alkyl, 3-10 membered heterocycloalkyl, phenyl, 5-10 membered heteroaryl, oxo, fluorine, chlorine, -OH, or -SO2NH2, wherein each alkyl, heterocycloalkyl, phenyl, and heteroaryl is optionally substituted with one or more R ⁶¹ ; and R ⁶¹ is independently -C1-C2 alkyl, phenyl, 5-10 membered heteroaryl, -C1-C2 alkoxy, -C1-C2 haloalkyl, fluorine or chlorine.

In some preferred embodiments, X ¹ is -NR ⁵¹ R ⁵² , wherein R ⁵¹ and R ⁵² , together with the nitrogen atom to which they are attached, combine to form a heterocycloalkyl, wherein said heterocycle is a piperidine, wherein said piperidine is optionally substituted with one or two R ⁵³ , preferably wherein said piperidine is substituted at the 4-position only; R ⁵³ is -C1-C2 alkyl, -Cs-Ce cycloalkyl, 3-10 membered heterocycloalkyl, phenyl, 5-10 membered heteroaryl, -OR ⁵⁴ , or -NR ⁵⁵ R ⁵⁶ , wherein each alkyl, cycloalkyl, heterocycloalkyl, phenyl, or heteroaryl is optionally substituted with one or more R ⁵⁷ ; R ⁵⁴ is independently hydrogen or phenyl; R ⁵⁵ and R ⁵⁶ are each independently hydrogen, -C1-C2 alkyl, phenyl, -S(O)2 phenyl; or -C(O)OCi-C4 alkyl; R ⁵⁷ is independently -C1-C2 alkyl, 3-10 membered heterocycloalkyl, phenyl, 5-10 membered heteroaryl, oxo, fluorine, chlorine, -OH, or -SO2NH2, wherein each alkyl, heterocycloalkyl, phenyl, and heteroaryl is optionally substituted with one or more R ⁶¹ ; and R ⁶¹ is independently -C1-C2 alkyl, phenyl, 5-10 membered heteroaryl, -C1-C2 alkoxy, -C1-C2 haloalkyl, fluorine or chlorine.

In some preferred embodiments, X ¹ is -NR ⁵¹ R ⁵² , wherein R ⁵¹ and R ⁵² , together with the nitrogen atom to which they are attached, combine to form a heterocycloalkyl, wherein said heterocycle is a piperidine, wherein said piperidine is substituted with exactly one R ⁵³ at the 4- position; R ⁵³ is -NR ⁵⁵ R ⁵⁶ , wherein R ⁵⁵ and R ⁵⁶ are each independently -C1-C2 alkyl, or phenyl.

In some preferred embodiments, X ¹ is -NR ⁵¹ R ⁵² , wherein R ⁵¹ and R ⁵² , together with the nitrogen atom to which they are attached, combine to form a heterocycloalkyl, wherein said heterocycle is a piperidine fused to an indole to form a 2,3,4,5-tetrahydro-lH-pyrido[4,3- b]indole, wherein said 2,3,4,5-tetrahydro-lH-pyrido[4,3-b]indole is optionally substituted with one or more R ⁵³ . In some embodiments, said heterocycloalkyl is a piperidine fused to an indole to form a 2,3,4,5-tetrahydro-lH-pyrido[4,3-b]indole.

In some preferred embodiments, X ¹ is -NR ⁵¹ R ⁵² , wherein R ⁵¹ and R ⁵² , together with the nitrogen atom to which they are attached, combine to form a heterocycloalkyl, wherein said heterocycle is a piperidine connected at a single atom to another cycloalkyl or heterocycloalkyl form a 10- to 15-membered spirocyclic heterocycle, wherein said spirocyclic heterocycle is optionally substituted with one or more R ⁵³ .

In some preferred embodiments, X ¹ is -NR ⁵¹ R ⁵² , wherein R ⁵¹ and R ⁵² , together with the nitrogen atom to which they are attached, combine to form a heterocycloalkyl, wherein said heterocycle is a piperidine connected at the 4-position to form a 10- to 15-membered spirocyclic heterocycle, wherein said spirocyclic heterocycle is optionally substituted with one or more R ⁵³ .

In some preferred embodiments, X ¹ is -NR ⁵¹ R ⁵² , wherein R ⁵¹ and R ⁵² , together with the nitrogen atom to which they are attached, combine to form a heterocycloalkyl, wherein said heterocycle is a piperidine connected at the 4-position to form a 10- to 15-membered spirocyclic heterocycle, wherein said spirocyclic heterocycle is optionally substituted with one or more R ⁵³ and wherein R ⁵³ is phenyl.

In some preferred embodiments, X ¹ is -NR ⁵¹ R ⁵² , wherein R ⁵¹ and R ⁵² , together with the nitrogen atom to which they are attached, combine to form a heterocycloalkyl, wherein said heterocycle is an azetidine, wherein said azetidine is optionally substituted with one or more R ⁵³ .

In some preferred embodiments, X ¹ is -NR ⁵¹ R ⁵² , wherein R ⁵¹ and R ⁵² , together with the nitrogen atom to which they are attached, combine to form a heterocycloalkyl, wherein said heterocycle is an azetidine, wherein said azetidine is optionally substituted with one or more R ⁵³ and R ⁵³ is 5- to 10-membered heteroaryl or -NR ⁵⁵ R ⁵⁶ ; and R ⁵⁵ and R ⁵⁶ are each independently hydrogen or phenyl, wherein said phenyl is optionally substituted with halogen, preferably fluorine or chlorine, more preferably fluorine.

In some preferred embodiments, X ¹ is -NR ⁵¹ R ⁵² , wherein R ⁵¹ and R ⁵² , together with the nitrogen atom to which they are attached, combine to form a heterocycloalkyl, wherein said heterocycle is an azetidine, wherein said azetidine is optionally substituted at the 3 -position with one or more R ⁵³ and R ⁵³ is 5- to 10-membered heteroaryl or -NR ⁵⁵ R ⁵⁶ ; and R ⁵⁵ and R ⁵⁶ are each independently hydrogen or phenyl, wherein said phenyl is optionally substituted with halogen, preferably fluorine or chlorine, more preferably fluorine. In some preferred embodiments, X ¹ is -NR ⁵¹ R ⁵² , wherein R ⁵¹ and R ⁵² , together with the nitrogen atom to which they are attached, combine to form a heterocycloalkyl, wherein said heterocycle is a 1,4-diazepane, wherein said 1,4-diazepane is optionally substituted with one or more R ⁵³ .

In some preferred embodiments, X ¹ is -NR ⁵¹ R ⁵² , wherein R ⁵¹ and R ⁵² , together with the nitrogen atom to which they are attached, combine to form a heterocycloalkyl, wherein said heterocycle is a [1,4-diazepane, wherein said 1,4-diazepane is optionally substituted with one or more R ⁵³ ; and R ⁵³ is phenyl, wherein said phenyl is optionally substituted with halogen, preferably fluorine or chlorine, more preferably fluorine.

In some preferred embodiments, X ¹ is -NR ⁵¹ R ⁵² , wherein R ⁵¹ is -H, and R ⁵² is -Cs-Ce heterocycle, -Ce-Cio aryl, -Ci-Ce alkylene-Cs-Ce heterocycle or -C1-C4 alkylene-Ce-Cio aryl; wherein each heterocycle or aryl is optionally substituted with one or more R ⁵³ .

In some preferred embodiments, X ¹ is -NR ⁵¹ R ⁵² , R ⁵¹ is -H, R ⁵² is piperidine, piperazine, morpholine, pyrrolidine, -C1-C4 alkylene-piperidine, -C1-C4 alkylene-piperazine, -C1-C4 alkyl ene-morpho line, or -C1-C4 alkyl ene-pyrrolidine; wherein each piperidine, piperazine morpholine or pyrrolidine is optionally substituted with one or more -C1-C2 alkyl.

In some preferred embodiments, X ¹ is -NR ⁵¹ R ⁵² , R ⁵¹ is -H, R ⁵² is piperidine, piperazine, morpholine, pyrrolidine, -C1-C2 alkylene-piperidine, -C1-C2 alkylene-piperazine, -C1-C2 alkyl ene-morpho line, or -C1-C2 alkyl ene-pyrrolidine; wherein each piperidine, piperazine morpholine or pyrrolidine is optionally substituted with one or more -C1-C2 alkyl.

In some preferred embodiments, X ¹ is -NR ⁵¹ R ⁵² , R ⁵¹ is -H, R ⁵² is piperidine, piperazine, morpholine, pyrrolidine, -C1-C2 alkylene-piperidine, -C1-C2 alkylene-piperazine, -C1-C2 alkyl ene-morpho line, or -C1-C2 alkylene-pyrrolidine; wherein each piperidine, piperazine or pyrrolidine is optionally substituted at the 4-position with one or more -C1-C2 alkyl.

In some preferred embodiments, X ¹ is -NR ⁵¹ R ⁵² , R ⁵¹ is -H, R ⁵² is piperidine or -C1-C2 alkylene-piperidine; wherein each piperidine is optionally substituted at the 4-position with one or more -C1-C2 alkyl.

In some preferred embodiments, X ¹ is -NR ⁵¹ R ⁵² , R ⁵¹ is -H, and R ⁵² is phenyl or -C1-C4 alkylene-phenyl; wherein each phenyl is optionally substituted with one or more R ⁵³ .

