PRMT5 inhibitors and uses thereof

1. A compound of Formula (I):

or a pharmaceutically acceptable salt thereof,

wherein

represents a single or double bond;

R 1 is hydrogen, R z , or —C(O)R z , wherein R z is optionally substituted C 1-6 alkyl;

L is —N(R)C(O)—, —C(O)N(R)—, —N(R)C(O)N(R)—, —N(R)C(O)O—, or —OC(O)N(R)—;

each R is independently hydrogen or optionally substituted C 1-6 aliphatic;

Ar is a monocyclic or bicyclic aromatic ring having 0-4 heteroatoms independently selected from nitrogen, oxygen, and sulfur, wherein Ar is substituted with 0, 1, 2, 3, 4, or 5 R y groups, as valency permits;

each R y is independently selected from the group consisting of halo, —CN, —NO 2 , optionally substituted aliphatic, optionally substituted carbocyclyl, optionally substituted aryl, optionally substituted heterocyclyl, optionally substituted heteroaryl, —OR A , —N(R B ) 2 , —SR A , —C(═O)R A , —C(O)OR A , —C(O)SR A , —C(O)N(R B ) 2 , —C(O)N(R B )N(R B ) 2 , —OC(O)R A , —OC(O)N(R B ) 2 , —NR B C(O)R A , —NR B C(O)N(R B ) 2 , —NR B C(O)N(R B )N(R B ) 2 , —NR B C(O)OR A , —SC(O)R A , —C(═NR B )R A , —C(═NNR B )R A , —C(═NOR A )R A , —C(═NR B )N(R B ) 2 , —NR B C(═NR B )R B , —C(═S)R A , —C(═S)N(R B ) 2 , —NR B C(═S)R A , —S(O)R A , —OS(O) 2 R A , —SO 2 R A , —NR B SO 2 R A , or —SO 2 N(R B ) 2 ;

each R A is independently selected from the group consisting of hydrogen, optionally substituted aliphatic, optionally substituted carbocyclyl, optionally substituted heterocyclyl, optionally substituted aryl, and optionally substituted heteroaryl;

each R B is independently selected from the group consisting of hydrogen, optionally substituted aliphatic, optionally substituted carbocyclyl, optionally substituted heterocyclyl, optionally substituted aryl, and optionally substituted heteroaryl, or two R B groups are taken together with their intervening atoms to form an optionally substituted heterocyclic ring;

R 5 , R 6 , R 7 , and R 8 are independently hydrogen, halo, or optionally substituted aliphatic;

each R x is independently selected from the group consisting of halo, —CN, optionally substituted aliphatic, —OR′, and —N(R″) 2 ;

R′ is hydrogen or optionally substituted aliphatic;

each R″ is independently hydrogen or optionally substituted aliphatic, or two R″ are taken together with their intervening atoms to form a heterocyclic ring; and

n is 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10, as valency permits;

wherein each instance of aliphatic is independently a nonaromatic hydrocarbon;

