HETEROCYCLYLAMINES AS PI3K INHIBITORS

1 . A compound of the following formula:

or a pharmaceutically acceptable salt thereof, wherein:

X is CR 9 or N;

W is CR 7 or N;

Y is CR 8 , CR 8a , or N;

Z is a bond or C(═O);

provided that —W=Y—Z— is —CR 7 =CR 8 , —N═CR 8 —, —CR 7 =CR 8a —C(═O)—, —N═CR 8a —C(═O)—, or —CR 7 =N—C(═O)—;

R 1 is C 1-3 alkyl;

R 2 is halo, C 1-6 alkyl, C 1-6 alkoxy, C 1-6 haloalkyl, C 1-6 haloalkoxy, phenyl, or 5-6 membered heteroaryl; wherein said phenyl and 5-6 membered heteroaryl are each optionally substituted by 1, 2, 3, or 4 substituents independently selected from halo, OH, CN, C 1-4 alkyl, C 1-4 alkoxy, and C 1-4 haloalkoxy;

R 4 is H, halo, OH, CN, C 1-4 alkyl, C 1-4 haloalkyl, C 1-4 alkoxy, or C 1-4 haloalkoxy;

R 5 is halo, OH, CN, C 1-4 alkyl, C 1-4 haloalkyl, C 1-4 alkoxy, C 1-4 haloalkoxy, or cyclopropyl;

R 6 is H, halo, OH, CN, C 1-4 alkyl, C 1-4 haloalkyl, C 1-4 alkoxy, or C 1-4 haloalkoxy;

R 7 is H or C 1-4 alkyl;

R 8 is H, halo, —OH, —CN, C 1-6 alkyl, C 2-6 alkenyl, C 2-6 alkynyl, C 1-6 haloalkyl, Cy 2 , —(C 1-3 alkylene)-Cy 2 , OR a2 , SR a2 , C(═O)R b2 , C(═O)NR c2 R d2 , C(═O)OR a2 , OC(═O)R b2 , OC(═O)NR c2 R d2 NR c2 R d2 , NR c2 C(═O)R b2 , NR c2 C(═O)OR b2 NR c2 C(═O)NR c2 R d2 , C(═NR e )R b2 , C(═NR e )NR c2 R d2 , NR c2 C(═NR e )NR c2 R d2 , NR c2 S(═O)R b2 , NR c2 S(═O) 2 NR c2 R d2 , S(═O)R b2 S(═O) 2 R b2 , or S(═O) 2 NR e2 R d2 ; wherein said C 1-6 alkyl, C 2-6 alkenyl, C 2-6 alkynyl are each optionally substituted by 1, 2, 3, or 4 independently selected R 11 groups;

R 8a is H, halo, —CN, C 1-6 alkyl, C 2-6 alkenyl, C 2-6 alkynyl, C 1-6 haloalkyl, Cy 2 , —(C 1-3 alkylene)-Cy 2 , C(═O)R b2 , C(═O)NR c2 R d2 , C(═O)OR a2 , NR c2 R d2 , NR c2 C(═O)R b2 , NR c2 C(═O)OR b2 , NR c2 C(═O)NR c2 R d2 , NR c2 S(═O)R b2 , NR c2 S(═O) 2 NR c2 R d2 , S(═O)R b2 S(═O) 2 R b2 , or S(═O) 2 NR c2 R d2 ; wherein said C 1-6 alkyl, C 2-6 alkenyl, C 2-6 alkynyl are each optionally substituted by 1, 2, 3, or 4 independently selected R 11 groups;

R 9 is H, halo, OH, CN, C 1-4 alkyl, C 1-4 haloalkyl, C 1-4 alkoxy, or C 1-4 haloalkoxy;

R 10 is H or C 1-4 alkyl;

each R e is independently selected from H, CN, OH, C 1-4 alkyl, and C 1-4 alkoxy;