In some preferred embodiments, X ¹ is -NR ⁵¹ R ⁵² , R ⁵¹ is -H, and R ⁵² is phenyl or -C1-C4 alkylene-phenyl; wherein each phenyl is optionally substituted with one or more R ⁵³ ; wherein R ⁵³ is -C1-C2 alkyl optionally substituted by one or more -C5-C6 heterocycloalkyl; and wherein said heterocycloalkyl can be further substituted with one or more -C1-C2 alkyl. In some preferred embodiments, X1 is -NR51R52, R51 is -H, and R52 is phenyl or -C1-C3 alkylene-phenyl; wherein each phenyl is optionally substituted with one or more R53; wherein R53 is -C ₁ -C ₂ alkyl optionally substituted by one or more piperidine or piperazine; and wherein said piperidine or piperazine can be further substituted with one or more -C1-C2 alkyl. 5 In some preferred embodiments, X1 is -NR51R52, wherein R51 is -H, and R52 is -C1-C4 alkyl, wherein each alkyl is optionally substituted by one or more -CO2C1-C4 alkyl, -OC1-C4 alkyl, -N(C1-C4 alkyl)2, or -C5-C6 heterocycloalkyl, preferably wherein said heterocycloalkyl is optionally substituted with one or more -C ₁ -C ₂ alkyl. In some preferred embodiments, X1 is -NR51R52, R51 is -H, and R52 is -C1-C4 alkyl,10 wherein each alkyl is optionally substituted by one or more -CO ₂ C ₁ -C ₄ alkyl, -OC ₁ -C ₄ alkyl, - N(C1-C4 alkyl)2, piperidine, morpholine, or piperazine; preferably wherein said piperidine or piperazine is optionally substituted with one or more -C ₁ -C ₂ alkyl at the 4-position. In some embodiments, X ¹ is -NR ⁵¹ R ⁵² , wherein R ⁵¹ and R ⁵² , together with the nitrogen atom to which they are attached, combine to form a 3-15 membered heterocycloalkyl, wherein 15 said heterocycloalkyl is optionally fused to one or more additional aryl or heteroaryl rings or said heterocycloalkyl is optionally connected at a single atom to another cycloalkyl or heterocycloalkyl to form a 10- to 15-membered spirocyclic heterocycle, or said heterocycloalkyl optionally comprises a C2 bridging alkylene; and wherein said 3-15 membered heterocycloalkyl is optionally substituted with one or more, preferably one or two, R53; 20 R53 is independently selected from -C1-C6 alkyl, -C3-C6 cycloalkyl, -C1-C6 alkylene-C3- C ₆ cycloalkyl, -C ₆ -C ₁₀ aryl, -C ₁ -C ₆ alkylene-C ₆ -C ₁₀ aryl, 3-10 membered heterocycloalkyl, -C ₁ - C6 alkylene-3-10 membered heterocycloalkyl, 5-10 membered heteroaryl, -C1-C6 alkylene-5- 10 membered heteroaryl, -NR55R56, -OR54, or oxo; wherein each alkylene is optionally substituted with one or more oxo or -OH; 25 wherein each alkyl, cycloalkyl, aryl, heterocycloalkyl, or heteroaryl is optionally substituted with one or more -C ₁ -C ₆ alkyl, -C ₁ -C ₆ haloalkyl, halogen, -NH ₂ , -NH(C ₁ -C ₆ alkyl), -N(C ₁ -C ₆ alkyl) ₂ , -OH, -OCH ₃ , -OCH ₂ CH ₂ OH, -SO ₂ NH ₂ , phenyl, or oxo; R55 and R56 are each independently -H, -C1-C6 alkyl, -CO2C1-C6 alkyl, -SO2phenyl, - C6-C10 aryl, or 5- to 6-membered heteroaryl, wherein each -C6-C10 aryl or 5- to 6-membered30 heteroaryl is optionally substituted with one or more -C ₁ -C ₆ alkyl, halogen -OC ₁ -C ₆ alkyl, or - CN; and R54 is independently -H, -C ₁ -C ₆ alkyl, -C ₆ -C ₁₀ aryl or -C ₅ -C ₆ cycloalkyl, wherein said cycloalkyl is optionally substituted by one or more -C1-C6 alkyl. In some embodiments, X1 is -NR51R52, wherein R51 and R52, together with the nitrogen atom to which they are attached, combine to form a 3-15 membered heterocycloalkyl, wherein said heterocycloalkyl is optionally fused to one or more additional aryl or heteroaryl rings or said heterocycloalkyl is optionally connected at a single atom to another cycloalkyl or 5 heterocycloalkyl to form a 10- to 15-membered spirocyclic heterocycle, or said heterocycloalkyl optionally comprises a C2 bridging alkylene; and wherein said 3-15 membered heterocycloalkyl is optionally substituted with one or more, preferably one or two, R ⁵³ ; R53 is independently selected from -C ₁ -C ₆ alkyl, -C ₃ -C ₆ cycloalkyl, -C ₁ -C ₆ alkylene-C ₃ - C6 cycloalkyl, -C6-C10 aryl, -C1-C6 alkylene-C6-C10 aryl, -C(O)-C6-C10 aryl, 3-10 membered 10 heterocycloalkyl, -C ₁ -C ₆ alkylene-3-10 membered heterocycloalkyl, 5-10 membered heteroaryl, -C1-C6 alkylene-5-10 membered heteroaryl, -CH(OH)-5-10 membered heteroaryl, - NR55R56, -OR54, or oxo; wherein said -C ₁ -C ₆ alkyl is optionally substituted with one or more -NH ₂ , -NH(C ₁ -C ₆ alkyl), -N(C ₁ -C ₆ alkyl) ₂ , -OH, -OCH ₂ CH ₂ OH, or phenyl; 15 wherein each aryl is optionally substituted with one or more -C1-C6 alkyl, -C1-C6 haloalkyl, phenyl, halogen, -OH, -OCH ₃ , or -SO ₂ NH ₂ ; wherein each heterocycloalkyl is optionally substituted with one or more -C ₁ -C ₆ alkyl or oxo; wherein each heteroaryl is optionally substituted with one or more oxo, -C ₁ -C ₆ alkyl, -20 C1-C6 haloalkyl, or halogen; R55 and R56 are each independently -H, -C ₁ -C ₆ alkyl, -CO ₂ C ₁ -C ₆ alkyl, -SO ₂ phenyl, - C6-C10 aryl, or 5- to 6-membered heteroaryl, wherein each -C6-C10 aryl or 5- to 6-membered heteroaryl is optionally substituted with one or more -C ₁ -C ₆ alkyl, halogen -OC ₁ -C ₆ alkyl, or - CN; and 25 R54 is independently -H, -C6-C10 aryl or -C5-C6 cycloalkyl, wherein said cycloalkyl is optionally substituted by one or more -C ₁ -C ₆ alkyl. In some embodiments, X1 is -NR51R52, wherein R51 and R52, together with the nitrogen atom to which they are attached, combine to form a 3-15 membered heterocycloalkyl, wherein said heterocycloalkyl is optionally fused to one or more additional aryl or heteroaryl rings or 30 said heterocycloalkyl is optionally connected at a single atom to another cycloalkyl or heterocycloalkyl to form a 10- to 15-membered spirocyclic heterocycle, or said heterocycloalkyl optionally comprises a C ₂ bridging alkylene; and wherein said 3-15 membered heterocycloalkyl is optionally substituted with one or more, preferably one or two, R53; P6306PC00 – 77 – R53 is independently selected from -C1-C4 alkyl, -C3-C6 cycloalkyl, -C1-C4 alkylene-C3- C6 cycloalkyl, -C6-C10 aryl, -C1-C4 alkylene-C6-C10 aryl, -C(O)-C6-C10 aryl, 3-10 membered heterocycloalkyl, -C ₁ -C ₄ alkylene-3-10 membered heterocycloalkyl, 5-10 membered heteroaryl, -C1-C4 alkylene-5-10 membered heteroaryl, -CH(OH)-5-10 membered heteroaryl, - 5 NR55R56, -OR54, or oxo; wherein said -C1-C4 alkyl is optionally substituted with one or more -NH2, -NH(C1-C4 alkyl), -N(C1-C4 alkyl)2, -OH, -OCH2CH2OH, or phenyl; wherein each aryl is optionally substituted with one or more -C ₁ -C ₄ alkyl, -C ₁ -C ₄ haloalkyl, phenyl, halogen, -OH, -OCH3, or -SO2NH2; 10 wherein each heterocycloalkyl is optionally substituted with one or more -C ₁ -C ₄ alkyl or oxo; wherein each heteroaryl is optionally substituted with one or more oxo, -C ₁ -C ₄ alkyl, - C ₁ -C ₄ haloalkyl, or halogen; R55 and R56 are each independently -H, -C ₁ -C ₄ alkyl, -CO ₂ C ₁ -C ₄ alkyl, -SO ₂ phenyl, - 15 C6-C10 aryl, or 5- to 6-membered heteroaryl, wherein each -C6-C10 aryl or 5- to 6-membered heteroaryl is optionally substituted with one or more -C ₁ -C ₄ alkyl, halogen -OC ₁ -C ₄ alkyl, or - CN; and R ⁵⁴ is independently -H, -C6-C10 aryl or -C5-C6 cycloalkyl, wherein said cycloalkyl is optionally substituted by one or more -C ₁ -C ₄ alkyl. 20 In some embodiments, X1 is -NR51R52, wherein R51 and R52, together with the nitrogen atom to which they are attached, combine to form a 3-15 membered heterocycloalkyl, wherein said heterocycloalkyl is optionally fused to one or more additional aryl or heteroaryl rings or said heterocycloalkyl is optionally connected at a single atom to another cycloalkyl or heterocycloalkyl to form a 10- to 15-membered spirocyclic heterocycle, or said 25 heterocycloalkyl optionally comprises a C2 bridging alkylene; and wherein said 3-15 membered heterocycloalkyl is optionally substituted with one or more, preferably one or two, R53; R53 is independently selected from -C ₁ -C ₄ alkyl, -C ₃ -C ₆ cycloalkyl, -C ₁ -C ₄ alkylene-C ₃ - C6 cycloalkyl, -C6-C10 aryl, -C1-C4 alkylene-C6-C10 aryl, -C(O)-C6-C10 aryl, 3-10 membered heterocycloalkyl, -C1-C4 alkylene-3-10 membered heterocycloalkyl, 5-10 membered30 heteroaryl, -C ₁ -C ₄ alkylene-5-10 membered heteroaryl, -CH(OH)-5-10 membered heteroaryl, - NR55R56, -OR54, or oxo; wherein said -C ₁ -C ₄ alkyl is optionally substituted with one or more -N(C ₁ -C ₄ alkyl) ₂ , - OH, -OCH2CH2OH, or phenyl; wherein each aryl is optionally substituted with one or more -C1-C4 alkyl, -C1-C4 haloalkyl, phenyl, halogen, -OCH3, or -SO2NH2; wherein each heterocycloalkyl is optionally substituted with one or more -C1-C4 alkyl or oxo; wherein each heteroaryl is optionally substituted with one or more oxo, -C1-C4 alkyl, - C1-C4 haloalkyl, or halogen;

R ⁵⁵ and R ⁵⁶ are each independently -H, -C1-C4 alkyl, -CO2C1-C4 alkyl, -SChphenyl, - Ce-Cio aryl, or 5- to 6-membered heteroaryl, wherein each -Ce-Cio aryl or 5- to 6-membered heteroaryl is optionally substituted with one or more -C1-C4 alkyl, halogen -OC1-C4 alkyl, or - CN; and

R ⁵⁴ is independently -H, -Ce-Cio aryl or -C5-C6 cycloalkyl, wherein said cycloalkyl is optionally substituted by one or more -C1-C4 alkyl.

In some embodiments, X ¹ is -NR ⁵¹ R ⁵² , wherein R ⁵¹ and R ⁵² , together with the nitrogen atom to which they are attached, combine to form a 3-15 membered heterocycloalkyl, wherein said heterocycloalkyl is optionally fused to one or more additional aryl or heteroaryl rings or said heterocycloalkyl is optionally connected at a single atom to another cycloalkyl or heterocycloalkyl to form a 10- to 15-membered spirocyclic heterocycle, or said heterocycloalkyl optionally comprises a C2 bridging alkylene; and wherein said 3-15 membered heterocycloalkyl is optionally substituted with one or more, preferably one or two, R ⁵³ ;

R ⁵³ is independently selected from -C1-C4 alkyl, -C3-C6 cycloalkyl, -C1-C3 alkylene-C3- Ce cycloalkyl, -Ce-Cio aryl, -C1-C3 alkyl ene-Ce-C 10 aryl, -C(0)-Ce-Cio aryl, 3-10 membered heterocycloalkyl, -C1-C3 alkylene-3-10 membered heterocycloalkyl, 5-10 membered heteroaryl, -C1-C3 alkylene-5-10 membered heteroaryl, -CH(OH)-5-10 membered heteroaryl, - NR ⁵⁵ R ⁵⁶ , -OR ⁵⁴ , or oxo; wherein said -C1-C4 alkyl is optionally substituted with one or more -N(CI-C2 alkyl)2, - OH, -OCH2CH2OH, or phenyl; wherein each aryl is optionally substituted with one or more -C1-C2 alkyl, -C1-C2 haloalkyl, phenyl, halogen, -OCH3, or -SO2NH2; wherein each heterocycloalkyl is optionally substituted with one or more -C1-C2 alkyl or oxo; wherein each heteroaryl is optionally substituted with one or more oxo, -C1-C2 alkyl, - C1-C2 haloalkyl, or halogen;

R ⁵⁵ and R ⁵⁶ are each independently -H, -C1-C2 alkyl, -CO2C1-C4 alkyl, -SChphenyl, - Ce-Cio aryl, or 5- to 6-membered heteroaryl, wherein each -Ce-Cio aryl or 5- to 6-membered P6306PC00 – 79 – heteroaryl is optionally substituted with one or more -C1-C2 alkyl, halogen -OC1-C2 alkyl, or - CN; and R54 is independently -H, -C ₆ -C ₁₀ aryl or -C ₅ -C ₆ cycloalkyl, wherein said cycloalkyl is optionally substituted by one or more -C1-C2 alkyl. 5 In some embodiments, X1 is -NR51R52, wherein R51 and R52, together with the nitrogen atom to which they are attached, combine to form a membered heterocycloalkyl, wherein said heterocycloalkyl is selected from azetidine, pyrrolidine, imidazolidine, piperidine, piperazine, morpholine, or 1,4-diazepane, wherein said azetidine, pyrrolidine, imidazolidine, piperidine, piperazine, morpholine, or 1,4-diazepane is optionally fused to one or more additional aryl or 10 heteroaryl rings or said heterocycloalkyl is optionally connected at a single atom to another cycloalkyl or heterocycloalkyl to form a 10- to 15-membered spirocyclic heterocycle, or said heterocycle is piperidine optionally comprising a C ₂ bridging alkylene; and wherein said heterocycloalkyl is further optionally substituted with one or more, preferably one or two, R ⁵³ ; R53 is independently selected from -C ₁ -C ₄ alkyl, -C ₃ -C ₆ cycloalkyl, -C ₁ -C ₃ alkylene-C ₃ - 15 C6 cycloalkyl, -C6-C10 aryl, -C1-C3 alkylene-C6-C10 aryl, -C(O)-C6-C10 aryl, 3-10 membered heterocycloalkyl, -C ₁ -C ₃ alkylene-3-10 membered heterocycloalkyl, 5-10 membered heteroaryl, -C ₁ -C ₃ alkylene-5-10 membered heteroaryl, -CH(OH)-5-10 membered heteroaryl, - NR ⁵⁵ R ⁵⁶ , -OR ⁵⁴ , or oxo; wherein said -C ₁ -C ₄ alkyl is optionally substituted with one or more -N(C ₁ -C ₂ alkyl) ₂ , - 20 OH, -OCH2CH2OH, or phenyl; wherein each aryl is optionally substituted with one or more -C ₁ -C ₂ alkyl, -CF ₃ , phenyl, halogen, -OCH3, or -SO2NH2; wherein each heterocycloalkyl is optionally substituted with one or more -C ₁ -C ₂ alkyl or oxo; 25 wherein each heteroaryl is optionally substituted with one or more oxo, -C1-C2 alkyl, - CF ₃ , or halogen; R55 and R56 are each independently -H, -C ₁ -C ₂ alkyl, -CO ₂ C ₁ -C ₄ alkyl, -SO ₂ phenyl, - C6-C10 aryl, or 5- to 6-membered heteroaryl, wherein each -C6-C10 aryl or 5- to 6-membered heteroaryl is optionally substituted with one or more -C1-C2 alkyl, halogen -OC1-C2 alkyl, or - 30 CN; and R54 is independently -H, -C6-C10 aryl or -C5-C6 cycloalkyl, wherein said cycloalkyl is optionally substituted by one or more -C ₁ -C ₂ alkyl. In some embodiments, X1 is -NR51R52, wherein R51 and R52, together with the nitrogen atom to which they are attached, combine to form a membered heterocycloalkyl, wherein said P6306PC00 – 80 – heterocycloalkyl is selected from azetidine, pyrrolidine, imidazolidine, piperidine, piperazine, morpholine, or 1,4-diazepane, wherein said azetidine, pyrrolidine, imidazolidine, piperidine, piperazine, morpholine, or 1,4-diazepane is optionally fused to one or more additional aryl or heteroaryl rings or said heterocycloalkyl is optionally connected at a single atom to another 5 cycloalkyl or heterocycloalkyl to form a 10- to 15-membered spirocyclic heterocycle, or said heterocycle is piperidine optionally comprising a C2 bridging alkylene; and wherein said heterocycloalkyl is further optionally substituted with one or more, preferably one or two, R ⁵³ , and wherein when said heterocycloalkyl is azetidine, said azetidine is substituted at the 3- position and when said heterocycloalkyl is piperidine or piperazine, said piperidine or 10 piperazine is substituted at the 4-position; R53 is independently selected from -C1-C4 alkyl, -C3-C6 cycloalkyl, -C1-C3 alkylene-C3- C ₆ cycloalkyl, -C ₆ -C ₁₀ aryl, -C ₁ -C ₃ alkylene-C ₆ -C ₁₀ aryl, -C(O)-C ₆ -C ₁₀ aryl, 3-10 membered heterocycloalkyl, -C ₁ -C ₃ alkylene-3-10 membered heterocycloalkyl, 5-10 membered heteroaryl, -C ₁ -C ₃ alkylene-5-10 membered heteroaryl, -CH(OH)-5-10 membered heteroaryl, - 15 NR55R56, -OR54, or oxo; wherein said -C ₁ -C ₄ alkyl is optionally substituted with one or more -N(C ₁ -C ₂ alkyl) ₂ , - OH, -OCH ₂ CH ₂ OH, or phenyl; wherein each aryl is optionally substituted with one or more -C1-C2 alkyl, -CF3, phenyl, halogen, -OCH ₃ , or -SO ₂ NH ₂ ; 20 wherein each heterocycloalkyl is optionally substituted with one or more -C1-C2 alkyl or oxo; wherein each heteroaryl is optionally substituted with one or more oxo, -C1-C2 alkyl, - CF ₃ , or halogen; R ⁵⁵ and R ⁵⁶ are each independently -H, -C1-C2 alkyl, -CO2C1-C4 alkyl, -SO2phenyl, - 25 C6-C10 aryl, or 5- to 6-membered heteroaryl, wherein each -C6-C10 aryl or 5- to 6-membered heteroaryl is optionally substituted with one or more -C ₁ -C ₂ alkyl, halogen -OC ₁ -C ₂ alkyl, or - CN; and R54 is independently -H, -C6-C10 aryl or -C5-C6 cycloalkyl, wherein said cycloalkyl is optionally substituted by one or more -C1-C2 alkyl. 30 In some embodiments, X ¹ is -NR ⁵¹ R ⁵² , wherein R ⁵¹ and R ⁵² , together with the nitrogen atom to which they are attached, combine to form a membered heterocycloalkyl, wherein said heterocycloalkyl is selected from azetidine, pyrrolidine, imidazolidine, piperidine, piperazine, morpholine, or 1,4-diazepane, wherein said heterocycloalkyl is further optionally substituted with one or more, preferably one or two, R53; P6306PC00 – 81 – R53 is independently selected from -C1-C4 alkyl, -C3-C6 cycloalkyl, -C1-C3 alkylene-C3- C6 cycloalkyl, -C6-C10 aryl, -C1-C3 alkylene-C6-C10 aryl, -C(O)-C6-C10 aryl, 3-10 membered heterocycloalkyl, -C ₁ -C ₃ alkylene-3-10 membered heterocycloalkyl, 5-10 membered heteroaryl, -C1-C3 alkylene-5-10 membered heteroaryl, -CH(OH)-5-10 membered heteroaryl, - 5 NR55R56, -OR54, or oxo; wherein said -C1-C4 alkyl is optionally substituted with one or more -N(C1-C2 alkyl)2, - OH, -OCH2CH2OH, or phenyl; wherein each aryl is optionally substituted with one or more -C ₁ -C ₂ alkyl, -CF ₃ , phenyl, halogen, -OCH3, or -SO2NH2; 10 wherein each heterocycloalkyl is optionally substituted with one or more -C ₁ -C ₂ alkyl or oxo; wherein each heteroaryl is optionally substituted with one or more oxo, -C ₁ -C ₂ alkyl, - CF ₃ , or halogen; R55 and R56 are each independently -H, -C ₁ -C ₂ alkyl, -CO ₂ C ₁ -C ₄ alkyl, -SO ₂ phenyl, - 15 C6-C10 aryl, or 5- to 6-membered heteroaryl, wherein each -C6-C10 aryl or 5- to 6-membered heteroaryl is optionally substituted with one or more -C ₁ -C ₂ alkyl, halogen -OC ₁ -C ₂ alkyl, or - CN; and R ⁵⁴ is independently -H, -C6-C10 aryl or -C5-C6 cycloalkyl, wherein said cycloalkyl is optionally substituted by one or more -C ₁ -C ₂ alkyl. 20 In one aspect, the present invention provides a pharmaceutical composition comprising at least one compound according to the present disclosure, or a pharmaceutically acceptable salt, tautomer, solvate or hydrate thereof, and a pharmaceutically acceptable excipient. In one aspect, the present invention provides a compound according to the present disclosure or a pharmaceutically acceptable salt, tautomer, solvate or hydrate thereof, or a 25 pharmaceutical composition comprising a compound of the present disclosure, for use in a method of preventing or treating a disease in a subject, preferably an infection, further preferably a bacterial infection, yet further preferably a bacterial infection caused by one or more bacterium belonging to a genus of non-tuberculous Mycobacteria, preferably M. abscessus. 30 In one aspect, the present invention provides a method of treating a bacterial infection in a subject in need thereof, comprising administering to the subject an effective amount of a compound of the present disclosure or a pharmaceutically acceptable salt, tautomer, solvate, or hydrate thereof. In one aspect, the present invention provides a method of treating a bacterial infection in a subject in need thereof, comprising administering to the subject an effective amount of a pharmaceutical composition comprising a compound of the present disclosure or a pharmaceutically acceptable salt, tautomer, solvate, or hydrate thereof.