each instance of optionally substituted is independently unsubstituted or substituted, and each instance of substituted is, when on a carbon atom, halogen, —CN, —NO 2 , —N 3 , —SO 2 H, —SO 3 H, —OH, —OR aa , —ON(R bb ) 2 , —N(R bb ) 2 , —N(R bb ) 3 + X − , —N(OR cc )R bb , —SH, —SR aa , —SSR cc , —C(═O)R aa , —CO 2 H, —CHO, —C(OR cc ) 2 , —CO 2 R aa , —OC(═O)R aa , —OCO 2 R aa , —C(═O)N(R bb ) 2 , —OC(═O)N(R bb ) 2 , —NR bb C(═O)R aa , —NR bb CO 2 R aa , —NR bb C(═O)N(R bb ) 2 , —C(═NR bb )R aa , —C(═NR bb )OR aa , —OC(═NR bb )R aa , —OC(═NR bb )OR aa , —C(═NR bb )N(R bb ) 2 , —OC(═NR bb )N(R bb ) 2 , —NR bb C(═NR bb )N(R bb ) 2 , —C(═O)NR bb SO 2 R aa , —NR bb SO 2 R aa , —SO 2 N(R bb ) 2 , —SO 2 R aa , —SO 2 OR aa , —OSO 2 R aa , —S(═O)R aa , —OS(═O)R aa , —Si(R aa ) 3 , —OSi(R aa ) 3 —C(═S)N(R bb ) 2 , —C(═O)SR aa , —C(═S)SR aa , —SC(═S)SR aa , —SC(═O)SR aa , —OC(═O)SR aa , —SC(═O)OR aa , —SC(═O)R aa , —P(═O) 2 R aa , —OP(═O) 2 R aa , —P(═O)(R aa ) 2 , —OP(═O)(R aa ) 2 , —OP(═O)(OR cc ) 2 , —P(═O) 2 N(R bb ) 2 , —OP(═O) 2 N(R bb ) 2 , —P(═O)(NR bb ) 2 , —OP(═O)(NR bb ) 2 , —NR bb P(═O)(OR cc ) 2 , —NR bb P(═O)(NR bb ) 2 , —P(R cc ) 2 , —P(R cc ) 3 , —OP(R cc ) 2 , —OP(R cc ) 3 , —B(R aa ) 2 , —B(OR cc ) 2 , —BR aa (OR cc ), C 1-10 alkyl, C 1-10 perhaloalkyl, C 2-10 alkenyl, C 2-10 alkynyl, C 3-10 carbocyclyl, 3-14 membered heterocyclyl, C 6-14 aryl, and 5-14 membered heteroaryl, wherein each alkyl, alkenyl, alkynyl, carbocyclyl, heterocyclyl, aryl, and heteroaryl is independently substituted with 0, 1, 2, 3, 4, or 5 R dd groups;

or two geminal hydrogens on a carbon atom are replaced with the group ═O, ═S, ═NN(R bb ) 2 , ═NNR bb C(═O)R aa , ═NNR bb C(═O)OR aa , ═NNR bb S(═O) 2 R aa , ═NR bb , or ═NOR cc ;

each instance of substituted is, when on a nitrogen, independently hydrogen, —OH, —OR aa , —N(R cc ) 2 , —CN, —C(═O)R aa , —C(═O)N(R cc ) 2 , —CO 2 R aa , —SO 2 R aa , —C(═NR bb )R aa , —C(═NR cc )OR aa , —C(═NR cc )N(R cc ) 2 , —SO 2 N(R cc ) 2 , —SO 2 R cc , —SO 2 OR cc , —SOR aa , —C(═S)N(R cc ) 2 , —C(═O)SR cc , —C(═S)SR cc , —P(═O) 2 R aa , —P(═O)(R aa ) 2 , —P(═O) 2 N(R cc ) 2 , —P(═O)(NR cc ) 2 , C 1-10 alkyl, C 1-10 perhaloalkyl, C 2-10 alkenyl, C 2-10 alkynyl, C 3-10 carbocyclyl, 3-14 membered heterocyclyl, C 6-14 aryl, and 5-14 membered heteroaryl, or two R cc groups attached to a nitrogen atom are joined to form a 3-14 membered heterocyclyl or 5-14 membered heteroaryl ring, wherein each alkyl, alkenyl, alkynyl, carbocyclyl, heterocyclyl, aryl, and heteroaryl is independently substituted with 0, 1, 2, 3, 4, or 5 R dd groups;

each instance of R aa is, independently, selected from C 1-10 alkyl, C 1-10 perhaloalkyl, C 2-10 alkenyl, C 2-10 alkynyl, C 3-10 carbocyclyl, 3-14 membered heterocyclyl, C 6-14 aryl, and 5-14 membered heteroaryl, or two R aa groups are joined to form a 3-14 membered heterocyclyl or 5-14 membered heteroaryl ring, wherein each alkyl, alkenyl, alkynyl, carbocyclyl, heterocyclyl, aryl, and heteroaryl is independently substituted with 0, 1, 2, 3, 4, or 5 R dd groups;