R 3b is selected from Cy 1 , —(C 1-3 alkylene)-Cy 1 , halo, CN, NO 2 , C 1-6 alkyl, C 2-6 alkenyl, C 2-6 alkynyl, C 1-6 haloalkyl, OR a1 , SR a1 , C(═O)R b1 , C(═O)NR c1 R d1 , C(═O)OR a1 , OC(═O)R b1 , OC(═O)NR c1 R d1 , NR c1 R d1 , NR c1 C(═O)R b1 , NR c1 C(═O)OR b1 , NR c1 C(═O)NR c1 R d1 , C(═NR e )R b1 , C(═NR e )NR c1 R d1 , NR c1 C(═NR e )NR c1 R d1 , NR c1 S(═O)R b1 , NR c1 S(═O) 2 NR c1 R d1 , S(═O)R b1 , S(═O) 2 R b1 , and S(═O) 2 NR c1 R d1 ; wherein said C 1-6 alkyl, C 2-6 alkenyl, C 2-6 alkynyl are each optionally substituted with 1, 2, or 3 independently selected R 11 groups;

each Cy 1 is independently selected from C 3-7 cycloalkyl, 4-7 membered heterocycloalkyl, phenyl, and 5-6 membered heteroaryl, each of which is optionally substituted with 1, 2, 3, or 4 independently selected R 11 groups;

each R a1 , R b1 , R c1 , and R d1 is independently selected from H, C 1-6 alkyl, C 1-6 haloalkyl, C 2-6 alkenyl, C 2-6 alkynyl, C 3-7 cycloalkyl, 4-7 membered heterocycloalkyl, phenyl, and 5-6 membered heteroaryl; wherein said C 1-6 alkyl, C 2-6 alkenyl, C 2-6 alkynyl, C 3-7 cycloalkyl, 4-7 membered heterocycloalkyl, phenyl and 5-6 membered heteroaryl are each optionally substituted with 1, 2, or 3 independently selected R 11 groups;

or R c1 and R d1 together with the N atom to which they are attached form a 4-, 5-, 6-, or 7 membered heterocycloalkyl group, which is optionally substituted with —OH or C 1-3 alkyl;

each Cy 2 is independently selected from C 3-7 cycloalkyl, 4-7 membered heterocycloalkyl, phenyl, 5-6 membered heteroaryl, or 9-10-membered bicyclic heteroaryl, each of which is optionally substituted with 1, 2, 3, or 4 independently selected R 11 groups;

each R a2 , R b2 , R c2 , and R d2 is independently selected from H, C 1-6 alkyl, C 1-6 haloalkyl, C 2-6 alkenyl, C 2-6 alkynyl, C 3-7 cycloalkyl, 4-7 membered heterocycloalkyl, phenyl, and 5-6 membered heteroaryl; wherein said C 1-6 alkyl, C 2-6 alkenyl, C 2-6 alkynyl, C 3-7 cycloalkyl, 4-7 membered heterocycloalkyl, phenyl and 5-6 membered heteroaryl are each optionally substituted with 1, 2, or 3 independently selected R 11 groups;

or R c2 and R d2 together with the N atom to which they are attached form a 4-, 5-, 6-, or 7 membered heterocycloalkyl group, which is optionally substituted with —OH or C 1-3 alkyl; and

each R 11 is independently selected from OH, NO 2 , CN, halo, C 1-3 alkyl, C 2-3 alkenyl, C 2-3 alkynyl, C 1-3 haloalkyl, cyano-C 1-3 alkyl, HO—C 1-3 alkyl, C 1-3 alkoxy-C 1-3 alkyl, C 3-7 cycloalkyl, C 1-3 alkoxy, C 1-3 haloalkoxy, amino, C 1-3 alkylamino, di(C 1-3 alkyl)amino, thio, C 1-3 alkylthio, C 1-3 alkylsulfinyl, C 1-3 alkylsulfonyl, carbamyl, C 1-3 alkylcarbamyl, di(C 1-3 alkyl)carbamyl, carboxy, C 1-3 alkylcarbonyl, C 1-4 alkoxycarbonyl, C 1-3 alkylcarbonylamino, C 1-3 alkylsulfonylamino, aminosulfonyl, C 1-3 alkylaminosulfonyl, di(C 1-3 alkyl)aminosulfonyl, aminosulfonylamino, C 1-3 alkylaminosulfonylamino, di(C 1-3 alkyl)aminosulfonylamino, aminocarbonylamino, C 1-3 alkylaminocarbonylamino, and di(C 1-3 alkyl)aminocarbonylamino.