In one aspect, the present invention provides the use of a compound of the present disclosure or a pharmaceutically acceptable salt, tautomer, solvate, or hydrate thereof in the manufacture of a medicament for treating a bacterial infection in a subject in need thereof. In one aspect, the present invention provides the use of a pharmaceutical composition comprising a compound of the present disclosure or a pharmaceutically acceptable salt, tautomer, solvate, or hydrate thereof in the manufacture of a medicament for treating a bacterial infection in a subject in need thereof. In some embodiments, the bacterial infection is caused by one or more bacterium belonging to a genus of non-tuberculous Mycobacteria, preferably M. abscessus. In some embodiments, the bacterial infection is caused by A. baumannii. In some embodiments, the bacterial infection is caused by a strain of A. baumannii carrying a resistance mutation in the RpoB gene. In some preferred embodiments, the resistance mutation is H535Q; H535C; or H535L.

In one or more embodiments, X ¹ of a compound of the present invention can form one of the structures selected from Table 1, below:

Table 1. Exemplary Embodiments of X ¹

In one or more embodiments of any of the above aspects, the compound of Formula I is selected from Table 2, below:

In one or more embodiments of any of the above aspects, the compound of Formula I is selected from Compound 44, Compound 49, Compound 52, Compound 67, Compound 85, Compound 90, Compound 91, Compound 98, Compound 105, Compound 106, Compound 109, Compound 110, Compound 118 and Compound 121.

In one or more embodiments of any of the above aspects, the compound of Formula I is selected from Compound 67, Compound 90, Compound 98 and Compound 106.

Methods of Synthesizing the Compounds of the Invention

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.

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 and examples. 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", 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 the present disclosure.

Those skilled in the art will recognize if a stereocenter exists in the compounds of Formula I. 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. In preferred embodiments the present disclosure includes enantiomers and/or diastereomers within X ¹ and Y ¹ of Formula I. 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 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.

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. These 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 1, 2, and 3. Starting materials are either commercially available or made by known procedures in the reported literature or as illustrated. Scheme 1. General Synthesis of C21-C23-Acetal-25-OH Rifabutin (1-1)

A general method of preparing C21-C23-Acetal-25-OH rifabutin is shown above in Scheme 1. Protection of the C21 and C23 hydroxy groups using dimethoxy propane and camphorsulphonic acid in DMF afforded an acetal-protected rifabutin. De-acetylation of the protected rifabutin using sodium methoxide in ether afforded the 25-OH rifabutin with the C21 and C23 hydroxy groups protected (1-1).

Scheme 2. Preparation of the 25-OH Rifabutin Ester (1-2)

C21-C23 -protected, 25-OH rifabutin (1-1) can be esterified using an appropriate carboxylic acid such as malonic acid in the presence of a coupling reagent such as DCC. Other di-carboxylic acids (e.g., glutaric acid, succinic acid, adipic acid, methyl- or ethylmalonic acid) can be used.

Scheme 3. Preparation of Deprotected, 25-Ester or 25-Amide-Conjugated Rifabutin

The C25-esterified, protected rifabutin can be coupled to an appropriate alcohol or amine using a coupling reagent such as EDCI or COMU (preferably wherein EDCI is used for coupling to an alcohol and COMU is used for coupling to an amine). Deprotection of the C21- C23 acetal in the conjugated rifabutin can be carried out by treating with an acid such as camphorsulphonic acid in an alcohol such as methanol.

Antibacterial Efficacy of the Disclosed Compounds

The inventive compounds are C25 -modified analogs of rifabutin that exhibit broad spectrum antibacterial activity characteristic of the rifamycin class. Additionally, the inventive compounds unexpectedly showed enhanced antibacterial activity against non-tuberculous Mycobacteria including M. abscessus compared to currently available antibiotics (e.g., rifabutin). The inventive compounds also retained antibacterial activity against A. baumannii and unexpectedly showed enhanced antibacterial activity against certain strains of A. baumannii, e.g., A. baumannii carrying one or more resistance mutations making it resistant to currently available antibiotics (e.g., rifabutin).

As shown below in Example 7, Table 5, the compounds of the disclosure are effective at inhibiting bacterial growth in strains of S. aureus, A. baumannii, and M. abscessus complex as well as other non-tuberculosis mycobacteria, i.e., M. kansasii, M. xenopi, and M. avium. Table 9 shows that the inventive compounds (e.g., Compound 3) are effective at inhibitiong bacterial growth in the strains E. faecium, E. faecalis, S. epidermidis, S. pneumoniae, M. tuberculosis, S. pyogenes, H. influenzae, and AT. smegmatis.

Example 7, Tables 6 and 7 show the activity of the inventive compounds against particular isolates of M. abscessus compared to currently available antibiotics. Table 6 shows the activity of the inventive compounds in Middlebrook 7H9 broth supplemented with Middlebrook ADC growth supplement. Table 7 shows the activity of the inventive compounds in cation adjusted Mueller Hinton broth. Rifampicin exhibited MIC values above 32 mg/L and was not considered active against M. abscessus strains. Rifabutin and 3-(4- morpholinyljrifamycin S, which are not modified on their C25 position, exhibited modest activity against the tested M. abscessus strains with MIC values ranging from 2 to 16 mg/L and 4 to 32 mg/L, respectively. In contrast, Compound 3 exhibited MIC values from 0.5 to 2 mg/L, corresponding to 8 to 16-fold increased activity over rifabutin in four of the five M. abscessus strains tested. Moreover, the C25 modified compound CGP 4832 showed lower activity (MIC from 2 to 8 mg/L) than Compound 3. Similarly, additional compounds of the invention (e.g., Compounds 85, 90, and 98) showed enhanced activity compared to rifabutin (e.g., 4 to 16-fold increase in activity) in the AT. abscessus isolates tested as shown in Table 7. Accordingly, the present disclosure teaches compounds that display increased activity against M. abscessus beyond that of antibiotics known in the literature. In some embodiments, the inventive compounds can be used to treat M. abscessus infection. In some embodiments, the M. abscessus infection is resistant to current antibiotics.

As shown in Example 7, Table 8, compounds of the invention (e.g., Compound 3) retained strong antibacterial activity against A. baumannii wild type strain and overcame antibiotic resistance mechanisms such as ADP-ribosyl transferase (Arr)-mediated resistance and RpoB mutation-mediated resistance mechanisms. In contrast to the activity of Compound 3, CGP4832 did not exhibit strong activity against A. baumannii wild type and lost activity compared with rifabutin against RpoB mutant strains.

Accordingly, in some embodiments, the inventive compounds can be used to inhibit bacterial infection, preferably infection caused by a non-tuberculous Mycobacteria, more preferably AT. abscessus. In some embodiments, the inventive compounds can be used to inhibit bacterial infection caused by A. baumannii. In some preferred embodiments, the inventive compounds can be used to treat a bacterial infection caused by a strain of bacteria that carries one or more resistance genes or resistance mechanisms against currently available antibiotics (e.g., rifampicin and/or rifabutin). In some preferred embodiments, the inventive compounds can be used to inhibit bacterial infection caused by A. baumannii, wherein the A. baumannii has a resistance mechanism, preferably a resistance mutation in the RpoB gene and/or expression of the ADP-ribosyltransferase (Arr) enzyme. In some preferred embodiments the resistance mutation in the RpoB gene is H535Q, H535C, or H535L.

Methods of Using the Disclosed Compounds

An aspect of the present disclosure relates to a method of treating a bacterial infection in a subject in need thereof, the method comprising administering to the subject a compound of the present disclosure or a pharmaceutically acceptable salt thereof. An aspect of the present disclosure relates to a compound (or a pharmaceutically acceptable salt thereof) or a pharmaceutical composition as described herein for use as a medicament. An aspect of the present disclosure relates to a compound (or a pharmaceutically acceptable salt thereol) or a pharmaceutical composition as described herein for use in a method of treating a bacterial infection in a subject. An aspect of the present disclosure relates to the use of a compound (or a pharmaceutically acceptable salt thereol) or a pharmaceutical composition as described herein in the manufacture of a medicament for treating a bacterial infection. In some preferred embodiments, the bacterial infection is caused by a bacterial strain carries one or more resistance genes or resistance mechanisms against currently available antibiotics (e.g., rifampicin and/or rifabutin).

In some embodiments, the infection is caused by one or more bacterium belonging to the genera Mycobacterium spp., Acinetobacter spp., Clostridium spp., Enterococcus spp., Hemophilus spp., Legionella spp., Neisseria spp., Staphylococcus spp., Streptococcus spp., Listeria monocytogenes, Moraxella catarrhalis, Bacillus spp., Bacteroides spp., Gardnerella vaginalis, Lactobacillus spp., Mobiluncus spp., Helicobacter pylori, Campylobacter jejuni, Chlamydia trachomatis and/or Toxoplasma gondii.

In some embodiments, the infection is caused by one or more bacterium belonging to the species M. abscessus, M. kansasii, M. xenopi, M. avium, A. baumannii, S. aureus, E. f aecium, E.faecalis, S. epidermidis,S. pneumoniae, M. tuberculosis, S. pyogenes, H. influenzae, and/or M. smegmatis.

In some preferred embodiments, the bacterial infection is caused by one or more bacterium belonging to the genus Acinetobacter, Staphylococcus, and/or Mycobacteria. In some preferred embodiments, the bacterial infection is caused by one or more bacterium belonging to the species A. baumannii, and/or 5. aureus, and/or a genus of non-tuberculous Mycobacteria, preferably M. abscessus. In preferred embodiments, the bacterial infection is caused by one or more bacterium belonging to a genus of non-tuberculous Mycobacteria, preferably M. abscessus. In some embodiments, the infection is caused by one or more bacterium belonging to the genus Acinetobacter and/or Staphylococcus, preferably A. baumannii and/or S. aureus.

In some preferred embodiments, the infection is caused by one or more bacterium belonging to a genus of non-tuberculosis Mycobacterium, preferably M. abscessus, M. avium, M. kansasii, M. xenopi and/or M. malmoense, yet more preferably M. abscessus.

