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

1. A compound of Formula I:

or a pharmaceutically acceptable salt thereof, wherein:

X 1 is O;

X 2 and X 4 are each CR 1 R 2 ;

X 3 is CR 1′ R 2′ ;

Y 1 and Y 4 are not bonded to C(O)NHOH and are each CR 1 ;

Y 2 and Y 3 are each CR 1 when not bonded to C(O)NHOH and Y 2 and Y 3 are C when bonded to —C(O)NHOH;

L is selected from the group consisting of a bond, —(CR 1 R 2 ) n —, —C(O)O—, —C(O)NR 3 —, —S(O) 2 —, —S(O) 2 NR 3 —, —S(O)—, and —S(O)NR 3 —, wherein L is bound to the ring nitrogen through the carbonyl or sulfonyl group;

R is independently selected from the group consisting of —H, —C 1 -C 6 alkyl, —C 2 -C 6 alkenyl, —C 4 -C 8 cycloalkenyl, —C 2 -C 6 alkynyl, —C 3 -C 8 cycloalkyl, —C 5 -C 12 spirocycle, heterocyclyl, spiroheterocyclyl, aryl, and heteroaryl containing 1-5 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, —NO 2 , —CN, —R 1 , —R 2 , —OR 3 , —NHR 3 , —NR 3 R 4 , —S(O) 2 NR 3 R 4 , —S(O) 2 R 1 , —C(O)R 1 , —CO 2 R 1 , —NR 3 S(O) 2 R 1 , —S(O)R 1 , —S(O)NR 3 R 4 , —NR 3 S(O)R 1 , heterocycle, aryl, and heteroaryl containing 1-5 heteroatoms selected from the group consisting of N, S, P, and O;

each R 1 and R 2 are independently, and at each occurrence, selected from the group consisting of —H, —R 3 , —R 4 , —C 1 -C 6 alkyl, —C 2 -C 6 alkenyl, —C 4 -C 8 cycloalkenyl, —C 2 -C 6 alkynyl, —C 3 -C 8 cycloalkyl, heterocyclyl, aryl, heteroaryl containing 1-5 heteroatoms selected from the group consisting of N, S, P, and O, —OH, halogen, —NO 2 , —CN, —NHC 1 -C 6 alkyl, —N(C 1 -C 6 alkyl) 2 , —S(O) 2 N(C 1 -C 6 alkyl) 2 , —N(C 1 -C 6 alkyl)S(O) 2 R 5 , —S(O) 2 (C 1 -C 6 alkyl), —(C 1 -C 6 alkyl)S(O) 2 R 5 , —C(O)C 1 -C 6 alkyl, —CO 2 C 1 -C 6 alkyl, —N(C 1 -C 6 alkyl)S(O) 2 C 1 -C 6 alkyl, and —(CHR 5 )—NR 3 R 4 , 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, —NO 2 , oxo, —CN, —R 5 , —OR 3 , —NHR 3 , —NR 3 R 4 , —S(O) 2 N(R 3 ) 2 , —S(O) 2 R 5 , —C(O)R 5 , —CO 2 R 5 , —NR 3 S(O) 2 R 5 , —S(O)R 5 , —S(O)NR 3 R 4 , —NR 3 S(O)R 5 , heterocycle, aryl, and heteroaryl containing 1-5 heteroatoms selected from the group consisting of N, S, P, and O;

