2-pyrimidinyl pyrazolopyridine ErbB kinase inhibitors

1. A compound of formula (I):

wherein:

a is 0, 1, 2 or 3;

each R 1 is the same or different and is independently selected from halo, alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, Ay, Het, —OR 6 , —R 4 OR 6 , —OC(O)R 6 , —C(O)R 6 , —R 4 C(O)R 6 , —C(O)NR 6 R 7 , —R 4 C(O)NR 6 R 7 , —CO 2 R 6 , —C(S)R 6 , —C(S)NR 6 R 7 , —S(O) f R 6 , —R 4 S(O) f R 6 , —S(O) 2 NR 6 R 7 , —NR 6 R 7 , —R 4 NR 6 R 7 , —N(R 6 )—R 4 R 7 , —N(R 6 )—R 4 —OR 7 , —N(R 6 )—R 4 —S(O) f R 7 , —N(R 6 )—R 4 —CN, —C(NH)NR 6 R 7 , —N(R 6 )C(O)R 6 , —N(R 6 )S(O) 2 R 6 , —N(R 6 )—C(O)—NR 6 R 7 , —N(R 6 )—S(O) 2 —NR 6 R 7 , —CN, and —NO 2 ;

f is 0, 1 or 2;

Ay is aryl optionally substituted 1, 2 or 3 times with a substituent selected from halo, C 1-3 alkyl, C 1-3 alkoxy, NH 2 , N(H)C 1-3 alkyl, N(C 1-3 alkyl) 2 , CN and NO 2 ;

Het is a 5-6 membered heterocycle or heteroaryl having 1 or 2 heteroatoms selected from N, O and S and optionally substituted 1, 2 or 3 times with a substituent selected from halo, C 1-3 alkyl, C 1-3 alkoxy, hydroxyl, oxo, C(O)(C 1-3 alkyl), SO 3 (H), SO 2 (C 1-3 alkyl), C 1-3 alkyl-SO 3 (H), C 1-3 alkyl-SO 2 (C 1-3 alkyl), NH 2 , N(H)C 1-3 alkyl, N(C 1-3 alkyl) 2 , CN and NO 2 ;

Ring A is selected from aryl, heterocycle and heteroaryl;

R 9 is C 1-4 alkylene, C 2-4 alkenylene or C 3-4 cycloalkylene;

Y 1 is —C(O)—, —N(H)C(O)—, —C(S)— or —N(H)C(S)—;

b and c are each the same or different and are each independently 0, 1 or 2;

each R 2 is the same or different and is independently selected from halo, alkyl, —OR 6 , —S(O) f R 6 , —NR 6 R 7 , —CN and —NO 2 ;

d is 0, 1 or 2;

each R 3 is the same or different and is independently selected from halo, alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, Ay, Het, —OR 6 , —R 4 OR 6 , —OAy, —R 4 OAy, —OC(O)R 6 , —COR 6 , —R 4 C(O)R 6 , —C(O)Ay, —C(O)NR 6 R 7 , —R 4 C(O)NR 6 R 7 , —C(O)N(H)Ay, —C(O)N(H)Het, —CO 2 R 6 , —CO 2 Ay, —C(S)R 6 , —C(S)NR 6 R 7 , —S(O) f R 6 , —R 4 S(O) f R 6 , —S(O) f Ay, —S(O) 2 NR 6 R 7 , —NR 6 R 7 , —R 4 NR 6 R 7 , —N(R 8 )Ay, —R 4 N(H)Ay, —N(H)Het, —N(H)R 4 Het, —N(R 6 )—R 4 R 7 , —N(R 6 )—R 4 —OR 7 , —N(R 6 )—R 4 —S(O) f R 7 , —N(R 6 )—R 4 —CN, —C(NH)NR 6 R 7 , —N(H)C(O)R 6 , —N(H)C(O)Ay, —N(H)SO 2 R 6 , —N(R 6 )—C(O)—NR 6 R 7 , —N(R 6 )—S(O) 2 —NR 6 R 7 , —CN and —NO 2 ;

each R 4 is the same or different and is independently C 1-4 alkylene or C 3-4 alkenylene;

e is 0 or 1;