In some embodiments, the infection is caused by one or more bacterium belonging to the species M. abscessus, A. baumannii, and/or S. aureus. In some embodiments, the infection is caused by one or more bacterium belonging to the species M. abscessus. In some embodiments, the infection is caused by one or more bacterium belonging to the species A. baumannii.

In some embodiments, the infection is caused by one or more bacterium belonging to the strains M. abscessus subsp. abscessus, e.g., M. abscessus subsp. abscessus strain ID No. ATCC 19977, strain ID No. CCUG 71636, or strain ID No. CCUG 71382; M. abscessus subsp. bolletii, e.g., strain ID No. CCUG 50184; and/or M. abscessus subsp. massiliense, e.g., strain ID No. CCUG 48898.

In some preferred embodiments, the compounds of the present disclosure can be used to inhibit bacterial infection caused by A. baumannii, preferably wherein the A. baumannii has a resistance mechanism making it resistant to current antibiotics, preferably wherein the resistance mechanism is a mutation in the RpoB gene and/or expression of an ADP ribosyl transferase (Arr) enzyme. In some embodiments, the infection is caused by one or more bacterium belonging to the strains A. baumannii wild type; A. baumannii Arr-2; A. baumannii RpoB H535Q mutant; A. baumannii RpoB H535C mutant; and/or A. baumannii RpoB H535L mutant.

In some preferred embodiments, the inventive compounds are used for the treatment of a non-tuberculous Mycobacteria that causes a non-tuberculous Mycobacteria pulmonary infection. Accordingly, an aspect of the present disclosure relates to a method of treating anon- tuberculous Mycobacteria pulmonary infection in a subject in need thereof, the method comprising administering to the subject a compound of the present disclosure or a pharmaceutically acceptable salt thereof. An aspect of the present disclosure relates to a compound (or a pharmaceutically acceptable salt thereol) or a pharmaceutical composition as described herein for use in a method of treating a non-tuberculous Mycobacteria pulmonary infection in a subject. An aspect of the present disclosure relates to the use of a compound (or a pharmaceutically acceptable salt thereof) or a pharmaceutical composition as described herein in the manufacture of a medicament for treating a non-tuberculous Mycobacteria pulmonary infection in a subject. In some embodiments the non-tuberculosis Mycobacterium is M. abscessus, M. avium, M. kansasii, M. xenopi and/or M. malmoense.

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 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, magnesium carbonate, natural sugars such as glucose or beta-lactose, com 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, algiic acid or its sodium salt, or effervescent mixtures; e) absorbent, colorant, flavorant and sweetener; 1) an emulsifier or dispersing agent, such as Tween 80, Labrasol, HPMC, DOSS, caproyl 909, labrafac, labrafil, peceol, transcutol, capmul 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, hydroxypropylcyclodextrin, 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 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.

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.

Parental injectable administration is generally used for subcutaneous, intramuscular or intravenous 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 relates to a pharmaceutical composition comprising a compound of the present disclosure and a pharmaceutically acceptable carrier. The pharmaceutically acceptable carrier can further include an excipient, diluent, or surfactant.

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.

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 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 amount in the list of doses. In one embodiment, the compositions are in the form of a tablet that can be scored.

Equivalents

While the present technology has been described in conjunction with the specific embodiments set forth above, many alternatives, modifications and other variations thereof will be apparent to those of ordinary skill in the art. All such alternatives, modifications and variations are intended to fall within the spirit and scope of the present disclosure. EXAMPLES

The disclosure will now be illustrated by way of the following non-limiting examples. While particular embodiments of the disclosure are described below, a skilled person will appreciate that various changes and modifications can be made. References to preparations carried out in a similar manner to, or by the general method of, other preparations, may encompass variations in routine parameters such as time, temperature, workup conditions, minor changes in reagents amounts, and the like.

Abbreviations

The following list provides definitions of certain abbreviations and symbols as used herein. It will be appreciated that the list is not exhaustive, but the meaning of those abbreviations and symbols not herein below defined will be readily apparent to those skilled in the art. In describing the disclosure, chemical elements are identified in accordance with the Periodic Table of the Elements.

ACN acetonitrile

AcOH acetic acid aq. aqueous

Ar argon

COMU l-cyano-2-ethoxy-2-oxoethylidenaminooxy)dimethylamino-morpho lino- carbenium hexafluorophosphate

CSA camphorsulphonic acid

DCC dicyclohexylcarbodiimide

DCM dichloromethane

DIEA N, AMiisopropylethylamine

DMF dimethylformamide

EDCI 1 -ethyl-3-(3-dimethylaminopropyl)carbodiimide eq. equivalent

EtOAc ethyl acetate

EtOH ethanol

Et20 diethylether h hour(s)

HPLC high performance liquid chromatography i-PrOH isopropanol

LC liquid chromatography

M molar

MS mass spectroscopy min minutes

NMR nuclear magnetic resonance spectroscopy rt room temperature

TR retention time sat. saturated

Characterization of the Compounds

Unless specified otherwise, the purity and identity of Intermediate or example compounds were assessed by state-of-the-art LC/MS. Methods for reaction monitoring and compound purity determination were performed by liquid chromatography/mass spectrometry (LC/MS), as described below. Method A was used to characterize the intermediates 1-1 to I- 6. Method B was used to characterize the inventive compounds and confirm their purity. Percent purity was determined by reversed phase HPLC or UPLC using UV detection (254 nm). Compound structures were confirmed by MS, using electro spray ionization positive (ESI+) method and reported as [M+H]+, referring to the protonated molecular ion. Method A

UPLC system: UPLC I BIN SOL MGR with ACQUITY UPLC I-Class eK PDA Detector; Column: Acquity BEH Cl 8 column (1.7pm particle size, dimensions 50mm x 2.1mm); Mobile phases: phase A (H2O/ammonium formate, pH 3.75 or 9.2) and phase B (CHsCN + 5% H2O/ammonium formate, pH 3.75 or 9.2) were used according to the following methods:

Mass Spectrometry Analysis: ACQUITY QDa (Performance) Xevo TQD. Ionization: electrospray (polarity: negative and positive).

Method B

HPLC system: Waters 2695 LC with photodiode array detector Waters 996; Column: XBridge Cl 8 column (3.5pm particle size, dimensions 50mm x 4.6mm); Mobile phases: phase A (H2O/ammonium formate, pH 9.2) and phase B (CHsCN + 5% H2O/ammonium formate, pH 9.2) were used according to the following methods:

Mass Spectrometry Analysis: Waters Alliance Micromass ZQ 2000. Ionization: electrospray (polarity: negative and positive).

NMR spectra were recorded on a Bruker DRX-300 spectrometer or Bruker 500 MHz spectrometer with a TXI probe. Chemical shifts were measured in parts per million (ppm). The assignments were made using one-dimensional (ID) 'H and ¹³ C spectra and two-dimensional (2D) HSQC, HMBC spectra.

All commercial reagents and solvents were used without further purification. Normal phase purifications were performed on Interchim PuriFlash 430 with prepacked columns (FlashPure, BUCHI®, silica 40pm irregular). Reversed phase purifications were performed by HPLCprep (Buchi Pure C-830, Column: OmniSphere C18 Dynamax, using as mobile phases H ₂ O (0.1%HCOOH)/ACN(0.1%HCOOH). Example 1: Synthesis of C21-C23 Acetal 25-OH Rifabutin (Intermediate 1-1)

The inventive compounds were prepared from the free 25-OH rifabutin (Intermediate I- 1) prepared from commercially available rifabutin as shown below.

Synthesis of Intermediate 1-1:

Rifabutin (40.0 g, 47.2 mmol) was dissolved in dry DMF (80 mL) at rt under nitrogen atmosphere. 2,2-Dimethoxy-propane (58.1 mL, 472 mmol) and camphorsulphonic acid (12.6 g, 54.3 mmol) were sequentially added to the solution. The reaction mixture was stirred at rt for 26h under nitrogen atmosphere. The mixture was then cooled at 0°C and poured into a mixture of sat. aq. solution of NaHCOs (700 mL) and water (500 mL). The reaction flask was washed with acetone (100 mL). The resulting suspension was stirred on an ice bath for 10 min and filtered. The cake was rinsed with sat. aq. solution of NaHCOs (100 mL) and water (50 mL) and dried under vacuum at 40°C for 24h. The crude product was purified by flash chromatography (DCM to 50% of the mixture DCM/MeOH/NHiOH 90/9/1.5 in DCM) to afford the desired product as a purple solid (37.68 g, 90% yield).

21,23-Dimethylacetonide-rifabutin (10.6 g, 11.9 mmol) was dissolved in dry diethyl ether (500 mL). The solution was cooled to -10°C with Ar bubbling. After 15 min, a solution of NaOMe (30 mL, 25w% in MeOH) was slowly added. Precipitation occurred and another portion of diethyl ether (100 mL) was added to homogenize. NaOMe solution was again added (27.4 mL). The solution was stirred at -5°C for 10 min before the ice bath was removed. The reaction mixture was stirred at rt for 6h. A saturated aqueous solution of NaHCOs (400 mL) was added and the layers were separated. The aqueous layer was extracted with diethyl ether (400 mL) and the combined organic layers were washed with brine (300 mL) and evaporated to afford the desired crude product as a black-purple powder. The product was purified by flash chromatography (DCM to 50% of the mixture DCM/MeOH/NHiOH 90/9/1.5 in DCM). After evaporation, the product was redissolved in acetone and slowly added into water under vigorous stirring. The solid was collected by filtration and dried at 40°C to yield the de-acetylated analog of rifabutin Intermediate 1-1 (97% purity).

Example 2: Synthesis of 25-Malonate Rifabutin (Intermediate 1-2)

Intermediate 1-1 (1 eq.) and malonic acid (3 eq.) were dissolved in THF and cooled to 0°C. DCC (3 eq.) was added and the reaction was stirred at 0°C for 1.5h. Dicyclohexylurea was removed by filtration and the filtrate was evaporated under vacuum. The crude product was purified by flash chromatography (CHCh/MeOH) to yield Intermediate 1-2 as a black solid.

Example 3: Synthesis of 25 -Methyl-mal onate Rifabutin (Intermediate 1-3) Intermediate 1-1 (500mg, 0.59mmol, leq.) and 2-methylpropanedioic acid (210mg,

1.78mmol, 3eq.) were dissolved in DCM (lOmL). Then DCC (366mg, 1.78mmol, 3eq.) was added and reaction stirred at rt. After Ih, the mixture was filtered, and DCM was evaporated. The obtained oil was solubilized in EtOAc (30mL) and washed with an aqueous solution of HC1 IN (30mL) and brine (30mL). The organic layer was dried over MgSCti and concentrated under vacuum. The obtained solid was purified by flash chromatography (CHCh/MeOH, from 100/0 to 95/5) to yield Intermediate 1-3 as a black solid, obtained as a mixture of diastereoisomers (m=395mg, yield=70%). LC/MS A (ESI+): TR = 2. 15 min, m/z [M+H] ⁺ = 945.52, UV purity: 99 % (254 nm).

'H NMR (300 MHz, CDCL): (mixture of diastereoisomers) 60.35 (d, J= 7.0 Hz, 1.5H), 0.41 (d, J= 7.0 Hz, 1.5H), 0.62-0.73 (m, 3H), 0.73-0.88 (m, 9H), 0.99-1.10 (m, 6H), 1.16-1.25 (m, 3H), 1.25-1.36 (m, 3H), 1.40-1.55 (m, 3H), 1.64-1.91 (m, 3H), 1.74 (s, 1.5 H), 1.75 (s, 1.5H), 1.99 (s, 3H), 2.05-2.16 (m, 1H), 2.16-2.26 (m, 1H), 2.30 (s, 1.5H), 2.31 (s, 1.5H), 2.68 (s, 1.5H), 2.73 (s, 1.5H), 2.77-3.00 (m, 4H), 3.01-3.66 (m, 8H), 4.90-5.08 (m, 2H), 5.72-5.86 (m, 1H), 6.02 (dd, J= 15.4, 6.8 Hz, 1H), 6.14 (d, J= 10.5 Hz, 1H), 6.19-6.34 (m, 1H), 7.66 (s, 0.5H), 7.67 (s, 0.5H), 8.70 (brs, 1H), 14.61 (s, 0.5H), 14.62 (s, 0.5H).

¹³ C NMR (75 MHz, CDCL): (mixture of diastereoisomers) 6 7.8, 8.2, 8.6, 9.8, 10.1,

12.8, 14.3, 14.4, 15.3, 17.7, 20.1, 20.2, 20.3, 20.7, 20.8, 23.8, 23.9, 24.5, 25.8, 33.0, 33.7, 34.3, 36.2, 39.9, 40.5, 41.5, 41.7, 44.7, 47.4, 47.6, 50.9, 51.1, 55.7, 55.9, 64.4, 64.7, 70.7, 70.8, 75.1, 75.5, 76.9, 77.3, 78.6, 78.8, 91.9, 100.0, 100.1, 104.9, 106.1, 108.5, 111.4, 111.5, 114.1, 114.2, 114.9, 115.1, 123.7, 124.9, 125.0, 130.4, 130.5, 133.3, 133.5, 140.6, 140.8, 140.9, 141.5, 141.6, 156.1, 156.2, 168.1, 168.7, 168.8, 171.0, 171.2, 172.3, 172.4, 174.55, 174.58, 177.1, 181.7,

181.8, 193.0, 193.1.

Example 4: Synthesis of 25-Succinate Rifabutin (Intermediate 1-4)

Intermediate 1-1 (1 g, 1.18 mmol, 1 eq.), succinic anhydride (591.5 mg, 5.92 mmol, 5 eq.) and DMAP (722.2 mg, 5.92 mmol, 5 eq.) were dissolved in 10 mL of CHCE and the reaction was stirred 60°C. After 70h, the mixture was diluted in 50 mL of DCM, washed with an aqueous solution of HC1 0.5N (2x30mL), with a saturated aqueous solution of NaHCOs (2x30mL) and with brine (30mL). The organic layer was dried with MgSCti and evaporated under vacuum. The obtained solid was purified by flash chromatography (DCM/MeOH from 100/0 to 90/10) to yield Intermediate 1-4 as a black solid (791 mg, 71% yield).

LC/MS A (ESI+): TR = 2.14 min, m/z [M+H] ⁺ = 945.60, UV purity: 99 % (254 nm).