R 1′ and R 2′ are independently, and at each occurrence, selected from the group consisting of —H, —C 1 -C 6 alkyl, —C 2 -C 6 alkenyl, —C 4 -C 8 cycloalkenyl, —C 2 -C 6 alkynyl, —C 3 -C 8 cycloalkyl, heterocyclyl, —OH, halogen, —NO 2 , —CN, —NHC 1 -C 6 alkyl, —N(C 1 -C 6 alkyl) 2 , —S(O) 2 N(C 1 -C 6 alkyl) 2 , —N(C 1 -C 6 alkyl)S(O) 2 R 5 , —S(O) 2 (C 1 -C 6 alkyl), —(C 1 -C 6 alkyl)S(O) 2 R 5 , —C(O)C 1 -C 6 alkyl, —CO 2 C 1 -C 6 alkyl, —N(C 1 -C 6 alkyl)S(O) 2 C 1 -C 6 alkyl, and —(CHR 5 )—NR 3 R 4 , wherein each alkyl, alkenyl, cycloalkenyl, alkynyl, cycloalkyl, or heterocyclyl is optionally substituted with one or more substituents selected from the group consisting of —OH, halogen, —NO 2 , oxo, —CN, —R 5 , —OR 3 , —NHR 3 , —NR 3 R 4 , —S(O) 2 N(R 3 ) 2 , —S(O) 2 R 5 , —C(O)R 5 , —CO 2 R 5 , —NR 3 S(O) 2 R 5 , —S(O)R 5 , —S(O)NR 3 R 4 , —NR 3 S(O)R 5 , heterocycle, aryl, and heteroaryl containing 1-5 heteroatoms selected from the group consisting of N, S, P, and O;

R 3 and R 4 are independently, at each occurrence, selected from the group consisting of —H, —C 1 -C 6 alkyl, —C 2 -C 6 alkenyl, —C 4 -C 8 cycloalkenyl, —C 2 -C 6 alkynyl, —C 3 -C 8 cycloalkyl, heterocyclyl, aryl, heteroaryl containing 1-5 heteroatoms selected from the group consisting of N, S, P, and O, —S(O) 2 N(C 1 -C 6 alkyl) 2 , —S(O) 2 (C 1 -C 6 alkyl), —(C 1 -C 6 alkyl)S(O) 2 R 5 , —C(O)C 1 -C 6 alkyl, —CO 2 C 1 -C 6 alkyl, and —(CHR 5 )—N(C 1 -C 6 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, —NO 2 , oxo, —CN, —R 5 , —O(C 1 -C 6 alkyl), —NH(C 1 -C 6 alkyl), —N(C 1 -C 6 alkyl) 2 , —S(O) 2 N(C 1 -C 6 alkyl) 2 , —S(O) 2 NH(C 1 -C 6 alkyl), —C(O)C 1 -C 6 alkyl, —CO 2 C 1 -C 6 alkyl, —N(C 1 -C 6 alkyl)S(O) 2 C 1 -C 6 alkyl, —S(O)R 5 , —S(O)N(C 1 -C 6 alkyl) 2 , —N(C 1 -C 6 alkyl)S(O)R 5 , heterocycle, aryl, and heteroaryl containing 1-5 heteroatoms selected from the group consisting of N, S, P, and O;

or R 3 and R can combine with the nitrogen atom to which they are attached to form a heterocycle, wherein each heterocycle is optionally substituted by —R 1 , —R 2 , —R 4 , —OR 4 , or —NR 4 R 5 ;

R 5 is independently, and at each occurrence, selected from the group consisting of —H, —C 1 -C 6 alkyl, —C 2 -C 6 alkenyl, —C 4 -C 8 cycloalkenyl, —C 2 -C 6 alkynyl, —C 3 -C 8 cycloalkyl, heterocyclyl, aryl, heteroaryl containing 1-5 heteroatoms selected from the group consisting of N, S, P, and O, —OH, halogen, —NO 2 , —CN, —NHC 1 -C 6 alkyl, —N(C 1 -C 6 alkyl) 2 , —S(O) 2 NH(C 1 -C 6 alkyl), —S(O) 2 N(C 1 -C 6 alkyl) 2 , —S(O) 2 C 1 -C 6 alkyl, —C(O)C 1 -C 6 alkyl, —CO 2 C 1 -C 6 alkyl, —N(C 1 -C 6 alkyl)SO 2 C 1 -C 6 alkyl, —S(O)(C 1 -C 6 alkyl), —S(O)N(C 1 -C 6 alkyl) 2 , —N(C 1 -C 6 alkyl)S(O)(C 1 -C 6 alkyl), and —(CH 2 ) n N(C 1 -C 6 alkyl) 2 ; and

n is independently, and at each occurrence, an integer from 0 to 6.