Ring B is selected from aryl and heteroaryl;

g is 0, 1, 2, 3 or 4;

each Z is the same or different and is independently a moiety of formula ii:

(Alk) m -(Y 2 ) n -(Alk) p -(R 5 ) q

wherein:

m, n and p are the same or different and are each independently 0 or 1;

each Alk is the same or different and is independently selected from C 1-4 alkylene and C 3-4 alkenylene;

Y 2 is —O—, —C(O)—, —S(O) f —, —N(H)— or —N(Alk)-;

q is 1 or 2;

each R 5 is the same or different and is independently selected from H, halo, alkyl, alkenyl, cycloalkyl, cycloalkenyl, Ay, Het, oxo, —OR 6 , —OAy, —C(O)R 6 , —OC(O)R 6 , —C(O)Ay, —OC(O)Ay, —C(O)NR 6 R 7 , —CO 2 R 6 , —CO 2 Ay, —S(O) f R 6 , —S(O) f Ay, —S(O) 2 NR 6 R 7 , —C(S)R 6 , —C(S)NR 6 R 7 , —C(S)N(H)Ay, —NR 6 R 7 , —N(R 8 )Ay, —N(R 8 )Het, —N(R 6 )—R 4 R 7 , —N(R 6 )—R 4 —OR 7 , —N(R 6 )—R 4 —S(O) f R 7 , —N(R 6 )—R 4 —CN, —NHC(O)R 6 , —N(H)S(O) 2 R 6 , —C(NH)NR 6 R 7 , —N(R 6 )—C(O)—NR 6 R 7 , —N(R 6 )—S(O) 2 —NR 6 R 7 , —N(R 6 )—C(O)—R 4 NR 6 R 7 , —N(R 6 )—S(O) 2 —R 4 NR 6 R 7 , —CN and —NO 2 ;

each R 6 and R 7 are the same or different and are each independently selected from H, alkyl, alkenyl, alkynyl, C 3-6 cycloalkyl and C 3-6 cycloalkenyl; and

each R 8 is the same or different and is H or alkyl,

or a pharmaceutically acceptable salt thereof.

2. The compound according to claim 1 , wherein a is 1 or 2.

3. The compound according to claim 1 , wherein each R 1 is the same or different and is independently selected from halo, alkyl, alkenyl, alkynyl, cycloalkyl, cycloalkenyl, Ay, Het, —OR 6 , —R 4 OR 6 , —OC(O)R 6 , —C(O)R 6 , —R 4 C(O)R 6 , —C(O)NR 6 R 7 , —CO 2 R 6 , C(S)R 6 , C(S)NR 6 R 7 , —S(O) f R 6 , —R 4 S(O) f R 6 , —S(O) 2 NR 6 R 7 , —NR 6 R 7 , —R 4 NR 6 R 7 , —N(R 6 )C(O)R 6 , —N(R 6 )S(O) 2 R 6 , —N(R 6 )—C(O)—NR 6 R 7 , —N(R 6 )—S(O) 2 —NR 6 R 7 , —CN and —NO 2 .

4. The compound according to claim 1 , wherein Ring A is aryl or heteroaryl.

5. The compound according to claim 1 , wherein Y 1 is —C(O)— or —N(H)C(O)—.

6. The compound according to claim 1 , wherein each R 2 is the same or different and is independently selected from halo, alkyl, —OR 6 , —NR 6 R 7 and —CN.

7. The compound according to claim 1 , wherein b is 0.

8. The compound according to claim 1 , wherein c is 0.

9. The compound according to claim 1 , wherein d is 0 or 1.

10. The compound according to claim 1 , wherein each R 3 is the same or different and is independently selected from halo, alkyl, alkenyl, alkynyl, cycloalkyl, Ay, Het, —OR 6 , —R 4 OR 6 , —OC(O)R 6 , —COR 6 , —R 4 C(O)R 6 , —C(O)NR 6 R 7 , —S(O) f R 6 , —R 4 S(O) f R 6 , —S(O) 2 NR 6 R 7 , —NR 6 R 7 , —R 4 NR 6 R 7 , —N(R 8 )Ay, —R 4 N(H)Ay, —N(H)Het, —N(R 6 )—R 4 —OR 7 , —N(R 6 )—R 4 —S(O) f R 7 , —N(R 6 )—R 4 —CN, —N(H)C(O)R 6 , —N(H)SO 2 R 6 , —N(R 6 )—C(O)—NR 6 R 7 , —N(R 6 )—S(O) 2 —NR 6 R 7 , —CN and —NO 2 .

