TRITERPENOID INHIBITORS OF HUMAN IMMUNODEFICIENCY VIRUS REPLICATION

FIELD OF THE INVENTION

5 The invention relates to compounds, compositions, and methods for the treatment of human immunodeficiency virus (HIV) infection. More particularly, the invention provides novel triterpenoid compounds as inhibitors of HIV, pharmaceutical

compositions containing such compounds, and methods for using these compounds in the treatment of HIV infection. The invention also relates to methods for making the

10 compounds hereinafter described.

BACKGROUND OF THE INVENTION

Acquired immunodeficiency syndrome (AIDS) is the result of infection by HIV. 15 HIV infection remains a major medical problem, with an estimated 45-50 million people infected worldwide at the end of 2011 , 3.3 million of them under the age of 15. In 2011 , there were 2.5 million new infections, and 1.7 million deaths from complications due to HIV/AIDS.

Current therapy for HIV-infected individuals consists of a combination of

20 approved anti -retroviral agents. Over two dozen drugs are currently approved for HIV

infection, either as single agents or as fixed dose combinations or single tablet regimens, the latter two containing 2-4 approved agents. These agents belong to a number of different classes, targeting either a viral enzyme or the function of a viral protein during the virus replication cycle. Thus, agents are classified as either nucleotide reverse

25 transcriptase inhibitors (NRTIs), non-nucleotide reverse transcriptase inhibitors

(NNRTIs), protease inhibitors (Pis), integrase inhibitors (INIs), or entry inhibitors (one, maraviroc, targets the host CCR5 protein, while the other, enfuvirtide, is a peptide that targets the gp41 region of the viral gpl60 protein). In addition, a pharmacokinetic enhancer with no antiviral activity, i.e., cobicistat, available from Gilead Sciences, Inc. 30 under the tradename TYBOST™ (cobicistat) tablets, has recently been approved for use in combinations with certain antiretroviral agents (ARVs) that may benefit from boosting. Despite the armamentarium of agents and drug combinations, there remains a medical need for new anti-retroviral agents, due in part to the need for chronic dosing to combat infection. Significant problems related to long-term toxicities are documented, creating a need to address and prevent these co-morbidities (e.g. CNS, CV/metabolic, renal disease). Also, increasing failure rates on current therapies continue to be a problem, due either to the presence or emergence of resistant strains or to non-compliance attributed to drug holidays or adverse side effects. For example, despite therapy, it has been estimated that 63% of subjects receiving combination therapy remained viremic, as they had viral loads >500 copies/mL (Oette, M, Kaiser, R, Daumer, M, et al. Primary HIV Drug Resistance and Efficacy of First-Line Antiretroviral Therapy Guided by Resistance Testing. J Acq Imm Def Synd 2006; 41(5):573-581). Among these patients, 76% had viruses that were resistant to one or more classes of antiretroviral agents. As a result, new drugs are needed that are easier to take, have high genetic barriers to the development of resistance and have improved safety over current agents. In this panoply of choices, novel MOAs that can be used as part of the preferred highly active antiretroviral therapy (HAART) regimen can still have a major role to play since they should be effective against viruses resistant to current agents.

Certain therapeutic compounds are disclosed in WO 2013/006738, WO

2014/110298, and WO 2014/134566.

What is now needed in the art are additional compounds which are novel and useful in the treatment of HIV. Additionally, these compounds may desireably provide advantages for pharmaceutical uses, for example, with regard to one or more of their mechanisms of action, binding, inhibition efficacy, target selectivity, solubility, safety profiles, or bioavailability. Also needed are new formulations and methods of treatment which utilize these compounds.

SUMMARY OF THE INVENTION

The invention encompasses compounds of Formula I, including pharmaceutically acceptable salts thereof, as well as pharmaceutical compositions, and their use in inhibiting HIV and treating those infected with HIV or AIDS. In one aspect of the invention, there is provided a compound of Formula I, including pharmaceutically acceptable salts thereof:

Formula I

wherein Ri is isopropenyl or isopropyl; X is a phenyl or heteroaryl ring substituted with A, wherein A is at least one member selected from -H, -halo, -hydroxyl, -Ci-6 alkyl, -Ci-6 alkoxy, and -COOR2;

R2 is -H, -Ci-6 alkyl, -alkylsubstituted Ci-6 alkyl or-arylsubstituted Ci-6 alkyl; Y is selected from -COOR2, -C(0)NR ₂ S0 ₂ R3, - C(0)NHS0 ₂ NR2R2, -NR2SO2R2,

-SO2NR2R2, -C3-6 cycloalkyl-COOR2, -C2-6 alkenyl-COOR2, -C2-6 alkynyl-COOR2, -Ci-e alkyl-COOR2, -NHC(0)(CH ₂ )n-COOR2, -S0 ₂ NR ₂ C(0)R2, -tetrazole, and -CONHOH, wherein n = 1-6; R3 is -Ci-6 alkyl or -alkylsubstituted Ci-6 alkyl;

W is selected from -CH2OR2, -COOR2, -NR4R5, -CONR26R27, -CH2NR26R27, -NR4COR6, -NR ₄ C(0)NR ₄ R5, and -NR4COOR,;

R41S selected from -H, -Ci-6 alkyl, -Ci-6 alkyl-C(OR3)2-C3-6 Cycloalkyl, -Ci-6 substituted alkyl, -Ci-6 alkyl-C3-6 cycloalkyl, -Ci-6 alkyl-Qi, -Ci-6 alkyl-C3-6 cycloalkyl-Qi, aryl, heteroaryl, substituted heteroaryl, -CORe, -COCORe, -SO2R7, -SO2NR2R2, wherein Qi is selected from C3-10 carbocycle, substituted C3-10 carbocycle, C3-10 heterocycle, substituted C3-10 hetereocycle, aryl, heteroaryl, substituted heteroaryl, halogen, -CF ₃ , -OR2, -COOR2, -NRsR -CONR10R11 and -SO2R7;

R5 is selected from -H, -Ci-6 alkyl, -C3-6 cycloalkyl, -Ci-6 alkylsubstituted alkyl, -Ci-6 alkyl-NR ₈ R9, -CORe, -COCORe, -SO2R7 and -SO2NR2R2; with the proviso that only one of R4 or R5 can be selected from -CORe, -COCORe,

R6 is selected from -H, -Ci-6 alkyl, -Ci-6 alkyl-substitutedalkyl, -C3-6 cycloalkyl, -C3-6 substitutedcycloalkyl-Q2, -Ci-6 alkyl-Q2, -Ci-6 alkyl-substitutedalkyl-Q2,-C3-6 cycloalkyl- Q2, aryl-Q2, -NR13R14, and -OR15; wherein Q2 is selected from C3-10 carbocycle, substituted C3-10 carbocycle, C3-10 heterocycle, substituted C3-10 hetereocycle, aryl, heteroaryl, substituted heteroaryl, -OR2, -COOR2, -NR8R9, SO2R7, -CONHSO2R3, and -CONHSO2NR2R2; R7 is selected from -Ci-6 alkyl, -Ci-6 substituted alkyl, -C3-6 cycloalkyl, aryl, and heteroaryl;

Re and R9 are independently selected from -H, -Ci-6 alkyl, -Ci-6 substituted alkyl, aryl, heteroaryl, substituted aryl, substituted heteroaryl, -Ci-6 alkyl-Q2, and -COOR3, or Rs and R9 are taken together with the adjacent N to form a cycle selected from:

V is selected from -CR24R25, -SO2, -O and -NR12;

M is selected from -CHR24R25, -NRieRiv, -SO2R7, -SO2NR3R3 and -OH; with the proviso that only one of Rs or R9 can be -COOR3; Rio and Rn are independently selected from -H, -Ci-6 alkyl, -Ci-6 substituted alkyl and -C3-6 cycloalkyl,

Ri 1 are taken together with the adjacent N to form a cycle such as

R121S selected from -Ci-6 alkyl, -Ci-6 alkyl-OH; -Ci-6 alkyl, -Ci-6 substituted alkyl,-C3-6 cycloalkyl, -COR7, -COONR22R23, -SOR7, and -SONR24R25;

Ri3 and R14 are independently selected from -H, -Ci-6 alkyl, -C3-6 cycloalkyl, -Ci-6 substituted alkyl, -Ci-6 alkyl-Q3, -Ci-6 alkyl-C3-6 Cycloalkyl-Q3 and Ci-6 substituted alkyl- :

Q3 is selected from heteroaryl, substituted heteroaryl, -NR20R21, ^" CONR2R2, -COOR2,

Ri5 is selected from -Ci-6 alkyl, -C3-6 cycloalkyl, -Ci-6 substituted alkyl, -Ci-6 alkyl-Q3, -Ci- 6 alkyl-C3-6 cycloalkyl-Q3 and -Ci-6 substituted alkyl-Q3;

Ri6 is selected from -H, -Ci-6 alkyl, -NR2R2, and -COOR3; Ri7 is selected from -H, -Ci-6 alkyl, -COOR3, and aryl;

Ri8 is selected from -COOR2 and -Ci-6 alkyl-COOR2;

Ri9 is selected from -H, -Ci-6 alkyl, -Ci-6 alkyl-Q4, -COR3, -COOR3,

wherein Q4 is selected from -NR2R2 and -OR2;

R20 and R21 are independently selected from -H, -Ci-6 alkyl, -Ci-6 substituted alkyl, -Ci-6 substituted alkyl-OR2, and -COR3,

or R20 with the proviso that only one of R20 or R2i can be -COR3;

R22 and R23 are independently selected from H, -Ci-6 alkyl, -Ci-6 substituted alkyl, and -Ci 6 cycloalkyl,

or R22 and R23 are taken togethe a cycle selected from

R24 and R25 are independently from the group of H, -Ci-6 alkyl, -Ci-6 substituted alkyl, -Ci- 6 alkyl-Qi, -Ci-6 cycloalkyl, aryl, substituted aryl, heteroaryl, and substituted heteroaryl, and Q5 is selected from halogen and SO2R3.,

R26 and R27 are independently selected from -H, -Ci-6 alkyl, -Ci-6 substituted alkyl, aryl, heteroaryl, substituted aryl, substituted heteroaryl, -Ci-6 alkyl-Q2,

or R26 and R27 are taken together with the adjacent N to form a cycle selected from:

With respect to the compounds of Formula I, the "— X-Y" substituent at the C-3 position, has the indicated stereochemistry as shown below with the "dotted wedge". In constrast, many substituted triterpenoid compounds have the opposite stereochemistry at the C-3 position, which would instead be indicated by a "solid wedge".

Formula I In an aspect of the invention, there is provided a composition useful for treating HIV infection comprising a therapeutic amount of a compound of Formula I and a

pharmaceutically acceptable carrier. In an aspect of the invention, the composition further comprises a therapeutically effective amount at least one other agent used for treatment of AIDS or HIV infection selected from nucleoside HIV reverse transcriptase inhibitors, non-nucleoside HIV reverse transcriptase inhibitors, HIV protease inhibitors, HIV fusion inhibitors, HIV attachment inhibitors, CCR5 inhibitors, CXCR4 inhibitors, HIV budding or maturation inhibitors, and HIV integrase inhibitors, and a pharmaceutically acceptable carrier. In an aspect of the invention, the other agent is dolutegravir. In an aspect of the invention, there is provided a method for treating HIV infection comprising administering a therapeutically effective amount of a compound of Formula I, or a pharmaceutically acceptable salt thereof, to a patient in need thereof. In an aspect of the invention, the method further comprises administering a therapeutically effective amount of at least one other agent used for treatment of AIDS or HIV infection selected from nucleoside HIV reverse transcriptase inhibitors, non-nucleoside HIV reverse transcriptase inhibitors, HIV protease inhibitors, HIV fusion inhibitors, HIV attachment inhibitors, CCR5 inhibitors, CXCR4 inhibitors, HIV budding or maturation inhibitors, and HIV integrase inhibitors. In an aspect of the invention, the other agent is dolutegravir. In an aspect of the invention, the other agent is administered to the patient prior to, simultaneously with, or subsequently to the compound of Formula I.

Also provided as part of the invention are one or more methods for making the compounds of the invention.

The present invention is directed to these, as well as other important ends, hereinafter described.

DETAILED DESCRIPTION OF THE INVENTION

The singular forms "a", "an", and "the" include plural reference unless the context dictates otherwise.

Unless otherwise expressly set forth elsewhere in the application, the following terms shall have the following meanings:

"Alkenyl" means a straight or branched alkyl group comprised of 2 to 10 carbons with at least one double bond and optionally substituted with 0-3 halo or alkoxy group.

"Alkenyloxy" means an alkenyl group attached to the parent structure by an oxygen atom.

"Alkoxy" means an alkyl group attached to the parent structure by an oxygen atom.

"Alkoxycarbonyl" means an alkoxy group attached to the parent structure by a carbonyl moiety. "Alkyl" means a straight or branched saturated hydrocarbon comprised of 1 to 10 carbons, and preferably 1 to 6 carbons.

"Alkylthioxy" means an alkyl group attached to the parent structure through a sulfur atom.

"Alkynyl" means a straight or branched alkyl group comprised of 2 to 10 carbons, preferably 2 to 6 carbons, containing at least one triple bond and optionally substituted with 0-3 halo or alkoxy group.

"Aryl" mean a carbocyclic group comprised of 1-3 rings that are fused and/or bonded and at least one or a combination of which is aromatic. The non-aromatic carbocyclic portion, where present, will be comprised of C3 to C7 alkyl group. Examples of aromatic group include, but are not limited to, phenyl, biphenyl, cyclopropylphenyl, indane, naphthalene, and tetrahydronaphthalene. The aryl group can be attached to the parent structure through any substitutable carbon atom in the group.

"Arylalkyl" is a C1-C5 alkyl group attached to 1 to 2 aryl groups and linked to the parent structure through the alkyl moiety. Examples include, but are not limited to, -(CH ₂ )nPh with n = 1-5, -CH(CH ₃ )Ph, -CH(Ph) ₂ .

"Aryloxy" is an aryl group attached to the parent structure by oxygen.

"Azaindole" means one of the "CH" moieties in the 6-member ring of an indole is substituted with a nitrogen atom.