2. The compound of claim 1 , wherein the compound is of the Formula IA:

or a pharmaceutically acceptable salt thereof.

3. The compound of claim 1 , wherein the compound is of the Formula IB

or a pharmaceutically acceptable salt thereof.

4. The compound of claim 1 selected from the group consisting of:

4-(benzo[d]oxazol-2-yl)-N-hydroxy-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

4-(1-(cyclohexylmethyl)-1H-benzo[d]imidazol-2-yl)-N-hydroxy-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

4-(benzo[d]thiazol-2-yl)-N-hydroxy-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

4-(cyclohexylmethyl)-N-hydroxy-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

N-hydroxy-4-phenyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

4-(4-cyano-3-(trifluoromethyl)phenyl)-N-hydroxy-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

4-(3,4-dichlorophenyl)-N-hydroxy-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

N-hydroxy-4-(pyridin-2-yl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

N-hydroxy-4-(pyridin-3-yl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

N-hydroxy-4-(pyridin-4-yl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

N-hydroxy-4-(p-tolyl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

N-hydroxy-4-(piperidine-1-carbonyl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

4-methoxyphenyl 8-(hydroxycarbamoyl)-2,3-dihydrobenzo[f][1,4]oxazepine-4(5H)-carboxylate;

cyclohexyl 8-(hydroxycarbamoyl)-2,3-dihydrobenzo[f][1,4]oxazepine-4(5H)-carboxylate;

N-hydroxy-4-(piperidin-1-ylsulfonyl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

N8-hydroxy-N4-methyl-N4-phenyl-2,3-dihydrobenzo[f][1,4]oxazepine-4,8(5H)-dicarboxamide;

4-cyclohexyl-N-hydroxy-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

4-(2-(dimethylamino)ethyl)-N-hydroxy-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

N-hydroxy-4-(2-methoxyethyl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

N-hydroxy-4-(1-((tetrahydro-2H-pyran-4-yl)methyl)-1H-benzo[d]imidazol-2-yl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

N-hydroxy-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

N-hydroxy-4-methyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(R)—N-hydroxy-2-methyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(R)—N8-hydroxy-N4-(4-methoxyphenyl)-2-methyl-2,3-dihydrobenzo[f][1,4]oxazepine-4,8(5H)-dicarboxamide;

(R)—N-hydroxy-4-((4-methoxyphenyl)sulfonyl)-2-methyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(R)—N-hydroxy-4-(4-methoxybenzyl)-2-methyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(R)—N-hydroxy-2-methyl-4-phenyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(R)—N-hydroxy-2,4-dimethyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)—N-hydroxy-2-methyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)—N8-hydroxy-N4-(4-methoxyphenyl)-2-methyl-2,3-dihydrobenzo[f][1,4]oxazepine-4,8(5H)-dicarboxamide;

(S)—N-hydroxy-4-((4-methoxyphenyl)sulfonyl)-2-methyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)—N-hydroxy-2-methyl-4-phenyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)—N-hydroxy-2,4-dimethyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)—N-hydroxy-4-(4-methoxybenzyl)-2-methyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

N-hydroxy-4-(4-methoxybenzyl)-3,3-dimethyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

N-hydroxy-3,3-dimethyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

N-hydroxy-3,3,4-trimethyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(R)—N-hydroxy-3-isopropyl-4-(4-methoxybenzyl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(R)—N-hydroxy-3-isopropyl-4-phenyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(R)—N8-hydroxy-3-isopropyl-N4-(4-methoxyphenyl)-2,3-dihydrobenzo[f][1,4]oxazepine-4,8(5H)-dicarboxamide;