each instance of R bb is, independently, selected from hydrogen, —OH, —OR aa , —N(R cc ) 2 , —CN, —C(═O)R aa , —C(═O)N(R cc ) 2 , —CO 2 R aa , —SO 2 R aa , —C(═NR cc )OR aa , —C(═NR cc )N(R cc ) 2 , —SO 2 N(R cc ) 2 , —SO 2 R cc , —SO 2 OR cc , —SOR aa , —C(═S)N(R cc ) 2 , —C(═O)SR cc , —C(═S)SR cc , —P(═O) 2 R aa , —P(═O)(R aa ) 2 , —P(═O) 2 N(R cc ) 2 , —P(═O)(NR cc ) 2 , C 1-10 alkyl, C 1-10 perhaloalkyl, C 2-10 alkenyl, C 2-10 alkynyl, C 3-10 carbocyclyl, 3-14 membered heterocyclyl, C 6-14 aryl, and 5-14 membered heteroaryl, or two R bb groups are joined to form a 3-14 membered heterocyclyl or 5-14 membered heteroaryl ring, wherein each alkyl, alkenyl, alkynyl, carbocyclyl, heterocyclyl, aryl, and heteroaryl is independently substituted with 0, 1, 2, 3, 4, or 5 R dd groups;

each instance of R cc is, independently, selected from hydrogen, C 1-10 alkyl, C 1-10 perhaloalkyl, C 2-10 alkenyl, C 2-10 alkynyl, C 3-10 carbocyclyl, 3-14 membered heterocyclyl, C 6-14 aryl, and 5-14 membered heteroaryl, or two R cc groups are joined to form a 3-14 membered heterocyclyl or 5-14 membered heteroaryl ring, wherein each alkyl, alkenyl, alkynyl, carbocyclyl, heterocyclyl, aryl, and heteroaryl is independently substituted with 0, 1, 2, 3, 4, or 5 R dd groups;

each instance of R dd is, independently, selected from halogen, —CN, —NO 2 , —N 3 , —SO 2 H, —SO 3 H, —OH, —OR ee , —ON(R ff ) 2 , —N(R ff ) 2 , —N(R ff ) 3 + X − , —N(OR ee )R ff , —SH, —SR ee , —SSR ee , —C(═O)R ee , —CO 2 H, —CO 2 R ee , —OC(═O)R ee , —OCO 2 R ee , —C(═O)N(R ff ) 2 , —OC(═O)N(R ff ) 2 , —NR ff C(═O)R ee , —NR ff CO 2 R ee , —NR ff C(═O)N(R ff ) 2 , —C(═NR ff )OR ee , —OC(═NR ff )R ee , —OC(═NR ff )OR ee , —C(═NR ff )N(R ff ) 2 , —OC(═NR ff )N(R ff ) 2 , —NR ff C(═NR ff )N(R ff ) 2 , NR ff SO 2 R ee , —SO 2 N(R ff ) 2 , —SO 2 R ee , —SO 2 OR ee , —OSO 2 R ee , —S(═O)R ee , —Si(R ee ) 3 , —OSi(R ee ) 3 , —C(═S)N(R ff ) 2 , —C(═O)SR ee , —C(═S)SR ee , —SC(═S)SR ee , —P(═O) 2 R ee , —P(═O)(R ee ) 2 , —OP(═O)(R ee ) 2 , —OP(═O)(OR ee ) 2 , C 1-6 alkyl, C 1-6 perhaloalkyl, C 2-6 alkenyl, C 2-6 alkynyl, C 3-10 carbocyclyl, 3-10 membered heterocyclyl, C 6-10 aryl, 5-10 membered heteroaryl, wherein each alkyl, alkenyl, alkynyl, carbocyclyl, heterocyclyl, aryl, and heteroaryl is independently substituted with 0, 1, 2, 3, 4, or 5 R gg groups, or two geminal R dd substituents can be joined to form ═O or ═S;

