Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K31/00—Medicinal preparations containing organic active ingredients
  • A61K31/56—Compounds containing cyclopenta[a]hydrophenanthrene ring systems; Derivatives thereof, e.g. steroids
  • A61K31/58—Compounds containing cyclopenta[a]hydrophenanthrene ring systems; Derivatives thereof, e.g. steroids containing heterocyclic rings, e.g. danazol, stanozolol, pancuronium or digitogenin
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K31/00—Medicinal preparations containing organic active ingredients
  • A61K31/33—Heterocyclic compounds
  • A61K31/395—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins
  • A61K31/54—Heterocyclic compounds having nitrogen as a ring hetero atom, e.g. guanethidine or rifamycins having six-membered rings with at least one nitrogen and one sulfur as the ring hetero atoms, e.g. sulthiame
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61K—PREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
  • A61K45/00—Medicinal preparations containing active ingredients not provided for in groups A61K31/00 - A61K41/00
  • A61K45/06—Mixtures of active ingredients without chemical characterisation, e.g. antiphlogistics and cardiaca
• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61P—SPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
  • A61P31/00—Antiinfectives, i.e. antibiotics, antiseptics, chemotherapeutics
  • A61P31/12—Antivirals
  • A61P31/14—Antivirals for RNA viruses
  • A61P31/18—Antivirals for RNA viruses for HIV
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
  • C07C309/00—Sulfonic acids; Halides, esters, or anhydrides thereof
  • C07C309/63—Esters of sulfonic acids
  • C07C309/64—Esters of sulfonic acids having sulfur atoms of esterified sulfo groups bound to acyclic carbon atoms
  • C07C309/65—Esters of sulfonic acids having sulfur atoms of esterified sulfo groups bound to acyclic carbon atoms of a saturated carbon skeleton
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
  • C07C309/00—Sulfonic acids; Halides, esters, or anhydrides thereof
  • C07C309/63—Esters of sulfonic acids
  • C07C309/64—Esters of sulfonic acids having sulfur atoms of esterified sulfo groups bound to acyclic carbon atoms
  • C07C309/65—Esters of sulfonic acids having sulfur atoms of esterified sulfo groups bound to acyclic carbon atoms of a saturated carbon skeleton
  • C07C309/66—Methanesulfonates
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D239/00—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings
  • C07D239/02—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings
  • C07D239/06—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member
  • C07D239/08—Heterocyclic compounds containing 1,3-diazine or hydrogenated 1,3-diazine rings not condensed with other rings having one double bond between ring members or between a ring member and a non-ring member with hetero atoms directly attached in position 2
  • C07D239/12—Nitrogen atoms not forming part of a nitro radical
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07D—HETEROCYCLIC COMPOUNDS
  • C07D279/00—Heterocyclic compounds containing six-membered rings having one nitrogen atom and one sulfur atom as the only ring hetero atoms
  • C07D279/10—1,4-Thiazines; Hydrogenated 1,4-thiazines
  • C07D279/12—1,4-Thiazines; Hydrogenated 1,4-thiazines not condensed with other rings
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
  • C07F5/00—Compounds containing elements of Groups 3 or 13 of the Periodic Table
  • C07F5/02—Boron compounds
  • C07F5/025—Boronic and borinic acid compounds
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07F—ACYCLIC, CARBOCYCLIC OR HETEROCYCLIC COMPOUNDS CONTAINING ELEMENTS OTHER THAN CARBON, HYDROGEN, HALOGEN, OXYGEN, NITROGEN, SULFUR, SELENIUM OR TELLURIUM
  • C07F5/00—Compounds containing elements of Groups 3 or 13 of the Periodic Table
  • C07F5/02—Boron compounds
  • C07F5/04—Esters of boric acids
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07J—STEROIDS
  • C07J63/00—Steroids in which the cyclopenta(a)hydrophenanthrene skeleton has been modified by expansion of only one ring by one or two atoms
  • C07J63/008—Expansion of ring D by one atom, e.g. D homo steroids
• • C—CHEMISTRY; METALLURGY
  • C07—ORGANIC CHEMISTRY
  • C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
  • C07C2601/00—Systems containing only non-condensed rings
  • C07C2601/12—Systems containing only non-condensed rings with a six-membered ring
  • C07C2601/16—Systems containing only non-condensed rings with a six-membered ring the ring being unsaturated

Definitions

• the present invention relates to novel compounds useful against HIV and, more particularly, to compounds derived from betulinic acid and other structurally-related compounds which are useful as HIV maturation inhibitors, and to pharmaceutical compositions containing same, as well as to methods for their preparation.
• ⁇ -1 human immunodeficiency virus -1 infection
• ⁇ -1 human immunodeficiency virus -1 infection
• RT nucleoside reverse transcriptase
• AZT didanosine
• VIDEX didanosine
• stavudine or ZERIT ®
• lamivudine or 3TC or EPIVIR ®
• zalcitabine or DDC or HIVID ®
• abacavir succinate or ZIAGEN ®
• Tenofovir disoproxil fumarate salt or VIREAD ®
• emtricitabine or FTC- EMTRIVA®
• COMBIVIR ® contains -3TC plus AZT
• TRIZFVIR ® contains abacavir, lamivudine, and zidovudine
• EPZICOM contains abacavir and lamivudine
• TRUVAD A ® contains VIREAD
• transcriptase inhibitors nevirapine (or VIRAMUNE ® ), delavirdine (or RESCRIPTOR ® ) and efavirenz (or SUSTIVA ® ), ATRIPLA ® (TRUVADA ® + SUSTIVA ® ), and etravirine, and peptidomimetic protease inhibitors or approved formulations: saquinavir, indinavir, ritonavir, nelfinavir, amprenavir, lopinavir, KALETRA ® (lopinavir and Ritonavir), darunavir, atazanavir (REYATAZ ) and tipranavir (APTTVUS ) and cobicistat, and
• integrase inhibitors such as raltegravir (ISENTRESS ), and entry inhibitors such as enfuvirtide (T-20) (FUZEON®) and maraviroc (SELZENTRY®).
• ISENTRESS raltegravir
• T-20 entry inhibitors
• SELZENTRY® maraviroc
• novel anti-HIV agents exhibiting distinct resistance patterns, and favorable pharmacokinetic as well as safety profiles are needed to provide more treatment options.
• Improved HIV fusion inhibitors and HIV entry coreceptor antagonists are two examples of new classes of anti-HIV agents further being studied by a number of investigators.
• HIV attachment inhibitors are a further subclass of antiviral compounds that bind to the HIV surface glycoprotein gpl20, and interfere with the interaction between the surface protein gpl20 and the host cell receptor CD4. Thus, they prevent HIV from attaching to the human CD4 T-cell, and block HIV replication in the first stage of the HIV life cycle.
• the properties of HIV attachment inhibitors have been improved in an effort to obtain compounds with maximized utility and efficacy as antiviral agents.
• US 7,354,924 and US 7,745,625 are illustrative of HIV attachment inhibitors.
• Another emerging class of compounds for the treatment of HIV are called HIV maturation inhibitors.
• Maturation is the last of as many as 10 or more steps in HIV replication or the HIV life cycle, in which HIV becomes infectious as a consequence of several HIV protease-mediated cleavage events in the gag protein that ultimately results in release of the capsid (CA) protein. Maturation inhibitors prevent the HIV capsid from properly assembling and maturing, from forming a protective outer coat, or from emerging from human cells. Instead, non-infectious viruses are produced, preventing subsequent cycles of HIV infection.
• Bevirimat or PA-457 One HIV maturation compound that has been in development has been identified as Bevirimat or PA-457, with the chemical formula of C 36 H 56 0 6 and the IUPAC name of 3 -(3-carboxy-3-methyl-butanoyloxy) lup-20(29)-en-28-oic acid.
• the present invention provides compounds of Formula I below, including pharmaceutically acceptable salts thereof, their pharmaceutical formulations, and their use in patients suffering from or susceptible to a virus such as HIV.
• the compounds of Formula I are effective antiviral agents, particularly as inhibitors of HIV. They are useful for the treatment of HIV and AIDS.