(R)—N-hydroxy-3-isopropyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(R)—N-hydroxy-3-isopropyl-4-methyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)—N-hydroxy-3-isopropyl-4-(4-methoxybenzyl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)—N-hydroxy-3-isopropyl-4-phenyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)—N8-hydroxy-3-isopropyl-N4-(4-methoxyphenyl)-2,3-dihydrobenzo[f][1,4]oxazepine-4,8(5H)-dicarboxamide;

(S)—N-hydroxy-3-isopropyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)—N-hydroxy-3-isopropyl-4-methyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(R)—N-hydroxy-3-methyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(R)—N-hydroxy-3,4-dimethyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(R)—N8-hydroxy-N4-(4-methoxyphenyl)-3-methyl-2,3-dihydrobenzo[f][1,4]oxazepine-4,8(5H)-dicarboxamide;

(R)—N-hydroxy-4-((4-methoxyphenyl)sulfonyl)-3-methyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(R)—N-hydroxy-4-(4-methoxybenzyl)-3-methyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(R)—N-hydroxy-3-methyl-4-phenyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)—N8-hydroxy-N4-(4-methoxyphenyl)-3-methyl-2,3-dihydrobenzo[f][1,4]oxazepine-4,8(5H)-dicarboxamide;

(S)—N-hydroxy-4-((4-methoxyphenyl)sulfonyl)-3-methyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)—N-hydroxy-4-(4-methoxybenzyl)-3-methyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)—N-hydroxy-3-methyl-4-phenyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)—N-hydroxy-3-methyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)—N-hydroxy-3,4-dimethyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(R)—N-hydroxy-4-(4-methoxybenzyl)-5-methyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-7-carboxamide;

(S)—N-hydroxy-4-(4-methoxybenzyl)-5-methyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-7-carboxamide;

N8-hydroxy-N4-(4-methoxyphenyl)-2,3-dihydrobenzo[f][1,4]oxazepine-4,8(5H)-dicarboxamide;

N7-hydroxy-N4-(4-methoxyphenyl)-2,3-dihydrobenzo[f][1,4]oxazepine-4,7(5H)-dicarboxamide;

N-hydroxy-4-((4-methoxyphenyl)sulfonyl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

N-hydroxy-4-((4-methoxyphenyl)sulfonyl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-7-carboxamide;

4-((1H-benzo[d]imidazol-2-yl)methyl)-N-hydroxy-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

4-((1H-benzo[d]imidazol-2-yl)methyl)-N-hydroxy-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-7-carboxamide;

N-hydroxy-4-((1-(2-methoxyethyl)-1H-benzo[d]imidazol-2-yl)methyl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

N-hydroxy-4-((1-(2-methoxyethyl)-1H-benzo[d]imidazol-2-yl)methyl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-7-carboxamide;

N-hydroxy-4-(4-methoxyphenethyl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

N-hydroxy-4-(4-methoxyphenethyl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-7-carboxamide;

N-hydroxy-4-(4-methoxybenzyl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

N-hydroxy-4-(4-methoxybenzyl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-7-carboxamide;

4-(1H-benzo[d]imidazol-2-yl)-N-hydroxy-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

4-(1H-benzo[d]imidazol-2-yl)-N-hydroxy-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-7-carboxamide;

N-hydroxy-4-(1-(2-methoxyethyl)-1H-benzo[d]imidazol-2-yl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

N-hydroxy-4-(1-(2-methoxyethyl)-1H-benzo[d]imidazol-2-yl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-7-carboxamide;

N-hydroxy-4-((6-methoxypyridin-3-yl)methyl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

N-hydroxy-4-((6-methoxypyridin-3-yl)methyl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-7-carboxamide;

N-hydroxy-4-((5-methoxypyridin-2-yl)methyl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

N-hydroxy-4-((5-methoxypyridin-2-yl)methyl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-7-carboxamide;

(R)—N8-hydroxy-2-isopropyl-N4-(4-methoxyphenyl)-2,3-dihydrobenzo[f][1,4]oxazepine-4,8(5H)-dicarboxamide;