each instance of R ee is, independently, selected from C 1-6 alkyl, C 1-6 perhaloalkyl, C 2-6 alkenyl, C 2-6 alkynyl, C 3-10 carbocyclyl, C 6-10 aryl, 3-10 membered heterocyclyl, and 3-10 membered heteroaryl, wherein each alkyl, alkenyl, alkynyl, carbocyclyl, heterocyclyl, aryl, and heteroaryl is independently substituted with 0, 1, 2, 3, 4, or 5 R gg groups;

each instance of R ff is, independently, selected from hydrogen, C 1-6 alkyl, C 1-6 perhaloalkyl, C 2-6 alkenyl, C 2-6 alkynyl, C 3-10 carbocyclyl, 3-10 membered heterocyclyl, C 6-10 aryl and 5-10 membered heteroaryl, or two R ff groups are joined to form a 3-14 membered heterocyclyl or 5-14 membered heteroaryl ring, wherein each alkyl, alkenyl, alkynyl, carbocyclyl, heterocyclyl, aryl, and heteroaryl is independently substituted with 0, 1, 2, 3, 4, or 5 R gg groups; and

each instance of R gg is, independently, halogen, —CN, —NO 2 , —N 3 , —SO 2 H, —SO 3 H, —OH, —OC 1-6 alkyl, —ON(C 1-6 alkyl) 2 , —N(C 1-6 alkyl) 2 , —N(C 1-6 alkyl) 3 + X − , —NH(C 1-6 alkyl) 2 + X − , —NH 2 (C 1-6 alkyl) + X − , —NH 3 + X − , —N(OC 1-6 alkyl)(C 1-6 alkyl), —N(OH)(C 1-6 alkyl), —NH(OH), —SH, —SC 1-6 alkyl, —SS(C 1-6 alkyl), —C(═O)(C 1-6 alkyl), —CO 2 H, —CO 2 (C 1-6 alkyl), —OC(═O)(C 1-6 alkyl), —OCO 2 (C 1-6 alkyl), —C(═O)NH 2 , —C(═O)N(C 1-6 alkyl) 2 , —OC(═O)NH(C 1-6 alkyl), —NHC(═O)(C 1-6 alkyl), —N(C 1-6 alkyl)C(═O)(C 1-6 alkyl), —NHCO 2 (C 1-6 alkyl), —NHC(═O)N(C 1-6 alkyl) 2 , —NHC(═O)NH(C 1-6 alkyl), —NHC(═O)NH 2 , —C(═NH)O(C 1-6 alkyl), —OC(═NH)(C 1-6 alkyl), —OC(═NH)OC 1-6 alkyl, —C(═NH)N(C 1-6 alkyl) 2 , —C(═NH)NH(C 1-6 alkyl), —C(═NH)NH 2 , —OC(═NH)N(C 1-6 alkyl) 2 , —OC(NH)NH(C 1-6 alkyl), —OC(NH)NH 2 , —NHC(NH)N(C 1-6 alkyl) 2 , —NHC(═NH)NH 2 , —NHSO 2 (C 1-6 alkyl), —SO 2 N(C 1-6 alkyl) 2 , —SO 2 NH(C 1-6 alkyl), —SO 2 NH 2 , —SO 2 C 1-6 alkyl, —SO 2 OC 1-6 alkyl, —OSO 2 C 1-6 alkyl, —SOC 1-6 alkyl, —Si(C 1-6 alkyl) 3 , —OSi(C 1-6 alkyl) 3 -C(═S)N(C 1-6 alkyl) 2 , C(═S)NH(C 1-6 alkyl), C(═S)NH 2 , —C(═O)S(C 1-6 alkyl), —C(═S)SC 1-6 alkyl, —SC(═S)SC 1-6 alkyl, —P(═O) 2 (C 1-6 alkyl), —P(═O)(C 1-6 alkyl) 2 , —OP(═O)(C 1-6 alkyl) 2 , —OP(═O)(OC 1-6 alkyl) 2 , C 1-6 alkyl, C 1-6 perhaloalkyl, C 2-6 alkenyl, C 2-6 alkynyl, C 3-10 carbocyclyl, C 6-10 aryl, 3-10 membered heterocyclyl, 5-10 membered heteroaryl; or two geminal R gg substituents can be joined to form ═O or ═S; wherein X − is a counterion.

