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What is claimed is: 1. An HIV protease inhibitor represented by a formula: description="In-line Formulae" end="lead"X-A-B-A'-X'description="In-line Formulae" end="tail" wherein X is a 5-7 membered non-aromatic monocyclic heterocycle, wherein said heterocycle is fused or bridged with one or more 3-7 membered non-aromatic monocyclic heterocycle to form a polycyclic system, wherein any of said heterocyclic ring systems contains one or more heteroatoms selected from O and S; wherein any sulfur may be optionally be substituted by one or two oxygen atoms;...
What is claimed is: 1. An HIV protease inhibitor represented by a formula: description="In-line Formulae" end="lead"X-A-B-A'-X'description="In-line Formulae" end="tail" wherein X is a 5-7 membered non-aromatic monocyclic heterocycle, wherein said heterocycle is fused or bridged with one or more 3-7 membered non-aromatic monocyclic heterocycle to form a polycyclic system, wherein any of said heterocyclic ring systems contains one or more heteroatoms selected from O and S; wherein any sulfur may be optionally be substituted by one or two oxygen atoms; and wherein any of said ring systems optionally contains 1 to 6 substituents selected from the group consisting of R2, R3, R5, and R6; A is OCONH or CONH; B is wherein D is aralkyl optionally substituted with one or more groups selected from alkyl, halo, nitro, cyano, CF3, C3-C7 cycloalkyl, C5-C7 cycloalkenyl, R6, OR2, SR2, NHR2, OR3, SR3, NHR3, OR6, SR6, and NHR6; A' is N(D')E', wherein D' is selected from alkyl, alkenyl, alkynyl, aryl, cycloalkyl, and aralkyl, optionally, substituted by alkyl, halo, nitro, cyano, CF3, O-alkyl, or S-alkyl, and E' is--SO2--; X' is wherein Z"' is O or NR9 Q' is O, NR9, or CU"U'"; R9 is selected from the group consisting of: alkyl optionally substituted by R3, R5, R6; C2-C6 alkenyl, C2-C6 alkynyl, C3-C8 cycloalkyl, and C5-C8 cycloalkenyl, which groups may be optionally substituted with one or more substituents selected from the group consisting of--OR2, C(O)N(R2)2, S(O)nN(R2)2, CN, SR2, SOnR2, COR2, CO2R2 or NR2C(O)R2, R5, and R7; aryl, wherein said aryl may be optionally substituted with one or more groups selected from the group consisting of aryl, R2, R3, R4, and R6; C3-C7 cycloalkyl optionally substituted by R2, R3, R5, R6; CO2H or R7; NR3R3, NR6R6, NR7R7, NR3R6, NR6R7, NR3R7, NR2R3, NR2R6, NR2R7, NR2R2; SOnN(R2)2, SOnN(R3)2, SO2N(R6)2, SOnN(R7)2, SOn NR2R3, SOnNR2R6, SOnNR2R7 SOnNR3R6 SOn NR3R7, SOnNR6R7; S(O)mR2, S(O)mR3, S(O)mR6, provided R2 is not H; and m is 0, 1 or 2; U" and U'" are each independently H, OR3, OR6, OR7, OR2; alkyl substituted by R3, R5, R6; C2-C6 alkenyl, C2-C6 alkynyl, C3-C8 cycloalkyl, and C5-C8 cycloalkenyl, which groups may be optionally substituted with one or more substituents selected from the group consisting of--OR2, C(O)N(R2) 2, S(O)nN(R2)2, CN, SR2, SOnR2, COR2, CO2R2 or NR2C(O)R2, R5, and R7; aryl, wherein said aryl may be optionally substituted with one or more groups selected from the group consisting of aryl, R2, R3, R4, and R6; C3-C7 cycloalkyl substituted by R2, R3, R5, R6; CO2H or R7; NR3R3, NR6R6, NR7R7, NR3R6, NR6R7, NR3R7, NR2R3, NR2R6, NR2R7, NR2R2; SOnN(R2)2, SOnN(R3)2, SOnN(R6)2, SOnN(R7)2, SOn