(R)—N8-hydroxy-2-(methoxymethyl)-N4-(4-methoxyphenyl)-2,3-dihydrobenzo[f][1,4]oxazepine-4,8(5H)-dicarboxamide;

(S)—N8-hydroxy-2-(methoxymethyl)-N4-(4-methoxyphenyl)-2,3-dihydrobenzo[f][1,4]oxazepine-4,8(5H)-dicarboxamide;

(R)—N8-hydroxy-N4-(4-methoxyphenyl)-2-phenyl-2,3-dihydrobenzo[f][1,4]oxazepine-4,8(5H)-dicarboxamide;

(S)—N8-hydroxy-N4-(4-methoxyphenyl)-2-phenyl-2,3-dihydrobenzo[f][1,4]oxazepine-4,8(5H)-dicarboxamide;

(S)-3-ethyl-N-hydroxy-4-methyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)-3-ethyl-N-hydroxy-4-(4-methoxybenzyl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)-3-ethyl-N-hydroxy-4-phenyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)-3-ethyl-N-hydroxy-4-(o-tolyl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)—N-hydroxy-3-isopropyl-4-(pyridin-3-yl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)—N-hydroxy-3-isopropyl-4-(pyridin-2-yl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)—N-hydroxy-3-isopropyl-4-(pyridin-4-yl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)—N-hydroxy-3-methyl-4-(o-tolyl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)—N-hydroxy-4-(2-methoxyphenyl)-3-methyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)—N-hydroxy-3-methyl-4-(pyridin-2-yl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)—N-hydroxy-3-methyl-4-(pyrrolidine-1-carbonyl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)—N-hydroxy-3-methyl-4-(morpholine-4-carbonyl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)—N-hydroxy-4-(isoindoline-2-carbonyl)-3-methyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)—N-hydroxy-4-(4-methoxypiperidine-1-carbonyl)-3-methyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)—N-hydroxy-3-methyl-4-(4-methylpiperazine-1-carbonyl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(3S)—N-hydroxy-3-methyl-4-(2-methylpiperidine-1-carbonyl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(3S)—N-hydroxy-3-methyl-4-(3-methylmorpholine-4-carbonyl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)—N-hydroxy-3-methyl-4-(oxetan-3-ylmethyl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)-4-(4-fluorophenyl)-N-hydroxy-3-methyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)-4-(3-fluorophenyl)-N-hydroxy-3-methyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)—N-hydroxy-3-methyl-4-(4-(trifluoromethyl)phenyl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

methyl (S)-8-(hydroxycarbamoyl)-3-methyl-2,3-dihydrobenzo[f][1,4]oxazepine-4(5H)-carboxylate;

isopropyl (S)-8-(hydroxycarbamoyl)-3-methyl-2,3-dihydrobenzo[f][1,4]oxazepine-4(5H)-carboxylate;

(S)—N-hydroxy-3-methyl-4-(methylsulfonyl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)-4-(ethylsulfonyl)-N-hydroxy-3-methyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)—N8-hydroxy-N4,N4,3-trimethyl-2,3-dihydrobenzo[f][1,4]oxazepine-4,8(5H)-dicarboxamide;

(S)—N-hydroxy-4-((2-methoxyethyl)sulfonyl)-3-methyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)—N8-hydroxy-N4-(2-methoxyethyl)-3-methyl-2,3-dihydrobenzo[f][1,4]oxazepine-4,8(5H)-dicarboxamide;

(S)—N8-hydroxy-3-methyl-N4-phenyl-2,3-dihydrobenzo[f][1,4]oxazepine-4,8(5H)-dicarboxamide;

(S)—N-hydroxy-3-methyl-4-(piperidine-1-carbonyl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)—N8-hydroxy-N4-(2-methoxyethyl)-N4,3-dimethyl-2,3-dihydrobenzo[f][1,4]oxazepine-4,8(5H)-dicarboxamide;