• One embodiment of the present invention is directed to a compound of Formula I, including pharmaceutically acceptable salts thereof:
• Ri is isopropenyl or isopropyl
• X is selected from the group of C 4 _8 cycloalkyl, C 4 _s cycloalkenyl, C 4 _ 9 spirocycloalkyl, C 4 -9 spirocycloalkenyl, C 4 -8 oxacycloalkyl, C 4 -8 dioxacycloalkyl, C6-8 oxacycloalkenyl, Ce- 8 dioxacycloalkenyl, Ce cyclodialkenyl, Ce oxacyclodialkenyl, Ce-9 oxaspirocycloalkyl and Ce-9 oxaspirocycloalkenyl ring,
• Y is selected from the group of -COOR 2 , -C(0)NR 2 S0 2 R 3 , - C(0)NHS0 2 NR 2 R 2 , -NR 2 S0 2 R 2 , -S0 2 NR 2 R 2 , -C 3-6 cycloalkyl-COOR 2 , -C 2 _ 6 alkenyl-COOR 2 , -C 2 _ 6 alkynyl- COOR 2 , -Ci_ 6 alkyl-COOR 2 , -alkylsubstituted C 1-6 alkyl, -CF 2 -COOR 2 , -NHC(0)(CH 2 ) n - COOR 2 , -S0 2 NR 2 C(0)R 2 , _tetrazole, and -CONHOH,
• n 1-6;
• R 2 is -H, -Ci-6 alkyl, -alkylsubstituted Ci_6 alkyl or-arylsubstituted Ci_6 alkyl;
• W is absent, or is -CH 2 or -CO;
• R3 is -H, -Ci-6 alkyl or -alkylsubstituted Ci_6 alkyl
• R4 is selected from the group of -H, -Ci_6 alkyl, -Ci_6 alkyl-C 3 _6 cycloalkyl, -Ci_6 substituted -Ci_6 alkyl, -Ci_6 alkyl-Qi, -Ci_6 alkyl-C 3 _6 cycloalkyl-Qi, aryl, heteroaryl, substituted heteroar l, -CORe, -S0 2 R 7 , -S0 2 NR 2 R 2 , and
• G is selected from the group of -0-, -S0 2 - and -NR 12 ;
• Qi is selected from the group of -Ci_6 alkyl, - Ci_6 fluoroalkyl, heteroaryl, substituted heteroaryl, halogen, -CF 3 , -OR 2 , -COOR 2 , -NR 8 R 9 , -CONR 8 R 9 and -S0 2 R 7 ;
• R5 is selected from the group of -H, -Ci_6 alkyl, -C 3 -6 cycloalkyl, -Ci_6 alkylsubstituted alkyl, -C 1-6 alkyl-NR 8 R 9 , -COR3, -S0 2 R 7 and -S0 2 NR 2 R 2 ; with the proviso that R 4 or R 5 cannot be -COR 6 when W is -CO; with the further proviso that only one of R4 or R5 can be selected from the group of -CORe, -COCOR 6 ,-S0 2 R 7 and -S0 2 NR 2 R 2 ;
• R4 and R5 can be taken together with the adjacent N to form
• R6 is selected from the group of -H, -Ci_6 alkyl, -Ci_6 alkyl-substitutedalkyl, -C3-6 cycloalkyl, -C3-6 substitutedcycloalkyl-Q 2 , -Ci-6 alkyl-Q 2 , -C e alkyl-substitutedalkyl- Q 2 ,-C 3 -6 cycloalkyl-Q 2 , aryl-Q 2 , - R 13 R 14 , and -OR 15 ; wherein Q 2 is selected from the group of aryl, heteroaryl, substituted heteroaryl, -OR 2 , -COOR 2 , -NR 8 R 9 , S0 2 R 7 , -CONHS0 2 R 3 , and -CONHS0 2 NR 2 R 2 ;
• R7 is selected from the group of -H, -C e alkyl, -C e substituted alkyl, -C3-6 cycloalkyl, -CF 3 , aryl, and heteroaryl;
• Rs and R9 are independently selected from the group of -H, -Ci_6 alkyl, -Ci_6 substituted alkyl, aryl, heteroaryl, substituted aryl, substituted heteroaryl, -C 1-6 alkyl-Q 2 , and or Rs and R9 are taken together with the adjacent N to form a cycle selected from the group of:
• M is selected from the group of -R 15 , -S0 2 R 2 , -S0 2 NR 2 R 2 , -OH and -NR 2 R i2 ;
• V is selected from the group of -CR10R11-, -S0 2 -, -O- and -NR 12 -; with the proviso that only one of Rs or R9 can be -COOR 3 ;
• Rio and Rn are independently selected from the group of -H, -Ci_6 alkyl, -C 1-6 substituted alkyl and -C3-6 cycloalkyl;
• Ri 2 is selected from the group of -H, -Ci-6 alkyl, -alkylsubstituted Ci-6 alkyl, -CONR 2 R 2 , -S0 2 R 3 , -S0 2 NR 2 R 2; Ri 3 and R 4 are independently selected from the group of -H, -Ci_6 alkyl, -C3-6 cycloalkyl, -Ci-6 substituted alkyl, -Ci-6 alkyl-Q3, -Ci-6 alkyl-C3-6 cycloalkyl-Q3, Ci-6 substituted alkyl- Q3 and
• Q3 is selected from the group of heteroaryl, substituted heteroaryl, -NR2R12, -CONR2R2, -COOR2, -OR2, and -SO2R3;
• Ri5 is selected from the group of -Ci_6 alkyl, -C3-6 cycloalkyl, -Ci_6 substituted alkyl, -Ci_6 alkyl-Q 3 , -Ci_6 alkyl-C3_6 cycloalkyl-Q 3 and -Ci_6 substituted alkyl-Q 3;
• Ri6 is selected from the group of -H, -Ci_6 alkyl, -NR2R2, and -COOR2;
• Ri6 cannot be -NR2R2; and Ri7 is selected from the group of -H, -Ci-6 alkyl, -COOR3, and aryl.
• a method for treating mammals infected with a virus, especially wherein said virus is HIV comprising administering to said mammal an antiviral effective amount of a compound which is selected from the group of compounds of Formula I, and one or more pharmaceutically acceptable carriers, excipients or diluents.
• the compound of Formula I can be administered in combination with an antiviral effective amount of another AIDS treatment agent selected from the group consisting of: (a) an AIDS antiviral agent; (b) an anti-infective agent; (c) an immunomodulator; and (d) other HIV entry inhibitors.
• Another embodiment of the present invention is a pharmaceutical composition
• a pharmaceutical composition comprising one or more compounds of Formula I, and one or more pharmaceutically acceptable carriers, excipients, and/or diluents; and optionally in combination with another AIDS treatment agent selected from the group consisting of: (a) an AIDS antiviral agent; (b) an anti-infective agent; (c) an immunomodulator; and (d) other HIV entry inhibitors.
• another AIDS treatment agent selected from the group consisting of: (a) an AIDS antiviral agent; (b) an anti-infective agent; (c) an immunomodulator; and (d) other HIV entry inhibitors.
• the present disclosure includes the individual diastereoisomeric forms of the compounds of Formula I, in addition to the mixtures thereof.
• H refers to hydrogen, including its isotopes, such as deuterium.
• C l _ 6 alkyl as used herein and in the claims (unless specified otherwise) mean straight or branched chain alkyl groups such as methyl, ethyl, propyl, isopropyl, butyl, isobutyl, t-butyl, amyl, hexyl and the like.
• C j -C 4 fluoroalkyl refers to F-substituted C x -C 4 alkyl wherein at least one H atom is substituted with F atom, and each H atom can be independently substituted by F atom;
• Halogen or “halo” refers to chlorine, bromine, iodine or fluorine.
• aryl or “Ar” group refers to an all carbon monocyclic or fused-ring polycyclic (i.e., rings which share adjacent pairs of carbon atoms) groups having a completely conjugated pi-electron system. Examples, without limitation, of aryl groups are phenyl, naphthalenyl and anthracenyl. The aryl group may be substituted or unsubstituted.
• the substituent group(s) are preferably one or more selected from alkyl, cycloalkyl, aryl, heteroaryl, heteroalicyclic, hydroxy, alkoxy, aryloxy, heteroaryloxy, heteroalicycloxy, thiohydroxy, thioaryloxy, thioheteroaryloxy, thioheteroalicycloxy, cyano, halogen, nitro, carbonyl, O-carbamyl, N-carbamyl, C-amido, N-amido, C-carboxy, O-carboxy, sulfinyl, sulfonyl, sulfonamido, trihalomethyl, ureido, amino and -NR x R y , wherein R x and R y are independently selected from the group consisting of hydrogen, alkyl, cycloalkyl, aryl, carbonyl, C-carboxy, sulfonyl, trihalomethyl
• heteroaryl refers to a monocyclic or fused ring (i.e., rings which share an adjacent pair of atoms) group having in the ring(s) one or more atoms selected from the group consisting of nitrogen, oxygen and sulfur and, in addition, having a completely conjugated pi-electron system. Unless otherwise indicated, the heteroaryl group may be attached at either a carbon or nitrogen atom within the heteroaryl group. It should be noted that the term heteroaryl is intended to encompass an N-oxide of the parent heteroaryl if such an N-oxide is chemically feasible as is known in the art.
• heteroaryl groups are furyl, thienyl, benzothienyl, thiazolyl, imidazolyl, oxazolyl, oxadiazolyl, thiadiazolyl, benzothiazolyl, triazolyl, tetrazolyl, isoxazolyl, isothiazolyl, pyrrolyl, pyranyl, tetrahydropyranyl, pyrazolyl, pyridyl, pyrimidinyl, quinolinyl, isoquinolinyl, purinyl, carbazolyl, benzoxazolyl, benzimidazolyl, indolyl, isoindolyl, pyrazinyl.