11. The compound according to claim 1 , wherein (R 4 ) e is C 1-4 alkylene.

12. The compound according to claim 1 , wherein e is 0.

13. The compound according to claim 1 , wherein Ring B is aryl.

14. The compound according to claim 1 , wherein g is 0, 1, 2 or 3.

15. The compound according to claim 1 , wherein each Alk is the same or different and is independently C 1-3 alkylene.

16. The compound according to claim 1 , wherein n is 1.

17. The compound according to claim 1 , wherein n is 0.

18. The compound according to claim 1 , wherein Y 2 is —O—, —C(O)— or —N(H)—.

19. The compound according to claim 1 , wherein q is 1.

20. The compound according to claim 1 , wherein each R 5 is the same or different and is independently selected from H, halo, alkyl, alkenyl, cycloalkyl, Ay, Het, oxo, —OR 6 , —OAy, —C(O)R 6 , —OC(O)R 6 , —C(O)Ay, —C(O)NR 6 R 7 , —CO 2 R 6 , —S(O) f R 6 , —S(O) 2 NR 6 R 7 , —C(S)NR 6 R 7 , —NR 6 R 7 , —N(R 8 )Ay, —N(R 8 )Het, —N(R 6 )—R 4 R 7 , —N(R 6 )—R 4 —OR 7 , —N(R 6 )—R 4 —S(O) f R 7 , —N(R 6 )—R 4 —CN, —NHC(O)R 6 , —N(H)S(O) 2 R 6 , —C(NH)NR 6 R 7 , —N(R 6 )—C(O)—NR 6 R 7 , —N(R 6 )—S(O) 2 —NR 6 R 7 , —N(R 6 )—C(O)—R 4 NR 6 R 7 , —CN and —NO 2 .

21. A compound selected from:

N-[3-(3-{2-[(2-Methyl-1,2,3,4-tetrahydro-7-isoquinolinyl)amino]-4-pyrimidinyl}pyrazolo[1,5-a]pyridin-2-yl)phenyl]-2-(2-thienyl)acetamide;

N-[3-(3-{2-[(3-{[2-(1-Pyrrolidinyl)ethyl]oxy}phenyl)amino]-4-pyrimidinyl}pyrazolo[1,5-a]pyridin-2-yl)phenyl]-2-(2-thienyl)acetamide;

N-{5-[3-(2-{[2-(Dimethylamino)-2,3-dihydro-1H-inden-5-yl]amino}pyrimidin-4-yl)pyrazolo[1,5-a]pyridin-2-yl]-2-methoxyphenyl}-2-(2-thienyl)acetamide;

N-[2-Methoxy-5-(3-{2-[(2-methyl-1,2,3,4-tetrahydroisoquinolin-7-yl)amino]pyrimidin-4-yl}pyrazolo[1,5-a]pyridin-2-yl)phenyl]-2-(2-thienyl)acetamide;

N-{3-[3-(2-{[3-(4-methyl-1,3-oxazol-5-yl)phenyl]amino}pyrimidin-4-yl)pyrazolo[1,5-a]pyridin-2-yl]phenyl}-2-(2-thienyl)acetamide;

N-{3-[3-(2-{[2-(Dimethylamino)-2,3-dihydro-1H-inden-5-yl]amino}pyrimidin-4-yl)pyrazolo[1,5-a]pyridin-2-yl]phenyl}-2-(2-thienyl)acetamide;

N-{2-Methyl-5-[3-(2-{[3-(1-pyrrolidinylmethyl)phenyl]amino}-4-pyrimidinyl)pyrazolo[1,5-a]pyridin-2-yl]phenyl}-2-(2-thienyl)acetamide;

N-[5-(3-{2-[(5-{[2-(Dimethylamino)ethyl]oxy}-2-methylphenyl)amino]-4-pyrimidinyl}pyrazolo[1,5-a]pyridin-2-yl)-2-methylphenyl]-2-(2-thienyl)acetamide;