"Azaindoline" means one of the aromatic "CH" moieties of an indoline is substituted with a nitrogen atom.

"Azatetrahydroquinoline" means any aromatic CH moiety of tetrahydroquinoline is substituted with a nitrogen atom.

"Benzyloxy" means a benzyl group is attached to the parent structure through an oxygen atom. The phenyl group of the benzyl moiety could be optionally substituted by 1-3 moieties independently selected from alkyl, alkoxy, halo, haloalkyl, haloalkoxy and cyano.

"Cx-Cy" notation indicates a structural element comprised of carbons numbering between 'x' and 'y · F° ^r example, "C5-C10 bicycloalkyl" means a bicyclic ring system comprised of 5 to 10 carbons, where the rings are attached in a fused, spiro or bridged manner; an example of C5-C10 bicycloalkyl include, but is not limited to,

bicyclo[2.2.2]octane. Similarly, "C3-C4 cycloalkyl" is a subset of monocyclic ring system comprised of 3 to 4 carbons. "Cycloalkyl" means a monocyclic ring system comprised of 3 to 7 carbons. "Cyano" refers to -CN.

"Diazaindole" means any two "CH" moieties in the 6-member ring of an indole are substituted with nitrogen atoms.

"Diazaindoline" means any two aromatic "CH" moieties of an indoline are substituted with a nitrogen atom.

"Diazatetrahydroquinoline" means any two aromatic CH moieties of tetrahydroquinoline are substituted with nitrogen atoms.

"Halo" or "halogen" refers to -F, -CI, -Br, or -I.

"Haloalkyl" means an alkyl group substituted by any combination of one to six halogen atoms.

"Haloalkoxy" or "Haloalkyloxy" means a haloalkyl group attached to the parent structure through an oxygen atom.

"Hydroxy" refers to -OH.

"Heteroaryl" is a subset of heterocyclic group as defined below and is comprised of 1-3 rings where at least one or a combination of which is aromatic and that the aromatic group contains at least one atom chosen from a group of oxygen, nitrogen or sulfur.

"Heterocyclyl or heterocyclic" means a cyclic group of 1-3 rings comprised of carbon and at least one other atom selected independently from oxygen, nitrogen and sulfur. The rings could be bridged, fused and/or bonded, through a direct or spiro attachment, with the option to have one or a combination thereof be aromatic. Examples include, but are not limited to, azaindole, azaindoline, azetidine, benzimidazole, bezodioxolyl, benzoisothiazole, benzothiazole, benzothiadiazole, benzothiophene, benzoxazole, carbazole, chroman, dihalobezodioxolyl, dihydrobenzofuran, dihydro- benzo[l,4]oxazine, l,3-dihydrobenzo[c]thiophene 2,2-dioxide, 2,3- dihydrobenzo[d]isothiazole 1,1-dioxide, 3,4-dihydro-2H-pyrido[3,2-b][l,4]oxazine, 2,3- dihydro-lH-pyrrolo[3,4-c]pyridine and its regioisomeric variants, 6,7-dihydro-5H- pyrrolo[2,3-b]pyrazine and its regioisomeric variants , furanylphenyl, imidazole, imidazo[l,2-a]pyridine, indazole, indole, indoline, isoquinoline, isoquinolinone, isothiazolidine 1,1-dioxide, morpholine, 2-oxa-5-azabicyclo[2.2.1]heptane, oxadiazole- phenyl, oxazole, phenylaztidine, phenylindazole, phenylpiperidine, phenylpiperizine, phenyloxazole, phenylpyrrolidine, piperidine, pyridine, pyridinylphenyl, pyridinylpyrrolidine, pyrimidine, pyrimidinylphenyl, pyrrazole-phenyl, pyrrolidine, pyrrolidin-2-one, lH-pyrazolo[4,3-c]pyridine and its regioisomeric variants, pyrrole, 5H- pyrrolo[2,3-b]pyrazine, 7H-pyrrolo[2,3-d]pyrimidine and its regioisomeric variants, quinazoline, quinoline, quinoxaline, tetrahydroisoquinoline, l,2,3,4-tetrahydro-l,8- naphthyridine, tetrahydroquinoline, 4,5,6,7-tetrahydrothieno[3,2-c]pyridine, 1,2,5- thiadiazolidine 1,1 -dioxide, thiophene, thiophenylphenyl, triazole, or triazolone. Unless otherwise specifically set forth, the heterocyclic group can be attached to the parent structure through any suitable atom in the group that results in a stable compound.

It is understood that a subset of the noted heterocyclic examples encompass regioisomers. For instance, "azaindole" refers to any of the following regioisomers: 1H- pyrrolo[2,3-b]pyridine, lH-pyrrolo[2,3-c]pyridine, lH-pyrrolo[3,2-c]pyridine, and 1H- pyrrolo[3,2-b]pyridine. In addition the "regioisomer variants" notation as in, for example, "5H-pyrrolo[2,3-b]pyrazine and its regioisomeric variants" would also encompass 7H- pyrrolo[2,3-d]pyrimidine, 7H-pyrrolo[2,3-c]pyridazine, lH-pyrrolo[2,3-d]pyridazine, 5H- pyrrolo[3,2-c]pyridazine, and 5H-pyrrolo[3,2-d]pyrimidine. Similarly, 6,7-dihydro-5H- pyrrolo[2,3-b]pyrazine and its regioisomeric variants would encompass 6,7-dihydro-5H- pyrrolo[2,3-d]pyrimidine and 6,7-dihydro-5H-pyrrolo[2,3-c]pyridazine. It is also understood that the lack of "regioisomeric variants" notation does not in any way restrict the claim scope to the noted example only.

"Heterocyclylalkyl" is a heterocyclyl moiety attached to the parent structure through C1-C5 alkyl group. Examples include, but are not limited to, -(CH2)n-R ^z or -CH(CH3)-(R ^Z ) where n = 1-5 and that R ^z is chosen from benzimidazole, imidazole, indazole, isooxazole, phenyl-pyrazole, pyridine, quinoline, thiazole, triazole, triazolone, oxadiazole.

"Triterpene" or "triterpenoid" means a class of compounds based on three terpene units, which are in turn each based on two isoprene units. Triterpenes exist in a large variety of structures and can be broadly divided according to the number of rings present. The triterpenoids of the present invention are in general pentacyclic structures, i.e. having five rings.

"Tetrahydroquinoline" means 1,2,3,4-tetrahydroquinoline.

Substituents which are illustrated by chemical drawing to bond at variable positions on a multiple ring system (for example a bicyclic ring system) are intended to bond to the ring where they are drawn to append. Parenthetic and multiparenthetic terms are intended to clarify bonding relationships to those skilled in the art. For example, a term such as ((R)alkyl) means an alkyl substituent further substituted with the substituent R.

Those terms not specifically set forth herein shall have the meaning which is commonly understood and accepted in the art.

The invention includes all pharmaceutically acceptable salt forms of the compounds. Pharmaceutically acceptable salts are those in which the counter ions do not contribute significantly to the physiological activity or toxicity of the compounds and as such function as pharmacological equivalents. These salts can be made according to common organic techniques employing commercially available reagents. Some anionic salt forms include acetate, acistrate, besylate, bromide, chloride, citrate, fumarate, glucouronate, hydrobromide, hydrochloride, hydroiodide, iodide, lactate, maleate, mesylate, nitrate, pamoate, phosphate, succinate, sulfate, tartrate, tosylate, and xinofoate. Some cationic salt forms include ammonium, aluminum, benzathine, bismuth, calcium, choline, diethylamine, diethanolamine, lithium, magnesium, meglumine,

4-phenylcyclohexylamine, piperazine, potassium, sodium, tromethamine, and zinc.

Some of the compounds of the invention exist in stereoisomeric forms. The invention includes all stereoisomeric forms of the compounds including enantiomers and diastereromers. Methods of making and separating stereoisomers are known in the art. The invention includes all tautomeric forms of the compounds. The invention includes atropisomers and rotational isomers.

The invention is intended to include all isotopes of atoms occurring in the present compounds. Isotopes include those atoms having the same atomic number but different mass numbers. By way of general example and without limitation, isotopes of hydrogen include deuterium and tritium. Isotopes of carbon include ¹³ C and ¹⁴ C. Isotopically- labeled compounds of the invention can generally be prepared by conventional techniques known to those skilled in the art or by processes analogous to those described herein, using an appropriate isotopically-labeled reagent in place of the non-labeled reagent otherwise employed. Such compounds may have a variety of potential uses, for example as standards and reagents in determining biological activity. In the case of stable isotopes, such compounds may have the potential to favorably modify biological, pharmacological, or pharmacokinetic properties. For the sake of efficiency some ring structures are shown with a variable number of members in the ring. For example, the following ring substituent having the parenthetical "( )i,2" is intended to encompass both a single carbon group, -(CH2)-, and a two carbon group, -(CH2CH2)-. The intended ring structures could individually be depicted as:

The compounds of the invention also include "prodrugs". The term "prodrug' used herein encompasses both the term "prodrug esters" and the term "prodrug ethers

The common numbering system for the general core of the pentacyclic triterpenoid compounds of the present invention is shown below for an illustrative triterpene: betulin. This numbering system is in accordance with IUPAC rules.

In an aspect of the invention, there is provided a compound of Formula I, including pharmaceutically acceptable salts thereof:

Formula I

wherein Ri is isopropenyl or isopropyl;

X is a phenyl or heteroaryl ring substituted with A, wherein A is at least one member selected from -H, -halo, -hydroxyl, -Ci-6 alkyl, -Ci-6 alkoxy, and -COOR2;

R2 is -H, -Ci-6 alkyl, -alkylsubstituted Ci-6 alkyl or-arylsubstituted Ci-6 alkyl;

Y is selected from -COOR2, -C(0)NR2S0 ₂ R3, - C(0)NHS0 ₂ NR2R2, -NR2SO2R2, -SO2NR2R2, -C3-6 cycloalkyl-COOR2, -C2-6 alkenyl-COOR2, -C2-6 alkynyl-COOR2, -Ci-e alkyl-COOR2, -NHC(0)(CH ₂ )n-COOR2, -S0 ₂ NR ₂ C(0)R2, -tetrazole, and -CONHOH, wherein n = 1-6;

R3 is -Ci-6 alkyl or -alkylsubstituted Ci-6 alkyl;

W is selected from -CH2OR2, -COOR2, -NR4R5, -CONR26R27, -CH2NR26R27, -NR4COR6, -NR ₄ C(0)NR ₄ R5, and -NR4COOR,;

R41S selected from -H, -Ci-6 alkyl, -Ci-6 alkyl-C(OR3)2-C3-6 cycloalkyl, -Ci-6 substituted alkyl, -Ci-6 alkyl-C3-6 cycloalkyl, -Ci-6 alkyl-Qi, -Ci-6 alkyl-C3-6 Cycloalkyl-Qi, aryl, heteroaryl, substituted heteroaryl, -CORe, -COCORe, -SO2R7, -SO2NR2R2, wherein Qi is selected from C3-10 carbocycle, substituted C3-10 carbocycle, C3-10 heterocycle, substituted C3-10 hetereocycle, aryl, heteroaryl, substituted heteroaryl, halogen, -CF3, -OR2, -COOR2, -NRsRsi, -CONR10R11 and -SO2R7; R5 is selected from -H, -Ci-6 alkyl, -C3-6 cycloalkyl, -Ci-6 alkylsubstituted alkyl, -Ci-6 alkyl-NR ₈ R9, -CORe, -COCORe, -SO2R7 and -SO2NR2R2; with the proviso that only one of R4 or R5 can be selected from -CORe, -COCORe,

R6 is selected from -H, -Ci-6 alkyl, -Ci-6 alkyl-substitutedalkyl, -C3-6 cycloalkyl, -C3-6 substitutedcycloalkyl-Q2, -Ci-6 alkyl-Q2, -Ci-6 alkyl-substitutedalkyl-Q2,-C3-6 cycloalkyl- Q ₂ , aryl-Q ₂ , -NR13R14, and -OR15; wherein Q2 is selected from C3-10 carbocycle, substituted C3-10 carbocycle, C3-10 heterocycle, substituted C3-10 hetereocycle, aryl, heteroaryl, substituted heteroaryl, -OR2, -COOR2, -NRsRs, SO2R7, -CONHSO2R3, and -CONHSO2NR2R2;

R7 is selected from -Ci-6 alkyl, -Ci-6 substituted alkyl, -C3-6 cycloalkyl, aryl, and heteroaryl;

Re and R9 are independently selected from -H, -Ci-6 alkyl, -Ci-6 substituted alkyl, aryl, heteroaryl, substituted aryl, substituted heteroaryl, -Ci-6 alkyl-Q2, and -COOR3,

V is selected from -CR24R25, -SO2, -O and -NR12; M is selected from -CHR24R25, -NRieRiv, -SO2R7, -SO2NR3R3 and -OH; with the proviso that only one of Rs or R9 can be -COOR3;

Rio and R11 are independently selected from -H, -Ci-6 alkyl, -Ci-6 substituted alkyl and -C3-6 cycloalkyl,

Ri 1 are taken together with the adjacent N to form a cycle such as

R12 1S selected from -Ci-6 alkyl, -Ci-6 alkyl-OH; -Ci-6 alkyl, -Ci-6 substituted alkyl,-C3-6 cycloalkyl, -COR7, -COONR22R23, -SOR7, and -SONR24R25; Ri3 and Ri4 are independently selected from -H, -Ci-6 alkyl, -C3-6 cycloalkyl, -Ci-6 substituted alkyl, -Ci-6 alkyl-Q3, -Ci-6 alkyl-C3-6 Cycloalkyl-Q3 and Ci-6 substituted alkyl- :

Q3 is selected from heteroaryl, substituted heteroaryl, -NR20R21, ^" CONR2R2, -COOR2, Ri5 is selected from -Ci-6 alkyl, -C3-6 cycloalkyl, -Ci-6 substituted alkyl, -Ci-6 alkyl-Q3, -Ci- 6 alkyl-C3-6 cycloalkyl-Q3 and -Ci-6 substituted alkyl-Q3;

Ri6 is selected from -H, -Ci-6 alkyl, -NR2R2, and -COOR3; Ri7 is selected from -H, -Ci-6 alkyl, -COOR3, and aryl;

Ri8 is selected from -COOR2 and -Ci-6 alkyl-COOR2;

Ri9 is selected from -H, -Ci-6 alkyl, -Ci-6 alkyl-Q4, -COR3, -COOR3,

wherein Q4 is selected from -NR2R2 and -OR2;

R20 and R21 are independently selected from -H, -Ci-6 alkyl, -Ci-6 substituted alkyl, -Ci-6 substituted alkyl-OR2, and -COR3, or R20 with the proviso that only one of R20 or R2i can be -COR3;

R22 and R23 are independently selected from H, -Ci-6 alkyl, -Ci-6 substituted alkyl, and -Ci- 6 cycloalkyl,

or R22 and R23 are taken togethe a cycle selected from

R24 and R25 are independently from the group of H, -Ci-6 alkyl, -Ci-6 substituted alkyl, -Ci- 6 alkyl-Q5, -C 1-6 cycloalkyl, aryl, substituted aryl, heteroaryl, and substituted heteroaryl, and Q5 is selected from halogen and SO2R3.,

R26 and R27 are independently selected from -H, -Ci-6 alkyl, -Ci-6 substituted alkyl, aryl, heteroaryl, substituted aryl, substituted heteroaryl, -Ci-6 alkyl-Q2,

In an aspect of the invention, there is provided a compound of Formula I, wherein

Ri is isopropyl. In an aspect of the invention, there is provided a compound of Formula, wherein X is phenyl. In an aspect of the invention, there is provided a compound of Formula I, wherein

In an aspect of the invention, there is provided a compound of Formula I, wherein

Y is -COOH.