• the substituted group(s) is preferably one or more selected from alkyl, cycloalkyl, aryl, heteroaryl, heteroalicyclic, hydroxy, alkoxy, aryloxy, heteroaryloxy, heteroalicycloxy, thioalkoxy, thiohydroxy, thioaryloxy, thioheteroaryloxy, thioheteroalicycloxy, cyano, halogen, nitro, carbonyl, O-carbamyl, N-carbamyl, C-amido, N-amido, C-carboxy, O-carboxy, sulfinyl, sulfonyl, sulfonamido, trihalomethyl, ureido, amino, and -NR x R y , wherein R x and R y are as defined above.
• a heteroalicyclic group refers to a monocyclic or fused ring group having in the ring(s) one or more atoms selected from the group consisting of nitrogen, oxygen and sulfur. Rings are selected from those which provide stable arrangements of bonds and are not intended to encompass systems which would not exist. The rings may also have one or more double bonds. However, the rings do not have a completely conjugated pi-electron system. Examples, without limitation, of
• heteroalicyclic groups are azetidinyl, piperidyl, piperazinyl, imidazolinyl, thiazolidinyl, 3- pyrrolidin-l-yl, morpholinyl, thiomorpholinyl and its S oxides and tetrahydropyranyl.
• the substituted group(s) is preferably one or more selected from alkyl, cycloalkyl, aryl, heteroaryl, heteroalicyclic, hydroxy, alkoxy, aryloxy, heteroaryloxy, heteroalicycloxy, thiohydroxy, thioalkoxy, thioaryloxy, thioheteroaryloxy,
• thioheteroalicycloxy cyano, halogen, nitro, carbonyl, thiocarbonyl, O-carbamyl, N- carbamyl, O-thiocarbamyl, N-thiocarbamyl, C-amido, C-thioamido, N-amido, C-carboxy, O-carboxy, sulfinyl, sulfonyl, sulfonamido, trihalomethanesulfonamido,
• alkyl group refers to a saturated aliphatic hydrocarbon including straight chain and branched chain groups.
• the alkyl group has 1 to 20 carbon atoms (whenever a numerical range; e.g., "1-20", is stated herein, it means that the group, in this case the alkyl group may contain 1 carbon atom, 2 carbon atoms, 3 carbon atoms, etc. up to and including 20 carbon atoms). More preferably, it is a medium size alkyl having 1 to 10 carbon atoms. Most preferably, it is a lower alkyl having 1 to 4 carbon atoms.
• the alkyl group may be substituted or unsubstituted.
• the substituent group(s) is preferably one or more individually selected from trihaloalkyl, cycloalkyl, aryl, heteroaryl, heteroalicyclic, hydroxy, alkoxy, aryloxy, heteroaryloxy,
• thioheteroalicycloxy cyano, halo, nitro, carbonyl, thiocarbonyl, O-carbamyl, N-carbamyl, O-thiocarbamyl, N-thiocarbamyl, C-amido, C-thioamido, N-amido, C-carboxy, O- carboxy, sulfinyl, sulfonyl, sulfonamido, trihalomethanesulfonamido,
• cycloalkyl refers to an all-carbon monocyclic or fused ring (i.e., rings which share and adjacent pair of carbon atoms) group wherein one or more rings does not have a completely conjugated pi-electron system.
• examples, without limitation, of cycloalkyl groups are cyclopropane, cyclobutane, cyclopentane, cyclopentene, cyclohexane, cyclohexene, cycloheptane, cycloheptene and adamantane.
• a cycloalkyl group may be substituted or unsubstituted.
• the substituent group(s) is preferably one or more individually selected from alkyl, aryl, heteroaryl, heteroalicyclic, hydroxy, alkoxy, aryloxy, heteroaryloxy, heteroalicycloxy, thiohydroxy, thioalkoxy, thioaryloxy, thioheteroaryloxy, thioheteroalicycloxy, cyano, halo, nitro, carbonyl, thiocarbonyl, O-carbamyl, N-carbamyl, O-thiocarbamyl, N-thiocarbamyl, C-amido, C- thioamido, N-amido, C-carboxy, O-carboxy, sulfinyl, sulfonyl, sulfonamido, trihalomethanesulfonamido, trihalomethanesulfonyl,
• alkenyl refers to an alkyl group, as defined herein, having at least two carbon atoms and at least one carbon-carbon double bond.
• alkynyl refers to an alkyl group, as defined herein, having at least two carbon atoms and at least one carbon-carbon triple bond.
• a "hydroxy” group refers to an -OH group.
• alkoxy refers to both an -O-alkyl and an -O-cycloalkyl group as defined herein.
• aryloxy refers to both an -O-aryl and an -O-heteroaryl group, defined herein.
• heteroaryloxy refers to a heteroaryl-O- group with heteroaryl as defined herein.
• heteroalicycloxy refers to a heteroalicyclic-O- group with
• a "thiohydroxy” group refers to an -SH group.
• a “thioalkoxy” group refers to both an S-alkyl and an -S-cycloalkyl group, as defined herein.
• a “thioaryloxy” group refers to both an -S-aryl and an -S-heteroaryl group, as defined herein.
• a “thioheteroaryloxy” group refers to a heteroaryl-S- group with heteroaryl as defined herein.
• a "thioheteroalicycloxy” group refers to a heteroalicyclic-S- group with heteroalicyclic as defined herein.
• aldehyde refers to a carbonyl group where R" is hydrogen.
• O-carboxy refers to a R"C(-0)0-group, with R" as defined herein.
• a “carboxylic acid” group refers to a C-carboxy group in which R" is hydrogen.
• a “trihalomethyl” group refers to a -CZ 3 , group wherein Z is a halogen group as defined herein.
• a "trihalomethanesulfonyl” group refers to an groups with Z as defined above.
• amino refers to an -NH 2 group.
• a “cyano” group refers to a -CN group.
• a “silyl” group refers to a -Si(R") 3 , with R" being (Ci_ 6 )alkyl or phenyl.
• a “hydrazino” group refers to a -NR x NR y R y2 group, with R x , R y , and R y independently being H or (Ci-6)alkyl.
• a "4, 5, or 6 membered ring cyclic N-lactam" group refers to
• a “spiro” group is a bicyclic organic group with rings connected through just one atom.
• the rings can be different in nature or identical.
• the connecting atom is also called the spiroatom, most often a quaternary carbon (“spiro carbon").
• An “oxospiro” or “oxaspiro” group is a spiro group having an oxygen contained within the bicyclic ring structure.
• a “dioxospiro” or “dioxaspiro” group has two oxygens within the bicyclic ring structure. Any two adjacent R groups may combine to form an additional aryl, cycloalkyl, heteroaryl or heterocyclic ring fused to the ring initially bearing those R groups.
• salts and prodrugs of compounds disclosed herein are within the scope of the invention.
• pharmaceutically acceptable salt as used herein and in the claims is intended to include nontoxic base addition salts. Suitable salts include those derived from organic and inorganic acids such as, without limitation, hydrochloric acid, hydrobromic acid, phosphoric acid, sulfuric acid, methanesulfonic acid, acetic acid, tartaric acid, lactic acid, sulfinic acid, citric acid, maleic acid, fumaric acid, sorbic acid, aconitic acid, salicylic acid, phthalic acid, and the like.
• organic and inorganic acids such as, without limitation, hydrochloric acid, hydrobromic acid, phosphoric acid, sulfuric acid, methanesulfonic acid, acetic acid, tartaric acid, lactic acid, sulfinic acid, citric acid, maleic acid, fumaric acid, sorbic acid, aconitic acid, salicylic acid, phthalic acid, and
• pharmaceutically acceptable salt as used herein is also intended to include salts of acidic groups, such as a carboxylate, with such counterions as ammonium, alkali metal salts, particularly sodium or potassium, alkaline earth metal salts, particularly calcium or magnesium, and salts with suitable organic bases such as lower alkylamines
• substituted lower alkylamines e.g. hydroxyl-substituted alkylamines such as diethanolamine
• the compounds of the invention also include “prodrugs".
• prodrug as used herein encompasses both the term “prodrug esters” and the term “prodrug ethers”.
• the invention is directed to a compound of Formula I, including pharmaceutically acceptable salts thereof:
• X is selected from the group of C 4 _8 cycloalkyl, C 4 _s cycloalkenyl, C 4 _g spirocycloalkyl, C 4 _9 spirocycloalkenyl, C 4 _8 oxacycloalkyl, C 4 _8 dioxacycloalkyl, C6-8 oxacycloalkenyl, e 8 dioxacycloalkenyl, e cyclodialkenyl, e oxacyclodialkenyl, C6-9 oxaspirocycloalkyl and Ce-9 oxaspirocycloalkenyl ring,
• X is substituted with A, and wherein A is -Ci-6 alkyl-halo;
• Y is selected from the group of -COOR 2 , -C(0)NR 2 S0 2 R 3 , - C(0)NHS0 2 NR 2 R 2 , -NR 2 S0 2 R 2 , -S0 2 NR 2 R 2 , -C 3 - 6 cycloalkyl-COOR 2 , -C 2 . 6 alkenyl-COOR 2 , -C 2 .