NR2R3, SOnNR2R6, SOnNR2R7, SOnNR3R6, SO nNR3R7, SOnNR6R7, S(O)mR2, S(O)mR3, and S(O)mR6, provided R2 is not H: and m is 0, 1 or 2; and U" and U'" cannot both be H unless one of U and U' is not H; R is selected from the group consisting of H, alkyl, aryl, alkenyl,alkynyl, cycloalkyl, and cycloalkenyl, optionally substituted by halo, hydroxy, alkoxy, aryloxy, cycloallcoxy, cyano, nitro, alkylthio, arylthio, cycloalkylthio, amino, or mono-or dialkylamino, mono-or diarylamino, mono-or di-cycloalkylamino, alkanoyl, cycloalkanoyl, aroyl, carboxamido, mono-or dialkylcarboxamido, mono-or diarylcarboxainido, sulfonamido, mono-or dialkylsulfonamido, mono-or diarylsulfonamido, alkylsulfinyl, alkylsulfonyl, arylsulfinyl, arylsulfonyl, cycloalkylsulfinyl, and cycloalkylsulfonyl; R2 is H or C1-C6 alkyl; optionally substituted by C2-C6 alkenyl, C2-C6 alkynyl, C3-C8 cycloalkyl, or C5-C8 cycloalkenyl; which groups may be optionally substituted with one or more substituents selected from the group consisting of halo, OR, ROH, R-halo, NO2, CN, COnR, CON(R)2, C(S)R, C(S)N(R)2, SOn N(R)2, SR, SOnR, N(R)2, N(R)COnR, NRS(O)nR, NRC[═N(R)]N(R)2, N(R)N(R)COnR, NRPOnN(R)2, NRPOnOR, oxo, ═N--OR, ═N--N(R)2, ═NR, ═NNRC(O)N(R)2, ═NNRCO nR, ═NNRS(O)nN(R)2, and ═NNRS(O) n(R); or R2 is C1-C6 alkyl; substituted by aryl; which groups may be optionally substituted with one or more substituents selected from the group consisting of halo, OR, ROH, R-halo, NO2, CN, COn R, CON(R)2, C(S)R, C(S)N(R)2, SOnN(R)2 , SR, SOnR, N(R)2, N(R)COnR, NRS(O)nR, NRC[═N(R)]N(R)2, N(R)N(R)COnR, NRPOnN(R) 2, and NRPOnOR; or R2 is C1-C6 alkyl; optionally substituted by halo, OR, ROH, R-halo, NO2, CN, COnR, CON(R)2, C(S)R, C(S)N(R)2, SOnN(R)2, SR, SOnR, N(R)2, N(R)COnR, NRS(O)nR, NRC[═N(R)]N(R)2, N(R)N(R)COnR, NRPOnN(R) 2, NRPOnOR, oxo, ═N--OR, ═N--N(R)2, ═NR, ═NNRC(O)N(R)2, ═NNRCOnR, ═NNRS(O)nN(R) 2, or ═NNRS(O)n(R); R3 is selected from the grouy consisting of C2-C6 alkenyl, C2-C6 alkynyl, C3-C8 cycloalkyl, and C5-C8 cycloalkenyl; which groups may be optionally substituted with one or more substituents selected from the group consisting of halo, OR2, R2--OH, R2-halo, NO2, CN, CO nR2, C(O)N(R2)2, C(O)N(R2)N(R2)2, C(S)R2, C(S)N(R2) 2, S(O)nN(R2)2, SR2, SOnR2, N(R)2, N(R2)COnR2, NR2S(O)nR2, NR2C[═N(R2)]N(R2)2 , N(R2)N(R2)COnR2, NR2POnN(R2)2, NR2PO nOR2, oxo, ═N--OR2, ═N--N(R2)2, ═NR2, ═ NNRC(O)N(R2)2, ═NNR2C(O)nR2, ═NNR2S(O) nN(R2)2, and ═NNR2S(O)n(R2); R4 is selected from the group consisting of halo, OR8, R2--OH, R3--OH, R2-halo, R3-halo, NO2, CN, COnR8, COn R8, CON(R8)2, C(O)N(R8)N(R8)2, C(S)R8, C(S)N(R8) 2, SOnN(R8)2, SR8, SOnR8, N(R8)2, N(R8) COnR8, NR8S(O)nR8, NR8C[═N(R8)]N(R8)2, N(R8)N(R8)COnR8, NR8POnN(R8)2 NR8POn OR8, OC(O)R2, OC(S)R8, OC(O)N(R8)2, OC(S)N(R8)2, and OPOn(R8)2; R5 is selected from the group consisting of OR8, N(R8) 2, NHOH, N(R8)COR8, NR8S(O)nR8, NR8C[═N(R8)]N(R8) 2, N(R8)N(R8)C(O)R8, NR8POnN(R8)2, NR8POn OR8, R2OH, R3--OH, R2-halo, R3-halo, CN, COnR8; provided that when n=2, R8 is not H; CON(R8)2, C(O)N(R8)N(R8)2, C(S) nR8, C(S)N(R8)2, S(O)nR8, SOnN(R8) 2, halo, NO2, SR8, oxo, ═N--OH, ═N--OR8, ═N--N(R8)2, ═NR8, ═NNR8C(O)N(R8)2, ═NNR8C(O) nR8, ═NNR8S(O)nN(R8)2, ═NNR8S(O) n(R8), and R3 R6 is