Trna synthetase inhibitors

A compound having the structure of formula (I-A):

• or a pharmaceutically acceptable salt thereof;
• wherein:
• R1 is selected from the group consisting of (C3-C8)alkyl, (C2-C8)hydroxyalkyl, (C1-C8)aminoalkyl, (C4-C8)cycloalkyl, aryl, heteroaryl, (CH3SO2)(C1-C8)alkyl, and di((C1-C8)alkyl)amino;
• each of R2, R3, R4, and R5 is independently selected from H, OH, —NH2, halide, sulfonamido, (C1-C6)alkylsulfonyl, —OC(O)((C1-C8)alkyl), —C(O)O((C1-C8)alkyl), —C(O)OH, optionally substituted —NHC(O)(aryl), —C(O)NH2, —B(OH)2, tri((C1-C8)alkyl)silyl, optionally substituted (C1-C8)alkyl, optionally substituted (C1-C8)alkoxy, optionally substituted (C1-C8)aminoalkyl, optionally substituted (C1-C8)hydroxyalkyl, optionally substituted (C1-C8)haloalkyl, optionally substituted (C1-C8)haloalkoxy, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted aryloxy, optionally substituted arylalkoxy, optionally substituted heteroaryloxy, optionally substituted heteroarylalkoxy, optionally substituted (C3-C10)cycloalkyl, optionally substituted (C3-C10)cycloalkoxy, optionally substituted (C2-C9)heterocycloalkyl, optionally substituted (C2-C9)heterocycloalkoxy, (H3CSO2)(C1-C8)alkylene, optionally substituted (Rb2NSO2)(C1-C8)alkylene, optionally substituted di((C1-C8)alkyl)amino, —NH—CH2—R8, —O—CH2—R8, and —O—CH2CH2—O—R9;
• or R2 and R3, R3 and R4, or R4 and R5, taken together with the intervening atoms, form an optionally substituted aryl, heteroaryl, cycloalkyl, or heterocycloalkyl group;
• R6 is H or (C1-C6)alkyl;
• R7 is optionally substituted (C3-C10)cycloalkyl or (C3-C10)cycloalkenyl;
• R8 is selected from —C(O)((C2-C9)heterocycloalkyl), —C(O)NH((C1-C8)alkyl), —C(O)NH(aryl(C1-C8)alkyl), —C(O)NH((C3-C8)cycloalkyl), —C(O)NH((C3-C8)cycloalkyl(C1-C8)alkyl), —C(O)N(CH3)((C3-C8)cycloalkyl), —C(O)N(CH3)(aryl(C1-C8)alkyl), —C(O)NHC(O)NH((C3-C8)cycloalkyl), —C(O)NHC(O)NH((C1-C8)alkyl), —C(O)NHC(O)NH2, optionally substituted heteroaryl wherein the heteroaryl is not 4-pyridinyl, benzimidazole or thiazole, optionally substituted aryloxy(C1-C8)alkyl, (C3-C8)cycloalkyl, (C2-C9)heterocycloalkyl, (C2-C9)heterocycloalkyl(C2-C8)alkyl, heteroaryl(C1-C8)alkyl, (C2-C8)alkoxy, (C3-C8)hydroxyalkyl, (C1-C8)alkoxy(C1-C8)alkyl, (C1-C8)haloalkoxy(C1-C8)alkyl, (C1-C8)thioalkoxy(C1-C8)alkyl, (CH3SO2)(C1-C8)alkyl, and ((C1-C8)alkylC(O))(C1-C8)alkyl;
• R9 is selected from (C3-C10)cycloalkyl, (C3-C10)cycloalkyl(C1-C8)alkyl, (C1-C8)haloalkyl, (C1-C8)hydroxyalkyl, (C1-C8)alkyl, (C1-C8)alkoxy(C1-C8)alkyl, and optionally substituted aryl;
• and
• Rb, independently for each occurrence, is selected from H, optionally substituted (C1-C8)alkyl, optionally substituted (C1-C8)haloalkyl, optionally substituted (C1-C8)hydroxyalkyl, optionally substituted (C3-C10)cycloalkyl, optionally substituted (C3-C10)cycloalkyl(C1-C8)alkyl, optionally substituted aryl, and optionally substituted aryl(C1-C8) alkyl.