In an aspect of the invention, there is provided a compound of Formula I, wherein A is -H.

In an aspect of the invention, there is provided a compound of Formula I, wherein R4 is selected from -H, -Ci-6 alkyl, -Ci-6 alkyl-Qi, and -CORe.

In an aspect of the invention, there is provided a compound of Formula I, wherein

In an aspect of the invention, there is provided a compound of Formula I, wherein

R4 is -Ci-6 alkyl-Qi.

In an aspect of the invention, there is provided a compound of Formula I, wherein

In an aspect of the invention, there is provided a compound of Formula I, wherein R ₄ is -CORe.

In an aspect of the invention, there is provided a compound of Formula I, wherein

In an aspect of the invention, there is provided a compound of Formula I, wherein

In an aspect of the invention, there is provided a compound of Formula I, wherein

W is -COOH. In an aspect of the invention, there is provided a compound of Formula I, wherein

In an aspect of the invention, there is provided a compound of Formula I, wherein

In an aspect of the invention, there is provided a compound of Formula I, wherein

In an aspect of the invention, there is provided a compound of Formula I, wherein

In an aspect of the invention, there is provided a compound of Formula I, wherein

In an aspect of the invention, there is provided a compound of Formula I, whereinW is - NR4COOR,.

In an aspect of the invention, there is provided a compound, including pharmaceutically acceptable salts thereof, which is selected from:

-23-

In an aspect of the invention, there is provided a pharmaceutical composition which comprises an antiviral effective amount of one or more of the compounds of the present invention, together with one or more pharmaceutically acceptable carriers, excipients or diluents.

In an aspect of the invention, there is provided a composition useful for treating HIV infection comprising a therapeutic amount of a compound of Formula I and a

pharmaceutically acceptable carrier. In an aspect of the invention, the composition further comprises a therapeutically effective amount at least one other agent used for treatment of AIDS or HIV infection selected from nucleoside HIV reverse transcriptase inhibitors, non-nucleoside HIV reverse transcriptase inhibitors, HIV protease inhibitors, HIV fusion inhibitors, HIV attachment inhibitors, CCR5 inhibitors, CXCR4 inhibitors, HIV budding or maturation inhibitors, and HIV integrase inhibitors, and a pharmaceutically acceptable carrier. In an aspect of the invention, the other agent is dolutegravir.

In an aspect of the invention, there is provided a method for treating HIV infection comprising administering a therapeutically effective amount of a compound of Formula I, or a pharmaceutically acceptable salt thereof, to a patient in need thereof. In an aspect of the invention, the method further comprises administering a therapeutically effective amount of at least one other agent used for treatment of AIDS or HIV infection selected from nucleoside HIV reverse transcriptase inhibitors, non-nucleoside HIV reverse transcriptase inhibitors, HIV protease inhibitors, HIV fusion inhibitors, HIV attachment inhibitors, CCR5 inhibitors, CXCR4 inhibitors, HIV budding or maturation inhibitors, and HIV integrase inhibitors. In an aspect of the invention, the other agent is dolutegravir. In an aspect of the invention, the other agent is administered to the patient prior to, simultaneously with, or subsequently to the compound of Formula I.

Pharmaceutical Compositions and Methods of Use

The compounds of the invention herein described and set forth are generally given as pharmaceutical compositions. These compositions are comprised of a therapeutically effective amount of a compound of Formula I or its pharmaceutically acceptable salt, and a pharmaceutically acceptable carrier and may contain conventional excipients and/or diluents. A therapeutically effective amount is that which is needed to provide a meaningful patient benefit. Pharmaceutically acceptable carriers are those conventionally known carriers having acceptable safety profiles. Compositions encompass all common solid and liquid forms, including capsules, tablets, lozenges, and powders, as well as liquid suspensions, syrups, elixirs, and solutions. Compositions are made using available formulation techniques, and excipients (such as binding and wetting agents) and vehicles (such as water and alcohols) which are generally used for compositions. See, for example, Remington's Pharmaceutical Sciences, 17th edition, Mack Publishing

Company, Easton, PA (1985).

Solid compositions which are normally formulated in dosage units and compositions providing from about 1 to 1000 mg of the active ingredient per dose are preferred. Some examples of dosages are 1 mg, 10 mg, 100 mg, 250 mg, 500 mg, and 1000 mg. Generally, other antiretroviral agents will be present in a unit range similar to agents of that class used clinically. Typically, this is about 0.25-1000 mg/unit.

Liquid compositions are usually in dosage unit ranges. Generally, the liquid composition will be in a unit dosage range of about 1-100 mg/mL. Some examples of dosages are 1 mg/mL, 10 mg/mL, 25 mg/mL, 50 mg/mL, and 100 mg/mL. Generally, other antiretroviral agents will be present in a unit range similar to agents of that class used clinically. Typically, this is about 1-100 mg/mL.

The invention encompasses all conventional modes of administration; oral and parenteral methods are preferred. Generally, the dosing regimen will be similar to other antiretroviral agents used clinically. Typically, the daily dose will be about 1-100 mg/kg body weight daily. Generally, more compound is required orally and less parenterally. The specific dosing regimen, however, will be determined by a physician using sound medical judgment.

The compounds of this invention desireably have activity against HIV.

Accordingly, another aspect of the invention is a method for treating HIV infection in a human patient comprising administering a therapeutically effective amount of a compound of Formula I, including a pharmaceutically acceptable salt thereof, with a pharmaceutically acceptable carrier, excipient and/or diluent.

The invention also encompasses methods where the compound is given in combination therapy. That is, the compound can be used in conjunction with, but separately from, other agents useful in treating AIDS and HIV infection. The compound can also be used in combination therapy wherein the compound and one or more of the other agents are physically together in a fixed-dose combination (FDC). Some of these agents include HIV attachment inhibitors, CCR5 inhibitors, CXCR4 inhibitors, HIV cell fusion inhibitors, HIV integrase inhibitors, HIV nucleoside reverse transcriptase inhibitors, HIV non-nucleoside reverse transcriptase inhibitors, HIV protease inhibitors, budding and maturation inhibitors, immunomodulators, and anti-infectives. In these combination methods, the compound of Formula I will generally be given in a daily dose of about 1-100 mg/kg body weight daily in conjunction with other agents. The other agents generally will be given in the amounts used therapeutically. The specific dosing regimen, however, will be determined by a physician using sound medical judgment.

"Combination," "coadministration," "concurrent" and similar terms referring to the administration of a compound of Formula I with at least one anti-HIV agent mean that the components are part of a combination antiretroviral therapy or HAART as understood by practitioners in the field of AIDS and HIV infection.

Thus, as set forth above, contemplated herein are combinations of the compounds of Formula I, together with one or more agents useful in the treatment of AIDS. For example, the compounds of the invention may be effectively administered, whether at periods of pre-exposure and/or post-exposure, in combination with effective amounts of the AIDS antivirals, immunomodulators, anti-infectives, or vaccines, such as those in the following non-limiting table:

ANTIVIRALS

Drug Name Manufacturer Indication

Rilpivirine Tibotec HIV infection, AIDS, ARC

(non-nucleoside

reverse transcriptase inhibitor) COMPLERA® Gilead HIV infection, AIDS,

ARC; combination with emtricitabine, rilpivirine, and tenofovir disoproxil fumarate

097 Hoechst/Bayer HIV infection,

AIDS, ARC

(non-nucleoside

reverse transcriptase (RT)

inhibitor)

Amprenavir Glaxo Wellcome HIV infection,

141 W94 AIDS, ARC

GW 141 (protease inhibitor)

Abacavir (1592U89) Glaxo Wellcome HIV infection,

GW 1592 AIDS, ARC

(RT inhibitor)

Acemannan Carrington Labs ARC

(Irving, TX) Acyclovir Burroughs Wellcome HIV infection, AIDS,

ARC

AD-439 Tanox Biosystems HIV infection, AIDS,

ARC

AD-519 Tanox Biosystems HIV infection, AIDS,

ARC Adefovir dipivoxil Gilead Sciences HIV infection

AL-721 Ethigen ARC, PGL

(Los Angeles, CA) HIV positive, AIDS Alpha Interferon Glaxo Wellcome Kaposi's sarcoma,

HIV in combination w/Retrovir

Ansamycin Adria Laboratories ARC

LM 427 (Dublin, OH)

Erbamont

(Stamford. CT)

Antibody which Advanced Biotherapy AIDS, ARC

Neutralizes pH Concepts

Labile alpha aberrant (Rockville, MD)

Interferon

AR177 Aronex Pharm HIV infection, AIDS,

ARC

Beta-fluoro-ddA Nat'l Cancer Institute AIDS-associated

diseases

CI-1012 Warner-Lambert HIV-1 infection

Cidofovir Gilead Science CMV retinitis,

herpes, papillomavirus

Curdlan sulfate AJI Pharma USA HIV infection

Cytomegalovirus Medlmmune CMV retinitis

Immune globin Cytovene Syntex Sight threatening

Ganciclovir CMV

peripheral CMV retinitis

Darunavir Tibotec- J & J HIV infection, AIDS, ARC

(protease inhibitor) Delaviridine Pharmacia-Upj ohn HIV infection,

AIDS, ARC

(RT inhibitor)

Dextran Sulfate Ueno Fine Chem. AIDS, ARC, HIV

Ind. Ltd. (Osaka, positive

Japan) asymptomatic ddC Hoffman-La Roche HIV infection, AIDS,

Dideoxycytidine ARC ddl Bristol-Myers Squibb HIV infection, AIDS,

Dideoxyinosine ARC; combination

with AZT/d4T DMP-450 AVID HIV infection,

(Camden, NJ) AIDS, ARC

(protease inhibitor) Efavirenz Bristol Myers Squibb HIV infection,

(DMP 266, SUSTIVA ^® ) AIDS, ARC

(-)6-Chloro-4-(S)- (non-nucleoside RT cyclopropylethynyl- inhibitor)

4(S)-trifluoro- methyl- 1 ,4-dihydro- 2H-3, 1 -benzoxazin- 2-one, STOCRINE EL10 Elan Corp, PLC HIV infection

(Gainesville, GA)

Etravirine Tibotec/ J & J HIV infection, AIDS, ARC

(non-nucleoside reverse transcriptase inhibitor)

Famciclovir Smith Kline herpes zoster,

herpes simplex

GS 840 Gilead HIV infection,

AIDS, ARC

(reverse transcriptase inhibitor)

HBY097 Hoechst Marion HIV infection,

Roussel AIDS, ARC

(non-nucleoside reverse transcriptase inhibitor)

Hypericin VIMRx Pharm. HIV infection, AIDS,

ARC Recombinant Human Triton Biosciences AIDS, Kaposi's Interferon Beta (Almeda, CA) sarcoma, ARC

Interferon alfa-n3 Interferon Sciences ARC, AIDS

Indinavir Merck HIV infection, AIDS,

ARC, asymptomatic HIV positive, also in combination with AZT/ddl/ddC

ISIS 2922 ISIS Pharmaceuticals CMV retinitis KNI-272 Nat'l Cancer Institute HIV-assoc. diseases Lamivudine, 3TC Glaxo Wellcome HIV infection,

AIDS, ARC

(reverse

transcriptase inhibitor); also with AZT

Lobucavir Bristol-Myers Squibb CMV infection

Nelfinavir Agouron HIV infection,

Pharmaceuticals AIDS, ARC

(protease inhibitor) Nevirapine Boeheringer HIV infection,

Ingleheim AIDS, ARC

(RT inhibitor) Novapren Novaferon Labs, Inc. HIV inhibitor

(Akron, OH)

Peptide T Peninsula Labs AIDS

Octapeptide (Belmont. CA)

Sequence

Trisodium Astra Pharm. CMV retinitis, HIV Phosphonoformate Products, Inc. infection, other CMV infections

PNU- 140690 Pharmacia Upjohn HIV infection,

AIDS, ARC

(protease inhibitor)

Probucol Vyrex HIV infection, AIDS RBC-CD4 Sheffield Med. HIV infection,

Tech (Houston, TX) AIDS, ARC

Ritonavir Abbott HIV infection,

AIDS, ARC

(protease inhibitor) Saquinavir Hoffmann- HIV infection,

LaRoche AIDS, ARC

(protease inhibitor)

Stavudine; d4T Bristol -Myers Squibb HIV infection, AIDS, Didehydrodeoxy- ARC

Thymidine Tipranavir Boehringer Ingelheim HIV infection, AIDS, ARC

(protease inhibitor)