aryl wherein said aryl may be optionally substituted with one or more groups selected from aryl, R2, R3, halo, OR2, R2OH, R2-halo, NO2, CN, COnR2, C(O)N(R2)2, C(O)N(R2) N(R2)2, C(S)R2, C(S)N(R2)2, S(O)nN(R2) 2, SR2, SOnR2, N(R)2, N(R2)COnR2, NR2S(O) nR2, NR2C[═N(R2)]N(R2)2, N(R2)N(R2)COnR2, NR2POnN(R2)2, NR2POnOR2, OC(O)R2, OC(S)R2, OC(O)N(R2)2, OC(S)N(R2)2, and OPOn(R2)2 R7 is selected from the group consisting of C(O)nR8; provided that when n=2; R8 is not H; C(S)R8, C(O)N(R8)2, C(S) N(R8)2, S(O)nR8, and S(O)nN(R8)2; R8 is R2, R3, or R6; each n is independently 1 or 2; its stercoisomeric forms; and its pharmacologically acceptable salts. 2. The compound according to claim 1, wherein X is Y is O, or S; Z is O, or S; and wherein any ring carbon is optionally substituted by R2, R3, R5, or R6. 3. The compound according to claim 1, wherein X is wherein G is C, O, or S; n is an integer between 1-2; and wherein any ring carbon is optionally substituted by R2, R3, R5, or R6. 4. The compound according to claim 1, wherein X is wherein J is independently CH2, or O, and wherein any ring carbon is optionally substituted by R2, R3, R5, or R6. 5. The compound according to claim 1, wherein: X is wherein any ring carbon is optionally substituted by R2, R3, R5, or R6. 6. The compound according to claim 1, wherein X is wherein each L is independently H, lower alkyl, oxo, or L forms a carbocyclic or heterocyclic ring with M; each M is independently H, OH, chloro, fluoro, or M forms a carbocyclic or heterocyclic ring with Q, provided that if one M is OH, the other M is not OH; Q is H, OH, amino, lower alkyl, alkylamino, alkoxy, halo, or forms a 3-7-membered carbocyclic or heterocyclic ring together with T; each F is independently H, OH, lower alkyl, halo, or spirocylopropyl, provided that if one R is OH, the other R is not OH; T is H or F, or T forms a carbocyclic or heterocyclic ring together with F. 7. The HIV protease inhibitor according to claim 1, wherein X is tetrahydrofurodihydrofuranyl, tetrahydrofurotetrahydrofuranyl, tetrahydropyranotetrahydrofuranyl or tetrahydropyranodihydrofliranyl; A is OCONH; B is wherein D is aralkyl optionally substituted with one or more groups selected from alkyl, halo, nitro, cyano, CF3, C3-C7 cycloalkyl, C5-C7 cycloalkenyl, R6, OR2, SR2, NHR2, OR3, SR3, NHR3, OR6, SR6 and NHR6; and A' is N(D')E', wherein D' is alkyl, alkenyl, alkynyl aryl, cycloalkyl, or aralkyl optionally substituted by alkyl, halo, or CF 3, and E' is--SO2--. 8. The HIV protease inhibitor according to claim 1, wherein: X is tetrahydrofurotetrahydrofuranyl; A is OCONH; B is wherein D is benzyl; and A' is N(D')E', wherein D' is isobutyl and E' is--SO2--. 9. The HIV protease inhibitor according to claim 1, wherein: X is wherein A3 is H, F or alkoxy; B3 is F, alkoxy, lower alkyl, or A3 and B3 can form a 3-7 membered heterocyclic ring; Z' is O, or S; and n is an integer between 1-3. 10. A compound according to claim 1, bound in a complex with wild type or drug resistant mutant forms of HIV-1 protease. 11. A pharmaceutical composition comprising an effective amount of an inhibitor according to claim 1 and a pharmaceutically acceptable additive, excipient, or diluent. 