2 . The compound of claim 1 , or a pharmaceutically acceptable salt thereof, wherein

the

 moiety is:

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

4 . The compound of claim 1 , or a pharmaceutically acceptable salt thereof, wherein R 2 is C 1-6 alkyl, C 1-3 alkoxy, or phenyl; wherein said phenyl is optionally substituted by 1, 2, 3, or 4 substituents independently selected from halo.

5 .- 12 . (canceled)

13 . The compound of claim 1 , or a pharmaceutically acceptable salt thereof, wherein R 4 is halo, CN, or C 1-4 alkyl.

14 . The compound of claim 1 , or a pharmaceutically acceptable salt thereof, wherein R 5 is halo or CN.

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

16 . The compound of claim 1 , or a pharmaceutically acceptable salt thereof, wherein R 7 is H.

17 . The compound of claim 1 , or a pharmaceutically acceptable salt thereof, wherein R 8 is H, halo, CN, C 1-6 alkyl, or Cy 2 ; wherein Cy 2 is selected from C 3-6 cycloalkyl, phenyl, 5-6 membered heteroaryl, and 4-7 membered heterocycloalkyl, each of which is optionally substituted by 1 or 2 independently selected R 11 groups.

18 . The compound of claim 1 , or a pharmaceutically acceptable salt thereof, wherein R 8 is H, halo, CN, C 1-6 alkyl, or Cy 2 ; wherein Cy 2 is selected from C 3-6 cycloalkyl, phenyl, 5-6 membered heteroaryl, or 4-7 membered heterocycloalkyl each of which is optionally substituted by 1 R 11 selected from OH, CN, halo, C 1-3 alkyl, C 1-3 haloalkyl, HO—C 1-3 alkyl, C 1-3 alkoxy-C 1-3 alkyl, C 1-3 alkoxy, C 1-3 haloalkoxy, amino, C 1-3 alkylamino, di(C 1-3 alkyl)amino, carbamyl, C 1-3 alkylcarbamyl, and di(C 1-3 alkyl)carbamyl.

19 . The compound of claim 1 , or a pharmaceutically acceptable salt thereof, wherein R 8 is H, halo, CN, methyl, or Cy 2 ; wherein Cy 2 is selected from cyclopropyl, phenyl, a pyrazole ring, a pyridine ring, or a pyrimidine ring, each of which is optionally substituted by 1 R 11 selected from OH, CN, fluoro, methyl, 2-hydroxyethyl, dimethylcarbamyl, amino, methylcarbamyl, and dimethylcarbamyl.

20 . The compound of claim 1 , or a pharmaceutically acceptable salt thereof, wherein each R 11 is independently OH, CN, halo, C 1-3 alkyl, C 1-3 haloalkyl, HO—C 1-3 alkyl, C 1-3 alkoxy-C 1-3 alkyl, C 1-3 alkoxy, C 1-3 haloalkoxy, amino, C 1-3 alkylamino, di(C 1-3 alkyl)amino, carbamyl, C 1-3 alkylcarbamyl, or di(C 1-3 alkyl)carbamyl.

21 . The compound of claim 1 , or a pharmaceutically acceptable salt thereof, wherein R 8a is H, halo, —CN, C 1-6 alkyl, C 2-6 alkenyl, C 2-6 alkynyl, C 1-6 haloalkyl, or Cy 2 .

22 . The compound of claim 1 , or a pharmaceutically acceptable salt thereof, wherein R 8a is H or halo.

23 . The compound of claim 1 , or a pharmaceutically acceptable salt thereof, wherein R 9 is H.

24 . The compound of claim 1 , or a pharmaceutically acceptable salt thereof, wherein R 10 is H.

25 .- 32 . (canceled)

33 . The compound of claim 1 , wherein the compound is a compound of Formula VIb:

or a pharmaceutically acceptable salt thereof.