'H NMR (300 MHz, CDCh): 8 0.29 (d, J= 7.0 Hz, 3H), 0.68 (d, J= 7.0 Hz, 3H), 0.79- 0.85 (m, 9H), 1.16-1.26 (m, 9H), 1.31-1.72 (m, 5H), 1.75 (s, 3H), 2.00 (s, 3H), 2.18-2.29 (m, 2H), 2.31 (s, 3H), 2.53-2.59 (m, 4H), 2.80 (s, 3H), 2.96-3.08 (m, 3H), 3.30-3.72 (m, 8H), 4.92 (d, J= 8.1 Hz, 1H), 5.04 (dd, J= 12.1, 6.2 Hz, 1H), 5.85 (d, J= 11.5 Hz, 1H), 5.99-6.35 (m, 3H), 7.62 (s, 1H), 8.72 (s, 1H), 14.62 (s, 1H). nC NMR(75 MHZ, CDCh): 87.79, 8.98, 9.84, 12.79, 17.68, 20.16, 20.24, 21.19, 21.23, 23.67, 24.47, 25.73, 29.09, 29.16, 32.49, 33.30, 34.26, 36.30, 40.70, 41.18, 51.72, 51.37, 56.26, 65.02, 70.98, 74.69, 76.93, 78.38, 91.42, 99.90, 104.79, 106.09, 108.44, 111.50, 114.25, 115.27, 123.84, 124.87, 130.51, 133.39, 140.53, 140.85, 141.68, 156.46, 168.13, 168.66, 171.46, 172.19, 176.15, 182.05, 193.17.

Example 5: Synthesis of 25 -Glutarate Rifabutin (1-5)

Intermediate 1-1 (1 g, 1.18 mmol, 1 eq.), glutaric anhydride (675 mg, 5.92 mmol, 5 eq.) and DMAP (723 mg, 5.92 mmol, 5 eq.) were dissolved in 10 mL of CHCh. The reaction was stirred at 60°C. After 22h, glutaric anhydride (675 mg, 5.92 mmol, 5 eq.) and DMAP (723 mg, 5.92 mmol, 5 eq.) were added and the mixture was stirred at 60 °C. After 24h, the mixture was diluted in 50 mL of DCM, washed with an aqueous solution of HC1 0.5N (2x3 OmL), with a saturated aqueous solution of NaHCOs (2x30mL) and with brine (30mL). The organic layer was dried with MgSCh and evaporated under vacuum. The obtained solid was purified by flash chromatography (DCM/MeOH from 100/0 to 90/10) to yield Intermediate 1-5 as a black solid (554 mg, 49% yield).

LC/MS A (ESI+): TR = 2.19min, m/z [M+H] ⁺ = 959.65, UV purity: 99 % (254 nm).

'H NMR (300 MHz, CDCh): 8 0.33 (d, J= 7.0 Hz, 3H), 0.68 (d, J= 7.0 Hz, 3H), 0.80- 0.86 (m, 9H), 1.14 (dd, J= 2.1, 6.5 Hz, 6H), 1.22 (s, 3H), 1.36-1.41 (m, 1H), 1.51 (m, 2H), 1.67-1.80(m, 5H), 1.85-1.91 (m, 2H), 2.02 (s, 3H), 2.15-2.40 (m, 9H), 2.80 (s, 3H), 2.92 (d, J = 6.6 Hz, 2H), 3.02-3.08 (m, 1H), 3.10-3.71 (m, 8H), 4.91 (d, J = 7.6 Hz, 1H), 5.04 (dd, J = 12.1, 6.4 Hz, 1H), 5.85 (d, J= 12.1 Hz, 1H), 6.05 (dd, J= 15.5, 6.1 Hz, 1H), 6.16 (dd, J= 10.7, 1.1 Hz, 1H), 6.29 (dd, J= 15.6, 10.6 Hz, 1H), 7.75 (s, 1H), 8.69 (s, 1H), 14.65 (s, 1H).

¹³ C NMR (75 MHz, CDCh): 8 7.92, 9.09, 10.08, 12.92, 17.86, 20.26, 20.34, 21.29, 21.33; 23.75, 25.87, 32.95, 33.53, 33.64, 33.77, 34.35, 36.52, 40.78, 41.43, 51.39, 51.64, 56.31, 65.19, 71.12, 74.54, 77.05, 78.66, 91.99, 100.05, 104.96, 106.19, 108.58, 111.62, 114.30, 115.26, 123.93, 125.06, 130.77, 133.33, 140.74, 140.94, 141.79, 156.38, 168.25, 168.78, 172.31, 172.39, 177.06, 182.04.

Example 6: Synthesis of 25-Ethyl-malonate Rifabutin (1-6)

Intermediate 1-1 (1.00g, 1.18mmol, 1 eq.) in 20 mL of dry DCM was added to ethylmalonic acid (469 mg, 3.55 mmol, 3.0 eq.) and DCC (732 mg, 3.55 mmol, 3.0 eq.). The mixture was stirred 2 h 30 min at 40 °C then was cooled down to 0 °C. The precipitated DCU was filtered off and rinsed with DCM. The filtrate was concentrated in vacuo to give a crude residue which was purified by flash chromatography (solid deposited in DCM, 80 g Buchi, DCM/MeOH gradient from 1/0 to 96/4, 40 min). Intermediate 1-6 was obtained as a violet solid as a mixture of diastereoisomers (104 mg, 9 %).

MS A (ESI+): m/z [M+H] ⁺ = 957.70, UV purity: 99 % (254 nm).

Example 7: General procedure for the Synthesis of Ester Conjugates

A solution of the desired Intermediate (1-2, 1-3, 1-4, 1-5 or 1-6) in THF (0.07M) was prepared. The corresponding alcohols (0.064mmol, 3eq) and EDCI (12.5mg, 0.64mmol, 3eq) were packed in Kimble reactor, and 300pL of the solution of the rifabutin Intermediate in THF (corresponding leq of the rifabutin-intermediate) was added. The reaction was stirred at rt. After 24h, 600pL of a solution of camphorsulphonic in water (0.5N) was added to the mixtures. The reaction tubes were stirred at 4°C for 16h. The mixtures were then deposited on Column PoraPak (Rxn RP 6CC) equilibrated with water. The elution was processed by 5mL of water, 5mL of a solution of water/ ACN (90/10) and lOmL of ACN. The lOmL ACN fractions were collected, frozen and freeze-dried to give the desired products as purple powders.

Example 8: General procedure for the Synthesis of Amide Conjugates

A solution of the desired Intermediate (1-2, 1-3, 1-4, 1-5 or 1-6) in THF (0.07M) was prepared. The corresponding amines (0.043mmol, 2eq) and COMU (18mg, 0.43mmol, 2eq) were packed in Kimble reactor, and 300pL of the solution of the rifabutin Intermediate in THF

(corresponding to leq of the rifabutin Intermediate) followed by DIEA ( 15pL. 0.082mmol, 4eq) were added. The reaction was stirred at rt. After 3h, 600pL of a solution of camphorsulphonic in water (0.5N) was added to the mixtures. The reaction was stirred at 4°C for 16h. The mixture was then deposited on Column PoraPak (Rxn RP 6CC) equilibrated with water. The elution was processed by 5mL of water, 5mL of a sat. aq. solution of NaHCOs, 5mL of a solution of a solution of water/ ACN (90/10), 5mL of water and lOmL of ACN. The lOmL ACN fractions were collected, frozen and freeze-dried to give the desired products as purple powders.

Table 3 below summarizes exemplary compounds of the invention that were prepared according to the protocols of Examples 7 and 8 above. Data given in Table 3 were obtained following the analytic method B.

Table 3: Compounds (Cpd) of the Disclosure from Intermediate 1-2, 1-3, 1-4, 1-5, or 1-6.

To a solution of 1-2 (200mg, 0.21mmol, leq) in THF (5mL) was added (l-methyl-3- piperidyl)methanol (55pL, 0.43mmol, 2eq), and EDCI (113mg, 0.64mmol, 3eq). The reaction mixture was stirred at rt for 18h, filtered, and the solvent was evaporated. The obtained solid was re-dissolved in DCM (40mL) and washed with a sat. aq. solution of NaHCOs (3x40mL), brine (40mL) and dried over MgSCti. The organic phase was then evaporated under vacuum. The obtained solid was purified by flash chromatography (DCM/MeOH from 100/0 to 90/10) to give a black solid (yield: 71.5%, Rt: 2.77min, purity (254nm): 99%, MS (ESI+) m/z = 1042.69 [M+H] ⁺ , 521.96 [M+2H]2+). The C21-C23 -protected Compound 3 (160mg, 0.15mmol) was dissolved in 5mL of a solution of THF/0.5 N acid camphorsulfonic in water (1/1). The reaction was stirred at rt for 4h and 40mL of DCM was subsequently added. The mixture was washed with a sat. aq. solution of NaHCOs (3x40mL) and brine (40mL). The organic layer was dried over MgSCti and evaporated under vacuum. The obtained solid was purified by flash chromatography (DCM/MeOH: from 100/0 to 90/10) to give compound 3 as a black solid (yield: 52%, Rt: 2.43 min, purity (254nm)=99%, MS (ESI+) m/z = 1002.71 [M+H] ⁺ , 501.95 [M+2H] ²⁺ ).

Compound 3 was further synthesized as follows: To a solution of 1-2 (150mg, 0.16mmol, leq.) in THF (5mL) was added (l-methyl-3-piperidyl)methanol (0.32mmol, 2eq.), DIEA (HOpL, 0.64mmol, 4eq) and COMU (137mg, 0.32mmol, 2eq). The reaction was stirred at rt. After 3h, the solvent was evaporated under vacuum. The obtained solid was dissolved in DCM (40mL) and washed with an aqueous solution of HC10.5N (3x40mL), a saturated aqueous solution of NaHCOs (3x40mL), brine (40mL), and dried over MgSCU The DCM was evaporated under vacuum. The obtained solid was then dissolved in 5mL of a solution of THF/camphorsulphonic acid in water 0.5 N (1/1). The reaction mixture was stirred at rt. After 24h, the mixture was diluted in 50mL of DCM and washed with a sat. aq. solution of NaHCOs (3x50mL), brine (50mL) and dried over MgSOv The solvent was evaporated under vacuum and the resulting solid was purified by preparative HPLC to afford Compound 3 as a purple solid (yield = 23 %). LC/MS A (ESI+): TR = 1.73 min, m/z [M+H] ⁺ = 1002.56, UV purity: 99 % (254 nm). HRMS (Maldi-TOF): m/z calculated for [M+H] ⁺ = 1002.5434, found 1002.5461.

^J H NMR (300 MHz, CDCE): (mixture of diastereoisomers) 6 -0.12 (d, J= 7.0 Hz, 3H), 0.58 (d, J= 6.7 Hz, 3H), 0.81 (d, J= 6.8 Hz, 3H), 0.92 (d, J= 6.5 Hz, 6H), 1.02 (d, J= 6.8 Hz, 3H), 1.33-1.45 (m, 1H), 1.60-2.22 (m, 14H), 1.71 (s, 3H), 2.02 (s, 3H), 2.24-2.45 (m, 3H), 2.28 (s, 3H), 2.41 (d, J= 12.1 Hz, 3H), 2.55-2.79 (m, 2H), 2.90-3.08 (m, 4H), 3.05 (s, 3H), 3.11 (d, J= 10.1 Hz, 1H), 3.20-3.34 (m, 3H), 3.37-3.60 (m, 2H), 3.66 (dd, J= 9.8 Hz, 2.8 Hz, 1H), 3.89- 4.09 (m, 2H), 4.86 (dd, J= 9.83 Hz, 1H), 5.12-5.24 (m, 1H), 5.96 (dd, J= 15.5 Hz, 6.3 Hz, 1H), 6.10-6.41 (m, 3H), 8.22 (s, 0.5H) , 8.23 (m, 0.5H), 9.16 (s, 1H), 14.67 (s, 1H).

¹³ C NMR (75 MHz, CDCh): (mixture of diastereoisomers) 6 7.87, 7.91, 8.98, 11.28,

11.38, 11.42, 17.53, 17.58, 20.45, 20.46, 21.07, 21.08, 22.22, 22.27, 23.78, 23.96, 25.96, 26.13,

33.17, 35.17, 35.38, 36.28, 37.73, 38.02, 38.61, 41.70, 41.79, 45.49, 45.72, 51.56, 51.62, 55.27,

55.42, 56.88, 56.93, 57.80, 58.00, 66.35, 67.38, 67.69, 72.58, 72.58, 72.65, 74.30, 74.38, 76.55,

76.69, 81.23, 81.43, 94.67, 94.71, 104.77, 107.60, 107.63, 109.20, 109.22, 111.90, 114.54, 114.60, 116.07, 116.22, 124.14, 124.17, 125.28, 131.62, 131.69, 133.23, 133.34, 141.04, 141.09, 142.12, 142.21, 144.81, 144.95, 155.39, 166.77, 166.78, 167.20, 167.33, 168.36,

168.38, 168.64, 168.95, 171.65, 181.14, 181.21, 192.68.

Example 10: Synthesis of Compound 5

To a solution of 1-2 (150mg, 0.16mmol, leq) in THF (5mL) was added (l-methyl-4- piperidyl)methanamine (27 pL, 0.19mmol, 1.2eq), DIEA (HOpL, 0.64mmol, 4eq) and COMU (137mg, 0.32mmol, 2eq). After Ih, the solvent was evaporated under vacuum. The obtained solid was dissolved in DCM (40mL) and washed with a sat. aq. solution of NaHCOs (3x40mL), brine (40mL), and dried over MgSCri. The solvent was then evaporated under vacuum to give a black solid (quantitative yield) which was used without further purification (Rt: 2.65min, MS(ESI+) m/z = 1041.70 [M+H] ⁺ ). The obtained C21-C23-protected Compound 5 (160mg, 0.15mmol) was dissolved in a solution of THF/0.5 N camphorsulphonic in water (1/1). The reaction mixture was stirred at rt for 3h and 40mL of DCM was added. The mixture was washed with a sat. aq. solution of NaHCOs (3x40mL), brine (40mL) and dried over MgSCri. The solvent was evaporated under vacuum and the resulting solid was purified by flash chromatography (DCM/MeOH from 100/0 to 90/10) to give compound 5 as a black solid (yield: 51%, Rt: 2.28min, purity (254nm): 99%, MS(ESI+) m/z = 1001.7 [M+H] ⁺ , 501.4 [M+2H] ²⁺ ).