12. A pharmaceutical composition comprising an effective amount inhibitor according to claim 1 and another antiretroviral agent. 13. A pharmaceutical composition comprising an effective amount of an inhibitor according to claim 1 and a second HIV inhibitor. 14. A pharmaceutical composition comprising an inhibitor according to claim 1 and an additional HIV protease inhibitor. 15. A pharmaceutical composition comprising an effective amount of an inhibitor according to claim 1 and an HIV reverse transcriptase inhibitor. 16. A method of treating a patient suffering from HIV infection, comprising administering to said patient a composition according to claim 1. 17. A method of treatment according to claim 16 wherein said patient is suffering from a multi-drug resistant HIV infection. 18. An HIV protease inhibitor according to claim 1 description="In-line Formulae" end="lead"X-A-B-A'-X' I description="In-line Formulae" end="tail" wherein X comprises first and second hydrogen bond acceptor atoms HA1:X and HA2:X, wherein HA1:X forms a hydrogen bond with N29 of HIV protease and HA2:X forms a hydrogen bond with N30 of HIV protease at the relative positions designated in Table 8; wherein A comprises a hydrogen bond acceptor atom HA :A, and a hydrogen bond donor atom HD:A, and wherein HA :A forms a hydrogen bond with solvated water301 of said protease at a relative position designated by O301, and HD:A forms a hydrogen bond with the backbone CO atom of residue 27 of said protease at a relative position designated by O27; wherein B comprises a hydrogen bond donor or acceptor atom HD/A:B, wherein HD/A:B forms a hydrogen bond with either or both carboxylate side chain oxygens of Asp25 and Asp 125 of said protease at relative positions designated by OD1 25, OD2 25, OD1 125, and OD2 125; wherein A' comprises a hydrogen bond acceptor atom HA :A', wherein HA:A' forms a hydrogen bond with solvated water301 of said protease at a relative position designated by O301; and wherein X' comprises a hydrogen bond acceptor atom HA :X', wherein HA:X' forms a hydrogen bond with backbone NH atoms of residues 129 and/or 130 of said protease at relative positions designated by N129 and/or N130. 19. A compound according to claim 18, bound in a complex with wild type or drug resistant mutant forms of HIV1 protease. 20. A pharmaceutical composition comprising an effective amount of an inhibitor according to claim 18 and a pharmaceutically acceptable additive, excipient, or diluent. 21. A pharmaceutical composition comprising an effective amount inhibitor according to claim 18 and another antiretroviral agent. 22. A pharmaceutical composition comprising an effective amount of an inhibitor according to ciaim 18 and a second HIV inhibitor. 23. A pharmaceutical composition comprising an inhibitor according to claim 18 and an additional HIV protease inhibitor. 24. A pharmaceutical composition comprising an effective amount of an inhibitor according to claim 18 and an HIV reverse transcriptase inhibitor. 25. A method of treating a patient suffering from HIV infection, comprising administering to said patient a composition according to claim 18. 26. A method of treatment according to claim 25 wherein said patient is suffering from a multi-drug resistant HIV infection.