34 .- 51 . (canceled)

52 . The compound of claim 1 , which is selected from:

5-{3-[1-(4-Amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl]-5-chloro-2-methoxy-6-methylphenyl}-N,N-dimethylpyridine-2-carboxamide;

5-{3-[1-(4-Amino-7H-pyrrolo[2,3-d]pyrimidin-7-yl)ethyl]-5-chloro-2-methoxy-6-methylphenyl}-N,N-dimethylpyridine-2-carboxamide;

5-{3-[1-(4-Amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl]-5-chloro-2-ethoxy-6-methylphenyl}-N,N-dimethylpyridine-2-carboxamide;

5-{3-[1-(4-Amino-3-iodo-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl]-5-chloro-2-ethoxy-6-methylphenyl}-N,N-dimethylpyridine-2-carboxamide;

5-(3-(1-(4-amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl)-5-chloro-2-methoxy-6-methylphenyl)-N-(2-hydroxyethyl) picolinamide;

4-{3-[1-(4-Amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl]-5-chloro-2-methoxy-6-methylphenyl}-N-(2-hydroxyethyl)-N-methylpyridine-2-carboxamide;

5-{3-[1-(4-Amino-5-oxopyrido[2,3-d]pyrimidin-8 (5H)-yl)ethyl]-5-chloro-2-methoxy-6-methylphenyl}-N,N-dimethylpyridine-2-carboxamide;

5-{3-[1-(4-amino-5-oxopyrido[2,3-d]pyrimidin-8 (5H)-yl)ethyl]-5-chloro-2-methoxy-6-methylphenyl}-N-methylpyridine-2-carboxamide;

5-{3-[1-(4-Amino-5-oxopyrido[2,3-d]pyrimidin-8 (5H)-yl)ethyl]-5-chloro-2-ethoxy-6-methylphenyl}-N,N-dimethylpyridine-2-carboxamide;

5-{3-[1-(4-Amino-3-methyl-1H-pyrazolo[4,3-c]pyridin-1-yl)ethyl]-5-chloro-2-methoxy-6-methylphenyl}-N,N-dimethylpyridine-2-carboxamide;

5-{3-[1-(4-Amino-5-methyl-7H-pyrrolo[2,3-d]pyrimidin-7-yl)ethyl]-5-chloro-2-methoxy-6-methylphenyl}-N,N-dimethylpyridine-2-carboxamide;

5-(3-(1-(4-amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl)-5-chloro-6-cyano-2-ethoxyphenyl)-N,N-dimethylpicolinamide;

5-{3-[1-(4-amino-5-oxopyrido[2,3-d]pyrimidin-8 (5H)-yl)ethyl]-5-chloro-6-cyano-2-ethoxyphenyl}-N,N-dimethylpyridine-2-carboxamide;

5-(3-{1-[4-amino-3-(3-fluorophenyl)-1H-pyrazolo[3,4-d]pyrimidin-1-yl]ethyl}-5-chloro-2-ethoxy-6-methylphenyl)-N,N-dimethylpyridine-2-carboxamide;

5-(3-{1-[4-amino-3-(1H-pyrazol-4-yl)-1H-pyrazolo[3,4-d]pyrimidin-1-yl]ethyl}-5-chloro-2-ethoxy-6-methylphenyl)-N,N-dimethylpyridine-2-carboxamide;

5-(3-{1-[4-amino-3-(1-methyl-1H-pyrazol-4-yl)-1H-pyrazolo[3,4-d]pyrimidin-1-yl]ethyl}-5-chloro-2-ethoxy-6-methylphenyl)-N,N-dimethylpyridine-2-carboxamide;

5-(3-{1-[4-amino-3-(1-methyl-1H-pyrazol-3-yl)-1H-pyrazolo[3,4-d]pyrimidin-1-ylethyl}-5-chloro-2-ethoxy-6-methylphenyl)-N,N-dimethylpyridine-2-carboxamide;

5-(3-{1-[4-amino-3-(1H-pyrazol-3-yl)-1H-pyrazolo[3,4-d]pyrimidin-1-yl]ethyl}-5-chloro-2-ethoxy-6-methylphenyl)-N,N-dimethylpyridine-2-carboxamide;

5-[3-(1-{4-amino-3-[1-(2-hydroxyethyl)-1H-pyrazol-4-yl]-1H-pyrazolo[3,4-d]pyrimidin-1-yl}ethyl)-5-chloro-2-ethoxy-6-methylphenyl]-N,N-dimethylpyridine-2-carboxamide;

5-{3-[1-(4-amino-3-cyclopropyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl]-5-chloro-2-ethoxy-6-methylphenyl}-N,N-dimethylpyridine-2-carboxamide;

5-{3-[1-(4-amino-3-cyano-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl]-5-chloro-2-ethoxy-6-methylphenyl}-N,N-dimethylpyridine-2-carboxamide;