Compound 5 was further synthesized as follows: To a solution of 1-2 (150mg, 0.16mmol, leq) in THF (5mL) was added (l-methyl-4-piperidyl)methanamine (27 pL, 0.19mmol, 1.2eq), DIEA (HOpL, 0.64mmol, 4eq) and COMU (137mg, 0.32mmol, 2eq). After Ih, the solvent was evaporated under vacuum. The obtained solid was dissolved in DCM (40mL) and washed with a sat. aq. solution of NaHCOs (3x40mL), brine (40mL), and dried over MgSCh. The solvent was then evaporated under vacuum to give a black solid (quantitative yield) which was used without further purification (Rt: 2.65min, MS(ESI+) m/z = 1041.70 [M+H] ⁺ ).

The obtained C21-C23 -protected Compound 5 (160mg, 0.15mmol) was dissolved in a solution of THF/0.5 N camphorsulphonic in water (1/1). The reaction mixture was stirred at rt for 3h and 40mL of DCM was added. The mixture was washed with a sat. aq. solution of NaHCOs (3x40mL), brine (40mL) and dried over MgSCri. The solvent was evaporated under vacuum and the resulting solid was purified by flash chromatography (DCM/MeOH from 100/0 to 90/10) to give compound 5 as a black solid (yield: 51%, Rt: 2.28min, purity (254nm): 99%, MS(ESI+) m/z = 1001.7 [M+H] ⁺ , 501.4 [M+2H] ²⁺ ).

Example 11: Synthesis of Compound 14

To a solution of 1-2 (150mg, 0.16mmol, leq.) in THF (5mL) was added methyl-phenyl- piperidin-4-yl-amine (0.32mmol, 2eq.), DIEA (HOpL, 0.64mmol, 4eq) and COMU (137mg, 0.32mmol, 2eq). The reaction was stirred at rt. After 3h, the solvent was evaporated under vacuum. The obtained solid was dissolved in DCM (40mL) and washed with an aqueous solution of HC1 0.5N (3x40mL), a saturated aqueous solution of NaHCOs (3x40mL), brine (40mL), and dried over MgSCU The DCM was evaporated under vacuum. The obtained solid was then dissolved in 5mL of a solution of THF/Camphorsulphonic acid in water 0.5 N (1/1). The reaction mixture was stirred at rt. After 24h, the mixture was diluted in 50mL of DCM and washed with a sat. aq. solution of NaHCOs (3x50mL), brine (50mL) and dried over MgSCU The solvent was evaporated under vacuum and the resulting solid was purified by preparative HPLC to afford Compound 14 as a purple solid (yield = 64 %). LC/MS A (ESI+): TR = 2.33 min, m/z [M+H] ⁺ = 1063.61, UV purity: 99 % (254 nm).

