Inhibitors of Bruton's tyrosine kinase

1. An irreversible inhibitor of a Bruton's tyrosine kinase (Btk) having the structure of Formula (A):

wherein:

A is independently selected from N;

R 1 is L 2 -(substituted or unsubstituted heteroaryl), or L 2 -(substituted or unsubstituted aryl), where L 2 is a bond, O, S, —S(═O), —S(═O) 2 , C(═O), -(substituted or unsubstituted C 1 -C 6 alkylene), or -(substituted or unsubstituted C 2 -C 6 alkenylene);

R 2 and R 3 are independently selected from H or lower alkyl;

R 4 is L 3 -X-L 4 -G, wherein,

L 3 is optional, and when present is a bond, optionally substituted or unsubstituted alkylene, optionally substituted or unsubstituted cycloalkylene, optionally substituted or unsubstituted alkenylene, or optionally substituted or unsubstituted alkynylene;

X is optional, and when present is a bond, O, —C(═O), S, —S(═O), —S(═O) 2 , —NH, —NR 9 , —NHC(O), —C(O)NH, —NR 9 C(O), —C(O)NR 9 , —S(═O) 2 NH, —NHS(═O) 2 , —S(═O) 2 NR 9 —, —NR 9 S(═O) 2 , —OC(O)NH—, —NHC(O)O—, —OC(O)NR 9 —, —NR 9 C(O)O—, —CH═NO—, —ON═CH—, —NR 10 C(O)NR 10 —, heteroarylene, arylene, —NR 10 C(═NR 11 )NR 10 —, —NR 10 C(═NR 11 )—, —C(═NR 11 )NR 10 —, —OC(═NR 11 )—, or —C(═NR 11 )O—;

L 4 is optional, and when present is a bond, substituted or unsubstituted alkylene, substituted or unsubstituted cycloalkylene, substituted or unsubstituted alkenylene, substituted or unsubstituted alkynylene, substituted or unsubstituted arylene, substituted or unsubstituted heteroarylene, or substituted or unsubstituted heterocyclene;

or L 3 , X and L 4 taken together form a nitrogen containing heterocyclic ring;

G is

 wherein,

R 6 , R 7 and R 8 are independently selected from among H, lower alkyl or substituted lower alkyl, lower heteroalkyl or substituted lower heteroalkyl, substituted or unsubstituted lower cycloalkyl, and substituted or unsubstituted lower heterocycloalkyl;

R 9 is selected from among H, substituted or unsubstituted lower alkyl, and substituted or unsubstituted lower cycloalkyl;

each R 10 is independently H, substituted or unsubstituted lower alkyl, or substituted or unsubstituted lower cycloalkyl; or

two R 10 groups can together form a 5-, 6-, 7-, or 8-membered heterocyclic ring; or

R 10 and R 11 can together form a 5-, 6-, 7-, or 8-membered heterocyclic ring; or

each R 11 is selected from H, —S(═O) 2 R 8 , —S(═O) 2 NH 2 , —C(O)R 8 , —CN, —NO 2 , heteroaryl, or heteroalkyl; or a pharmaceutically acceptable solvate, hydrate, or salt thereof, wherein the irreversible Btk inhibitor covalently bonds to cysteine 481 of Btk.

2. The Btk inhibitor of claim 1 , wherein the Btk inhibitor has the structure:

3. The Btk inhibitor of claim 1 , wherein R 1 is L 2 -substituted aryl; and L 2 is a bond.

4. The Btk inhibitor of claim 1 , wherein R 2 and R 3 are independently H.

5. The Btk inhibitor of claim 1 , wherein the compound of Formula (A) has the structure of Formula (B):

wherein:

Y is alkylene or substituted alkylene, or a 4-, 5-, or 6-membered cycloalkylene ring;

each R a is independently H, halogen, —CF 3 , —CN, —NO 2 , OH, NH 2 , -L a -(substituted or unsubstituted alkyl), -L a -(substituted or unsubstituted alkenyl), -L a -(substituted or unsubstituted heteroaryl), or -L a -(substituted or unsubstituted aryl), wherein L a is a bond, O, S, —S(═O), —S(═O) 2 , NH, C(O), CH 2 , —NHC(O)O, —NHC(O), or —C(O)NH;

G is

 wherein,

R 6 , R 7 and R 8 are independently selected from among H, lower alkyl or substituted lower alkyl, lower heteroalkyl or substituted lower heteroalkyl, substituted or unsubstituted lower cycloalkyl, and substituted or unsubstituted lower heterocycloalkyl;

R 12 is H or lower alkyl; or

Y and R 12 taken together form a 4-, 5-, or 6-membered heterocyclic ring; or a pharmaceutically acceptable solvate, hydrate, or salt thereof.

6. The Btk inhibitor of claim 5 , wherein Y and R 12 taken together form a 6-membered heterocyclic ring.

7. The Btk inhibitor of claim 5 , wherein the compound of Formula (B) has the structure of Formula (C):

Y is alkylene or substituted alkylene, or a 4-, 5-, or 6-membered cycloalkylene ring;

R 12 is H or lower alkyl; or

Y and R 12 taken together form a 4-, 5-, or 6-membered heterocyclic ring;

G is

 wherein,

R 6 , R 7 and R 8 are independently selected from among H, lower alkyl or substituted lower alkyl, lower heteroalkyl or substituted lower heteroalkyl, substituted or unsubstituted lower cycloalkyl, and substituted or unsubstituted lower heterocycloalkyl; or a pharmaceutically acceptable solvate, hydrate, or salt thereof.

8. The Btk inhibitor of claim 7 , wherein Y and R 12 taken together form a 4-, 5-, or 6-membered heterocyclic ring.

9. The Btk inhibitor of claim 7 , wherein G is

or

10. The Btk inhibitor of claim 7 , wherein R 6 , R 7 , and R 8 are independently H.

11. An irreversible inhibitor of a Bruton's tyrosine kinase (Btk) having the structure of Formula (D):

wherein

L a is CH 2 , O, NH or S;

Ar is an optionally substituted aromatic carbocycle or an aromatic heterocycle;

Y is an optionally substituted alkyl, heteroalkylene, carbocyclene, heterocyclene, or combination thereof;

Z is C(O), OC(O), NHC(O), C(S), S(O) x , OS(O) x , NHS(O) x , where x is 1 or 2; and

R 6 , R 7 , and R 8 are independently selected from H, alkyl, heteroalkyl, carbocycle, heterocycle, or combinations thereof, wherein the irreversible Btk inhibitor covalently bonds to cysteine 481 of Btk.

12. The Btk inhibitor of claim 11 , wherein La is O, Ar is an aromatic carbocycle, Y is heterocyclene, Z is C(O), and R 6 , R 7 , and R 8 are independently H.

13. An oral formulation comprising the BTK inhibitor of claim 1 .