• n 1-6;
• R 2 is -H, -Ci-6 alkyl, -alkylsubstituted Ci_6 alkyl or-arylsubstituted Ci_6 alkyl;
• W is absent, or is -CH 2 or -CO;
• R3 is -H, -Ci-6 alkyl or -alkylsubstituted Ci_6 alkyl
• R4 is selected from the group of -H, -Ci_6 alkyl, -Ci_6 alkyl-C3_6 cycloalkyl, -Ci_6 substituted -Ci_6 alkyl, -Ci_6 alkyl-Qi, -Ci_6 alkyl-C 3 _6 cycloalkyl-Qi, aryl, heteroaryl,
• G is selected from the group of -0-, -S0 2 - and -NR 12 ;
• Qi is selected from the group of -Ci_6 alkyl, - Ci_6 fluoroalkyl, heteroaryl, substituted heteroaryl, halogen, -CF 3 , -OR 2 , -COOR 2 , -NR 8 R 9 , -CONR 8 R 9 and -S0 2 R 7 ;
• R5 is selected from the group of -H, -Ci_6 alkyl, -C 3 -6 cycloalkyl, -Ci_6 alkylsubstituted alkyl, -C 1-6 alkyl-NR 8 R 9 , -COR3, -S0 2 R 7 and -S0 2 NR 2 R 2 ; with the proviso that R4 or R 5 cannot be -COR 6 when W is -CO; with the further proviso that only one of R4 or R5 can be selected from the group of -CORs, -COCOR 6 ,-S0 2 R 7 and -S0 2 NR 2 R 2 ;
• R4 and R5 can be taken together with the adjacent N to form Re is selected from the group of -H, -C e alkyl, -Ci-6 alkyl-substitutedalkyl, -C3-6 cycloalkyl, -C3-6 substitutedcycloalkyl-Q 2 , -Ci_6 alkyl-Q 2 , -Ci_6 alkyl-substitutedalkyl-Q 2 , -C3-6 cycloalkyl-Q 2 , aryl-Q 2 , -NR13R14, and -ORi 5 ; wherein Q 2 is selected from the group of aryl, heteroaryl, substituted heteroaryl, -OR 2 , -COOR 2 , -NR 8 R 9 , S0 2 R 7 , -CONHS0 2 R 3 , and -CONHS0 2 NR 2 R 2 ;
• R7 is selected from the group of -H, -Ci_6 alkyl, -Ci_6 substituted alkyl, -C3-6 cycloalkyl, -CF 3 , aryl, and heteroaryl;
• Rs and R9 are independently selected from the group of -H, -Ci_6 alkyl, -Ci_6 substituted alkyl, aryl, heteroaryl, substituted aryl, substituted heteroaryl, -Ci_6 alkyl-Q 2 , and or Rs and R9 are taken together with the adjacent N to form a cycle selected from the group of:
• M is selected from the group of -R 16 , -S0 2 R 2 , -S0 2 NR 2 R 2 , -OH and -NR 2 R i2 ;
• V is selected from the group of -CR10R11-, -S0 2 -, -O- and -NR 12 -; with the proviso that only one of Rs or R9 can be -COOR 3 ;
• Rio and Rn are independently selected from the group of -H, -Ci_6 alkyl, -C 1-6 substituted alkyl and -C3-6 cycloalkyl;
• Ri 2 is selected from the group of -H, -Ci-6 alkyl, -alkylsubstituted Ci-6 alkyl, -CONR 2 R 2 , -S0 2 R 3 , -S0 2 NR 2 R 2; Ri 3 and R 4 are independently selected from the group of -H, -Ci_6 alkyl, -C3-6 cycloalkyl, -Ci-6 substituted alkyl, -Ci-6 alkyl-Q3, -Ci-6 alkyl-C3-6 cycloalkyl-Q3, Ci-6 substituted alkyl- Q3 and
• Q3 is selected from the group of heteroaryl, substituted heteroaryl, -NR2R12, -CONR2R2, -COOR2, -OR2, and -SO2R3;
• Ri5 is selected from the group of -Ci_6 alkyl, -C3-6 cycloalkyl, -C e substituted alkyl, -C e alkyl-Q 3 , -C 1-6 alkyl-C3_6 cycloalkyl-Q 3 and -Ci_6 substituted alkyl-Q 3;
• Ri6 is selected from the group of -H, -C e alkyl, -NR2R2, and -COOR2;
• Ri6 cannot be -NR2R2; and Ri7 is selected from the group of -H, -Ci-6 alkyl, -COOR3, and aryl.
• More preferred compounds include those wherein Ri is isopropenyl. Also preferred are compounds wherein W is absent.
• X is a C 4 _8 cycloalkenyl, and more preferably, Ce cycloalkenyl.
• compounds of Formula I are preferred wherein A is C1-C3 alkyl-halo, and more preferably methyl-halo, and more preferably methyl-fluoro.
• Y is -COOR2, and more preferably -COOH. In certain embodiments, it is also preferred that Y is -COOH and A is methyl-fluoro. Also preferred are compounds of Formula I wherein Y is in the para position.
• R4 is Ci_ 6 alkyl-Qi, wherein Qi is -NR 8 R 9 .
• R4 is -Ci_ 6 alkyl-C3_ 6 cycloalkyl.
• R5 is N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl-N-(2-aminoethyl)-2-aminoethyl
• Preferred compounds, including pharmaceutically acceptable salts thereof, as part of the invention include the following:
• Preferred compounds, including pharmaceutically acceptable salts thereof, as part of the invention also include the following:
• the compounds above represent the mixture of diastereoisomers, and the two individual disastereomers. In certain embodiments, one of the specific diastereomers may be particularly preferred.
• the compounds of the present invention according to all the various embodiments, may be particularly preferred.
• embodiments described above may be administered orally, parenterally (including subcutaneous injections, intravenous, intramuscular, intrasternal injection or infusion techniques), by inhalation spray, or rectally, and by other means, in dosage unit formulations containing non-toxic pharmaceutically acceptable carriers, excipients and diluents available to the skilled artisan.
• One or more adjuvants may also be included.
• a method of treatment for treating viral infections such as HIV infection and AIDS.
• the treatment involves administering to a patient in need of such treatment a pharmaceutical composition which contains an antiviral effective amount of one or more of the compounds of Formula I, together with one or more pharmaceutically acceptable carriers, excipients or diluents.
• antiviral effective amount means the total amount of each active component of the composition and method that is sufficient to show a meaningful patient benefit, i.e., inhibiting, ameliorating, or healing of acute conditions characterized by inhibition of HIV infection.
• the term refers to that ingredient alone.
• the term refers to combined amounts of the active ingredients that result in the therapeutic effect, whether
• compositions of the invention may be in the form of orally administrable suspensions or tablets; as well as nasal sprays, sterile injectable
• compositions for example, as sterile injectable aqueous or oleaginous suspensions or suppositories.
• Pharmaceutically acceptable carriers, excipients or diluents may be utilized in the pharmaceutical compositions, and are those utilized in the art of pharmaceutical preparations.
• these compositions When administered orally as a suspension, these compositions are prepared according to techniques typically known in the art of pharmaceutical formulation and may contain microcrystalline cellulose for imparting bulk, alginic acid or sodium alginate as a suspending agent, methylcellulose as a viscosity enhancer, and sweeteners/flavoring agents known in the art.
• these compositions may contain microcrystalline cellulose, dicalcium phosphate, starch, magnesium stearate and lactose and/or other excipients, binders, extenders, disintegrants, diluents, and lubricants known in the art.
• the injectable solutions or suspensions may be formulated according to known art, using suitable non-toxic, parenterally acceptable diluents or solvents, such as mannitol, 1,3-butanediol, water, Ringer's solution or isotonic sodium chloride solution, or suitable dispersing or wetting and suspending agents, such as sterile, bland, fixed oils, including synthetic mono- or diglycerides, and fatty acids, including oleic acid.
• suitable non-toxic, parenterally acceptable diluents or solvents such as mannitol, 1,3-butanediol, water, Ringer's solution or isotonic sodium chloride solution, or suitable dispersing or wetting and suspending agents, such as sterile, bland, fixed oils, including synthetic mono- or diglycerides, and fatty acids, including oleic acid.
• the compounds herein set forth can be administered orally to humans in a dosage range of about 1 to 100 mg/kg body weight in divided doses, usually over an extended period, such as days, weeks, months, or even years.
• One preferred dosage range is about 1 to 10 mg/kg body weight orally in divided doses.
• Another preferred dosage range is about 1 to 20 mg/kg body weight in divided doses. It will be understood, however, that the specific dose level and frequency of dosage for any particular patient may be varied and will depend upon a variety of factors including the activity of the specific compound employed, the metabolic stability and length of action of that compound, the age, body weight, general health, sex, diet, mode and time of administration, rate of excretion, drug combination, the severity of the particular condition, and the host undergoing therapy.