2. The compound of claim 1 , or a pharmaceutically acceptable salt thereof, wherein the compound is of Formula (I-a) or Formula (I-b):

or a pharmaceutically acceptable salt thereof.

3. The compound of claim 1 , or a pharmaceutically acceptable salt thereof, wherein the compound is of Formula (I′), Formula (I′-a), or Formula (I′-b):

or a pharmaceutically acceptable salt thereof.

4. The compound of claim 1 , or a pharmaceutically acceptable salt thereof, wherein L is —C(O)N(R)—, —NHC(O)NH—, or —OC(O)NH—.

5. The compound of claim 1 , or a pharmaceutically acceptable salt thereof, wherein the compound is of Formula (II), Formula (II-a), or Formula (II-b):

or a pharmaceutically acceptable salt thereof.

6. The compound of claim 1 , or a pharmaceutically acceptable salt thereof, wherein R 1 is hydrogen.

7. The compound of claim 1 , or a pharmaceutically acceptable salt thereof, wherein n is 0, 1, or 2.

8. The compound of claim 1 , or a pharmaceutically acceptable salt thereof, wherein Ar is phenyl or heteroaryl.

9. The compound of claim 8 , or a pharmaceutically acceptable salt thereof, wherein Ar is a 5- to 6-membered heteroaryl having 1-3 heteroatoms independently selected from nitrogen, oxygen, and sulfur.

10. The compound of claim 1 , or a pharmaceutically acceptable salt thereof, wherein Ar is unsubstituted or substituted with 1 or 2 R y groups.

11. The compound of claim 1 , or a pharmaceutically acceptable salt thereof, wherein the compound is of Formula (VI), Formula (VI-a), or Formula (VI-b):

or a pharmaceutically acceptable salt thereof.

12. The compound of claim 1 , or a pharmaceutically acceptable salt thereof, wherein the compound is of Formula (IX), Formula (IX-a), or Formula (IX-b):

or a pharmaceutically acceptable salt thereof.

13. The compound of claim 1 , or a pharmaceutically acceptable salt thereof, wherein the compound is of Formula (XV-a):

or a pharmaceutically acceptable salt thereof.

14. The compound of claim 1 , or a pharmaceutically acceptable salt thereof, wherein the compound is of Formula (XVII-a):

or a pharmaceutically acceptable salt thereof.

15. The compound of claim 1 , or a pharmaceutically acceptable salt thereof, wherein at least one R y is —NHR B .

16. The compound of claim 15 , or a pharmaceutically acceptable salt thereof, wherein R B is optionally substituted heterocyclyl.

17. The compound of claim 1 , or a pharmaceutically acceptable salt thereof, wherein Ar is selected from the group consisting of:

18. A pharmaceutical composition comprising a compound of claim 1 , or a pharmaceutically acceptable salt thereof, and a pharmaceutically acceptable excipient.

19. A method of inhibiting PRMT5, altering gene expression, or altering transcription, comprising contacting a cell with an effective amount of a compound of claim 1 , or a pharmaceutically acceptable salt thereof.

20. A method for the therapeutic treatment of a PRMT5-mediated disorder, comprising administering to a subject in need thereof a therapeutically effective amount of a compound of claim 1 , or a pharmaceutically acceptable salt thereof, wherein the PRMT5-mediated disorder is acute myelocytic leukemia (AML), myelodysplastic syndrome (MDS), or non-Hodgkin lymphoma (NHL).