(S)—N-hydroxy-3-methyl-4-(pyridin-3-yl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)—N-hydroxy-3-methyl-4-(pyridin-4-yl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)—N-hydroxy-4-(3-methoxypropyl)-3-methyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(3S)-4-(1-(4-fluorophenyl)ethyl)-N-hydroxy-3-methyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)—N-hydroxy-3-methyl-4-(3-morpholinopropyl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(3S)—N-hydroxy-3-methyl-4-(2-(tetrahydrofuran-2-yl)ethyl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)-4-ethyl-N-hydroxy-3-methyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)—N-hydroxy-4-isopropyl-3-methyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)—N-hydroxy-4-isobutyl-3-methyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)-4-(cyclobutylmethyl)-N-hydroxy-3-methyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)-4-(cyclopropylmethyl)-N-hydroxy-3-methyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)-4-(4-fluorobenzyl)-N-hydroxy-3-methyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)-4-(cyclohexylmethyl)-N-hydroxy-3-methyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)—N-hydroxy-3-methyl-4-(2-morpholinoethyl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)—N-hydroxy-4-(2-methoxyethyl)-3-methyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)-4-(cyclopentylmethyl)-N-hydroxy-3-methyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(3S)—N-hydroxy-3-methyl-4-((tetrahydrofuran-2-yl)methyl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)-4-cyclopentyl-N-hydroxy-3-methyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)-4-((4-fluorophenyl)sulfonyl)-N-hydroxy-3-methyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

cyclopentyl (S)-8-(hydroxycarbamoyl)-3-methyl-2,3-dihydrobenzo[f][1,4]oxazepine-4(5H)-carboxylate;

cyclohexyl (S)-8-(hydroxycarbamoyl)-3-methyl-2,3-dihydrobenzo[f][1,4]oxazepine-4(5H)-carboxylate;

(S)—N8-hydroxy-N4,3-dimethyl-N4-phenyl-2,3-dihydrobenzo[f][1,4]oxazepine-4,8(5H)-dicarboxamide;

ethyl (S)-8-(hydroxycarbamoyl)-3-methyl-2,3-dihydrobenzo[f][1,4]oxazepine-4(5H)-carboxylate;

cyclobutyl (S)-8-(hydroxycarbamoyl)-3-methyl-2,3-dihydrobenzo[f][1,4]oxazepine-4(5H)-carboxylate;

tetrahydro-2H-pyran-4-yl (S)-8-(hydroxycarbamoyl)-3-methyl-2,3-dihydrobenzo[f][1,4]oxazepine-4(5H)-carboxylate;

4-fluorophenyl (S)-8-(hydroxycarbamoyl)-3-methyl-2,3-dihydrobenzo[f][1,4]oxazepine-4(5H)-carboxylate;

(S)—N-hydroxy-3-methyl-4-(oxetan-3-yl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(R)—N-hydroxy-3-(methoxymethyl)-4-methyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(R)—N-hydroxy-4-(4-methoxybenzyl)-3-(methoxymethyl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(R)—N-hydroxy-3-(methoxymethyl)-4-phenyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(R)—N-hydroxy-3-(methoxymethyl)-4-(o-tolyl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)—N-hydroxy-3-(methoxymethyl)-4-methyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)—N-hydroxy-4-(4-methoxybenzyl)-3-(methoxymethyl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)—N-hydroxy-3-(methoxymethyl)-4-phenyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)—N-hydroxy-3-(methoxymethyl)-4-(o-tolyl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamid;

N-hydroxy-4-(pyrrolidine-1-carbonyl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

N-hydroxy-4-(morpholine-4-carbonyl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

N-hydroxy-4-(4-methylpiperazine-1-carbonyl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

N-hydroxy-4-(4-methoxypiperidine-1-carbonyl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

N-hydroxy-4-(isoindoline-2-carbonyl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

N-hydroxy-4-(2-methylpiperidine-1-carbonyl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