Valaciclovir Glaxo Wellcome Genital HSV & CMV

Infections

Virazole Virate CN asymptomatic HIV

Ribavirin (Costa Mesa, CA) positive, LAS, ARC VX-478 Vertex HIV infection, AIDS,

ARC

Zalcitabine Hoffmann-LaRoche HIV infection, AIDS,

ARC, with AZT

Zidovudine; AZT Glaxo Wellcome HIV infection, AIDS,

ARC, Kaposi's

sarcoma, in combination with other therapies

Tenofovir disoproxil, HIV infection,

fumarate salt (VIREAD ^® ) AIDS,

(reverse transcriptase inhibitor)

EMTRIVA ^® Gilead HIV infection,

(Emtricitabine) (FTC) AIDS,

(reverse transcriptase inhibitor) COMBIVIR ^® GSK HIV infection,

AIDS,

(reverse transcriptase inhibitor)

Abacavir succinate HIV infection,

(or ZIAGEN ^® ) AIDS,

(reverse transcriptase inhibitor)

REYATAZ ^® Bristol-Myers Squibb HIV infection

(or atazanavir) AIDs, protease

inhibitor FUZEON ^® Roche / Trimeris HIV infection

(Enfuvirtide or T-20) AIDs, viral Fusion

inhibitor

LEXIVA ^® GSK/Vertex HIV infection

(or Fosamprenavir calcium) AIDs, viral protease

inhibitor

SELZENTRY™

Maraviroc; (UK 427857) HIV infection

AIDs, (CCR5 antagonist, in development)

TRIZIVIR ^® GSK HIV infection

AIDs, (three drug combination) Sch-417690 (vicriviroc) Schering-Plough HIV infection

AIDs, (CCR5 antagonist, in development)

TAK-652 Takeda HIV infection

AIDs, (CCR5 antagonist, in development)

GSK 873140 GSK/ONO HIV infection

(ONO-4128) AIDs, (CCR5 antagonist, in development)

Integrase Inhibitor Merck HIV infection

MK-0518 AIDs

Raltegravir

TRUVADA Gilead Combination of Tenofovir disoproxil fumarate salt (VIREAD ^® ) and EMTRIVA ³ (Emtricitabine)

Integrase Inhibitor Gilead/Japan Tobacco HIV Infection

GS917/JTK-303 AIDs

Elvitegravir in development

Triple drug combination Gilead/Bristol-Myers Squibb Combination of Tenofovir

ATRIPLA ® disoproxil fumarate salt

(VIREAD ^® ), EMTRIVA ³ (Emtricitabine), and

SUSTIVA ^® (Efavirenz) FESTINAVIR Oncolys BioPharma HIV infection

AIDs in development CMX-157 Chimerix HIV infection

Lipid conjugate of AIDs nucleotide tenofovir

GSK1349572 GSK HIV infection Integrase inhibitor AIDs

TIVICAY ^®

dolutegravir

IMMUNOMODULATORS

Drug Name Manufacturer Indication

AS-101 Wyeth-Ayerst AIDS Bropirimine Pharmacia Upjohn Advanced AIDS

Acemannan Carrington Labs, Inc. AIDS, ARC

(Irving, TX) CL246J38 Wyeth AIDS, Kaposi's

Lederle Labs sarcoma

FP-21399 Fuki ImmunoPharm Blocks HIV fusion with CD4+ cells Gamma Interferon Genentech ARC, in combination w/TNF (tumor necrosis factor) Granulocyte Genetics Institute AIDS

Macrophage Colony Sandoz

Stimulating Factor

Granulocyte Hoechst-Roussel AIDS

Macrophage Colony Immunex

Stimulating Factor

Granulocyte Schering-Plough AIDS,

Macrophage Colony combination Stimulating Factor w/AZT

HIV Core Particle Rorer Seropositive HIV Immunostimulant IL-2 Cetus AIDS, in combination

Interleukin-2 w/AZT

IL-2 Hoffman-LaRoche AIDS, ARC, HIV, in

Interleukin-2 Immunex combination w/AZT

IL-2 Chiron AIDS, increase in

Interleukin-2 CD4 cell counts (aldeslukin) Immune Globulin Cutter Biological Pediatric AIDS, in Intravenous (Berkeley, CA) combination w/AZT (human) IMREG-1 Imreg AIDS, Kaposi's

(New Orleans, LA) sarcoma, ARC, PGL

IMREG-2 Imreg AIDS, Kaposi's

(New Orleans, LA) sarcoma, ARC, PGL

Imuthiol Diethyl Merieux Institute AIDS, ARC

Dithio Carbamate Alpha-2 Schering Plough Kaposi's sarcoma Interferon w/AZT, AIDS

Methionine- TNI Pharmaceutical AIDS, ARC

Enkephalin (Chicago, IL)

MTP-PE Ciba-Geigy Corp. Kaposi's sarcoma

Muramyl-Tripeptide

Granulocyte Amgen AIDS, in combination Colon} ⁷ Stimulating w/AZT

Factor

Remune Immune Response Immunotherapeutic

Corp. rCD4 Genentech AIDS, ARC

Recombinant

Soluble Human CD4 rCD4-IgG AIDS, ARC hybrids

Recombinant Biogen AIDS, ARC Soluble Human CD4

Interferon Hoffman-La Roche Kaposi's sarcoma Alfa 2a AIDS, ARC,

in combination w/AZT

SK&F 106528 Smith Kline HIV infection Soluble T4 Thymopentin Immunobiology HIV infection

Research Institute

(Annandale, NJ)

Tumor Necrosis Genentech ARC, in combination Factor; TNF w/gamma Interferon

ANTI-INFECHVES

Drug Name Manufacturer Indication

Clindamycin Pharmacia Upjohn PCP

Primaquine

Fluconazole Pfizer Cryptococcal

meningitis, candidiasis

Pastille Squibb Corp. Prevention of

Nystatin Pastille oral candidiasis

Ornidyl Merrell Dow PCP

Eflornithine

Pentamidine LyphoMed PCP treatment Isethionate (IM & IV) (Rosemont, IL)

Trimethoprim Antibacterial Trimethoprim/sulfa Antibacterial

Piritrexim Burroughs Wellcome PCP treatment

Pentamidine Fisons Corporation PCP prophylaxis Isethionate for

Inhalation

Spiramycin Rhone-Poulenc Cryptosporidial diarrhea

Intraconazole- Janssen-Pharm. Histoplasmosis; R5121 1 cryptococcal meningitis Trimetrexate Wamer-Lambert PCP

Daunorubicin NeXstar, Sequus Kaposi's sarcoma

Recombinant Human Ortho Pharm. Corp. Severe anemia Erythropoietin assoc. with AZT therapy

Recombinant Human Serono AIDS-related Growth Hormone wasting, cachexia

Megestrol Acetate Bristol-Myers Squibb Treatment of anorexia assoc. W/AIDS Testosterone Alza, Smith Kline AIDS -related wasting

Total Enteral Norwich Eaton Diarrhea and

Nutrition Pharmaceuticals malabsorption

related to AIDS

"Therapeutically effective" means the amount of agent required to provide a meaningful patient benefit as understood by practitioners in the field of AIDS and HIV infection. In general, the goals of therapeutically effective treatment include suppression of viral load, restoration and preservation of immunologic function, improved quality of life, and reduction of HIV-related morbidity and mortality. "Patient" means a person infected with the HIV virus and suitable for therapy as understood by practitioners in the field of AIDS and HIV infection.

"Treatment," "therapy," "regimen," "HIV infection," "ARC," "AIDS" and related terms are used as understood by practitioners in the field of AIDS and HIV infection.

Methods of Synthesis

The compounds of the invention according to the various aspects can be made by various methods available in the art, including those of the following schemes in the specific examples which follow. The structure numbering and variable numbering shown in the synthetic schemes may be distinct from, and should not be confused with, the structure or variable numbering in the claims or the rest of the specification. The variables in the schemes are meant only to illustrate how to make some of the compounds of the invention.

Abbreviations used in the schemes generally follow conventions used in the art. Some specific chemical abbreviations used in the examples are defined as follows:

"DMF" for N,N-dimethylformamide; "MeOH" for methanol; "Ar" for aryl; "TFA" for trifluoroacetic acid; "BOC" for t-butoxycarbonate, "DMSO" for dimethylsulfoxide; "h" for hours; "rt" for room temperature or retention time (context will dictate); "min" for minutes; "EtOAc" for ethyl acetate; "THF" for tetrahydrofuran; "Et20" for diethyl ether; "DMAP" for 4-dimethylaminopyridine; "DCE" for 1,2-dichloroethane; "ACN" for acetonitrile; "DME" for 1,2-dimethoxyethane; "HATU" for (1-

[Bis(dimethylamino)methylene]-lH-l,2,3-triazolo[4,5-b]pyr idinium 3- oxid

hexafluorophosphate) "DIEA" for diisopropylethylamine.

Certain other abbreviations as used herein, are defined as follows: "1 x" for once, "2 x" for twice, "3 x" for thrice, "°C" for degrees Celsius, "eq" for equivalent or equivalents, "g" for gram or grams, "mg" for milligram or milligrams, "L" for liter or liters, "mL" for milliliter or milliliters, "μΕ" for microliter or microliters, "N" for normal, "M" for molar, "mmol" for millimole or millimoles, "min" for minute or minutes, "h" for hour or hours, "rt" for room temperature, "RT" for retention time, "atm" for atmosphere, "psi" for pounds per square inch, "cone." for concentrate, "sat" or "sat'd " for saturated, "MW" for molecular weight, "mp" for melting point, "ee" for enantiomeric excess, "MS" or "Mass Spec" for mass spectrometry, "ESI" for electrospray ionization mass spectroscopy, "HR" for high resolution, "HRMS" for high resolution mass spectrometry , "LCMS" for liquid chromatography mass spectrometry, "HPLC" for high pressure liquid chromatography, "RP HPLC" for reverse phase HPLC, "TLC" or "tic" for thin layer chromatography, "NMR" for nuclear magnetic resonance spectroscopy, "¾" for proton, "δ" for delta, "s" for singlet, "d" for doublet, "t" for triplet, "q" for quartet, "m" for multiplet, "br" for broad, "Hz" for hertz, and "α", "β", "R", "S", "E", and "Z" are stereochemical designations familiar to one skilled in the art.

EXAMPLES

The following examples illustrate typical syntheses of the compounds of Formula I, as described generally above. These examples are illustrative only and are not intended to limit the disclosure in any way. The reagents and starting materials are readily available to one of ordinary skill in the art.

Chemistry Typical Procedures and Characterization of Selected Examples:

Unless otherwise stated, solvents and reagents were used directly as obtained from commercial sources, and reactions were performed under a nitrogen atmosphere. Flash chromatography was conducted on Silica gel 60 (0.040-0.063 particle size; EM Science supply). ¾ NMR spectra were recorded on Bruker DRX-500f at 500 MHz (or Bruker AV 400 MHz, Bruker DPX-300B or Varian Gemini 300 at 300 MHz as stated). The chemical shifts were reported in ppm on the δ scale relative to 5TMS = 0. The following internal references were used for the residual protons in the following solvents: CDCb (δ _Η 7.26), CD ₃ OD (5H 3.30), Acetic-d4 (Acetic Acid d ₄ ) (δ _Η 11.6, 2.07), DMSO mix or DMSO-D6 CDCb ((H 2.50 and 8.25) (ratio 75%:25%), and DMSO-D6 (δ _Η 2.50).

Standard acronyms were employed to describe the multiplicity patterns: s (singlet), br. s (broad singlet), d (doublet), t (triplet), q (quartet), m (multiplet), b (broad), app (apparent). The coupling constant (J) is in Hertz. All Liquid Chromatography (LC) data were recorded on a Shimadzu LC-10AS liquid chromatograph using a SPD-10AV UV-Vis detector with Mass Spectrometry (MS) data determined using a Micromass Platform for LC in electrospray mode.

LCMS Methods: Method 1 :

Start %B = 0, Final % B = 100 over 2 minute gradient, hold 100% B for 2 minutes Flow Rate = 1 mL / min

Solvent A = 90% Water, 10% Methanol, 0.1% TFA

Solvent B = 10% Water, 90% Methanol, 0.1% TFA

Column = Phenomenex Luna 2.0 x 30 mm C18, 3um

Method 2:

Start %B = 0, Final % B = 100 over 2 minute gradient, hold 100% B for 1 minute Flow Rate = 1 mL / min

Solvent A = 90% Water, 10% Methanol, 0.1% TFA

Solvent B = 10% Water, 90% Methanol, 0.1% TFA

Column = Phenomenex Luna 2.0 x 30 mm CI 8, 3um Method 3:

Start %B = 0, Final % B = 100 over 2 minute gradient, hold 100% B for 4 minutes Flow Rate = 1 mL / min

Solvent A = 90% Water, 10% Methanol, 0.1% TFA

Solvent B = 10% Water, 90% Methanol, 0.1% TFA

Column = Phenomenex Luna 2.0 x 30 mm C18, 3um

Method 4:

Start %B = 0, Final % B = 100 over 4 minute gradient, hold 100% B for 1 minute Flow Rate = 1 mL / min

Solvent A = 90% Water, 10% Methanol, 0.1% TFA

Solvent B = 10% Water, 90% Methanol, 0.1% TFA

Column = Phenomenex Luna 2.0 x 30 mm C18, 3um

Method 5:

Start % B = 30, Final % B = 100 over 4 min gradient

Flow Rate = 0.8 ml/min

Wavelength = 220 nM

Solvent A = 90% Water, 10% Methanol, 0.1% TFA

Solvent B = 10% Water, 90% Methanol, 0.1% TFA

Column = Phenomenex Luna 2.0 X 50mm C18, 3um

Preparative Methods:

Method 1 :

Instrument: Thar SFC Prep 350

Preparative Column: IB (3 x25cm, 5μιη)

BPR pressure: 100 bars

Temperature: 30 °C

Flow rate: 160 mL/min

Mobile Phase: COi/ MeOtLTHF (3: 1) (75/25)

Detector Wavelength 240 nm Stack injection

1.5mL with cycle time 2 mins

24g in 680mL MeOH:THF (1 :2), 35.3mg/mL

Method 2:

Instrument: Thar SFC Prep 350

Preparative Column: IB (3 x25cm, 5μιη)

BPR pressure: 100 bars

Temperature: 30 °C

Flow rate: 160 mL/min

Mobile Phase: COi/ MeOH:THF (3: 1) (75/25)

Detector Wavelength: 240 nm

Separation Program: : Stack injection

Injection: 1.25mL with cycle time 1.5 mins

sample preparation : 18.2g in 500mL MeOH:THF (1 :2), 36.4mg/mL

Method 3:

Start % B = 30, Final % B = 100 over 12 min gradient, hold at 100% B for 4 min Flow Rate = 50 ml/min

Wavelength = 220

Solvent A = 90% Water, 10% acetonitrile, 0.1% TFA

Solvent B = 10% Water, 90% acetonitrile, 0.1% TFA

Column = Waters Sunfire C18, 5 μιη, 30 x 150 mm Method 4:

Isocratic 45% B elution until all material eluted (manual fraction collection) Flow Rate = 50 ml/min

Wavelength = 220

Solvent A = 90% Water, 10% acetonitrile, 0.1% TFA

Solvent B = 10% Water, 90% acetonitrile, 0.1% TFA

Column = Waters Sunfire C18, 5 μπι, 30 x 150 mm Preparation of Compounds

Preparation of (lS,3aS,5aR,5bR,7aS, l laS,l lbR,13aR,13bR)-l-isopropyl-9-(4- (methoxycarbonyl)phenyl)-5a,5b,8,8,l la-pentamethylicosahydro-lH- cyclopenta[a]chrysene-3a-carboxylic acid.