• the compounds of this disclosure may be effectively administered, whether at periods of pre-exposure and/or post-exposure, in combination with effective amounts of the AIDS antivirals, immunomodulators, antiinfectives, or vaccines, such as those in the following non-limiting table:
• Famciclovir Smith Kline heipes zoster Famciclovir Smith Kline heipes zoster
• ARC asymptomatic HIV positive, also in combination with AZT/ddl/ddC
• PNU- 140690 Pharmacia Upjohn HIV infection, AIDS, ARC
• Ribavirin (Costa Mesa, CA) positive, LAS, ARC
• VX-478 Vertex HIV infection, AIDS,
• VIREAD ® VIREAD ®
• EMTRIVA ® Emtricitabine
• Interleukin-2 CD4 cell counts (aldeslukin)
• Tumor Necrosis Genentech ARC in combination Factor; TNF w/gamma Interferon
• HIV entry inhibitors examples include DRUGS OF THE FUTURE 1999, 24(12), pp. 1355-1362; CELL, Vol. 9, pp.
• HIV attachment inhibitors are also set forth in US
• Preferred combinations are simultaneous or alternating treatments with a compound of the present disclosure and an inhibitor of HIV protease and/or a non- nucleoside inhibitor of HIV reverse transcriptase.
• An optional fourth component in the combination is a nucleoside inhibitor of HIV reverse transcriptase, such as AZT, 3TC, ddC or ddl.
• a preferred inhibitor of HIV protease is REYATAZ ® (active ingredient Atazanavir). Typically a dose of 300 to 600 mg is administered once a day. This may be co-administered with a low dose of Ritonavir (50 to 500mgs).
• Another preferred inhibitor of HIV protease is KALETRA ® .
• indinavir is the sulfate salt of N-(2(R)-hydroxy-l-(S)-indanyl)-2(R)-phenylmethyl-4-(S)- hydroxy-5-(l-(4-(3-pyridyl-methyl)-2(S)-N'-(t-butylcarboxamido)-piperazinyl))- pentaneamide ethanolate, and is synthesized according to U.S. 5,413,999.
• Indinavir is generally administered at a dosage of 800 mg three times a day.
• Other preferred protease inhibitors are nelfinavir and ritonavir.
• HIV protease is saquinavir which is administered in a dosage of 600 or 1200 mg tid.
• Preferred non- nucleoside inhibitors of HIV reverse transcriptase include efavirenz. These combinations may have unexpected effects on limiting the spread and degree of infection of HIV.
• Preferred combinations include those with the following (1) indinavir with efavirenz, and, optionally, AZT and/or 3TC and/or ddl and/or ddC; (2) indinavir, and any of AZT and/or ddl and/or ddC and/or 3TC, in particular, indinavir and AZT and 3TC; (3) stavudine and 3TC and/or zidovudine; (4) tenofovir disoproxil fumarate salt and emtricitabine.
• the compound of the present invention and other active agents may be administered separately or in conjunction.
• the administration of one element may be prior to, concurrent to, or subsequent to the administration of other agent(s).
• the present invention comprises compounds of Formula I, their pharmaceutical formulations, and their use in patients suffering from or susceptible to HIV infection.
• the compounds of Formula I also include pharmaceutically acceptable salts thereof.
• General procedures to construct compounds of Formula I and intermediates useful for their synthesis are described in the following Schemes (after the Abbreviations).
• KHMDS potassium bis(trimethylsilyl)amide
• TBDMS tert-butyldimethylsilane
• NMO 4-methylmorpholine-N-oxide
• TEA triethylamine
• DIPEA N,N-diisopropylethylamine
• HATU [0-(7-azabenzotriazol-l-yl)-l, l,3,3-tetramethyluronium hexafluorophosphate]
• DCC N,N'-dicyclohexylcarbodiimide
• AIBN azobisisobutyronitrile
• TBAF tetrabutylammonium fluoride
• TBTU 0-(benzotriazol-l-yl)-N,N,N',N'-tetramethyluronium tetrafluoroborate
• PCC pyridinium chlorochromate
• Tf 2 NPh (trifluoromethylsulfonyl)methanesulfonamide
• ⁇ g microgram(s)
• C-3 and C-28 refer to certain positions of a triterpene core as numbered in accordance with IUPAC rules (positions depicted below with respect to an illustrative triterpene: betulin):
• Compounds of Formula I can be prepared from betulinic acid as described in Scheme 1. Curtis rearrangement of betulinic acid can be accomplished without protection of the C-3 hydroxyl group to render the C-17 isocyanate which upon acid hydrolysis affords the C- 17 amine.
• the C-17 amine is then selectively protected with an amine protective group (i.e F-moc, Boc) to then perform the oxidation of the C-3 hydroxy group to a ketone under standard conditions (i.e. PCC, Dess-Martin reagent, etc). Conversion of the ketone into its triflate can be accomplished by methods known to those skilled in the art.
• the protective group in the amino group is then taken off to produce the C-17 unsubstituted amine.
• the C-17 primary amine can be further modified using standard methods, known to those skill in the art. Some examples are shown in the following schemes.
• C-17 amides can be prepared by reacting a carboxylic acid with the C-17 primary amine in the presence of an adequate coupling reagent such as HATU, DCC, and others known to those skilled in the art, in the presence of a base such as Hunig's base, TEA, etc., in the appropriate solvent (DCM, THF, DMF, etc.). Hydrolysis of the carboxylic ester affords the benzoic acid.
• some amides can be prepared by treating the C-17 primary amine with the corresponding carboxylic acid chloride reagent instead of an acid.
• sulfonamines and sulfonamides can be prepared from the C-17 primary amine by using a sulfonyl chloride as the sulfonylating agent.
• C-17 ureas can be prepared by reacting the corresponding carbamoyl chloride or isocyanate in the presence of a base such as Hunig's base, TEA, etc., in the appropriate solvent (DCM, THF, DMF, etc.).
• C-17 carbamates can be prepared in a similar manner using a chloro formate instead of the carbamoyl chloride.
• the C-17 primary amine can be treated with an aldehyde under reductive amination conditions (e.g. NaBH(OAc)3 in the presence of AcOH/NaOAc or Ti(OPr) 4 in a solvent such as THF, 1,4-dioxane, DCE or DCM) to afford C-17 secondary amines.
• an aldehyde under reductive amination conditions (e.g. NaBH(OAc)3 in the presence of AcOH/NaOAc or Ti(OPr) 4 in a solvent such as THF, 1,4-dioxane, DCE or DCM) to afford C-17 secondary amines.
• Some C-17 amines can be prepared by alkylation of the C-17 primary amine with an alkylating agent (R-LG), where LG is a leaving group such as, but not limited to Br, CI, I, mesylate, tosylate or triflate in the presence of a base. Heating may be needed in some cases. Hydrolysis of the carboxylic ester renders the benzoic acid product.
• R-LG alkylating agent
• the dialkylated product can also be formed.
• C-17 amines can be prepared by 1,4-addition to Michael acceptors.
• Substituents R, R' and R" may contain functional groups (i.e. COOH, COOR, OH, NHR) that can be further modified by methods know to those skilled in the art. The modification can be carried out before or after the final deprotection of the carboxylic acid is performed depending on the nature of the functional group.
• functional groups i.e. COOH, COOR, OH, NHR
• the C-17 secondary amine can be further modified (i.e. alkylated, acylated, sulfonylated, etc.) using some of the methods described above or other standard methods known to those skilled in the art.