N-hydroxy-4-(3-methylmorpholine-4-carbonyl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(R)—N-hydroxy-4-(4-methoxybenzyl)-5-methyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)—N-hydroxy-4-(4-methoxybenzyl)-5-methyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)—N-hydroxy-3-methyl-4-(3-(trifluoromethyl)phenyl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)—N-hydroxy-3-methyl-4-(4-(trifluoromethoxy)phenyl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)-4-(4-chlorophenyl)-N-hydroxy-3-methyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)-4-(2-chlorophenyl)-N-hydroxy-3-methyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)-4-(2-fluorophenyl)-N-hydroxy-3-methyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)-4-(azetidine-1-carbonyl)-N-hydroxy-3-methyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)—N-hydroxy-4-(3-methoxyazetidine-1-carbonyl)-3-methyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(3S)—N-hydroxy-4-(3-methoxypyrrolidine-1-carbonyl)-3-methyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)—N8-hydroxy-3-methyl-N4-(pyridin-3-yl)-2,3-dihydrobenzo[f][1,4]oxazepine-4,8(5H)-dicarboxamide;

(S)—N4-cyclohexyl-N8-hydroxy-3-methyl-2,3-dihydrobenzo[f][1,4]oxazepine-4,8(5H)-dicarboxamide;

(S)—N8-hydroxy-3-methyl-N4-(pyridin-2-yl)-2,3-dihydrobenzo[f][1,4]oxazepine-4,8(5H)-dicarboxamide;

(S)—N8-hydroxy-3-methyl-N4-(tetrahydro-2H-pyran-4-yl)-2,3-dihydrobenzo[f][1,4]oxazepine-4,8(5H)-dicarboxamide;

(S)—N8-hydroxy-N4,3-dimethyl-N4-(tetrahydro-2H-pyran-4-yl)-2,3-dihydrobenzo[f][1,4]oxazepine-4,8(5H)-dicarboxamide;

(S)—N8-hydroxy-3-methyl-N4-(pyridin-4-yl)-2,3-dihydrobenzo[f][1,4]oxazepine-4,8(5H)-dicarboxamide;

(S)-4-((1R,5R)-8-oxa-3-azabicyclo[3.2.1]octane-3-carbonyl)-N-hydroxy-3-methyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)-4-((1S,5S)-8-oxa-3-azabicyclo[3.2.1]octane-3-carbonyl)-N-hydroxy-3-methyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(S)-4-(3,4-dihydro-2H-benzo[b][1,4]oxazine-4-carbonyl)-N-hydroxy-3-methyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide; and

(S)-3-benzyl-N-hydroxy-4-(morpholine-4-carbonyl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide.

5. The compound of claim 1 , selected from the group consisting of:

N8-hydroxy-N4-(tetrahydro-2H-pyran-4-yl)-N4-(3-(trifluoromethyl)phenyl)-2,3-dihydrobenzo[f][1,4]oxazepine-4,8(5H)-dicarboxamide;

(R)—N-hydroxy-4-(morpholine-4-carbonyl)-3-((trifluoromethoxy)methyl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide;

(3S)—N-hydroxy-3,5-dimethyl-4-(morpholine-4-carbonyl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide; and

(S)-6-fluoro-N-hydroxy-3-methyl-4-(morpholine-4-carbonyl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide.

6. A pharmaceutical composition comprising a compound of claim 1 and a pharmaceutically acceptable carrier.

7. The compound of claim 1 , wherein the compound is cyclohexyl 8-(hydroxycarbamoyl)-2,3-dihydrobenzo[f][1,4]oxazepine-4(5H)-carboxylate.

8. The compound of claim 1 , wherein the compound is 4-(cyclohexylmethyl)-N-hydroxy-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide.

9. The compound of claim 1 , wherein the compound is (S)—N-hydroxy-3-methyl-4-((tetrahydrofuran-2-yl)methyl)-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide.