In a 2L Parr hydrogenation vessel were combined

(lR,3aS,5aR,5bR,7aR, l laS, l lbR, 13aR,13bR)-benzyl 9-(4-(methoxycarbonyl)phenyl)- 5a,5b,8,8, l l a-pentamethy 1- 1 -(prop- 1 -en-2-y 1) - 2,3,3a,4,5,5a,5b,6,7,7a,8, l l, l la,l lb,12, 13,13a, 13b-octadecahydro-lH- cyclopenta[a]chrysene-3a-carboxylate (14.187 g, 21.40 mmol) and 1,2-DCE (120 mL). Then EtOH (120 mL) was added and the mixture was stirred and flushed with nitrogen. To the mixture was added 10% palladium on carbon (6.83 g, 6.42 mmol) in three separate portions. The vessel was charged with hydrogen gas on the Parr apparatus to 60 PSI and was shaken at rt. The reaction was removed from the Parr shaker after 64 h, and the reaction vessel was charged with more 10% palladium on carbon (3.42 g, 3.21 mmol) and 1,2-DCE (100 mL), EtOH (100 mL) and 1,4-dioxane (50 mL) were added and the vessel was recharged to 60 PSI with hydrogen gas on the Parr apparatus and shaken at rt for an additional 42 h. The catalyst was removed via filtration through a sintered glass funnel and the filtrate was concentrated in vacuo. The residue was dried in a vacuum oven at 50 degrees C to give 12.47 g (quantitative yield) of a slightly yellow solid. This solid was a mixture of diastereomers (12% 9R isomer, 88% 9S isomer) formed during the hydrogenation. LCMS: m/z = 577.4 (M+H) ⁺ , 4.19 min (Method 3). Ή NMR (400 MHz, CHLOROFORM-d) δ ppm 7.90-7.97 (m, 2H), 7.29-7.32 (m, 0.25H), 7.25 (d, J=8.3 Hz, 1.75H), 3.92 (s, 3H), 2.81-2.88 (m, 0.12H), 2.42 (dd, J=13.2, 2.9 Hz, 0.88H), 2.22-2.34 (m, 3H), 2.11 (qd, J=13.4, 3.0 Hz, IH), 1.92 (dd, J=12.5, 7.3 Hz, IH), 1.78-1.88 (m, 2H), 1.69-1.76 (m, IH), 1.57-1.68 (m, 3H), 1.47-1.57 (m, 4H), 1.39-1.47 (m, 5H), 1.29-1.39 (m, 3H), 1.17-1.25 (m, 2H), 1.03-1.11 (m, IH), 1.02 (s, 3H), 1.00 (s, 3H), 0.98 (s, 3H), 0.94 (d, J=11.25 Hz, IH), 0.89 (d, J=7 Hz, 3H), 0.80 (d, J=6.75 Hz, 3H), 0.78 (s, 3H), 0.72 (s, 2.6H), 0.55 (s, 0.4H). Purification of (lS,3aS,5aR,5bR,7aS,9R,l laS,l lbR, 13aR, 13bR)-l-isopropyl-9-

(4-(methoxycarbonyl)phenyl)-5a,5b,8,8,l la-pentamethylicosahydro-lH- cyclo

A 12:88 (9R.9S) mixture of diastereomers of

(lS,3aS,5aR,5bR,7aS,l laS,l lbR,13aR,13bR)-l-isopropyl-9-(4- (methoxycarbonyl)phenyl)-5a,5b,8,8,l la-pentamethylicosahydro-lH- cyclopenta[a]chrysene-3a-carboxylic acid (31.7 mmol) was purified via supercritical fluid chromatography in two passes (Preparative Method 1 and Preparative Method 2). Thus was isolated a 4: 1 (9R.9S) mixture of diastereomers recovered as a white powder (2.0 g, 3.47 mmol, 10.9% yield). ¾ NMR (400 MHz, 1 : 1 mixture of CDC13 andMeOD, MeOD lock) δ ppm 7.90 (d, J=8.3 Hz, 2H), 7.30 (d, J=8.1 Hz, 1.6H), 7.26 (d, J=8.1 Hz, 0.4H), 3.90 (s, 3H), 2.84 (dd, J=9.4, 2.8 Hz, 0.8H), 2.54-2.60 (m, 0.2H), 2.17-2.49 (m, 4H), 1.75-2.02 (m, 4H), 1.68 (d, J=11.7 Hz, IH), 1.42-1.62 (m, 9H), 1.30-1.42 (m, 4H), 1.13- 1.30 (m, 6H), 1.08 (s, 3H), 0.91-1.05 (m, 9H), 0.86 (d, J=6.6 Hz, 3H), 0.77 (d, J=6.8 Hz, 3H), 0.70 (s, 0.6H), 0.53 (s, 2.4H). Example B 1

Preparation of (lS,3aS,5aR,5bR,7aS,9R,l laS,l lbR, 13aR, 13bR)-9-(4- carboxyphenyl)-l-isopropyl-5a,5b,8,8, l la-pentamethylicosahydro-lH- cyclopenta[a]chrysene-3a-carboxylic acid.

Solid (lS,3aS,5aR,5bR,7aS, l laS, l lbR,13aR,13bR)-l-isopropyl-9-(4- (methoxycarbonyl)phenyl)-5a,5b,8,8,l la-pentamethylicosahydro-lH- cyclopenta[a]chrysene-3a-carboxylic acid as a 4: 1 mixture of 9R:9S isomers (0.065 g, 0.113 mmol) was dissolved in tetrahydrofuran (0.90 mL) and MeOH (0.90 mL) and the resulting mixture was treated with lithium hydroxide hydrate (0.901 mL, 0.901 mmol). The mixture was heated to 75 degrees C with stirring for 30 min. The crude mixture was purified by reverse phase preparative HPLC to provide the desired title 9R compound as the major product. The material was a neutral white powder (32.4 mg, 50.6% yield). LCMS: m/z = 563.4 (M+H) ⁺ , 3.22 min (Method 1). ¾ NMR (400MHz, Acetic) δ ppm 11.64 (s, 2H), 8.07 - 7.95 (m, J=8.1 Hz, 2H), 7.45 - 7.35 (m, J=8.1 Hz, 2H), 2.93 (dd, J=10.4, 2.3 Hz, 1H), 2.44 - 2.26 (m, 3H), 2.22 (br. s., 1H), 1.99 - 1.85 (m, 3H), 1.83 (br. s., 1H), 1.75 (d, J=11.5 Hz, 2H), 1.68 - 1.41 (m, 12H), 1.40 - 1.29 (m, 2H), 1.24 (d, J=13.0 Hz, 2H), 1.15 (s, 3H), 1.08 (s, 3H), 1.04 (s, 3H), 1.03 (s, 3H), 0.92 (d, J=6.6 Hz, 3H), 0.84 (d, J=6.8 Hz, 3H), 0.60 (s, 3H).

Preparation of methyl 4-((lS,3aS,5aR,5bR,7aS,l laS,l lbR, 13aR, 13bR)-3a- isocyanato-l-isopropyl-5a,5b,8,8, l la-pentamethylicosahydro-lH-cyclopenta[a]chrysen- 9-yl)benzoate.

To a slurry of ( 1 S,3aS,5aR,5bR,7aS, 1 laS, 1 lbR, 13aR, 13bR)- 1 -isopropyl-9-(4- (methoxycarbonyl)phenyl)-5a,5b,8,8,l la-pentame1hylicosahydro-lH- cyclopenta[a]chrysene-3a-carboxylic acid (12% 9(R) isomer, 88% 9(S) isomer) in 1,4- dioxane (250 mL) was added triethylamine (5.37 mL, 38.5 mmol) followed by diphenyl phosphoryl azide (7.13 mL, 32.1 mmol). The resulting yellow/orange slurry was heated to 100 °C which became a clear, orange solution. After 4.25h the mixture was allowed to cool to rt and was concentrated in vacuo to a residue. The residue was taken up in chloroform (350 mL) and washed with water (2 x 200 mL) and then with a mixture of 1M NaOH (35 mL) and brine (50 mL). The hydroxide/brine wash was back-extracted with chloroform. The combined chloroform extracts were dried over MgS04, filtered and concentrated in vacuo until approximately 75 mL remained and a heavy precipitate of solid occured. The resulting slurry was chilled in an ice bath and filtered, and the isolated solid was washed with ice cold ethyl acetate and allowed to air dry. The isolated solid (labeled isolate 01) was dried in a vacuum oven at 50 degrees C to give 7.03 g (57.2% yield) as a white powder. This first isolate was highly enriched in the major 9(S) diastereomer and was set aside. The filtrate was concentrated in vacuo and the residue was purified by flash silica gel chromatography (220 g silica, elution gradient 100% hexanes to 20: 1 hexanes :EtOAc). Distereomers were not separated and the

chromatographed material (labeled isolate 02) was isolated as a 2.066 g of a white solid (16.8% yield). This second isolate was a mixture of isomers (40% 9(R) isomer, 60% 9(S) isomer). ¾ NMR (400 MHz, CHLOROFORM-d) δ ppm 7.95 (d, J=8.3 Hz, 0.8H), 7.94 (d, J=8.3 Hz, 1.2H), 7.30 (d, J=8.3 Hz, 0.8H), 7.26 (d, J=8.3 Hz, 1.2H), 3.92 (s, 3H), 2.85 (dd, J=9.7, 3.5 Hz, 0.4H), 2.42 (dd, J=13.3, 3.1 Hz, 0.6H), 2.05-2.18 (m, 0.6H), 1.76-1.94 (m, 8.4H), 1.66-1.73 (m, 1H), 1.38-1.59 (m, 10H), 1.15-1.37 (m, 6H), 1.10-1.13 (m, 4H), 0.99 (m, 6H), 0.91 (d, J=6.6 Hz, 4H), 0.76-0.81 (m, 5H), 0.73 (s, 1.8H), 0.55 (s, 1.2H).

Example B2

Preparation of 4-((lS,3aS,5aR,5bR,7aS,9R,l laS,l lbR, 13aR, 13bR)-3a-((2- (dimemylamino)ethyl)carbamoyl)-l-isopropyl-5a,5b,8,8,l la-pentamethylicosahydro-lH- cy

Step 1. Preparation of methyl 4-((lS,3aS,5aR,5bR,7aS, l laS, l lbR,13aR,13bR)- 3a-((2-(dimethylamino)ethyl)carbamoyl)- l-isopropyl-5a,5b,8, 8, 11a-

A 4: 1 (9R:9S) mixture of isomers of

(lS,3aS,5aR,5bR,7aS,l laS,l lbR,13aR,13bR)-l-isopropyl-9-(4- (methoxycarbonyl)phenyl)-5a,5b,8,8,l la-pentamethylicosahydro-lH- cyclopenta[a]chrysene-3a-carboxylic acid (0.025 g, 0.043 mmol) was combined with HATU (0.021 g, 0.056 mmol) in chloroform (1 mL). To the stirred mixture was added Nl,Nl-dimethylethane-l,2-diamine (0.0050 g, 0.056 mmol) followed by DIPEA (0.017 g, 0.130 mmol). The mixture was stirred for 3d and was then concentrated to a residue via nitrogen stream and was carried into the next step without purification. LCMS: m/z = 647.5 (M+H) ⁺ , 2.63 min (Method 2).

Step 2. Preparation of 4-((lS,3aS,5aR,5bR,7aS,9R,l laS, l lbR,13aR,13bR)-3a- ((2-(dimethylamino)ethyl)carbamoyl)-l-isopropyl-5a,5b,8,8,l la-pentamethylicosahydro- 1 H-cyclopenta[a] chry sen-9-y l)benzoic acid .