^X H NMR (300 MHz, CDCh): 8 -0.06 (d, J = 7.1 Hz, 1.2H), -0.05 (d, J = 7.1 Hz, 1.8H), 0.83 (d, J = 6.8 Hz, 3H), 0.61 (d, J = 6.9 Hz, 3H), 0,96 (d, J = 6.6 Hz, 6H), 1.03 (d, J = 6.8 Hz, 1.2H), 1.04 (d, J = 6.9 Hz, 1.8H), 1.49-1.38 (m, 1H), 1.70-1.53 (m, 2H), 1.72 (s, 1.8H), 1.74 (s, 1.2H), 1.99-1.76 (m, 7H), 2.04 (s, 3H), 2.10-2.03 (m, 3H), 2.32 (s, 1.2H), 2.33 (s, 1.8H), 2.42- 2.33 (m, 3H), 2.66-2.54 (m, 1H), 2.74 (s, 1.2H), 2.79-2.68 (m, 2H), ), 2.81 (s, 1.8H), 3.05-2.95 (m, 2H), 3.07 (s, 1.8H), 3.09 (s, 1.2H), 3.27-3.10 (m, 3H), 3.36-3.28 (m, 1H), 3.48-3.38 (m, 3H), 3.66 (d, J = 9.9 Hz, 1H), 3.88-3.74 (m, 2H), 4.73 (d, J = 13.0 Hz, 1H), 4.82 (t, J = 12.3 Hz, 1H), 5.18 (dd, J = 12.7 Hz, 7.7 Hz, 0.4H), 5.23 (dd, J = 12.6 Hz, 8.0 Hz,0.6H), 5.23 (dd, J = 12.6 Hz, 8.0 Hz,0.6H), 5.95 (t, J = 6.2 Hz, 0.4H), 5.95 (t, J = 6.2 Hz, 0.4H), 6.00 (t, J = 6.3 Hz, 0.6H), 6.17 (d, J = 12.5 Hz, 0.4H), 6.19 (d, J = 12.6 Hz), 6.25 (d, J = 10.5 Hz, 1H), 6.37 (dd, J = 15.2 Hz, 10.0 Hz, 1H), 6.75 (td, J = 7.3 Hz, 0.9 Hz, 1H), 6.86-6.78 (m, 2H), 7.24 (t, J = 7.8 Hz, 2H), 8.24 (s, 0.4H), 8.25 (s, 0.6H), 9.11 (brs, 0.4H), 9.20 (brs, 0.6H), 14.69 (s, 1H). 5 13C NMR (75 MHz, CDCl3): δ 7.6, 8.9, 11.19, 11.22, 11.3, 11.5, 17.4, 17.5, 20.32, 20.34, 20.98, 20.99, 22.1, 22.2, 25.8, 28.7, 29.45, 29.48, 31.6, 31.7, 32.9, 33.0, 35.2, 36.1, 37.4, 37.7, 37.8, 38.4, 38.5, 41.4, 41.9, 42.0, 46.4, 51.5, 56.7, 56.8, 56.9, 57.0, 66.3, 72.4, 72.6, 74.1, 74.2, 76.6, 81.1, 81.8, 94.4, 104.7, 104.8, 107.5, 107.6, 109.0, 109.1, 111.8, 114.0, 114.1, 114.5, 114.6, 115.4, 115.6, 117.5, 117.7, 124.1, 125.0, 125.08, 125.1, 129.3, 131.40, 131.43, 133.1, 10 133.2, 140.9, , 141.9, 142.0, 144.7, 145.3, 149.8, 149.9, 155.3, 164.2, 164.3, 168.3, 168.37, 168.43, 168.5, 171.4, 171.5, 181.0, 181.2, 192.5, 192.6. Example 12: Synthesis of Compound 40 N N O Following the above p p , e title compound was obtained as 15 a purple solid (yield = 33 %). LC/MS A (ESI+): T = 2.37 + R min, m/z [M+H] = 1077.65, UV purity: 92 % (254 nm). HRMS (Maldi-TOF): m/z calculated for [M+H]+ = 1077.5907, found 1077.5912. 1H NMR (300 MHz, CDCl ₃ ): (mixture of diastereoisomers and rotamers) δ -0.12-0.00 (m, 3H), 0.51-0.67 (m, 3H), 0.76-0.86 (m, 3H), 0.92-1.06 (m, 9H), 1.26-1.51 (m, 4H), 1.45- 20 2.10 (m, 16H), 2.11-2.45 (m, 6H), 2.46-2.64 (m, 3H), 2.65-3.50 (m, 13H), 3.55-3.71 (m, 2H), 3.56-3.87 (m, 1H), 3.89-4.06 (m, 1H), 4.64-4.88 (m, 2H), 5.08-5.27 (m, 1H), 5.88-6.06 (m, 1H), 607-6.47 (m, 3H), 6.69-6.88 (m, 3H), 7.16-7.30 (m, 2H), 8.16-8.27 (m, 1H), 8.75-9.29 (m, 1H), 14.54-14.75 (m, 1H). 13C NMR (75 MHz, CDCl ₃ ): (mixture of diastereoisomers and rotamers) δ 7.68, 8.81, 25 8.88, 8.97, 10.51, 11.02, 11.23, 11.26, 11.31, 11.67, 13.87, 14.02, 14.05, 14.16, 17.18, 17.27, P6306PC00 – 169 – 17.42, 20.21, 20.32, 20.82, 20.84, 21.74, 22.02, 22.08, 22.22, 25.34, 25.39, 28.65, 28.79, 28.84, 29.54, 29.60, 29.65, 31.59, 32.82, 32.94, 33.02, 34.53, 35.41, 37.15, 37.71, 37.81, 37.91, 38.08, 38.33, 38.39, 38.51, 42.12, 42.18, 42.25, 42.79, 43.07, 43.44, 43.54, 45.73, 46.05, 46.08, 46.17, 51.11, 56.46, 56.60, 56.70, 56.86, 56.91, 56.96, 57.02, 65.48, 65.54, 72.11, 72.52, 72.60, 72.74, 5 73.52, 73.64, 73.68, 74.12, 76.53, 76.75, 79.78, 80.98, 81.34, 81.99, 93.38, 93.53, 104.74, 104.90, 104.94, 107.23, 107.41, 107.46, 107.66, 108.78, 108.82, 108.99, 111.64, 111.78, 113.83, 114.09, 114.15, 114.37, 114.63, 114.66, 114.89, 115.02, 115.19, 115.40, 117.26, 117.65, 123.94, 124.19, 124.79, 124.87, 125.03, 129.24, 130.88, 130.99, 131.29, 133.21, 133.27, 140.79, 140.90, 140.96, 141.50, 141.68, 141.74, 141.91, 143.76, 144.47, 144.76, 10 145.47, 149.75, 149.91, 155.48, 155.60, 155.64, 167.71, 167.79, 167.85, 168.12, 168.26, 168.41, 168.47, 168.65, 170.97, 171.08, 171.36, 171.41, 171.48, 181.01, 181.38, 181.43, 192.48, 192.58, 192.62, 192.69. Example 13: Synthesis of Compound 50 N O 15 Following the above p p , e title compound was obtained as a purple solid (yield = 15 %). LC/MS A (ESI+): TR = 2.38 min, m/z [M+H]+ = 1048.67, UV purity: 99 % (254 nm). HRMS (Maldi-TOF): m/z calculated for [M+H] ⁺ = 1048.5647, found 1048.5693. 1H NMR (300 MHz, CDCl3): (mixture of rotamers) δ -0.06 (dd, J = 6.2 Hz, 62 Hz, 3H), 0.59 20 (d, J = 6.7 Hz, 3H), 0.82 (d, J = 6.8 Hz, 3H), 0.91-1.03 (m, 9H), 1.11-1.25 (m, 2H), 1.36-1.51 (m, 1H), 1.64-2.07 (m, 10H), 1.73 (s, 3H), 2.03 (s, 3H), 2.26-2.40 (m, 6H), 2.51-2.58 (m, 2H), 2.61-3.10 (m, 6H), 3.06 (s, 3H), 3.13-3.24 (m, 1H), 3.30-3.39 (m, 3H), 3.45-3.74 (m, 4H), 4.46- 4.60 (m, 1H), 4.81 (dd, J = 10.4 Hz, 10.4 Hz, 1H), 5.07-5.20 (m, 1H), 5.95 (dd, J = 6.6 Hz, 6.6 Hz, 0.5H), 6.00 (dd, J = 6.6 Hz, 6.6 Hz, 0.5H), 6.09-6.29 (m, 2H), 6.34 (dd, J = 15.4 Hz, 10.4Hz, 25 1H), 7.10-7.30 (m, 5H), 8.22 (s, 0.5H), 8.24 (s, 0.5H), 9.06 (s, 1H), 14.72 (s, 0.5H), 14.73 (s, 0.5H). P6306PC00 – 170 – 13C NMR (75 MHz, CDCl3): (mixture of rotamers) δ 7.66, 7.71, 8.79, 10.83, 11.09, 11.17, 11.19, 17.31, 17.38, 20.28, 20.80, 21.90, 22.06, 25.69, 31.61, 32.26, 32.34, 32.91, 32.96, 35.16, 36.03, 37.47, 37.58, 37.64, 38.00, 38.17, 38.20, 38.28, 41.21, 42.24, 42.31, 42.84, 42.91, 46.66, 46.69, 51.41, 51.47, 56.70, 56.82, 66.17, 72.57, 72.66, 74.07, 74.15, 76.57, 80.50, 81.00, 94.26, 5 94.30, 104.69, 107.29, 107.43, 108.89, 111.74, 111.77, 114.32, 114.36, 115.19, 115.54, 124.12, 124.16, 125.00, 125.06, 126.10, 128.33, 129.09, 131.04, 131.08, 133.11, 139.75, 139.88, 140.87, 140.93, 141.86, 141.98, 144.20, 144.71, 155.29, 164.04, 164.09, 168.23, 168.26, 168.30, 168.38, 168.58, 168.63, 171.34, 171.42, 181.10, 181.15, 192.50, 192.56. Example 14: Synthesis of Compound 57 O N O 10 Following the above p , he title compound was obtained as a purple solid (yield = 42 %). LC/MS A (ESI+): T _R = 2.27 min, m/z [M+H] ⁺ = 1050.56, UV purity: 99 % (254 nm). HRMS (Maldi-TOF): m/z calculated for [M+H]+ = 1050.5434, found 1050.5505. 15 ¹ H NMR (300 MHz, CDCl ₃ ): (mixture of rotamers) δ -0.05 (dd, J = 1.6 Hz, J = 7.0 Hz, 3H), 0.60 (d, J = 6.4 Hz, 3H), 0.82 (d, J = 7.0 Hz, 3H), 0.95 (d, J = 6.5Hz, 6H), 1.0 (d, J = 6.6 Hz, 3H), 1.36-1.50 (m, 1H), 1.66-2.18 (m, 11H), 1.69 (s, 1.5H), 1.73 (s, 1.5H), 2.03 (s, 3H), 2.28-2.43 (m, 3H), 2.30 (s, 1.5H), 2.31 (s, 1.5H), 2.73-2.90 (m, 2H), 2.98-3.11 (m, 2H), 3.07 (s, 1.5H), 3.08 (s, 1.5H), 3.18 (t, J = 9 Hz, 1H), 3.27-3.41 (m, 4H), 3.48-3.88 (m, 6H), 4.50- 20 4.62 (m, 1H), 4.80 (dd, J = 9.6, 5.7 Hz, 1H), 5.14 (quad d, J = 4.5 Hz, 12.5 Hz, 1H), 5.96 (ddd, J = 2.6 Hz, 6.6 Hz, 15.6 Hz, 1H), 6.17 (dd, J = 3.8 Hz, 12.5 Hz, 1H), 6.24 (d, J= 9.9 Hz, 1H), 6.36 (dd, J = 15.6 Hz, 10.4 Hz, 1H), 6.86-6.99 (m, 3H), 7.23-7.32 (m, 2H), 8.20 (s, 0.5H), 8.21 (s, 0.5H), 9.05 (s, 0.5H), 9.07 (s, 0.5H), 14.68 (s, 0.5H), 14.69 (s, 0.5H). 1 ³ C NMR (75 MHz, CDCl ₃ ): (mixture of rotamers) δ 7.67, 8.81, 11.06, 11.17, 11.20, 25 17.29, 17.32, 20.26, 20.82, 20.83, 21.95, 22.10, 25.56, 29.68, 29.85, 29.99, 30.75, 30.81, 32.90, 32.94, 34.92, 35.79, 37.40, 37.50, 37.66, 38.31, 38.36, 38.52, 41.21, 41.24, 42.84, 43.06, 51.26, P6306PC00 – 171 – 51.30, 56.70, 56.72, 65.88, 70.79, 71.03, 72.50, 72.54, 74.11, 74.17, 76.56, 80.95, 81.21, 93.98, 104.73, 107.39, 107.46, 108.92, 111.70, 111.72, 114.44, 114.50, 115.04, 115.13, 116.05, 116.07, 121.23, 124.11, 124.94, 129.65, 131.11, 133.12, 140.88, 141.76, 141.81, 144.68, 144.88, 155.37, 156.94, 156.96, 164.19, 164.25, 168.10, 168.22, 168.29, 168.32, 168.49, 5 171.30, 171.36, 181.11, 181.15, 192.48, 192.56. Example 15: Synthesis of Compound 66 F N N O Following the above p , e title compound was obtained as a purple solid (yield = 38 %). LC/MS A (ESI+): T + R = 2.23 min, m/z [M+H] = 1067.61, UV 10 purity: 97 % (254 nm). HRMS (Maldi-TOF): m/z calculated for [M+H] ⁺ = 1067.5500, found 1067.5509. 1H NMR (300 MHz, CDCl3): (mixture of rotamers) δ -0.08 (d, J = 7.7 Hz, 3H), 0.56 (d, J = 5.0 Hz, 3H), 0.82 (d, J = 6.8 Hz, 3H), 0.97 (d, J = 6.5 Hz, 6H), 1.01 (d, J = 6.9 Hz, 3H), 1.35-1.47 (m, 1H), 1.66-2.06 (m, 7H), 1.73 (s, 3H), 2.03 (s, 3H), 2.12-2.32 (m, 2H), 2.29 (s, 15 3H), 2.32-2.42 (m, 1H), 2.46 (d, J = 6.7 Hz, 2H), 2.81-3.81 (m, 19H), 3.06 (s, 1.5H), 3.07 (s, 1.5H), 4.77-4.84 (m, 1H), 5.12-5.20 (m, 1H), 5.96 (dd, J = 6.5, 15.4 Hz, 1H), 6.16 (dd, J = 4.5, 12.6 Hz, 1H), 6.24 (d, J =10.4 Hz, 1H), 6.36 (ddd, J = 4.3, 10.7, 15.2 Hz, 1H), 6.57-6.65 (m, 2H), 6.87-6.95 (m, 2H), 8.25 (s, 1H), 8.98 (s, 1H), 14.65 (s, 0.5H), 14.67 (s, 0.5H). 13C NMR (75 MHz, CDCl3): (mixture of rotamers) δ 7.73,8.86,10.99, 11.09, 11.21, 20 17.40, 20.37, 20.91, 22.03, 22.06, 24.37, 25.51, 26.27, 32.99, 34.73, 35.61, 37.37, 37.65, 37.72, 38.37, 38.46, 40.68, 41.27, 45.24, 46.03, 47.61, 47.87, 47.94, 49.07, 50.10, 51.01, 51.23, 51.26, 56.81, 56.84, 65.72, 72.56, 72.64, 74.10, 74.17, 76.57, 80.84, 81.06, 93.78, 104.84, 104.89, 107.44, 107.47, 108.94, 109.00, 111.77, 111.82, 112.73, 112.82, 112.91, 114.59, 114.62, 115.41, 115.93, 116.01, 116.22, 116.30, 124.13, 124.22, 125.02, 131.11, 131.26, 133.20, 25 133.26, 140.94, 140.96, 141.93, 143.54, 143.57, 143.80, 143.82, 144.47, 144.64, 153.73, 153.77, 155.55, 155.58, 156.85, 156.89, 165.59, 165.89, 168.27, 168.32, 168.40, 171.46, P6306PC00 – 172 – 171.48, 181.31, 181.37, 192.70, 192.72. Example 16: Synthesis of Compound 82 Following the above proc p , the title compound was obtained as 5 a purple solid (yield = 42 %). LC/MS A (ESI+): T + R = 2.29 min, m/z [M+H] = 1077.54, UV purity : 99 % (254 nm). HRMS (Maldi-TOF): m/z calculated for [M+H]+ = 1077.5907, found 1077.5912. 1H NMR (300 MHz, CDCl3): (mixture of rotamers) δ -0.04 (d, J = 7.0 Hz, 1.5H), -0.03 (d, J = 7.0 Hz, 1.5H), 0.62 (d, J = 6.8 Hz, 3H), 0.82 (d, J = 6.9 Hz, 3H), 0.92 (d, J = 6.5 Hz, 10 6H), 1.02 (d, J = 6.9 Hz, 3H), 1.38-1.47 (m, 1H), 1.60-1.84 (m, 7H), 1.73 (s, 3H), 1.90-2.22 (m, 4H), 2.03 (s, 3H), 2.26-2.76 (m, 10H), 2.28 (s, 3H), 2.73 (d, J = 13.8 Hz, 3H), 2.86-3.00 (m, 2H), 3.01-3.17 (m, 1H), 3.05 (s, 3H), 3.17-3.30 (m, 1H), 3.35 (dd, J = 2.1 Hz, 7.1 Hz, 1H), 3.57-3.84 (m, 4H), 3.95 (d, J = 13.3 Hz, 1H), 4.27 (d, J = 13.3 Hz, 1H), 4.76 (dd, J = 8.7 Hz, 9.1 Hz, 1H), 5.16 (dd, J = 12.6 Hz, 7.2 Hz, 1H), 5.97 (dd, J = 15.5 Hz, 6.8 Hz, 1H), 6.15, (d, J 15 = 12.5 Hz, 1H), 6.23 (d, J = 10.1 Hz, 0.8 Hz, 1H), 6.36 (dd, J = 15.6 Hz, 10.2 Hz, 1H), 6.73 (t, J = 7.2 Hz, 1H), 6.80 (d, J = 8.2 Hz, 2H), 7.17-7.26 (m, 2H), 8.23 (s, 1H), 8.97 (s, 1H), 14.79 (s, 1H). 13C NMR (75 MHz, CDCl3): (mixture of rotamers) δ 7.87, 7.99, 9.11, 11.09, 11.16, 11.34, 17.61, 20.62, 21.10, 22.24, 26.08, 28.12, 28.25, 29.05, 29.58, 29.67, 31.76, 31.80, 33.20, 20 33.24, 35.65, 36.52, 37.74, 37.77, 37.85, 38.51, 42.02, 42.18, 45.28, 45.42, 51.62, 51.72, 57.05, 57.21, 66.54, 73.18, 73.41, 73.46, 76.83, 80.76, 80.91, 94.86, 104.95, 107.54, 107.56, 109.12, 112.11, 114.15, 114.26, 114.40, 115.48, 115.63, 117.63, 117.78, 124.43, 125.39, 129.49, P6306PC00 – 173 – 131.24, 133.22, 141.32, 142.35, 144.26, 144.40, 150.03, 150.08, 155.47, 168.53, 168.58, 169.78, 169.90, 171.55, 171.60, 174.28, 174.43, 181.48, 192.76. Example 17: Synthesis of Compound 85 5 Following the above pro p , the title compound was obtained as a purple solid (yield = 35 %). LC/MS A (ESI+): TR = 2.29 min, m/z [M+H] ⁺ = 1091.57, UV purity : 99 % (254 nm). HRMS (Maldi-TOF): m/z calculated for [M+H]+ = 1091.6063, found 1091.6069. 1H NMR (300 MHz, CDCl3): (mixture of rotamers) δ -0.05 (d, J = 7.0 Hz, 3H), 0.62 10 (d, J = 6.8 Hz, 3H), 0.86 (d, J = 6.8 Hz, 3H), 0.96 (d, J = 6.5 Hz, 6H), 1.05 (d, J = 7.0 Hz, 3H), 1.37-1.51 (m, 1H), 1.62-2.08 (m, 13H), 1.74 (s, 1.5H), 1.75 (s, 1.5H), 2.07 (s, 3H), 2.29-2.46 (m, 7H), 2.34 (s, 3H), 2.56-2.71 (m, 3H), 2.77 (s, 3H), 2.94-3.17 (m, 4H), 3.08 (s, 1.5H), 3.08 (s, 1.5H), 3.32 (dd, J = 7.4 Hz, 2.2 Hz, 1H), 3.45 (s, 1H), 3.64-3.74 (m, 2H), 3.75-3.88 (m, 1H), 3.94-4.08 (m, 1H), 4.68-4.84 (m, 2H), 5.17 (dd, J = 7.6 Hz, 4.7 Hz, 0.5H), 5.21 (dd, J = 7.6 Hz, 15 4.7 Hz, 0.5H), 6.02 (dd, J = 15.3 Hz, 6.0 Hz, 1H), 6.19 (d, J = 12.3 Hz, 1H), 6.23-6.45 (m, 2H), 6.76 (t, J = 7.1 Hz, 1H), 6.84 (d, J = 8.25 Hz, 2H), 7.22-7.31 (m, 2H), 8.22 (s, 1H), 9.17 (s, 1H), 14.75 (s, 1H). 13C NMR (75 MHz, CDCl3): (mixture of rotamers) δ 7.86, 9.04, 11.26, 11.35, 11.50, 17.62, 20.47, 20.64, 21.08, 22.17, 26.07, 29.07, 29.83, 31.78, 32.51, 32.63, 33.24, 33.69, 35.58, 20 36.48, 37.70, 37.75, 37.91, 38.50, 38.55, 41.86, 45.61, 51.61, 51.70, 56.98, 57.24, 66.52, 72.84, 73.09, 73.16, 77.10, 81.16, 81.36, 94.94, 104.76, 107.56, 109.19, 111.92, 114.19, 114.50, 116.00, 117.66, 124.21, 125.33, 131.58, 131.62, 133.20, 141.14, 142.24, 144.59, 144.71, 150.07, 155.32, 168.35, 168.64, 170.76, 170.81, 171.65, 174.31, 174.37, 181.18, 192.63. P6306PC00 – 174 – Example 18: Synthesis of Compound 90 Following the abov , tle compound was obtained as a purple solid (yield = 47 %). LC/MS A (ESI+): T _R = 1.76 min, m/z [M+H]+ = 1063.51, UV 5 purity : 99 % (254 nm). 1H NMR (300 MHz, CDCl3): (mixture of rotamers) δ -0.10 (d, J = 6.9 Hz, 3H), 0.59 (d, J = 6.6 Hz, 3H), 0.81 (d, J = 6.7 Hz, 3H), 0.93 (d, J = 6.4 Hz, 6H), 1.03 (d, J = 6.8 Hz, 3H), 1.24-1.32 (m, 1H), 1.44-1.59 (m, 2H), 1.71-2.20 (m, 11H), 1.72 (s, 3H), 2.04 (s, 3H), 2.27-2.45 (m, 3H), 2.34 (s, 3H), 2.60-2.83 (m, 4H), 2.89-3.13 (m, 4H), 3.02 (s, 3H), 3.16-3.27 (m, 3H), 10 3.37 (s, 1H), 3.50 (s, 2H), 3.65 (d, J = 9.7 Hz, 2H), 3.72-3.90 (m, 1H), 4.81 (d, J = 10.4 Hz, 1H), 5.32 (dd, J = 12.6 Hz, 9.2 Hz, 1H), 5.86-6.00 (m, 1H), 6.18-6.35 (m, 3H), 7.24-7.33 (m, 5H), 8.24 (s, 1H), 9.47 (s, 1H), 14.55 (s, 1H). 13C NMR (75 MHz, CDCl3): (mixture of rotamers) δ 7.65, 8.79, 10.92, 12.02, 17.18, 20.11, 20.82, 20.84, 22.32, 25.81, 31.73, 31.84, 32.73, 35.19, 36.12, 37.04, 38.04, 38.93, 41.70, 15 46.30, 51.43, 51.98, 56.14, 63.10, 66.26, 71.85, 73.50, 76.32, 83.00, 94.74, 104.27, 107.66, 109.29, 111.43, 114.79, 115.63, 123.47, 124.82, 127.08, 128.23, 129.21, 132.28, 132.73, 138.15, 140.57, 141.75, 146.09, 154.89, 164.67, 167.91, 168.33, 169.29, 171.36, 180.56, 192.33.