N-[5-(3-{2-[(3-{[2-(Dimethylamino)ethyl]oxy}phenyl)amino]-4-pyrimidinyl}pyrazolo[1,5-a]pyridin-2-yl)-2-methylphenyl]-2-(2-thienyl)acetamide;

N-[2-Methyl-5-(3-{2-[(2-methyl-1,2,3,4-tetrahydro-7-isoquinolinyl)amino]-4-pyrimidinyl}pyrazolo[1,5-a]pyridin-2-yl)phenyl]-2-(2-thienyl)acetamide;

N-[5-(3-{2-[(3-{[2-(Dimethylamino)ethyl]oxy}-2-methylphenyl)amino]-4-pyrimidinyl}pyrazolo[1,5-a]pyridin-2-yl)-2-fluorophenyl]-2-(2-thienyl)acetamide;

N-{2-Fluoro-5-[3-(2-{[3-(1-pyrrolidinylmethyl)phenyl]amino}-4-pyrimidinyl)pyrazolo[1,5-a]pyridin-2-yl]phenyl}-2-(2-thienyl)acetamide;

N-[5-(3-{2-[(3-{[2-(Dimethylamino)ethyl]oxy}-2-methylphenyl)amino]-4-pyrimidinyl}pyrazolo[1,5-a]pyridin-2-yl)-2-fluorophenyl]-2-(2-thienyl)acetamide;

N-[2-Fluoro-5-(3-{2-[(2-methyl-1,2,3,4-tetrahydro-7-isoquinolinyl)amino]-4-pyrimidinyl}pyrazolo[1,5-a]pyridin-2-yl)phenyl]-2-(2-thienyl)acetamide;

N-[5-(3-{2-[(3-{[2-(Dimethylamino)ethyl]oxy}-2-methylphenyl)amino]-4-pyrimidinyl}pyrazolo[1,5-a]pyridin-2-yl)-2-(methyloxy)phenyl]-2-(2-thienyl)acetamide;

N-[5-(3-{2-[(3-{[2-(Dimethylamino)ethyl]oxy}phenyl)amino]-4-pyrimidinyl}pyrazolo[1,5-a]pyridin-2-yl)-2-(methyloxy)phenyl]-2-(2-thienyl)acetamide;

N-[5-(3-{2-[(5-{[2-(Dimethylamino)ethyl]oxy}-2-methylphenyl)amino]-4-pyrimidinyl}pyrazolo[1,5-a]pyridin-2-yl)-2-(methyloxy)phenyl]-2-(2-thienyl)acetamide;

N-{3-[6-Methyl-3-(2-{[3-(1-pyrrolidinylmethyl)phenyl]amino}-4-pyrimidinyl)pyrazolo[1,5-a]pyridin-2-yl]phenyl}-2-(2-thienyl)acetamide;

N-[3-(3-{2-[(3-{[2-(Dimethylamino)ethyl]oxy}phenyl)amino]-4-pyrimidinyl}-6-methylpyrazolo[1,5-a]pyridin-2-yl)phenyl]-2-(2-thienyl)acetamide; and

N-{3-[3-(2-{[4-(4-Acetyl-1-piperazinyl)phenyl]amino}-4-pyrimidinyl)-6-methylpyrazolo[1,5-a]pyridin-2-yl]phenyl}-2-(2-thienyl)acetamide,

and pharmaceutically acceptable salts thereof.

22. A pharmaceutical composition comprising a compound according to claim 1 and a pharmaceutically acceptable carrier, diluent or excipient.

23. The pharmaceutical composition according to claim 22 further comprising a chemotherapeutic agent.

24. A method for treating breast cancer in a human in need thereof, said method comprising administering to the human a therapeutically effective amount of a compound according to claim 1 .

25. A process for preparing a compound according to claim 1 , said process comprising the steps of:

a) reacting a compound of formula (VII):

with a compound of formula (VIII) or a compound of formula (IX):

wherein LG is a leaving group and W is O or S;

to prepare a compound of formula (I);

b) optionally converting the compound of formula (I) to a pharmaceutically acceptable salt thereof; and

c) optionally converting the compound of formula (I) or a pharmaceutically acceptable salt thereof to a different compound of formula (I) or a pharmaceutically acceptable salt thereof.