5-(3-{1-[4-amino-3-(4-fluorophenyl)-1H-pyrazolo[3,4-d]pyrimidin-1-yl]ethyl}-5-chloro-2-ethoxy-6-methylphenyl)-N,N-dimethylpyridine-2-carboxamide;

5-{4-amino-1-[1-(5-chloro-3-{6-[(dimethylamino) carbonyl]pyridin-3-yl}-2-ethoxy-4-methylphenyl)ethyl]-1H-pyrazolo[3,4-d]pyrimidin-3-yl}-N,N-dimethylpyridine-2-carboxamide;

5-(3-{1-[4-amino-3-(5-cyanopyridin-3-yl)-1H-pyrazolo[3,4-d]pyrimidin-1-yl]ethyl}-5-chloro-2-ethoxy-6-methylphenyl)-N,N-dimethylpyridine-2-carboxamide;

5-(3-{1-[4-amino-3-(2-aminopyrimidin-5-yl)-1H-pyrazolo[3,4-d]pyrimidin-1-yl]ethyl}-5-chloro-2-ethoxy-6-methylphenyl)-N,N-dimethylpyridine-2-carboxamide;

5-{3-[1-(4-amino-3-{6-[(methylamino) carbonyl]pyridin-3-yl}-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl]-5-chloro-2-ethoxy-6-methylphenyl}-N,N-dimethylpyridine-2-carboxamide;

5-{3-[1-(4-amino-3-pyridin-4-yl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl]-5-chloro-2-ethoxy-6-methylphenyl}-N,N-dimethylpyridine-2-carboxamide;

5-{3-[1-(4-amino-3-pyridin-3-yl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl]-5-chloro-2-ethoxy-6-methylphenyl}-N,N-dimethylpyridine-2-carboxamide;

5-{3-[1-(4-amino-3-{5-[(dimethylamino) carbonyl]pyridin-3-yl}-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl]-5-chloro-2-ethoxy-6-methylphenyl}-N,N-dimethylpyridine-2-carboxamide;

5-{3-[1-(4-amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl]-5-chloro-2-methoxy-6-methylphenyl}-N,N-dimethylpyridine-2-carboxamide;

5-[3-(1-{4-Amino-3-[(3R)-3-hydroxybut-1-yn-1-yl]-1H-pyrazolo[3,4-d]pyrimidin-1-yl}ethyl)-5-chloro-2-ethoxy-6-methylphenyl]-N,N-dimethylpyridine-2-carboxamide;

5-[3-(1-{4-Amino-3-[(3S)-3-hydroxybut-1-yn-1-yl]-1H-pyrazolo[3,4-d]pyrimidin-1-yl}ethyl)-5-chloro-2-ethoxy-6-methylphenyl]-N,N-dimethylpyridine-2-carboxamide;

5-{3-[1-(4-Amino-3-ethyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl]-5-chloro-2-ethoxy-6-methylphenyl}-N,N-dimethylpyridine-2-carboxamide;

5-(3-{1-[4-Amino-3-(difluoromethyl)-1H-pyrazolo[3,4-d]pyrimidin-1-yl]ethyl}-5-chloro-2-ethoxy-6-methylphenyl)-N,N-dimethylpyridine-2-carboxamide;

5-(3-{1-[4-Amino-3-(hydroxymethyl)-1H-pyrazolo[3,4-d]pyrimidin-1-yl]ethyl}-5-chloro-2-ethoxy-6-methylphenyl)-N,N-dimethylpyridine-2-carboxamide;

5-[3-(1-{4-Amino-3-[(methylamino)methyl]-1H-pyrazolo[3,4-d]pyrimidin-1-yl}ethyl)-5-chloro-2-ethoxy-6-methylphenyl]-N,N-dimethylpyridine-2-carboxamide;

5-[3-(1-{4-Amino-3-[(dimethylamino)methyl]-1H-pyrazolo[3,4-d]pyrimidin-1-yl}ethyl)-5-chloro-2-ethoxy-6-methylphenyl]-N,N-dimethylpyridine-2-carboxamide;

5-(3-{1-[4-Amino-3-(fluoromethyl)-1H-pyrazolo[3,4-d]pyrimidin-1-yl]ethyl}-5-chloro-2-ethoxy-6-methylphenyl)-N,N-dimethylpyridine-2-carboxamide;