The residue from Step 1 was dissolved in a mixture of THF (0.3 mL) and MeOH (0.3 mL) and to the resulting solution was added 1.0M aqueous LiOH (0.34 mL, 0.34 mmol). The mixture was heated to 75 °C with stirring for 1.5h. Purification by reverse phase preparative HPLC gave the major 9(R) isomer title compound (0.018 g, 55% yield) at a white powder TFA salt. LCMS: m/z = 633.5 (M+H) ⁺ , 2.25 min (Method 1). ¾ NMR (400 MHz, 1 : 1 mixture of CDC13 andMeOD, MeOD lock) δ ppm 7.91 (d, J=8.3 Hz, 2H), 7.29 (d, J=8.3 Hz, 2H), 3.51 (t, J=5.1 Hz, 2H), 3.19 (t, J=5.9 Hz, 2H), 2.92 (s, 6H), 2.84 (dd, J=9.5, 3.2 Hz, 1H), 2.43-2.53 (m, 1H), 2.21-2.31 (m, 1H), 2.07 (d, J=13.4 Hz, 1H), 1.59-1.93 (m, 6H), 1.43-1.58 (m, 10H), 1.31-1.43 (m, 4H), 1.17-1.31 (m, J=8.8 Hz, 4H), 1.08 (s, 3H), 1.03 (s, 3H), 0.97 (s, 3H), 0.96 (s, 3H), 0.86 (d, J=6.8 Hz, 3H), 0.77 (d, J=6.6 Hz, 3H), 0.54 (s, 3H). Example B3

Preparation of 4-((lS,3aS,5aR,5bR,7aS,9R, l laS, l lbR,13aR,13bR)-3a-((3- (dimethylamino)propyl)carbamoyl)- l-isopropyl-5a,5b,8,8, 1 la-pentamethylicosahydro-

The title compound was prepared by the same procedure as described for the preparation of 4-((lS,3aS,5aR,5bR,7aS,9R,l laS,l lbR,13aR, 13bR)-3a-((2- (dimemylamino)ethyl)carbamoyl)-l-isopropyl-5a,5b,8,8,l la-pentamethylicosahydro-lH- cyclopenta[a]chrysen-9-yl)benzoic acid, except N 1 , N 1 -dimethylpropane- 1 ,3-diamine (0.0058 g, 0.056 mmol) was used instead of Nl,Nl-dimethylethane-l,2-diamine in Step 1. The product was isolated as a white solid TFA salt (0.0125 g, 38% yield). LCMS: m/z = 647.5 (M+H) ⁺ , 2.42 min (Method 1). ¹ H NMR (400 MHz, 1: 1 mixture of CDC13 and MeOD, MeOD lock) δ ppm 7.91 (d, J=8.3 Hz, 2H), 7.68 (t, J=5.4 Hz, IH), 7.29 (d, J=8.1 Hz, 2H), 3.20-3.30 (m, 2H), 3.01-3.11 (m, 2H), 2.88 (s, 6H), 2.84 (dd, J=9.5, 3.2 Hz, IH),

2.42- 2.54 (m, IH), 2.28 (t, J=10.3 Hz, IH), 2.08 (d, J=13.4 Hz, IH), 1.64-1.98 (m, 7H),

1.43- 1.61 (m, 9H), 1.32-1.42 (m, 5H), 1.15-1.32 (m, 5H), 1.08 (s, 3H), 1.04 (s, 3H), 0.97 (s, 3H), 0.96 (br. s., 3H), 0.86 (d, J=6.8 Hz, 3H), 0.77 (d, J=6.6 Hz, 3H), 0.54 (s, 3H). Example B4

Preparation of 4-((lS,3aS,5aR,5bR,7aS,9R,l laS,l lbR, 13aR, 13bR)-3a-amino-l- isopropyl-5a,5b,8,8, 1 la-pentamethylicosahydro- lH-cyclopenta[a]chrysen-9-yl)benzoic acid.

Step 1. Preparation of methyl 4- ((lS,3aS,5aR,5bR,7aS,9R,l laS, l lbR, 13aR,13bR)-3a-amino-l-isopropyl-5a,5b,8,8,l la- pentamethylicosahydro-

A 2:3 (9R:9S) mixture of isomers of methyl 4- ((lS,3aS,5aR,5bR,7aS,l laS,l lbR, 13aR, 13bR)-3a-isocyanato-l-isopropyl-5a,5b,8,8,l la- pentamethylicosahydro-lH-cyclopenta[a]chrysen-9-yl)benzoate (0.100 g, 0.174 mmol) was dissolved in 1,4-dioxane (1.5 mL) and the resulting solution was treated slowly with 12M HCl (0.145 mL, 1.73 mmol). The mixture was stirred at rt for 66 h and was then concentrated in vacuo to a white solid which was purified by reverse phase preparative HPLC to provide separation of the individual isomer compounds.

Isomer 1 : methyl 4-((lS,3aS,5aR,5bR,7aS,9R,l laS,l lbR, 13aR, 13bR)-3a-amino- l-isopropyl-5a,5b,8,8, 1 la-pentamethylicosahydro-lH-cyclopenta[a]chrysen-9- yl)benzoate. This isomer was the first to elute from the preparative HPLC. 37.9 mg white powder isolated as TFA salt (33.8% yield). LCMS: m/z = 548.4 (M+H) ⁺ , 4.27 min (Method 4). ¾ NMR (400 MHz, 1 : 1 mixture of CDC13 and MeOD, MeOD lock) δ ppm 7.91 (d, J=8.3 Hz, 2H), 7.30 (d, J=8.3 Hz, 2H), 3.90 (s, 3H), 2.85 (dd, J=9.5, 3.2 Hz, 1H), 1.97-2.04 (m, 1H), 1.82-1.96 (m, 4H), 1.62-1.82 (m, 8H), 1.53-1.61 (m, 3H), 1.39-1.53 (m, 8H), 1.22-1.37 (m, 4H), 1.13 (s, 3H), 1.11 (s, 3H), 1.06 (s, 3H), 0.97 (s, 3H), 0.92 (d, J=6.8 Hz, 3H), 0.83 (d, J=6.8 Hz, 3H), 0.55 (s, 3H).

Isomer 2: methyl 4-((lS,3aS,5aR,5bR,7aS,9S,l laS, l lbR,13aR,13bR)-3a-amino- l-isopropyl-5a,5b,8,8, l la-pentamethylicosahydro-lH-cyclopenta[a]chrysen-9- yl)benzoate. This isomer was the second to elute from the preparative HPLC. 42.8 mg white powder isolated as TFA salt (38.1% yield). LCMS: m/z = 548.4 (M+H) ⁺ , 4.27 min (Method 4). ¾ NMR (400 MHz, 1 : 1 mixture of CDC13 and MeOD, MeOD lock) δ ppm 7.90 (d, J=8.3 Hz, 2H), 7.26 (d, J=8.3 Hz, 2H), 3.90 (s, 3H), 2.44 (dd, J=13.1, 3.1 Hz, 1H), 2.13 (qd, J=13.3, 3.3 Hz, 1H), 1.97-2.05 (m, 1H), 1.80-1.95 (m, 4H), 1.72-1.79 (m, 2H), 1.64-1.72 (m, 4H), 1.54-1.64 (m, 4H), 1.45 (d, J=13.7 Hz, 7H), 1.23-1.36 (m, 3H), 1.13 (s, 3H), 1.05 (s, 4H), 1.00 (s, 3H), 0.96 (d, J=11.5 Hz, 1H), 0.91 (d, J=6.8 Hz, 3H), 0.82 (d, J=6.6 Hz, 3H), 0.77 (s, 3H), 0.72 (s, 3H).

Step 2. Preparation of 4-((lS,3aS,5aR,5bR,7aS,9R, l laS, l lbR,13aR,13bR)-3a-amino-l- isopropyl-5a,5b,8,8, 1 la-pentamethylicosahydro- lH-cyclopenta[a]chrysen-9-yl)benzoic acid.

Methyl 4-((lS,3aS,5aR,5bR,7aS,9R, l laS,l lbR, 13aR, 13bR)-3a-amino-l- isopropyl-5a,5b,8,8, 1 la-pentamethylicosahydro- lH-cyclopenta[a]chrysen-9-yl)benzoate TFA salt (0.031 g, 0.047 mmol) was combined with THF (0.3 mL), MeOH (0.3 mL) and 1M aqueous LiOH (0.23 mL, 0.23 mmol) and the resulting mixture was heated to 70 degrees C for 45 min. Purification by reverse phase preparative HPLC gave the title compound as a white powder: 0.0207 g (67.5% yield) as the TFA salt. LCMS: m/z = 534.4 (M+H) ⁺ , 2.32 min (Method 2). ¾ NMR (400 MHz, 1 : 1 mixture of CDC13 and MeOD, MeOD lock) δ ppm 7.92 (d, J=8.3 Hz, 2H), 7.29 (d, J=8.3 Hz, 2H), 2.85 (dd, J=10.3, 2.7 Hz, 1H), 1.97-2.05 (m, 1H), 1.62-1.95 (m, 12H), 1.53-1.61 (m, 3H), 1.40-1.53 (m, 8H), 1.29-1.37 (m, 2H), 1.22-1.28 (m, 2H), 1.13 (s, 3H), 1.12 (s, 3H), 1.07 (s, 3H), 0.98 (s, 3H), 0.92 (d, J=6.8 Hz, 3H), 0.83 (d, J=6.6 Hz, 3H), 0.55 (s, 3H).

Example B5

Preparation of 4-((lS,3aS,5aR,5bR,7aS,9R,l laS,l lbR, 13aR, 13bR)-3a-(3-(2- (dimemylamino)ethyl)ureido)-l-isopropyl-5a,5b,8,8,l la-pentamethylicosahydro-lH-

Step 1: Preparation of methyl 4-((lS,3aS,5aR,5bR,7aS,l laS,l lbR,13aR,13bR)-3a-(3-(2-

(dimethylamino)ethyl)ureido)-l-isopropyl-5a,5b,8,8,lla-pe ntamethylicosahydro-lH- cyclopenta[a]chrysen-9-yl

Under nitrogen atmosphere were combined the diastereomeric mixture methyl 4- ((lS,3aS,5aR,5bR,7aS,l laS,l lbR,13aR,13bR)-3a-isocyanato-l-isopropyl-5a,5b,8, 8,1 la- pentamethylicosahydro- lH-cyclopenta[a]chrysen-9-yl)benzoate (0.060 g, 0.105 mmol) with Nl,Nl-dimethylethane-l,2-diamine (0.023 ml, 0.209 mmol) in and anhydrous THF (1 mL). The mixture was stirred 1 h at rt and was then carried directly into the next step without purification. LCMS: in z = 662.6 (M+H) ⁺ , 2.63 min (Method 1).

Step 2: Preparation of 4-((lS,3aS,5aR,5bR,7aS,9R,llaS,llbR,13aR,13bR)-3a-(3-(2- (dimemylamino)ethyl)ureido)-l-isopropyl-5a,5b,8,8,lla-pentam ethylicosahydro-lH- cyclopenta[a]chrys

Example B5

The crude mixture from Step 2 containing the diastereomeric mixture methyl 4- ((lS,3aS,5aR,5bR,7aS,llaS,llbR,13aR,13bR)-3a-(3-(2-(dimethyl amino)ethyl)ureido)-l- isopropyl-5a,5b,8, 8, 1 la-pentamethylicosahydro- lH-cyclopenta[a]chrysen-9-yl)benzoate (0.070 g, 0.105 mmol) was diluted with MeOH (1 mL) and treated with 1M aqueous LiOH (0.84 mL, 0.840 mmol). The resulting mixture was heated to 75 degrees C for 20 min with stirring. Purification of the crude mixture by reverse phase preparative HPLC provided separation of the diastereomeric title compounds.

This isomer was the first to elute from the preparative HPLC. 22.8 mg white powder isolated as TFA salt (27.6% yield). LCMS: m/z = 648.5 (M+H) ⁺ , 2.42 min

(Method 1). ¾ NMR (400 MHz, 1 : 1 mixture of CDC13 and MeOD, MeOD lock) δ ppm 7.91 (d, J=8.1 Hz, 2H), 7.29 (d, J=8.3 Hz, 2H), 3.37-3.53 (m, 2H), 3.15-3.23 (m, 2H), 2.91 (s, 6H), 2.84 (dd, J=9.0, 3.2 Hz, IH), 2.55 (d, J=13.4 Hz, IH), 2.24 (dd, J=12.3, 7.0 Hz, IH), 1.72-1.93 (m, 5H), 1.60-1.69 (m, 2H), 1.37-1.60 (m, 13H), 1.19-1.37 (m, 4H), 1.09 (s, 3H), 1.06 (s, 4H), 1.02 (s, 4H), 0.97 (s, 3H), 0.88 (d, J=6.8 Hz, 3H), 0.79 (d, J=6.6 Hz, 3H), 0.54 (s, 3H).

Example B6

Preparation of 4-((lS,3aS,5aR,5bR,7aS,9R,l laS,l lbR, 13aR, 13bR)-3a-(3-(3- (dimethylamino)propyl)ureido)-l-isopropyl-5a,5b,8,8,l la-pentamethylicosahyd] cyclopenta[a]chry

The title compound was prepared by the same procedure as described for the preparation of 4-((lS,3aS,5aR,5bR,7aS,9R,l laS,l lbR, 13aR, 13bR)-3a-(((2- (dimethylamino)ethoxy)carbonyl)amino)-l-isopropyl-5a,5b,8,8, l la- pentamethylicosahydro-lH-cyclopenta[a]chrysen-9-yl)benzoic acid, except that ΝΙ,ΝΙ- dimethylpropane-l,3-diamine (0.026 ml, 0.209 mmol) was used instead of ΝΙ,ΝΙ- dimethylethane-l,2-diamine (0.023 ml, 0.209 mmol). Purification of the crude diastereomeric mixture by reverse phase preparative HPLC provided separation of the title compound. This isomer was the first to elute from the preparative HPLC. 23.4 mg white powder isolated as TFA salt (28.4% yield). LCMS: m/z = 662.5 (M+H) ⁺ , 2.41 min (Method 1). ¾ NMR (400 MHz, 1 : 1 mixture of CDC13 and MeOD, MeOD lock) δ ppm 7.91 (d, J=8.3 Hz, 2H), 7.29 (d, J=8.3 Hz, 2H), 3.20-3.29 (m, 2H), 3.07 (t, J=6.7 Hz, 2H), 2.81-2.90 (m, 7H), 2.55 (d, J=13.2 Hz, 1H), 2.21 (dd, J=12.2, 6.6 Hz, 1H), 1.72-1.94 (m, 7H), 1.53-1.69 (m, 5H), 1.36-1.53 (m, 10H), 1.21-1.36 (m, 3H), 1.09 (s, 4H), 1.07 (s, 4H), 1.03 (s, 3H), 0.97 (s, 3H), 0.89 (d, J=6.6 Hz, 3H), 0.80 (d, J=6.6 Hz, 3H), 0.55 (s, 3H).