10. A pharmaceutical composition comprising the compound of claim 7 , and a pharmaceutically acceptable carrier.

11. A pharmaceutical composition comprising the compound of claim 8 , and a pharmaceutically acceptable carrier.

12. A pharmaceutical composition comprising the compound of claim 9 , and a pharmaceutically acceptable carrier.

13. The compound of claim 2 , wherein the compound is of Formula IA-1a, Formula IA-1b, Formula IA-1c, Formula IA-1d, Formula IA-1e, or Formula IA-1f:

14. The compound of claim 1 , wherein at least one of R 1′ and R 2′ is —H.

15. The compound of claim 14 , wherein one of R 1′ and R 2′ is —C 1 -C 6 alkyl, and the other of R 1′ and R 2′ is —H.

16. The compound of claim 1 , wherein L is —C(O)NR 3 —.

17. The compound of claim 16 , wherein R is an optionally substituted group selected from the group consisting of —C 1 -C 6 alkyl, —C 3 -C 8 cycloalkyl, heterocyclyl, aryl, and heteroaryl.

18. The compound of claim 16 , wherein R 3 and R combine with the nitrogen atom to which they are attached to form an optionally substituted heterocycle.

19. The compound of claim 18 , wherein R 3 and R combine with the nitrogen atom to which they are attached to form a heterocycle substituted with —OR 4 , —NR 4 R 5 , or —C 1 -C 6 alkyl.

20. The compound of claim 1 , wherein Lisa bond.

21. The compound of claim 20 , wherein R is an optionally substituted group selected from the group consisting of —C 1 -C 6 alkyl, —C 3 -C 8 cycloalkyl, heterocyclyl, aryl, and heteroaryl.

22. The compound of claim 21 , wherein R is —C 1 -C 6 alkyl substituted with an optionally substituted group selected from the group consisting of aryl, heteroaryl, and —C 3 -C 8 cycloalkyl.

23. The compound of claim 1 , wherein L is —(CR 1 R 2 ) n —, —C(O)O—, or —S(O) 2 —.

24. The compound of claim 23 , wherein R is an optionally substituted group selected from the group consisting of —C 1 -C 6 alkyl, —C 3 -C 8 cycloalkyl, heterocyclyl, aryl, and heteroaryl.

25. The compound of claim 15 , wherein L is —C(O)NR 3 —.

26. The compound of claim 25 , wherein R 3 and R combine with the nitrogen atom to which they are attached to form an optionally substituted heterocycle.

27. The compound of claim 26 , wherein R 3 and R combine with the nitrogen atom to which they are attached to form a heterocycle substituted with —OR 4 , —NR 4 R 5 , or —C 1 -C 6 alkyl.

28. The compound of claim 27 , wherein R 3 and R combine with the nitrogen atom to which they are attached to form a piperidinyl ring.

29. The compound of claim 15 , wherein L is a bond.

30. The compound of claim 29 , wherein R is an optionally substituted group selected from the group consisting of —C 1 -C 6 alkyl, —C 3 -C 8 cycloalkyl, heterocyclyl, aryl, and heteroaryl.

31. The compound of claim 30 , wherein R is —C 1 -C 6 alkyl substituted with an optionally substituted group selected from the group consisting of aryl, heteroaryl, and —C 3 -C 8 cycloalkyl.

32. The compound of claim 14 , wherein one of R 1 and R 2 of CR 1 R 2 of X 4 is —C 1 -C 6 alkyl or aryl.

33. The compound of claim 32 , wherein L is —C(O)NR 3 —.

34. The compound of claim 33 , wherein R 3 and R combine with the nitrogen atom to which they are attached to form an optionally substituted heterocycle.

35. The compound of claim 32 , wherein Lisa bond.

36. The compound of claim 35 , wherein R is —C 1 -C 6 alkyl substituted with an optionally substituted group selected from the group consisting of aryl, heteroaryl, and —C 3 -C 8 cycloalkyl.

37. The compound of claim 1 , wherein the compound is (S)—N-hydroxy-4-(4-methoxypiperidine-1-carbonyl)-3-methyl-2,3,4,5-tetrahydrobenzo[f][1,4]oxazepine-8-carboxamide.

38. A pharmaceutical composition comprising the compound of claim 37 , and a pharmaceutically acceptable carrier.