5-(3-(1-(4-Amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl)-5-chloro-2-methoxy-6-methylphenyl)-N,N-dimethylpicolinamide;

2-[(5-{3-[1-(4-Amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl]-5-chloro-2-methoxy-6-methylphenyl}pyridin-2-yl)amino]ethanol;

2-(5-(3-(1-(4-Amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl)-5-chloro-2-methoxy-6-methylphenyl)pyridin-2-yloxy) ethanol;

5-(3-(1-(4-Amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl)-5-chloro-2-(2,2-difluoroethoxy)-6-methylphenyl)-N,N-dimethylpicolinamide;

5-(3-{1-[4-Amino-3-(difluoromethyl)-1H-pyrazolo[3,4-d]pyrimidin-1-yl]ethyl}-5-chloro-2-methoxy-6-methylphenyl)-N,N-dimethylpyridine-2-carboxamide;

5-(3-(1-(4-Amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl)-5-chloro-2-ethoxy-6-methylphenyl)-N,N-dimethylpicolinamide;

4-(3-(1-(4-Amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl)-5-chloro-2-methoxy-6-methylphenyl)-N,N-dimethylpicolinamide;

1-(1-(3-(6-aminopyridin-3-yl)-5-chloro-2-methoxy-4-methylphenyl)ethyl)-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-4-amine;

5-(3-(1-(4-amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl)-5-chloro-2-methoxy-6-methylphenyl)-N-methylpicolinamide;

1-(1-(5-chloro-3-(6-(dimethylamino)pyridin-3-yl)-2-methoxy-4-methylphenyl)ethyl)-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-4-amine;

5-(3-(1-(4-amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl)-5-chloro-2-ethoxy-6-methylphenyl)-N-methylpicolinamide;

5-{3-[1-(4-amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl]-5-chloro-6-cyano-2-methoxyphenyl}-N,N-dimethylpyridine-2-carboxamide;

5-{3-[1-(4-amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl]-6-cyano-2-ethoxy-5-methylphenyl}-N,N-dimethylpyridine-2-carboxamide;

4-[1-(4-amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl]-6-chloro-3-ethoxy-2-[6-(1-hydroxy-1-methylethyl) pyridin-3-yl]benzonitrile;

4-[1-(4-amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl]-6-chloro-3-ethoxy-2-[6-(2-methyl-2H-tetrazol-5-yl) pyridin-3-yl]benzonitrile;

4-[1-(4-amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl]-6-chloro-3-ethoxy-2-[6-(2-methyl-2H-1,2,3-triazol-4-yl) pyridin-3-yl]benzonitrile;

4-[1-(4-amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl]-6-chloro-3-ethoxy-2-[6-(5-methyl-1,3,4-oxadiazol-2-yl) pyridin-3-yl]benzonitrile;

5-{3-[1-(4-amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl]-6-cyano-2-methoxy-5-methylphenyl}-N,N-dimethylpyridine-2-carboxamide;

5-(3-{1-[4-Amino-5-oxo-6-(1H-pyrazol-4-yl)pyrido[2,3-d]pyrimidin-8 (5H)-yl]ethyl}-5-chloro-2-methoxy-6-methylphenyl)-N,N-dimethylpyridine-2-carboxamide; and

5-{3-[1-(4-Amino-6-methyl-5-oxopyrido[2,3-d]pyrimidin-8 (5H)-yl)ethyl]-5-chloro-2-methoxy-6-methylphenyl}-N,N-dimethylpyridine-2-carboxamide;

or a pharmaceutically acceptable salt thereof of any of the aforementioned.

53 . A pharmaceutical composition comprising a compound of claim 1 , or a pharmaceutically acceptable salt thereof, and at least one pharmaceutically acceptable carrier.

54 . A method of inhibiting an activity of a PI3Kδ kinase, comprising contacting the kinase with a compound of claim 1 , or a pharmaceutically acceptable salt thereof.

55 .- 57 . (canceled)

58 . A method of inhibiting or ameliorating a disease associated with abnormal expression or activity of a PI3Kδ kinase in a patient in need thereof, comprising administering to said patient a therapeutically effective amount of a compound of claim 1 , or a pharmaceutically acceptable salt thereof.

59 .- 68 . (canceled)