P6306PC00 – 175 – Example 19: Synthesis of Compound 91 Following the above , itle compound was obtained as a purple solid (yield = 35 %). LC/MS A (ESI+): T = 2.01 min + R , m/z [M+H] = 1049.57, UV 5 purity : 99 % (254 nm). 1H NMR (300 MHz, CDCl ₃ ): (mixture of rotamers) δ -0.06 (d, J = 7.0 Hz, 3H), 0.59 (d, J = 6.8 Hz, 3H), 0.81 (d, J = 6.9 Hz, 3H), 0.93 (d, J = 6.7 Hz, 6H), 1.01 (d, J = 6.9 Hz, 3H), 1.35-1.52 (m, 1H), 1.68-2.14 (m, 7H), 1.73 (s, 3H), 2.03 (s, 3H), 2.27-2.48 (m, 7H), 2.31 (s, 3H), 2.60-2.75 (m, 2H), 2.91-3.03 (m, 2H), 3.06 (s, 3H), 3.18 (d, J = 9.9 Hz, 1H), 3.27-3.47 (m, 10 6H), 3.48-3.59 (m, 4H), 3.59-3.70 (m, 2H), 4.81 (d, J = 10.6 Hz, 1H), 5.14 (dd, J = 12.5 Hz, 7.6 Hz, 1H), 5.98 (dd, J = 15.6 Hz, 6.6 Hz, 1H), 6.16 (d, J = 12.5 Hz, 1H), 6.24 (d, J = 10.3 Hz, 1H), 6.37 (dd, J = 15.6 Hz, 10.4 Hz, 1H), 7.24-7.33 (m, 5H), 8.25 (s, 1H), 9.09 (s, 1H), 14.73 (s, 1H). 13C NMR (75 MHz, CDCl3): (mixture of rotamers) δ 8.01, 9.10, 11.35, 11.47, 17.63, 15 20.57, 21.14, 22.30, 26.06, 33.22, 35.55, 36.41, 37.80, 37.91, 38.55, 41.42, 42.20, 46.60, 51.65, 51.71, 52.80, 53.17, 57.03, 63.11, 66.49, 72.85, 74.46, 76.84, 81.20, 94.77, 104.93, 107.66, 109.20, 112.06, 114.64, 115.60, 124.41, 125.35, 127.63, 128.66, 129.44, 131.45, 133.35, 137.76, 141.14, 142.27, 144.89, 155.51, 164.51, 168.55, 168.65, 168.68, 171.67, 181.37, 192.81.

P6306PC00 – 176 – Example 20: Synthesis of Compound 95 Following the abov , tle compound was obtained as a purple solid (yield = 45 %). LC/MS A (ESI+): T = 2.02 m + R in, m/z [M+H] = 1075.60, UV 5 purity : 99 % (254 nm). 1H NMR (300 MHz, CDCl ₃ ): (mixture of rotamers) δ -0.10 (d, J = 6.8 Hz, 3H), 0.60 (d, J = 6.5 Hz, 3H), 0.81 (d, J = 6.6 Hz, 3H), 0.98 (d, J = 6.5 Hz, 3H), 1.18 (d, J = 6.4 Hz, 6H), 1.28-1.48 (m, 2H), 1.60-1.80 (m, 2H), 1.65 (s, 3H), 1.81-1.95 (m, 1H), 1.99 (s, 3H), 2.17-2.39 (m, 2H), 2.29 (s, 3H), 2.65-2.91 (m, 4H), 2.97 (d, J = 7.0 Hz, 2H), 3.04-3.14 (m, 1H), 3.07 (s, 10 3H), 3.15-3.43 (m, 10H), 3.45-3.75 (m, 10H), 3.94-4.04 (m, 1H), 4.78 (d, J = 10.7 Hz, 1H), 5.20 (dd, J = 12.4 Hz, 8.8 Hz, 1H), 5.88 (dd, J = 15.1 Hz, 6.7 Hz, 1H), 6.12-6.36 (m, 3H), 7.08- 7.23 (m, 4H), 8.25 (s, 1H), 8.98 (s, 1H), 14.47 (s, 1H). 13C NMR (75 MHz, CDCl3): (mixture of rotamers) δ 8.09, 9.18, 11.37, 11.66, 17.38, 20.55, 21.57, 22.46, 24.83, 32.79, 33.04, 33.71, 36.06, 36.19, 36.72, 38.02, 39.01, 40.66, 41.41, 15 45.05, 50.71, 51.42, 51.77, 51.88, 56.87, 65.35, 67.12, 72.53, 74.09, 76.74, 82.09, 91.36, 105.51, 108.02, 109.27, 111.85, 115.02, 115.44, 124.47, 124.68, 124.72, 124.77, 127.33, 131.84, 133.13, 140.23, 140.54, 141.70, 145.63, 156.69, 164.54, 168.17, 168.35, 171.45, 182.05, 193.05.

P6306PC00 – 177 – Example 21: Synthesis of Compound 98 Following the above , itle compound was obtained as a purple solid (yield = 56 %). LC/MS A (ESI+): T = 2.01 min, m/z [M+H + R ] = 1055.58, UV 5 purity : 99 % (254 nm). 1H NMR (300 MHz, CDCl ₃ ): (mixture of rotamers) δ -0.05 (d, J = 7.0 Hz, 3H), 0.59 (d, J = 6.9 Hz, 3H), 0.78-0.95 (m, 2H), 0.81 (d, J = 6.9 Hz, 3H), 0.92 (d, J = 6.5 Hz, 6H), 1.02 (d, J = 7.0 Hz, 3H), 1.14-1.21 (m, 2H), 1.37-1.53 (m, 2H), 1.63-1.87 (m, 9H), 1.73 (s, 3H), 1.89- 2.00 (m, 2H), 2.01-2.16 (m, 4H), 2.03 (s, 3H), 2.23-2.41 (m, 7H), 2.30 (s, 3H), 2.53-2.71 (m, 10 2H), 2.87-3.01 (m, 2H), 3.07 (s, 3H), 3.14-3.22 (m, 1H), 3.29-3.41 (m, 5H), 3.42-3.57 (m, 3H), 3.58-3.70 (m, 2H), 4.79 (dd, J = 10.7 Hz, 0.9 Hz, 1H), 5.13 (dd, J = 12.6 Hz, 7.6 Hz, 1H), 5.98 (dd, J = 15.6 Hz, 6.6 Hz, 1H), 7.17 (d, J = 12.5 Hz, 1H), 6.24 (dd, J = 10.3 Hz, 1.0 Hz, 1H), 6.38 (dd, J = 15.6 Hz, 10.4 Hz, 1H), 8.21 (s, 1H), 9.11 (s, 1H), 14.73 (s, 1H). 13C NMR (75 MHz, CDCl3): (mixture of rotamers) δ 8.02, 9.11, 11.40, 11.50, 17.64, 15 20.56, 21.13, 21.15, 22.33, 26.15, 26.38, 27.07, 32.09, 33.25, 35.25, 35.71, 36.56, 37.82, 37.92, 38.54, 41.46, 42.26, 46.64, 51.70, 51.77, 53.36, 53.91, 57.04, 65.70, 66.60, 72.87, 74.51, 76.90, 81.25, 94.92, 104.91, 107.68, 109.20, 112.08, 114.62, 115.57, 124.43, 125.37, 131.44, 133.38, 141.20, 142.23, 145.00, 155.47, 164.42, 168.57, 168.67, 168.83, 171.66, 181.30, 192.76.

P6306PC00 – 178 – Example 22: Synthesis of Compound 99 Following the above , title compound was obtained as a purple solid (yield = 23 %). LC/MS A (ESI+): T + R = 2.00 min, m/z [M+H] = 1036.54, UV 5 purity : 99 % (254 nm). 1H NMR (300 MHz, CDCl3): (mixture of rotamers) δ -0.05 (d, J = 7.1 Hz, 3H), 0.60 (d, J = 6.8 Hz, 3H), 0.81 (d, J = 7.0 Hz, 3H), 0.92 (d, J = 6.5 Hz, 6H), 1.02 (d, J = 7.0 Hz, 3H), 1.36-1.48 (m, 1H), 1.72-2.11 (m, 7H), 1.72 (s, 3H), 2.03 (s, 3H), 2.23-2.31 (m, 2H), 2.28 (s, 3H), 2.31-2.42 (m, 1H), 2.50-2.75 (m, 2H), 2.86-3.02 (m, 2H), 3.09 (s, 3H), 3.13-3.23 (m, 1H), 10 3.34 (dd, J = 7.8 Hz, 2.5 Hz, 1H), 3.40-3.70 (m, 12H), 3.73-3.84 (m, 1H), 4.81 (dd, J = 10.6 Hz, 1.0 Hz, 1H), 5.17 (dd, J = 12.6 Hz, 7.9 Hz, 1H), 5.96 (dd, J = 15.5 Hz, 6.6 Hz, 1H), 6.15- 6.28 (m, 2H), 6.36 (dd, J = 15.6 Hz, 10.4 Hz, 1H), 6.63-6.70 (m, 2H), 7.49 (dd, J = 7.2 Hz, 1.9 Hz, 0.5H), 7.52 (dd, J = 7.2 Hz, 1.9 Hz, 0.5H), 8.19 (dd, J = 5.1 Hz, 1.8 Hz, 1H), 8.24 (s, 1H), 9.16 (s, 1H), 14.71 (s, 1H). 15 13C NMR (75 MHz, CDCl ₃ ): (mixture of rotamers) δ 7.97, 9.12, 11.47, 11.58, 17.61, 20.55, 21.13, 21.15, 22.39, 26.12, 33.21, 35.65, 36.51, 37.70, 37.99, 38.65, 41.54, 41.87, 45.34, 45.43, 46.23, 51.70, 51.76, 56.99, 66.58, 72.73, 74.48, 76.85, 81.63, 94.92, 104.85, 107.60, 107.74, 109.26, 112.02, 114.34, 114.72, 115.51, 124.34, 125.31, 131.61, 133.31, 138.03, 141.09, 142.21, 145.30, 148.32, 155.43, 159.29, 164.85, 168.52, 168.55, 168.64, 171.62,20 181.24, 192.74. Example 23: Antibacterial Activity of Inventive Compounds MIC values were determined by broth microdilution method according to the CLSI guideline. Unless otherwise mentioned, MIC against A. baumannii was performed in RPMI medium supplemented with 10% FCS. MIC against S. pneumoniae and S. pyogenes was performed in cation adjusted Mueller Hinton broth supplemented with 5% laked horse blood. MIC against H. influenzae was performed in Hemophilus test medium broth. MIC against M. abscessus, M. tuberculosis and M. smegmatis was performed in Middlebrook 7H9 broth supplemented with Middlebrook ADC growth supplement (10%). All other MIC were performed in standard cation adjusted Mueller Hinton broth, which was supplemented with Middlebrook ADC growth supplement (5%) for the slow growing mycobacteria (M. xenopi, M. kansasii and AT. avium).

The following procedure applies to all species tested except M. tuberculosisand M. smegmatis. Cells were resuspended from a plate culture (overnight to 7 days culture depending on the species) in 0.9% (w/v) saline solution and bacterial inoculum was prepared in the respective testing medium with 5x10 ⁵ CFU/mL. For M. xenopi, the inoculum was prepared from a fresh liquid culture (7H9+ADC) instead of a plate. The appropriate volumes of a 10 mg/mL compound solution were directly dispensed in the 96-well assay plate using a digital dispenser to create two-fold dilution series from 32 to 0.00006 pg/mL final concentration (range adapted depending on the species). 100 pL of bacterial suspension was finally added to the compounds. Plates were covered and incubated without shaking at 35 °C for 20 hours to 7 days or more depending on the species. Every experiment contained an antibiotic as quality control. MIC was determined visually as the lowest concentration of a compound that prevents visible growth of the bacteria.

A similar procedure was used for M. tuberculosis and M. smegmatis, except that the inoculum was prepared from an exponentially growing culture and set to an ODeoo of 0.02 and 0.002 for AT. tuberculosis and M. smegmatis, respectively. The MIC was determined at 90% growth inhibition using a GFP reporter after 5 days incubation for M. tuberculosis and using the BacTiter-Glo kit (Promega) after 20 hours incubation for M. smegmatis.

The in vitro activity of compounds described herein was determined against 5. aureus (UAMS-1625 strain), A. baumannii (HUMCI strain), M. abscessus (ATCC 19977), M. kansasii (ATCC 12478), M. avium (ATCC 25291), and M. xenopi (ATCC 19250). The MIC values, given in pg/mL, are given in Table 4, below.

Table 4: In vitro activity of described compounds against S. aureus, A. baumannii, M. abscessus, M. kansasii, M. xenopi and M. avium.

In vitro Activity Against M abscessus Complex

Compound 3, rifabutin, rifampicin, 3-(4-morpholinyl)rifamycin S, and CGP4832 were tested for MIC activity against the following five isolates of the Mycobacterium abscessus complex: (1) M. abscessus subsp. abscessus,' strain ID No. ATCC 19977; (2) M. abscessus subsp. abscessus,' strain ID No. CCUG 71636; (3)M abscessus subsp. abscessus,' strain ID No. CCUG 71382; (4) M. abscessus subsp. bolletii,' strain ID No. CCUG 50184; and (5) M. abscessus subsp. massiliense,' strain ID No. CCUG 48898. The structures of rifabutin, rifampicin, 3-(4-morpholinyl)rifamycin S, and CGP4832 and results are given below.

Rifabutin Rifampicin

Compound 3

Table 5: In vitro activity against M. abscessus isolates in Middlebrook 7H9 broth supplemented with Middlebrook ADC growth supplement

In addition, Compounds 85, 90 and 98 were tested against the same five isolates of the Mycobacterium abscessus complex used above in Table 5, in CAMHB medium. Data are shown in Table 6 below.

Table 6: In vitro activity against M. abscessus isolates in CAMHB

In vitro Activity Against A. baumannii

Compound 3, rifabutin, rifampicin, 3-(4-morpholinyl)rifamycin S, and CGP4832 were tested for MIC activity against the following isolates of A. baumannii'. wild type (WT); Arr-2, RpoB H535Q mutant; RpoB H535C mutant; and RpoB H535L mutant. The results are given in Table 7, below.

Table 7: In vitro activity against A. baumannii isolates.

ND: not determined

In vitro Activity Against Additional Bacterial Species In addition, Compound 3, rifabutin, rifampicin, 3-(4-morpholinyl)rifamycin S, and

CGP4832 were tested for MIC activity against strains from the following species: Enterococcus faecium (strain NCTC 12204), Enterococcus faecalis (strain ATCC 51575), Staphylococcus epidermidis (strain ATCC 12228), Streptococcus pneumoniae (strain ATCC 49619), Streptococcus pyogenes (strain IHMA 1117021), Hemophilus influenzae (strain ATCC 49247), Mycobacterium tuberculosis (H37Rv, strain ATCC 27294) and M. smegmatis (strain ATCC 700084). The results are given in Table 8, below. Table 8: In vitro activity against other species