• Solvent A 90% water, 10% methanol, 0.1% TFA
• Solvent B 10% water, 90% methanol, 0.1% TFA
• Solvent A 90% water, 10% methanol, 0.1% TFA
• Solvent B 10% water, 90% methanol, 0.1% TFA
• Solvent A 90% water, 10% acetonitrile, 0.1% TFA
• Solvent B 10% water, 90% acetonitrile, 0.1% TFA
• Solvent A 90% water, 10% methanol, 0.1% TFA
• Solvent B 10% water, 90% methanol, 0.1% TFA
• Solvent A 10% MeOH - 90% water - 0.1% TFA
• Solvent B 90% MeOH - 10% water - 0.1% TFA
• Solvent A 100% water, 0.05%TFA
• Solvent B 100% acetonitrile, 0.05% TFA
• Solvent A 10% MeOH - 90% water - 0.1 % TFA
• Solvent B 90% MeOH - 10% water - 0.1% TFA
• Solvent A 10% MeOH - 90% water - 0.1% TFA
• Solvent B 90% MeOH - 10% water - 0.1% TFA
• Solvent A 90% water, 10% methanol, 0.1% TFA
• Solvent B 10% water, 90% methanol, 0.1% TFA
• Solvent A 90% Water -10% Methanol-0.1% TFA
• Solvent B 10% Water -90% Methanol-0.1% TFA
• Solvent A 5% Acetonitrile:95% Water: lOmM Ammonium Acetate
• Solvent B 95% Acetonitrile:5% Water: lOmM Ammonium Acetate
• Solvent A 5% Acetonitrile:95% Water: lOmM Ammonium Acetate
• Solvent B 95% Acetonitrile:5% Water: lOmM Ammonium Acetate
• Solvent A 90% water, 10% acetonitrile, 0.1% TFA
• Solvent B 10% water, 90% acetonitrile, 0.1% TFA
• Solvent A 90% water, 10% acetonitrile, 0.1% TFA
• Solvent B 10% water, 90% acetonitrile, 0.1% TFA
• Solvent A 90% water, 10% acetonitrile, 0.1% TFA
• Solvent B 10% water, 90% acetonitrile, 0.1% TFA
• Solvent A 90% water, 10% acetonitrile, 0.1% TFA
• Solvent B 10% water, 90% acetonitrile, 0.1% TFA
• Solvent A 90% water, 10% acetonitrile, 0.1% TFA
• Solvent B 10% water, 90% acetonitrile, 0.1% TFA
• Solvent A 90% water, 10% acetonitrile, 0.1% TFA
• Solvent B 10% water, 90% acetonitrile, 0.1% TFA
• Solvent A 90% water, 10% acetonitrile, 0.1% TFA
• Solvent B 10% water, 90% acetonitrile, 0.1% TFA
• Solvent A 95% water, 5% acetonitrile, 10 mM ammonium acetate
• Solvent B 5% water, 95% acetonitrile, 10 mM ammonium acetate
• Solvent B 10% water, 90% acetonitrile, 0.1% TFA
• Solvent A 95% water, 5% acetonitrile, lOmM ammonium acetate
• Solvent B 5% water, 95% acetonitrile, lOmM ammonium acetate
• Solvent A 90% water, 10% acetonitrile, 0.1% TFA
• Solvent B 10% water, 90% acetonitrile, 0.1% TFA
• Solvent Pair Water - acetonitrile- TFA
• Solvent A 90% Water -10% acetonitrile-0.1% TFA
• Solvent B 10% Water -90% acetonitrile-0.1% TFA
• Solvent Pair Water - acetonitrile- TFA
• Solvent Pair Water - acetonitrile- TFA
• Solvent A 90% Water -10% acetonitrile-0.1% TFA
• Solvent B 10% Water -90% acetonitrile-0.1 % TFA
• Solvent Pair Water - acetonitrile- TFA
• Solvent A 90% Water -10% acetonitrile-0.1% TFA
• Solvent B 10% Water -90% acetonitrile-0.1% TFA
• Solvent Pair Water - acetonitrile- TFA
• Solvent A 90% Water -10% acetonitrile-0.1% TFA
• Solvent B 10% Water -90% acetonitrile-0.1% TFA
• Solvent Pair Water - acetonitrile- TFA
• Solvent A 90% Water -10% acetonitrile-0.1% TFA
• Solvent B 10% Water -90% acetonitrile-0.1% TFA
• Step 1 Preparation of ethyl l,4-dioxaspiro[4.5]decane-8-carboxylate.
• Step 2 Preparation of ethyl 8-formyl-l,4-dioxaspiro[4.5]decane-8-carboxylate.
• reaction mixture was again chilled to -78 °C and treated with a solution of ethyl formate (18.65 mL, 226 mmol) in THF (40 mL) added dropwise over 45 min.
• the resulting light brown reaction mixture was stirred at -78 °C for lh.
• the cold bath was removed and to the mixture was added dropwise saturated aqueous NH 4 C1 (250 mL) and the mixture stirred at ambient temperature for 30 min.
• the resulting yellow mixture was extracted with EtO Ac (3 x 300 mL).
• the combined organic phase was washed with 0.5N HC1 (300 mL), then with brine, dried over MgS0 4 , filtered and concentrated to a brown viscous oil.
• the crude material was purified by flash column chromatography over silica gel (750 g silica, step elution 9: 1 hexanes/EtOAc and 5: 1 hexanes/EtOAc) to provide recovered starting material, ethyl l,4-dioxaspiro[4.5]decane- 8-carboxylate (8.6 g, 40.1 mmol, 26.6 % yield) and the desired product, ethyl 8-formyl- l,4-dioxaspiro[4.5]decane-8-carboxylate (20.1 g, 83 mmol, 55.0 % yield), both as viscous yellow oils.
• Step 3 Preparation of ethyl 8-(hydroxymethyl)-l,4-dioxaspiro[4.5]decane-8-carboxylate.
• the resulting deep orange mixture with significant suspended solids was concentrated under reduced pressure to leave a residue that was put under vacuum to remove excess triflic anhydride, then the residue was redissolved in DCM (150 mL). The mixture was filtered to remove a significant quantity of white solid which was rinsed with DCM. The deep reddish/orange filtrate was concentrated and purified by flash silica gel column chromatography (330 g silica, elution 100% DCM). Product fractions were combined and concentrated to a thick orange oil which was placed under high vacuum with stirring overnight. The color turned to blue/green. Thus was obtained the desired product (20.94 g, 98% yield) as a blue/green viscous oil.
• Step 6 Preparation of benzyl 8-(fluoromethyl)-l,4-dioxaspiro[4.5]decane-8-carboxylate.
• Step 7 In a 2 L round bottom flask cooled in an ice bath were combined benzyl 8- (fluoromethyl)-l,4-dioxaspiro[4.5]decane-8-carboxylate (13.72 g, 44.5 mmol) with THF (500 mL) and then hydrochloric acid, 1.5M aqueous (534 mL, 801 mmol) was added slowly over 2 min. The ice bath was removed and the mixture was stirred at rt for 15 h. The mixture was concentrated under reduced pressure to remove the organic and the remnant was extracted with ethyl acetate (300 mL).
• CHLOROFORM-d ⁇ 166.1, 139.3, 135.7, 128.7, 128.4, 128.2, 126.2, 66.6, 62.7.
• benzyl 2- (fluoromethyl)acrylate (14.2 g, 73.1 mmol) and (buta-l,3-dien-2-yloxy)trimethylsilane (Sigma Aldrich material used as supplied, 18.73 g, 132 mmol) in toluene (200 mL).
• the vessel was evacuated to 80 micron Hg at -78 °C, followed by purging with nitrogen. The process was repeated twice.
• the flask was sealed, and warmed to RT before it was immersed into an oil bath at 125 °C for 22 hours. The mixture was allowed to cool to RT.
• Step 4 The crude material from the previous step (24.6 gm, 73 mmol) was dissolved in THF (200 mL) at RT to form a clear solution. Aqueous IN HC1 (2 mL, 2 mmol) and water 4 mL were added. The clear solution was stirred at RT for a total of 16 hours. The crude reaction mixture was quenched with 150 mL of a 50:50 mixture of saturated aqueous ammonium sodium bicarbonate and water. The organic layer was extracted with EtOAc (3 x 75 mL). The organic layers were combined, and evaporated to dryness to give 18.8 g of a thick syrup.
• Step 1 Preparation of benzyl 1 -(fluoromethyl)-4- (((trifluoromethyl)sulfonyl)oxy)cyclohex-3-enecarboxylate.
• the mixture was stirred at -78 °C for a total of 2.5 h and was then lifted out of the cold bath and stirred for an additional 20 min at rt.
• the mixture was placed back in the -78 °C bath and to it was added with stirring 125 mL of saturated aqueous ammonium chloride.
• the resulting suspension was removed from the cold bath and allowed to come to rt while stirring.
• the mixture was concentrated under reduced pressure to remove the organic solvent, then to the mixture was added ethyl acetate (600 niL) and water (300 mL) and the mixture was shaken and the phases were separated.
• the organic layer was washed with water (2 x 200 mL) and with brine (50mL).
• the organic layer was dried over MgS0 4 , filtered and concentrated under reduced pressure to leave a yellow/orange oil.
• the crude residue was purified by flash silica gel column
• Step 2 Preparation of benzyl l-(fluoromethyl)-4-(4,4,5,5-tetramethyl-l,3,2- dioxaborolan-2-yl)cyclohex-3-enecarboxylate.
• the flask was placed under a nitrogen atmosphere and heated to 70 °C. After 5 h, the mixture was allowed to cool to rt and stood overnight. The reaction mixture was concentrated under reduced pressure and the crude deep red residue was diluted with ethyl acetate (600 mL) and water (300 mL). The mixture was shaken and phases were separated. The organic was washed with water (250 mL) and then with brine (100 mL). The organic phase was dried over anhydrous MgS0 4 , filtered and concentrated under reduced pressure to a deep red viscous oil.
• Step 3 Racemic benzyl l-(fluoromethyl)-4-(4,4,5,5-tetramethyl-l,3,2-dioxaborolan-2- yl)cyclohex-3 -enecarboxylate (11.15 g, 0.0298 mmol) was purified by supercritical fluid chromatography (SFC Method 1) to provide the separated single isomer title compounds: (R -benzyl l-(fluoromethyl)-4-(4,4,5,5-tetramethyl-l,3,2-dioxaborolan-2-yl)cyclohex-3- enecarboxylate. This was the first isomer to elute from the SFC chiral separation.