Example B7

Preparation of 4-((lS,3aS,5aR,5bR,7aS,9R,l laS, l lbR,13aR,13bR)-3a-(((2-

(dimethylamino)ethoxy)carbonyl)amino)-l-isopropyl-5a,5b,8 ,8, l la- pentamethylicosahydro- lH-cyclopenta[a]chrysen-9-yl)benzoic acid.

Step 1 : Preparation of methyl 4-((lS,3aS,5aR,5bR,7aS, l laS,l lbR,13aR,13bR)- 3a-amino-l-isopropyl-5a,5b,8,8, l la-pentamethylicosahydro-lH-cyclopenta[a]chrysen-9- yl)benzoate hydrochlorid

A 2:3 mixture of isomers of methyl 4- ((lS,3aS,5aR,5bR,7aS,l laS,l lbR, 13aR, 13bR)-3a-isocyanato-l-isopropyl-5a,5b,8,8,l la- pentamethylicosahydro-lH-cyclopenta[a]chrysen-9-yl)benzoate (0.85 g, 1.48 mmol) was dissolved in 1,4-dioxane (20 mL) and the resulting solution was treated slowly with 6M HC1 (4.94 mL, 29.6 mmol). The mixture was stirred at rt for 66 h and was then concentrated in vacuo to afford the desired hydrochloride salt product mixture of isomers as a white solid: 0.866 g (quantitative). LCMS: m/z = 548.5 (M+H) ⁺ , 2.47 min (Method 1).

Step 2: Preparation of methyl 4-((lS,3aS,5aR,5bR,7aS, l laS,l lbR,13aR,13bR)-l- isopropyl-5a,5b,8,8, l la-pentamethyl-3a-(((pyridin-2-yloxy)carbonyl)amino)icosahyd ro- 1 H-cyclopenta[a] chry sen-9-y l)benzoate .

To a solution of the product from Step 1 (0.060 g; 0.103 mmol) in THF (1 mL) was added di(pyridin-2-yl) carbonate (0.024 g, 0.113 mmol), followed by addition of solid K2CO3 (0.028 g, 0.205 mmol) and DIPEA (0.027 g, 0.205 mmol). The resulting mixture was heated to 70 °C. After 2h, additional di(pyridin-2-yl) carbonate (0.024 g, 0.113 mmol) was added and heating to 70 °C was resumed for an additional 10 min. The crude mixture of isomers was carried directly into the next step.

Step 3: Preparation of 4-((lS,3aS,5aR,5bR,7aS,9R,l laS, l lbR,13aR,13bR)-3a- (((2-(dimethylamino)ethoxy)carbonyl)amino)- l-isopropyl-5a,5b,8,8, 11a- pentamethylicos

To a suspension of sodium hydride, 60% dispersion in oil (0.033 g, 0.824 mmol) in THF (1 mL) was slowly added 2-(dimethylamino)ethanol (0.073 g; 0.824 mmol).

Vigorous bubbling immediately began upon addition and a slight exotherm resulted. The mixture was stirred at rt for 30 min and was then added all at once to the crude mixture from Step 2. The mixture was stirred for 90 min at rt. The methyl ester was hydrolized during the course of the reaction to provide product as the carboxylic acid. Purification by reverse phase preparative HPLC provided separation of the title compound.

This isomer was the first to elute from the preparative HPLC. 11.0 mg white powder isolated as TFA salt (13.9 % yield). LCMS: m/z = 649.6 (M+H) ⁺ , 2.47 min (Method 2). ¾ NMR (400 MHz, 1 : 1 mixture of CDC13 and MeOD, MeOD lock) δ ppm 7.91 (d, J=8.1 Hz, 2H), 7.29 (d, J=8.1 Hz, 2H), 5.84 (s, 1H), 4.32 (tdd, J=18.2, 13.3, 4.9 Hz, 2H), 3.38 (t, J=4.8 Hz, 2H), 2.93 (s, 6H), 2.84 (dd, J=9.0, 3.2 Hz, 1H), 2.51 (d, J=12.7 Hz, 1H), 2.20 (dd, J=12.6, 6.7 Hz, 1H), 1.73-1.97 (m, 5H), 1.60-1.72 (m, 2H), 1.35-1.60 (m, 13H), 1.21-1.35 (m, 4H), 1.07-1.13 (m, 4H), 1.05 (s, 3H), 1.03 (s, 3H), 0.97 (s, 3H), 0.88 (d, J=6.6 Hz, 3H), 0.80 (d, J=6.6 Hz, 3H), 0.54 (s, 3H). Example B8

Preparation of 4-((lS,3aS,5aR,5bR,7aS,9R,l laS, l lbR,13aR,13bR)-3a-(((3- (dimethylamino)propoxy)carbonyl)amino)- l-isopropyl-5a,5b,8,8, 11a- pentamethylicosahydro- lH-cyclopenta[a]chrysen-9-yl)benzoic acid.

The title compound was prepared by a similar procedure as described for the preparation of 4-((lS,3aS,5aR,5bR,7aS,9R,l laS,l lbR, 13aR, 13bR)-3a-(((2- (dimethylamino)ethoxy)carbonyl)amino)-l-isopropyl-5a,5b,8,8, l la- pentamethylicosahydro-lH-cyclopenta[a]chrysen-9-yl)benzoic acid, except that 3- (dimethylamino)propan-l-ol (0.085 g, 0.824 mmol) was used instead of 2- (dimethylamino)ethanol in Step 3. Purification of the crude diastereomeric mixture by reverse phase preparative HPLC provided separation of the title compound.

This isomer was the first to elute from the preparative HPLC. 19.7 mg white powder isolated as TFA salt (24.4% yield). LCMS: m/z = 663.6 (M+H) ⁺ , 2.49 min (Method 2). ¾ NMR (400 MHz, 1 : 1 mixture of CDC13 and MeOD, MeOD lock) δ ppm 7.91 (d, J=8.1 Hz, 2H), 7.29 (d, J=8.3 Hz, 2H), 5.55 (s, IH), 4.10 (br. s., 2H), 3.13-3.23 (m, 2H), 2.89 (s, 6H), 2.84 (dd, J=9.4, 2.8 Hz, IH), 2.51 (d, J=12.5 Hz, IH), 2.21 (dd, J=11.6, 7.0 Hz, IH), 2.05 (dt, J=12.9, 6.4 Hz, 2H), 1.71-1.95 (m, 5H), 1.67 (d, J=12.7 Hz, IH), 1.35-1.63 (m, 14H), 1.18-1.35 (m, 3H), 1.09 (s, 4H), 1.06 (s, 4H), 1.03 (s, 3H), 0.97 (s, 3H), 0.89 (d, J=6.8 Hz, 3H), 0.80 (d, J=6.6 Hz, 3H), 0.55 (s, 3H).

Example B9

Preparation of 4-((lS,3aS,5aR,5bR,7aS,9R,l laS,l lbR, 13aR, 13bR)-3a-(2- (dimethylamino)acetamido)-l-isopropyl-5a,5b,8,8,l la-pentamethylicosahydro-lH- cyclopenta[a]chrysen-9-yl)benzoic acid.

Step 1 : Preparation of methyl 4-((lS,3aS,5aR,5bR,7aS,l laS, l lbR,13aR,13bR)-3a- amino- l-isopropyl-5a,5b,8,8, 1 la-pentamethylicosahydro- lH-cyclopenta[a]chrysen-9- yl)benzoate.

In a 20 mL scintillation vial were combined the diastereomeric mixture methyl 4- ((lS,3aS,5aR,5bR,7aS,l laS,l lbR, 13aR, 13bR)-3a-isocyanato-l-isopropyl-5a,5b,8,8,l la- pentamethylicosahydro-lH-cyclopenta[a]chrysen-9-yl)benzoate (0.75 g, 1.307 mmol) with 1,4-dioxane (10 mL). Then, HYDROCHLORIC ACID, 6M (2.178 mL, 13.07 mmol) was slowly added and the mixture was stirred at rt for 3d. The mixture was partly concentrated under nitrogen stream and to the residue was added ethyl acetate (150 mL). This mixture was slowly treated with saturated aqueous sodium bicarbonate (50 mL) and the resulting mixture was shaken carefully and phases were separated. The organic phase was dried over anhydrous magnesium sulfate, filtered and concentrated in vacuo to a white solid. Purification by flash silica gel chromatography (80g silica, elution gradient 100% DCM to 20: 1 DCM:MeOH) gave the desired product as a white solid: 0.653 g (91% yield). This material was a diastereomeric mixture. LCMS: m/z = 548.4 (M+H) ⁺ , 2.46 min (Method 2). ¾ NMR (400 MHz, CHLOROFORM-d) δ ppm 7.95 (d, J=8.2 Hz, 0.8H), 7.94 (d, J=8.2 Hz, 1.2H), 7.30 (d, J=8.6 Hz, 0.8H), 7.25 (d, J=8.1 Hz, 1.2H), 5.32 (s, 1H), 3.92 (s, 3H), 2.85 (dd, J=9.8, 3.2 Hz, 0.4H), 2.60 (d, J=13.2 Hz, 0.4H), 2.42 (dd, J=13.3, 2.8 Hz, 0.6H), 2.27 (dd, J=11.2, 7.6 Hz, 0.4H), 2.11 (qd, J=13.3, 3.3 Hz, 0.6H), 1.65-1.99 (m, 7.6H), 1.57-1.64 (m, 2H), 1.43-1.57 (m, 8H), 1.40 (br. s., 4H), 1.19-1.35 (m, 3H), 1.10 (s, 5H), 1.05 (s, 2H), 0.98 (d, J=2.7 Hz, 7H), 0.86-0.94 (m, 4H), 0.78 (s, 5H), 0.72 (s, 1.8H), 0.53-0.58 (m, 1.2H).

Step 2: Preparation of methyl 4-((lS,3aS,5aR,5bR,7aS,l laS, l lbR,13aR,13bR)-3a-(2- (dimethylamino)acetamido)-l-isopropyl-5a,5b,8,8,l la-pentamethylicosahydro-lH- cyclopenta[a]chrysen-9-yl)benzoate.

In a 1 dram vial were combined methyl 4- ((lS,3aS,5aR,5bR,7aS,l laS,l lbR, 13aR, 13bR)-3a-amino-l-isopropyl-5a,5b,8,8, l la- pentamethylicosahydro-lH-cyclopenta[a]chrysen-9-yl)benzoate (0.060 g, 0.110 mmol) with HATU (0.054 g, 0.142 mmol) and 2-(dimethylamino)acetic acid hydrochloride (0.020 g, 0.142 mmol) in chloroform (1 mL). To the stirred mixture was added DIPEA (0.077 mL, 0.438 mmol). The mixture was stirred at rt for 3d. The mixture was concentrated via nitrogen stream and carried directly into the next step without purification. LCMS: in z = 633.5 (M+H) ⁺ , 2.60 min (Method 2).

Step 3: Preparation of 4-((lS,3aS,5aR,5bR,7aS,9R,l laS,l lbR,13aR,13bR)-3a-(2- (dimethylamino)acetamido)-l-isopropyl-5a,5b,8,8,l la-pentamethylicosahydro-lH- cyclopenta[a]chrysen-9-yl)benzoic acid.

The crude diastereomeric mixture methyl 4- ((lS,3aS,5aR,5bR,7aS, l laS, l lbR,13aR,13bR)-3a-(2-(dimethylamino)acetamido)-l- isopropyl-5a,5b,8,8, 1 la-pentamethylicosahydro-lH-cyclopenta[a]chrysen-9-yl)benzoa te from Step 2 was combined with THF (1 mL), methanol (1 mL) and 1.0M aqueous LiOH (0.88 mmol, 0.88 mL). The mixture was heated to 75 degrees C for 2h, then was treated with additional 1.0M aqueous LiOH (0.88 mmol, 0.88 mL) and heated to 80 degrees C for an additional 90 min. The mixture was concentrated via nitrogen stream to a residue. Ethyl actetate (10 mL) and water (3 mL) were added and the mixture was shaken and phases were separated. The aqueous was extracted twice more with ethyl acetate (2 x 5 mL), the organic extracts were combined , concentrated in vacuo, and redissolved in THF to make prep HPLC samples. Purification of the crude diastereomeric mixture by reverse phase preparative HPLC provided separation of the title compound.

This isomer was the first to elute from the preparative HPLC. 13.2 mg white powder isolated as TFA salt (15.9% yield). LCMS: m/z = 619.5 (M+H) ⁺ , 2.44 min (Method 1). ¾ NMR (400 MHz, 1 : 1 mixture of CDC13 and MeOD, MeOD lock) δ ppm 7.92 (d, J=8.1 Hz, 2H), 7.36 (s, IH), 7.29 (d, J=8.3 Hz, 2H), 3.80-3.93 (m, 2H), 2.90 (s, 6H), 2.84 (dd, J=3.2 Hz, IH), 2.68 (d, J=13.4 Hz, IH), 2.28 (d, J=12.5 Hz, IH), 1.84-1.99 (m, 4H), 1.79 (br. s., IH), 1.69 (d, J=l 1.5 Hz, IH), 1.36-1.61 (m, 14H), 1.21-1.35 (m, 4H), 1.13 (br. s., IH), 1.10 (s, 3H), 1.07 (s, 3H), 1.03 (s, 3H), 0.97 (s, 3H), 0.89 (d, J=6.6 Hz, 3H), 0.80 (d, J=6.4 Hz, 3H), 0.55 (s, 3H).

Example BIO

Preparation of 4-((lS,3aS,5aR,5bR,7aS,9R,l laS,l lbR, 13aR, 13bR)-3a-(3- (dimemylamino)propanamido)-l-isopropyl-5a,5b,8,8, l la-pentame1hylicosahydro-lH- cyclopenta[a]chrysen-9-yl)benzoic acid.

The title compound was prepared by the same procedure as described in the preparation of 4-(( 1 S,3aS,5aR,5bR,7aS,9R, 1 laS, 1 lbR, 13aR, 13bR)-3a-(2- (dimethylamino)acetamido)-l-isopropyl-5a,5b,8,8,l la-pentamethylicosahydro-lH- cyclopenta[a]chrysen-9-yl)benzoic acid, except 3-(dimethylamino)propanoic acid hydrochloride (0.022 g, 0.142 mmol) was used in place of 2-(dimethylamino)acetic acid hydrochloride in Step 2. Also, in Step 3, the crude product was not extracted from the reaction mixture but rather the reaction mixture was purified directly by reverse phase preparative HPLC to provide separation of the title compound.