A compound having the structure of formula (I-B):

• or a pharmaceutically acceptable salt thereof;
• wherein:
• R1 represents optionally substituted (Rb2NSO2)(C1-C8)alkylene;
• each of R2, R3, R4, and R5 is independently selected from H, OH, —NH2, halide, sulfonamido, (C1-C6)alkylsulfonyl, —OC(O)((C1-C8)alkyl), —C(O)O((C1-C8)alkyl), —C(O)OH, optionally substituted —NHC(O)(aryl), —C(O)NH2, —B(OH)2, tri((C1-C8)alkyl)silyl, optionally substituted (C1-C8)alkyl, optionally substituted (C1-C8)alkoxy, optionally substituted (C1-C8)aminoalkyl, optionally substituted (C1-C8)hydroxyalkyl, optionally substituted (C1-C8)haloalkyl, optionally substituted (C1-C8)haloalkoxy, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted aryloxy, optionally substituted arylalkoxy, optionally substituted heteroaryloxy, optionally substituted heteroarylalkoxy, optionally substituted (C3-C10)cycloalkyl, optionally substituted (C3-C10)cycloalkoxy, optionally substituted (C2-C9)heterocycloalkyl, optionally substituted (C2-C9)heterocycloalkoxy, (H3CSO2)(C1-C8)alkylene, optionally substituted (Rb2NSO2)(C1-C8)alkylene, optionally substituted di((C1-C8)alkyl)amino, —NH—CH2—R8, —O—CH2—R8, and —O—CH2CH2—O—R9;
• or R2 and R3, R3 and R4, or R4 and R5, taken together with the intervening atoms, form an optionally substituted aryl, heteroaryl, cycloalkyl, or heterocycloalkyl group;
• R6 is H or (C1-C6)alkyl;
• R7 is optionally substituted (C3-C10)cycloalkyl or (C3-C10)cycloalkenyl;
• R8 is selected from —C(O)((C2-C9)heterocycloalkyl), —C(O)NH((C1-C8)alkyl), —C(O)NH(aryl(C1-C8)alkyl), —C(O)NH((C3-C8)cycloalkyl), —C(O)NH((C3-C8)cycloalkyl(C1-C8)alkyl), —C(O)N(CH3)((C3-C8)cycloalkyl), —C(O)N(CH3)(aryl(C1-C8)alkyl), —C(O)NHC(O)NH((C3-C8)cycloalkyl), —C(O)NHC(O)NH((C1-C8)alkyl), —C(O)NHC(O)NH2, optionally substituted heteroaryl wherein the heteroaryl is not 4-pyridinyl, benzimidazole or thiazole, optionally substituted aryloxy(C1-C8)alkyl, (C3-C8)cycloalkyl, (C2-C9)heterocycloalkyl, (C2-C9)heterocycloalkyl(C2-C8)alkyl, heteroaryl(C1-C8)alkyl, (C2-C8)alkoxy, (C3-C8)hydroxyalkyl, (C1-C8)alkoxy(C1-C8)alkyl, (C1-C8)haloalkoxy(C1-C8)alkyl, (C1-C8)thioalkoxy(C1-C8)alkyl, (CH3SO2)(C1-C8)alkyl, and ((C1-C8)alkylC(O))(C1-C8)alkyl;
• R9 is selected from (C3-C10)cycloalkyl, (C3-C10)cycloalkyl(C1-C8)alkyl, (C1-C8)haloalkyl, (C1-C8)hydroxyalkyl, (C1-C8)alkyl, (C1-C8)alkoxy(C1-C8)alkyl, and optionally substituted aryl;
• and
• Rb, independently for each occurrence, is selected from H, optionally substituted (C1-C8)alkyl, optionally substituted (C1-C8)haloalkyl, optionally substituted (C1-C8)hydroxyalkyl, optionally substituted (C3-C10)cycloalkyl, optionally substituted (C3-C10)cycloalkyl(C1-C8)alkyl, optionally substituted aryl, and optionally substituted aryl(C1-C8) alkyl.

A compound having the structure of formula (I-C):

• or a pharmaceutically acceptable salt thereof;
• wherein:
• R1 is selected from the group consisting of —O—CH2—R8 and —O—CH2CH2—O—R9;
• each of R2, R3, R4, and R5 is independently selected from H, OH, —NH2, halide, sulfonamido, (C1-C6)alkylsulfonyl, —OC(O)((C1-C8)alkyl), —C(O)O((C1-C8)alkyl), —C(O)OH, optionally substituted —NHC(O)(aryl), —C(O)NH2, —B(OH)2, tri((C1-C8)alkyl)silyl, optionally substituted (C1-C8)alkyl, optionally substituted (C1-C8)alkoxy, optionally substituted (C1-C8)aminoalkyl, optionally substituted (C1-C8)hydroxyalkyl, optionally substituted (C1-C8)haloalkyl, optionally substituted (C1-C8)haloalkoxy, optionally substituted aryl, optionally substituted heteroaryl, optionally substituted aryloxy, optionally substituted arylalkoxy, optionally substituted heteroaryloxy, optionally substituted heteroarylalkoxy, optionally substituted (C3-C10)cycloalkyl, optionally substituted (C3-C10)cycloalkoxy, optionally substituted (C2-C9)heterocycloalkyl, optionally substituted (C2-C9)heterocycloalkoxy, (H3CSO2)(C1-C8)alkylene, optionally substituted (Rb2NSO2)(C1-C8)alkylene, optionally substituted di((C1-C8)alkyl)amino, —NH—CH2—R8, —O—CH2—R8, and —O—CH2CH2—O—R9;
• or R2 and R3, R3 and R4, or R4 and R5, taken together with the intervening atoms, form an optionally substituted aryl, heteroaryl, cycloalkyl, or heterocycloalkyl group;
• R6 is H or (C1-C6)alkyl;
• R7 is optionally substituted (C3-C10)cycloalkyl or (C3-C10)cycloalkenyl;
• R8 is selected from —C(O)((C2-C9)heterocycloalkyl), —C(O)NH((C1-C8)alkyl), —C(O)NH(aryl(C1-C8)alkyl), —C(O)NH((C3-C8)cycloalkyl), —C(O)NH((C3-C8)cycloalkyl(C1-C8)alkyl), —C(O)N(CH3)((C3-C8)cycloalkyl), —C(O)N(CH3)(aryl(C1-C8)alkyl), —C(O)NHC(O)NH((C3-C8)cycloalkyl), —C(O)NHC(O)NH((C1-C8)alkyl), —C(O)NHC(O)NH2, optionally substituted heteroaryl wherein the heteroaryl is not 4-pyridinyl, benzimidazole or thiazole, optionally substituted aryloxy(C1-C8)alkyl, (C3-C8)cycloalkyl, (C2-C9)heterocycloalkyl, (C2-C9)heterocycloalkyl(C2-C8)alkyl, heteroaryl(C1-C8)alkyl, (C2-C8)alkoxy, (C3-C8)hydroxyalkyl, (C1-C8)alkoxy(C1-C8)alkyl, (C1-C8)haloalkoxy(C1-C8)alkyl, (C1-C8)thioalkoxy(C1-C8)alkyl, (CH3SO2)(C1-C8)alkyl, and ((C1-C8)alkylC(O))(C1-C8)alkyl;
• R9 is selected from (C3-C10)cycloalkyl, (C3-C10)cycloalkyl(C1-C8)alkyl, (C1-C8)haloalkyl, (C1-C8)hydroxyalkyl, (C1-C8)alkyl, (C1-C8)alkoxy(C1-C8)alkyl, and optionally substituted aryl;
• and
• Rb, independently for each occurrence, is selected from H, optionally substituted (C1-C8)alkyl, optionally substituted (C1-C8)haloalkyl, optionally substituted (C1-C8)hydroxyalkyl, optionally substituted (C3-C10)cycloalkyl, optionally substituted (C3-C10)cycloalkyl(C1-C8)alkyl, optionally substituted aryl, and optionally substituted aryl(C1-C8) alkyl.