• Step 2 Preparation of ethyl 2-(tetrahyd -2H-thiopyran-4-yl)acetate
• Step 5 Preparation of 2-( 1 , 1 -dioxidotetrahydro-2H-thiopyran-4-yl)ethyl
• Step 3 Preparation of 4-(l-amino-2-methylpropan-2-yl)thiomorpholine 1,1 -dioxide
• Step 2 NaOH (IN, 2 mL, 2.0 mmol) was added to a solution of ethyl 1 -(fluoromethyl)-4- ((lR,3a5,5aR,5bR,7aR,l la5,l lbR,13aR,13bR)-5a,5b,8,8,l la-pentamethyl-3a-((2-(4- (methylsulfonyl)piperidin- 1 -yl)ethyl)amino)- 1 -(prop- 1 -en-2-yl)- 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]chrysen-9-yl)cyclohex-3-enecarboxylate (180 mg, 0.230 mmol) in 1,4- dioxane (4 mL) and
• the two diasteroisomers were separated using preparative HPLC (method 17).
• the first product to elute was identified as (5)- 1 -(fluoromethyl)-4-
• Example la Alternative preparation method for Example la: (5)-l-(fluoromethyl)-4- ((lR,3a5,5aR,5bR,7aR,l la5,l lbR,13aR,13bR)-5a,5b,8,8,l la-pentamethyl-3a-((2-(4- (methylsulfonyl)piperidin- 1 -yl)ethyl)amino)- 1 -(prop- 1 -en-2-yl)-
• the vessel was purged with nitrogen, and to the reaction flask was added anhydrous THF (180 mL).
• a freshly prepared aqueous 0.5 M K 3 PO 4 solution was purged with nitrogen gas and added to the vessel (60.2 mL, 30.1 mmol).
• the vessel was sealed and the resulting yellow solution was stirred at 80 °C.
• the color of the mixture darkened to a very deep green over 30 min.
• the mixture was heated for 18 h.
• the olive green colored reaction mixture was diluted with EtOAc (700 mL) and washed with 5% aqueous sodium bicarbonate (250 mL x 2) and then with brine (100 mL).
• the aqueous phase was extracted with 2 x 100 mL of chloroform and the organic phases were combined, dried over MgS0 4 , filtered and concentrated to a yellow foam solid.
• the crude material was purified by flash column chromatography (800 g silica, step elution 3: 1 hexanes: acetone for 8 L, then 1 : 1 hexanes: acetone for 4 L).
• Mixed fractions from the first chromatography (1.0 g of material) were repurified by flash silica chromatography (80 g silica, elution gradient 100% hexanes to 3: 1 hexanes: acetone over 8 column volumes, hold 3: 1 hexanes: acetone for 10 column volumes).
• the crude black solid was dissolved in a mixture of chloroform (20 mL) and acetone (5 mL) and was loaded onto a short column composed of silica (approx 60g) with celite on top (approx 25 g). Elution with 1 : 1 acetone:chloroform (500 mL) followed by 3 : 1 acetone:chloroform (1000 mL) removed the black color, and product eluted as a yellow band. Product fractions were combined and concentrated under reduced pressure to a leave hygroscopic yellow foam solid (16 g). A portion of this solid (approx 1.4 g) was readily dissolved in 5 mL of 80:20
• Step 3 In a 500 mL round bottom flask with magnetic stir bar were combined acetonitrile (150 mL) with hydrochloric acid, 6.0M aqueous (37.1 mL, 223 mmol). To the rapidly stirred mixture was added via a dropping funnel a solution of (5)-l- (fluoromethyl)-4-((lR,3aS,5aR,5bR,7aR,l laS.l lbR,13aR,13bR)-5a,5b,8,8,l la- pentamethyl-3 a-((2-(4-(methylsulfonyl)piperidin- 1 -yl)ethyl)amino)- 1 -(prop- 1 -en-2-yl)- 2,3,3a,4,5,5a,5b,6,7,7a,8,l l,l la,l lb,12,13,13a,13b-octadecahydro-lH- cyclopen
• Step 1 Preparation of (R)-benzyl 4-((lR,3aS5aR,5bR,7aR,l laS.l lbR,13aR,13bR)-3a- amino-5a,5b,8,8, 11 a-pentamethyl- 1 -(prop- 1 -en-2-yl)- 2,3,3a,4,5,5a,5b,6,7,7a,8,ll,lla,llb,12,13,13a,13b-octadecahydro-lH- cyclopenta[a]chrysen- -yl)-l-(fluoromethyl)cyclohex-3-enecarboxylate
• the mixture was diluted with THF (20 mL) and water (4 mL), flushed with nitrogen and heated to 50 °C. After heating the mixture for 15.5 h, it was cooled to rt and partially concentrated under reduced pressure. The mixture was diluted with water (75 mL) and extracted with ethyl acetate (3 x 75 mL). The organic layers were dried over magnesium sulfate, filtered, and concentrated under reduced pressure. The residue was purified by flash chromatography using a 0-10% methanol in dichloromethane gradient and a 220 g silica gel column to give the title product (3.34 g, 95 % yield) as an off-white foam.
• Step 2 Preparation of (R)-benzyl l-(fluoromethyl)-4- ((lR,3aS,5aR,5bR,7aR,l la5, l lbR, 13aR, 13bR)-5a,5b,8,8, l la-pentamethyl-3a-((2-(4- (methylsulfonyl)piperidin- 1 -yl)ethyl)amino)- 1 -(prop- 1 -en-2-yl)- 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]chrysen-9-yl)cyclohex-3-enecarboxylate
• the mixture was diluted with acetonitrile (50 mL), flushed with nitrogen, then the flask was sealed and heated to 100 °C. After 4 h of heating, the mixture was cooled to rt and stirred overnight at rt. The mixture was diluted with 50 mL of acetonitrile and an additional lg of l-(2-chloroethyl)-4-(methylsulfonyl)piperidine.HCl was added. The flask was sealed and the mixture was heated to 100 °C for 2 h. The mixture was cooled to rt and concentrated under reduced pressure. The residue was diluted with water (75 mL) and extracted with dichloromethane (3 x 75 mL).
• the mixture was cooled to rt and partially concentrated under reduced pressure.
• the mixture was made acidic by adding IN HC1, and the solids that formed were collected by filtration.
• To the collected solid material was added 20 mL of water and IN NaOH solution (9.38 mL, 9.38 mmol).
• the mixture was stirred for ten minutes, then concentrated under reduced pressure.
• the residue was diluted with water (20 mL) and acetonitrile (30 mL) and treated with TFA (1.445 mL, 18.75 mmol).
• the mixture was then concentrated under reduced pressure and was adsorbed to silica gel and purified using a 20-30% chloroform in acetone gradient and a 220 g silica gel column.
• the fractions containing the expected product were combined and concentrated under reduced pressure to give the product as the TFA salt.
• To convert to the HC1 salt the residue was diluted with 200 mL acetonitrile and 6N HC1 solution
• the mixture was reconverted to the TFA salt for purification by adding 20 mL of water and IN NaOH (8.26 mL, 8.26 mmol), stirring for several minutes, then concentrated under reduced pressure.
• the residue was then diluted with water (20 mL) and acetonitrile (30 mL) and was treated with TFA (1.273 mL, 16.52 mmol).
• the mixture was concentrated under reduced pressure and was adsorbed to silica gel and purified using a 20-30% chloroform in acetone gradient and a 220 g silica gel column. The fractions containing the title compound were combined and concentrated under reduced pressure to give the product as the TFA salt. HPLC of the residue still showed minor impurities present.
• the mixture was purified again using a 150 g C18 column and a 30-90% acetonitrile in water gradient with 0.1% TFA added.
• the fractions containing the expected product were combined and concentrated under reduced pressure to give the product as a white solid, the TFA salt of the title product.
• the residue was dissolved in acetonitrile and was treated with 6N HC1 solution (6.66 mL, 40.0 mmol), then was concentrated under reduced pressure.