This isomer was the first to elute from the preparative HPLC. 18.3 mg white powder isolated as TFA salt (21.6% yield). LCMS: m/z = 633.5 (M+H) ⁺ , 2.45 min (Method 1). ¾ NMR (400 MHz, 1 : 1 mixture of CDC13 and MeOD, MeOD lock) δ ppm 7.92 (d, J=8.1 Hz, 2H), 7.30 (d, J=8.1 Hz, 2H), 7.01 (s, IH), 2.87 (s, 6H), 2.82-2.86 (m, IH), 2.69-2.78 (m, 2H), 2.61-2.69 (m, IH), 2.27 (dd, J=12.2, 5.1 Hz, IH), 1.83-2.00 (m, 4H), 1.73-1.83 (m, IH), 1.69 (d, J=10.8 Hz, IH), 1.44-1.64 (m, 12H), 1.35-1.43 (m, 3H), 1.20-1.35 (m, 3H), 1.10 (s, 4H), 1.07 (s, 4H), 1.03 (s, 3H), 0.97 (s, 3H), 0.89 (d, J=6.6 Hz, 3H), 0.80 (d, J=6.6 Hz, 3H), 0.55 (s, 3H).

Example B 11

Preparation of 4-((lS,3aS,5aR,5bR,7aS,9R,l laS,l lbR, 13aR, 13bR)-3a-(4 (dimethy lamino)butanamido) - 1 -isopropyl-5 a, 5b, 8 , 8 , 11 a-pentamethylicosahy dro- cyclopenta[a]chrysen-9-yl)benzoic acid.

The title compound was prepared by the same procedure as described in the preparation of 4-((lS,3aS,5aR,5bR,7aS,9R,l laS,l lbR, 13aR, 13bR)-3a-(2- (dimethylamino)acetamido)-l-isopropyl-5a,5b,8,8,l la-pentamethylicosahydro-lH- cyclopenta[a]chrysen-9-yl)benzoic acid, except 3-(dimethylamino)butanoic acid hydrochloride (0.024 g, 0.142 mmol) was used in place of 2-(dimethylamino)acetic acid hydrochloride in Step 2. Also, in Step 3, the crude product was not extracted from the reaction mixture but rather the reaction mixture was purified directly by reverse phase preparative HPLC to provide separation of the title compound.

This isomer was the first to elute from the preparative HPLC. 18.9 mg white powder isolated as TFA salt (21.9% yield). LCMS: m/z = 647.5 (M+H) ⁺ , 2.45 min

(Method 1). ¾ NMR (400 MHz, 1 : 1 mixture of CDC13 and MeOD, MeOD lock) δ ppm 7.92 (d, J=8.3 Hz, 2H), 7.30 (d, J=8.3 Hz, 2H), 3.13 (t, J=7.1 Hz, 2H), 2.88 (s, 6H), 2.84 (dd, J=8.8, 3.2 Hz, IH), 2.66 (d, J=13.4 Hz, IH), 2.45 (t, J=6.6 Hz, 2H), 2.27 (d, J=11.5 Hz, IH), 1.82-2.00 (m, 6H), 1.73-1.82 (m, IH), 1.65-1.72 (m, IH), 1.39-1.62 (m, 13H), 1.20-1.39 (m, 5H), 1.10 (s, 4H), 1.06 (s, 4H), 1.03 (s, 3H), 0.97 (s, 3H), 0.89 (d, J=6.6 Hz, 3H), 0.80 (d, J=6.6 Hz, 3H), 0.55 (s, 3H). Example B12

Preparation of 4-(( 1 S,3aS,5aR,5bR,7aS,9R, 1 laS, 1 IbR, 13aR, 13bR)-3a-((2-(( 1 S,4S)-2,2- dioxido-2-thia-5-azabicyclo[2.2. l]heptan-5-yl)ethyl)amino)- l-isopropyl-5a,5b,8,8, 1 la- pentamethylicosahydro- lH-cyclopenta[a]chrysen-9-yl)benzoic acid.

Step 1 : Preparation of methyl 4-((lS,3aS,5aR,5bR,7aS,l laS, l lbR,13aR,13bR)-3a-((2- (( 1 S,4S)-2,2-dioxido-2-thia-5 -azabicyclo [2.2.1 ]heptan-5 -yl)ethyl)amino)- 1 -isopropyl- 5a,5b,8,8, l l a-pentamethylicosahydro- 1 H-cy clopenta[a] chry sen-9-yl)benzoate .

A 2:3 (9R:9S) isomeric mixture of ethyl 4- ((lS,3aS,5aR,5bR,7aS,l laS,l lbR, 13aR, 13bR)-3a-amino-l-isopropyl-5a,5b,8,8, l la- pentamethylicosahydro-lH-cyclopenta[a]chrysen-9-yl)benzoate HC1 (0.350 g, 0.599 mmol), potassium iodide (0.212 g, 1.278 mmol), phosphoric acid potassium salt (0.542 g, 2.560 mmol), and (lS,4S)-5-(2-chloroethyl)-2-thia-5-azabicyclo[2.2. l]heptane 2,2- dioxide, HC1 (0.315 g, 1.278 mmol) were combined in a 15 mL medium pressure tube and dried in a vacuum oven for 15 min and then flushed with N ₂ (g). The solid mixture was charged with acetonitrile (6 mL) and the resulting suspension was heated to 120 °C. After 5h, the reaction was allowed to cool to rt and was subsequently treated with H2O (25 mL) and extracted with 3 x 50 mL DCM. The combined organic layer was washed with brine, dried over MgS04, filtered and concentrated to brown solid. The crude material was purified by flash column chromatochromatography (40g S1O2, step elution 1 : 1 hex:EtOAc then 95:5 DCM:MeOH) and dried in vacuo to give methyl 4- ((lS,3aS,5aR,5bR,7aS,l laS,l lbR, 13aR, 13bR)-3a-((2-((lS,4S)-2,2-dioxido-2-thia-5- azabicyclo[2.2. l]heptan-5-yl)ethyl)amino)-l-isopropyl-5a,5b,8, 8, 11a- pentamethylicosahydro-lH-cyclopenta[a]chrysen-9-yl)benzoate (0.270 g, 0.374 mmol, 58.6 % yield) as a brown solid isomeric mixture. LCMS: m/z = 721.6 (M+H ⁺ ), retention time 4.34 min (Method 5). Step 2. Preparation of 4-((lS,3aS,5aR,5bR,7aS,9R, l laS, l lbR,13aR,13bR)-3a-((2- (( 1 S,4S)-2,2-dioxido-2-thia-5 -azabicyclo [2.2.1 ]heptan-5 -yl)ethyl)amino)- 1 -isopropyl- 5a,5b,8,8,l l a-pentamethylicosahy dro- 1 H-cy clopenta[a] chry sen-9-y l)benzoic acid .

To a solution of the isomeric product from Step 1 methyl 4-

((lS,3aS,5aR,5bR,7aS,l laS,l lbR, 13aR, 13bR)-3a-((2-((lS,4S)-2,2-dioxido-2-thia-5- azabicyclo[2.2. l]heptan-5-yl)ethyl)amino)-l-isopropyl-5a,5b,8,8, 1 la- pentamethylicosahydro-lH-cyclopenta[a]chrysen-9-yl)benzoate (0.270 mg, 0.734 mmol) in THF (2 mL) and MeOH (1 mL) was added a solution of 3N lithium hydroxide (0.374 mL, 1.123 mmol) and the resulting mixture was stirred at 75 °C. After 1.5 h, the reaction was allowed to cool to rt and was then purified twice by reverse phase preparative HPLC using Preparative Method 3 to give the desired title compound 4- ((lS,3aS,5aR,5bR,7aS,9R, l laS, l lbR,13aR,13bR)-3a-((2-((lS,4S)-2,2-dioxido-2-thia-5- azabicyclo[2.2. l]heptan-5-yl)ethyl)amino)-l-isopropyl-5a,5b,8,8, 1 la- pentamethylicosahydro-lH-cyclopenta[a]chrysen-9-yl)benzoic acid (0.0496 g, 14% yield) as a single isomer TFA salt. LCMS: m/z 707.6 (M+H ⁺ ), 3.96 min (Method 4). ¾ NMR (400 MHz, 1 : 1 mixture of CDC13 and MeOD, MeOD lock) δ ppm 7.90 (d, J=8.1 Hz, 2H), 7.27 (d, J=8.1 Hz, 2H), 3.97 (br. s., 1H), 3.65 (br. s., 1H), 3.15 (d, J=11.5 Hz, 2H), 3.05 (br. s., 3H), 2.99 - 2.89 (m, 1H), 2.83 (d, J=5.9 Hz, 1H), 2.59 (d, J=12.2 Hz, 1H), 2.40 (d, J=11.2 Hz, 1H), 2.05 (d, J=18.1 Hz, 2H), 2.00 - 1.82 (m, 4H), 1.81 - 1.63 (m, 7H), 1.62 - 1.44 (m, 9H), 1.41 (br. s., 1H), 1.39 (s, 3H), 1.24 (br. s., 2H), 1.12 (s, 3H), 1.09 (s, 6H), 0.96 (s, 3H), 0.90 (d, J=6.6 Hz, 3H), 0.81 (d, J=6.6 Hz, 3H), 0.54 (s, 3H).

Example B13

Preparation of 4-((lS,3aS,5aR,5bR,7aS,9R,l laS,l lbR, 13aR, 13bR)-l-isopropyl- 5a,5b,8,8, 1 la-pentamethyl-3a-((2-(4-(methylsulfonyl)piperidin-l- yl)ethyl)amino)icosahydro-lH-cyclopenta[a]chrysen-9-yl)benzo ic acid.

The title compound was prepared by a similar procedure as described in the preparation of 4-((lS,3aS,5aR,5bR,7aS,9R,l laS,l lbR, 13aR, 13bR)-3a-((2-((lS,4S)-2,2- dioxido-2-thia-5-azabicyclo[2.2.1]heptan-5-yl)ethyl)amino)-l -isopropyl-5a,5b,8,8,l la- pentamethylicosahydro-lH-cyclopenta[a]chrysen-9-yl)benzoic acid, except l-(2- chloroethyl)-4-(methylsulfonyl)piperidine, HC1 was used in place of (lS,4S)-5-(2- chloroethyl)-2-thia-5-azabicyclo[2.2.1]heptane 2,2-dioxide hydrochloride in Step 1. Preparative HPLC purification of the crude Step 2 product using Preparative Method 4 gave 49.4 mg of the desired material as a TFA salt (6.4% yield over 2 steps). LCMS: m/z = 723.5 (M+H) ⁺ , 2.29 min (Method 2). Ή ΝΜΡν (400 MHz, 1: 1 mixture of CDC13 and MeOD, MeOD lock) δ 7.96 - 7.88 (m, J=8.3 Hz, 2H), 7.34 - 7.27 (m, J=8.3 Hz, 2H), 3.24 - 3.02 (m, 5H), 2.94 (s, 4H), 2.83 (dd, J=9.0, 3.4 Hz, 1H), 2.71 (d, J=13.2 Hz, 1H), 2.51 - 2.37 (m, 1H), 2.28 - 2.12 (m, 3H), 2.11 - 1.97 (m, 4H), 1.95 - 1.80 (m, 4H), 1.79 - 1.54 (m, 10H), 1.54 - 1.47 (m, 5H), 1.47 - 1.28 (m, 5H), 1.28 - 1.22 (m, 1H), 1.20 (s, 3H), 1.10 (s, 6H), 0.98 (s, 3H), 0.92 (d, J=6.8 Hz, 3H), 0.83 (d, J=6.6 Hz, 3H), 0.55 (s, 3H).

Biology Data for the Examples

• "μΜ" means micromolar;

· "mL" means milliliter;

• "μΐ" means microliter;

• "mg" means milligram;

• ' g" means microgram; The materials and experimental procedures used to obtain the results reported in

Table 1 are described below.

HIV cell culture assay - MT-2 cells and 293T cells were obtained from the NIH AIDS Research and Reference Reagent Program. MT-2 cells were propagated in RPMI 1640 media supplemented with 10% heat inactivated fetal bovine serum, 100 μg/ml penicillin G and up to 100 units/ml streptomycin. The 293T cells were propagated in DMEM media supplemented with 10% heat inactivated fetal bovine serum (FBS), 100 units/ml penicillin G and 100 μg/ml streptomycin. The proviral DNA clone of NL4-3 was obtained from the NIH AIDS Research and Reference Reagent Program. A recombinant NL4-3 virus, in which a section of the nef gene from NL4-3 was replaced with the Renilla luciferase gene, was used as a reference virus. In addition, residue Gag P373 was converted to P373S. Briefly, the recombinant virus was prepared by transfection of the altered proviral clone of NL4-3. Transfections were performed in 293T cells using LipofectAMINE PLUS from Invitrogen (Carlsbad, CA), according to manufacturer's instruction. The virus was titered in MT-2 cells using luciferase enzyme activity as a marker. Luciferase was quantitated using the Dual Luciferase kit from Promega (Madison, WI), with modifications to the manufacturer's protocol. The diluted Passive Lysis solution was pre-mixed with the re-suspended Luciferase Assay Reagent and the re-suspended Stop & Glo Substrate (2: 1 : 1 ratio). Fifty (50) of the mixture was added to each aspirated well on assay plates and luciferase activity was measured immediately on a Wallac TriLux (Perkin-Elmer). Antiviral activities of inhibitors toward the recombinant virus were quantified by measuring luciferase activity in cells infected for 4- 5 days with NLRluc recombinants in the presence serial dilutions of the inhibitor. The EC50 data for the compounds is shown in Table 1. Note that some of the data is provided in abbreviated exponential form such that, for example, 2.53E-3, is equivalent to 2.53 x IO- ³ .

Table 1

The disclosure is not limited to the foregoing illustrative examples and the examples should be considered in all respects as illustrative and not restrictive, reference being made to the appended claims, rather than to the foregoing examples, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced.