3-aryl bicyclic [4,5,0] hydroxamic acids as HDAC inhibitors

A compound of Formula I:

• or a pharmaceutically acceptable salt, hydrate, tautomer or isomer thereof,
• wherein:
• X1 is O;
• X2 and X4 are each CR1R2;
• X3 is CR1′R2′;
• Y1 and Y4 are not bonded to —C(O)NHOH and are each CR1;
• Y2 and Y3 are each CR1 when not bonded to —C(O)NHOH and Y2 and Y3 are C when bonded to —C(O)NHOH;
• L is selected from the group consisting of a bond, —(CR1R2)n—, —C(O)O—, —C(O)NR3—, —S(O)2—, —S(O)2NR3—, —S(O)—, and —S(O)NR3—, wherein L is bound to the ring nitrogen through the carbonyl or sulfonyl group;
• R is independently selected from the group consisting of —H, —C1-C6 alkyl, —C2-C6 alkenyl, —C4-C8 cycloalkenyl, —C2-C6 alkynyl, —C3-C8 cycloalkyl, —C5-C12 spirocycle, heterocyclyl, spiroheterocyclyl, aryl, and heteroaryl containing 1 to 5 heteroatoms selected from the group consisting of N, S, P, and O, wherein each alkyl, alkenyl, cycloalkenyl, alkynyl, cycloalkyl, spirocycle, heterocyclyl, spiroheterocyclyl, aryl, or heteroaryl is optionally substituted with one or more substituents selected from the group consisting of —OH, halogen, oxo, —NO2, —CN, —R1, —R2, —OR3, —NHR3, —NR3R4, —S(O)2NR3R4, —S(O)2R1, —C(O)R1, —CO2R1, —NR3S(O)2R1, —S(O)R1, —S(O)NR3R4, —NR3S(O)R1, heterocycle, aryl, and heteroaryl containing 1 to 5 heteroatoms selected from the group consisting of N, S, P, and O;
• each R1 and R2 are independently, and at each occurrence, selected from the group consisting of —H, —R3, —R4, —C1-C6 alkyl, —C2-C6 alkenyl, —C4-C8 cycloalkenyl, —C2-C6 alkynyl, —C3-C8 cycloalkyl, heterocyclyl, aryl, heteroaryl containing 1 to 5 heteroatoms selected from the group consisting of N, S, P, and O, —OH, halogen, —NO2, —CN, —NHC1-C6 alkyl, —N(C1-C6 alkyl)2, —S(O)2N(C1-C6 alkyl)2, —N(C1-C6 alkyl)S(O)2R5, —S(O)2(C1-C6 alkyl), —(C1-C6 alkyl)S(O)2R5, —C(O)C1-C6 alkyl, —CO2C1-C6 alkyl, —N(C1-C6 alkyl)S(O)2C1-C6 alkyl, and —(CHR5)nNR3R4, wherein each alkyl, alkenyl, cycloalkenyl, alkynyl, cycloalkyl, heterocyclyl, aryl, or heteroaryl is optionally substituted with one or more substituents selected from the group consisting of —OH, halogen, —NO2, oxo, —CN, —R5, —OR3, —NHR3, NR3R4, —S(O)2N(R3)2, —S(O)2R5, —C(O)R5, —CO2R5, —NR3S(O)2R5, —S(O)R5, —S(O)NR3R4, —NR3S(O)R5, heterocycle, aryl, and heteroaryl containing 1 to 5 heteroatoms selected from the group consisting of N, S, P, and O;
• R1′ and R2′ are independently, and at each occurrence, selected from the group consisting of H, aryl, and heteroaryl containing 1 to 5 heteroatoms selected from the group consisting of N, S, P, and O, wherein each aryl or heteroaryl is optionally substituted with one or more substituents selected from the group consisting of —OH, halogen, —NO2, oxo, —CN, —R3, —R5, —OR3, —NHR3, —NR3R4, —S(O)2N(R3)2, —S(O)2R5, —C(O)R5, —CO2R5, —NR3S(O)2R5, —S(O)R5, —S(O)NR3R4, —NR3S(O)R5, heterocycle, aryl, and heteroaryl containing 1 to 5 heteroatoms selected from the group consisting of N, S, P, and O, wherein at least one of R1′ or R2′ is not H;
• R3 and R4 are independently, and at each occurrence, selected from the group consisting of —H, —C1-C6 alkyl, —C2-C6 alkenyl, —C4-C8 cycloalkenyl, —C2-C6 alkynyl, —C3-C8 cycloalkyl, heterocyclyl, aryl, heteroaryl containing 1 to 5 heteroatoms selected from the group consisting of N, S, P, and O, —S(O)2N(C1-C6 alkyl)2, —S(O)2(C1-C6 alkyl), —(C1-C6 alkyl)S(O)2R5, —C(O)C1-C6 alkyl, —CO2C1-C6 alkyl, and —(CHR5)nN(C1-C6 alkyl)2, wherein each alkyl, alkenyl, cycloalkenyl, alkynyl, cycloalkyl, heterocyclyl, aryl, or heteroaryl is optionally substituted with one or more substituents selected from the group consisting of —OH, halogen, —NO2, oxo, —CN, —R5, —O(C1-C6) alkyl, —NH(C1-C6) alkyl, —N(C1-C6 alkyl)2, —S(O)2N(C1-C6 alkyl)2, —S(O)2NHC1-C6 alkyl, —C(O)C1-C6 alkyl, —CO2C1-C6 alkyl, —N(C1-C6 alkyl)S(O)2C1-C6 alkyl, —S(O)R5, —S(O)N(C1-C6 alkyl)2, —N(C1-C6 alkyl)S(O)R5, heterocycle, aryl, and heteroaryl containing 1 to 5 heteroatoms selected from the group consisting of N, S, P, and O;
• or R3 and R can combine with the nitrogen atom to which they are attached to form a heterocycle or heteroaryl containing 1 to 5 heteroatoms selected from the group consisting of N, S, P, and O, wherein each heterocycle or heteroaryl is optionally substituted with —R4, —OR4, or —NR4R5;
• R5 is independently, and at each occurrence, selected from the group consisting of —H, —C1-C6 alkyl, —C2-C6 alkenyl, —C4-C8 cycloalkenyl, —C2-C6 alkynyl, —C3-C8 cycloalkyl, heterocyclyl, aryl, heteroaryl containing 1 to 5 heteroatoms selected from the group consisting of N, S, P, and O, —OH, halogen, —NO2, —CN, —NHC1-C6 alkyl, —N(C1-C6 alkyl)2, —S(O)2NH(C1-C6 alkyl), —S(O)2N(C1-C6 alkyl)2, —S(O)2C1-C6 alkyl, —C(O)C1-C6 alkyl, —CO2C1-C6 alkyl, —N(C1-C6 alkyl)SO2C1-C6 alkyl, —S(O)(C1-C6 alkyl), —S(O)N(C1-C6 alkyl)2, —N(C1-C6 alkyl)S(O)(C1-C6 alkyl), and —(CH2)nN(C1-C6 alkyl)2;
• and
• each n is independently and at each occurrence an integer from 0 to 6.