• Step 1 Preparation of ethyl 4-((lR,3a5,5aR,5bR,7aR,l la5,l lbR,13aR,13bR)-3a-((2-(l,l- dioxidothiomorpholino)ethyl)amino)-5a,5b,8, 8,11 a-pentamethyl-1 -(prop- l-en-2-yl)- 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]chrysen-9-yl)-l-(fluoromethyl)cyclohex-3-enecarboxylate
• the title compound was prepared in 82% yield following the procedure described above for preparation of ethyl 1 -(fluoromethyl)-4-
• Step 2 The title compound was prepared in 11.5% yield following the procedure described above in step 2 for the preparation of ethyl l-(fluoromethyl)-4- ((lR,3a5,5aR,5bR,7aR,l la5,l lbR,13aR,13bR)-5a,5b,8,8,l la-pentamethyl-3a-((2-(4- (methylsulfonyl)piperidin- 1 -yl)ethyl)amino)- 1 -(prop- 1 -en-2-yl)-
• Example 2 HPLC separation of Example 2 into (S)-4-((lR,3aS,5aR,5bR,7aR,l laS,l lbR,13aR,13bR)- 3a-((2-(l , 1 -dioxidothiomorpholino)ethyl)amino)-5a,5b,8,8, 11 a-pentamethyl- l-(prop-l - en-2-yl)-2,3,3a,4,5,5a,5b,6,7,7a,8,ll,lla,llb,12,13,13a,13b-octadecahydro-lH- cyclopenta[a]chrysen-9-yl)-l-(fluoromethyl)cyclohex-3-enecarboxylic acid (Example 2a) and (R)-4-(( lR,3aS,5aR,5bR,7aR, 11 aS, 1 IbR,
• the two diasteroisomers were separated using preparative HPLC (method 17).
• the first product to elute was identified as (S)-4-((lR,3aS,5aR,5bR,7aR,llaS,llbR,UaR,l3bR)-3a- ((2-( 1 , 1 -dioxidothiomorpholino)ethyl)amino)-5a,5b,8,8, 11 a-pentamethyl- 1 -(prop- 1 -en-2- yl)-2,3,3a,4,5,5a,5b,6,7,7a,8,ll,lla,llb,12,13,13a,13b-octadecahydro-lH- cyclopenta[a]chrysen-9-yl)-l-(fluoromethyl)cyclohex-3-enecarboxylic acid, (Example 2a) (white solid, 7 mg, 33%).
• the second eluting compound isolated was identified as
• Step 1 Preparation of (R)-benzyl 4-((lR,3aS,5aR,5bR,7aR,l laS,l lbR,13aR,13bR)-3a-((2- (1,1 -dioxidothiomorpholino)ethyl)amino)-5a,5b,8,8, 11 a-pentamethyl- 1 -(prop- 1 -en-2-yl)- 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]chrysen-9-yl)-l-(fluoromethyl)cyclohex-3-enecarboxylate
• Step 2 A solution of (R)-benzyl 4-((lR,3a5,5aR,5bR,7aR, l la5, l lbR, 13aR,13bR)-3a-((2- (1,1 -dioxidothiomorpholino)ethyl)amino)-5a,5b,8,8, 1 1 a-pentamethyl- 1 -(prop- 1 -en-2-yl)- 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]chrysen-9-yl)-l-(fluoromethyl)cyclohex-3-enecarboxylate (2.3 g, 2.81 mmol) in 1,4-dioxane (60 mL) and 3 ⁇ 40 (30 mL) was cooled in an ice bath, and
• the resulted cloudy mixture was warmed to RT then stirred at 70 °C for 2 h.
• the reaction mixture was cooled to RT and then placed in an ice bath before it was neutralized with 0.5N HCl.
• the mixture was stirred overnight.
• the precipitated solid was collected by filtration, washed with MeOH - H 2 0 and dried under vacuum.
• the solid was dissolved in MeCN (80 mL) and dioxane (20 mL), and 6 N HCl (50 mL) was added dropwise. The mixture was stirred for 1 h.
• Step 1 Preparation of (R)-benzyl 4-((lR,3aS,5aR,5bR,7aR,l laS,l lbR,13aR,13bR)-3a- ((2-( 1 , 1 -dioxidothiomorpholino)ethyl)amino)-5a,5b,8,8, 11 a-pentamethyl- 1 -(prop- 1 -en-2- yl)-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]chrysen-9-yl)-l-(fluoromethyl)cyclohex-3-enecarboxylate .
• the mixture was diluted with THF (50 mL) and water (10 mL), flushed with nitrogen and then heated to 50 °C for 22 h.
• the mixture was cooled to rt, partially concentrated and diluted with water (150 mL), extracted with ethyl acetate (3 x 150 mL) (some solids were noticed between the layers on the first extraction so excess ethyl acetate was added to make sure the product was dissolved), dried over magnesium sulfate, filtered, and concentrated under reduced pressure.
• the residue was purified by flash chromatography using a 0-10% methanol in dichloromethane gradient and a 220 g silica gel column. The fractions containing the product were combined and concentrated under reduced pressure to give the product as a yellow solid with minor impurities present that will be carried to the next step.
• the mixture was diluted with acetonitrile (200 mL), flushed with nitrogen, sealed, and heated to 100 °C. After heating the mixture for 16 h, it was cooled to rt, transferred to a rb flask using dichloromethane and then concentrated under reduced pressure. The residue was diluted with water (200 mL) and extracted with ethyl acetate (200 mL then 2 x 150 mL). The organic layers were washed with brine, dried over sodium sulfate, filtered, and concentrated under reduced pressure. The residue was purified by flash chromatography using a 0-6% methanol in dichloromethane gradient and a 330g silica gel column.
• the fractions containing the expected product were combined and concentrated under reduced pressure to give the product along with other impurities as a thick red oil.
• the fractions containing the product were combined and concentrated under reduced pressure to give the TFA salt of the product. Less pure fractions were combined and concentrated then were purified again using the same reverse phase method above.
• the TFA salt of the products was diluted with sat. aq.
• Step 4 IN HCl solution (5 mL, 5.00 mmol) was added to the mixture and it was partially concentrated under reduced pressure until solids began to form, then the mixture was put in the refrigerator overnight.
• Step 1 Preparation of (5)-benzyl 4-((lR,3aS,5aR,5bR,7aR,l laS,l lbR,13aR,13bR)-3a- amino-5a,5b,8,8, 11 a-pentamethyl- 1 -(prop- 1 -en-2-yl)- 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]chrysen-9-yl)-l-(fluoromethyl)cyclohex-3-enecarboxylate.
• the reaction mixture was diluted with EtOAc (70 mL) and washed with 5% aqueous sodium bicarbonate (25 mL x 2) and then with brine (10 mL). The aqueous layer was extracted with 2 x 10 mL of chloroform and the organic phases were combined, dried over MgSC , filtered and concentrated to a yellow foamy solid.
• Step 3 In a 1 dram vial with PTFE screw cap were combined the crude mixture from Step 2 containing (5)-benzyl 1 -(fluoromethyl)-4-
• Step 1 Preparation of (5)-benzyl 4-((lR,3aS,5aR,5bR,7aR,l laS,l lbR,13aR,13bR)-3a-((2- ((15',45)-2,2-dioxido-2-thia-5-azabicyclo[2.2.1]heptan-5-yl)ethyl)amino)-5a,5b,8,8,l la- pentamethyl-l-(prop-l-en-2-yl)-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]chrysen-9-yl)-l-(fluoromethyl)cyclohex-3- enecarboxylate.
• Step 2 In a 1 dram vial with PTFE screw cap were combined the crude mixture from Step 1 containing (5)-benzyl 4-((lR,3a5,5aR,5bR,7aR,l la5,l lbR,13aR,13bR)-3a-((2- ((15',45)-2,2-dioxido-2-thia-5-azabicyclo[2.2.1]heptan-5-yl)ethyl)amino)-5a,5b,8,8,l la- pentamethyl-l-(prop-l-en-2-yl)-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]chrysen-9-yl)-l-(fluoromethyl)cyclohex-3- enecarboxylate (0.115 g, 0.139 m
• Step 1 Preparation of 4-(2-chloroethyl)-l,4-thiazepane 1,1 -dioxide.
• the vessel was sealed and heated to 120 °C in an oil bath with stirring for 17h.
• the reaction mixture was concentrated under reduced pressure, taken up in EtOAc (30 mL) and washed with water (3 x 10 mL) and with brine (5 mL).
• the combined aqueous phases were extracted with chloroform (10 mL) and the organic phases were combined and concentrated under reduced pressure.
• the crude residue thus obtained was carried into the saponification step as-is with no further purification.
• Step 3 In a 1 dram vial with PTFE screw cap were combined the crude mixture from Step 2 containing (S)-benzyl 4-((lR,3a5,5aR,5bR,7aR,l la5,l lbR,13aR,13bR)-3a-((2-(l,l- dioxido-l,4-thiazepan-4-yl)ethyl)amino)-5a,5b,8,8,l 1 a-pentamethyl- 1 -(prop- l-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]chrysen-9-yl)-l-(fluoromethyl)cyclohex-3-enecarboxylate (0.126 g, 0.152 mmol) with lithium hydroxide, 1.0
• Step 1 Preparation of l-(2-chloroethyl)-4-(methylsulfonyl)piperazine.
• Step 2 Preparation of (5)-benzyl 1 -(fluoromethyl)-4- ((lR,3a5,5aR,5bR,7aR,l la5,l lbR,13aR,13bR)-5a,5b,8,8,l la-pentamethyl-3a-((2-(4- (methylsulfonyl)piperazin- 1 -yl)ethyl)amino)- 1 -(prop- 1 -en-2-yl)- 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]chrysen-9-yl)cyclohex-3-enecarboxylate.

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