USE OF PYRAZOLOPYRIMIDINE DERIVATIVES FOR THE TREATMENT OF PI3K-DELTA RELATED DISORDERS

1 . A method of treating a disease selected from autoimmune hemolytic anemia pemphigus, and myelofibrosis in a patient, comprising administering to said patient a therapeutically effective amount of a compound of Formula I:

or a pharmaceutically acceptable salt thereof, wherein:

R 2 is C 1-6 alkyl or C 1-6 haloalkyl;

R 4 is 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, or C 1-4 haloalkoxy;

Cy is 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 3 groups;

each R 3 is independently 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, 3, or 4 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 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;

each R b1 is independently selected from 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 R e is independently selected from H, CN, OH, C 1-4 alkyl, and C 1-4 alkoxy; 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 method of claim 1 , wherein R 2 is C 1-3 alkyl or C 1-3 fluoroalkyl.

3 . The method of claim 1 , wherein R 2 is methyl, ethyl, or 2,2-difluoromethyl.

4 . The method of claim 1 , wherein R 2 is methyl.

5 . The method of claim 1 , wherein R 2 is ethyl.

6 . The method of claim 1 , wherein R 4 is halo, CN, or C 1-3 alkyl.

7 . The method of claim 1 , wherein R 4 is F, Cl, CN, or methyl.

8 . The method of claim 1 , wherein R 4 is F.

9 . The method of claim 1 , wherein R 4 is Cl.

10 . The method of claim 1 , wherein R 4 is CN.

11 . The method of claim 1 , wherein R 4 is methyl.

12 . The method of claim 1 , wherein R 5 is halo, CN, or C 1-3 alkyl.

13 . The method of claim 1 , wherein R 5 is Cl, CN, or methyl.

14 . The method of claim 1 , wherein R 5 is Cl.

15 . The method of claim 1 , wherein R 5 is CN.

16 . The method of claim 1 , wherein R 5 is methyl.

17 . The method of claim 1 , wherein Cy is selected from C 3-6 cycloalkyl, 4-6 membered heterocycloalkyl, phenyl, and 5-6 membered heteroaryl, each of which is optionally substituted with 1, 2, 3, or 4 independently selected R 3 groups.

18 . The method of claim 1 , wherein Cy is 4-6 membered heterocycloalkyl, each of which is optionally substituted with 1, 2, 3, or 4 independently selected R 3 groups.

19 . The method of claim 1 , wherein Cy is selected from a cyclopropyl ring, a phenyl ring, an azetidine ring, a pyrrolidine ring, a piperidine ring, 3-oxo-morpholin-6-yl, 2-oxo-pyrrolidin-4-yl, 2-oxo-oxazolidin-4-yl, 2-oxo-oxazolidin-5-yl, a pyrazole ring, a pyridine ring, and a pyrimidine ring, each of which is optionally substituted with 1, 2, 3, or 4 independently selected R 3 groups.

20 . The method of claim 1 , wherein:

each R 3 is independently selected from Cy 1 , —(C 1-3 alkylene)-Cy 1 , halo, CN, C 1-6 alkyl, OR a1 , NR c1 R d1 , C(═O)R b1 , C(═O)OR a1 , C(═O)NR c1 R d1 , and S(═O) 2 R b1 , wherein said C 1-6 alkyl is optionally substituted with 1, 2, 3, or 4 independently selected R 11 groups;

each Cy 1 is independently C 3-7 cycloalkyl, which is optionally substituted with 1, 2, 3, or 4 independently selected R 11 groups;

each R a1 , R c1 , and R d1 is independently selected from H and C 1-6 alkyl, wherein said C 1-6 alkyl is optionally substituted with 1, 2, or 3 independently selected R 11 groups;

each R b1 is independently C 1-6 alkyl, which is optionally substituted with 1, 2, or 3 independently selected R 11 groups; and

each R 11 is independently OH, CN, halo, cyano-C 1-3 alkyl, C 1-3 haloalkoxy, amino, C 1-3 alkylamino, di(C 1-3 alkyl)amino, C 1-3 alkylcarbonyl, C 1-3 alkoxycarbonyl, carbamyl, C 1-3 alkylcarbamyl, or di(C 1-3 alkyl)carbamyl.

21 . The method of claim 1 , wherein:

R 2 is C 1-3 alkyl or C 1-3 fluoroalkyl;

R 4 is halo, CN, or C 1-3 alkyl;

R 5 is halo, CN, or C 1-3 alkyl;

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

each R 3 is independently selected from Cy 1 , —(C 1-3 alkylene)-Cy 1 , halo, CN, C 1-6 alkyl, OR a1 , NR c1 R d1 , C(═O)R b1 , C(═O)OR a1 , C(═O)NR c1 R d1 , and S(═O) 2 R b1 , wherein said C 1-6 alkyl is optionally substituted with 1, 2, 3, or 4 independently selected R 11 groups;

each Cy 1 is independently C 3-7 cycloalkyl, which is optionally substituted with 1, 2, 3, or 4 independently selected R 11 groups;

each R a1 , R c1 , and R d1 is independently selected from H and C 1-6 alkyl, wherein said C 1-6 alkyl is optionally substituted with 1, 2, or 3 independently selected R 11 groups;

each R b1 is independently C 1-6 alkyl, which is optionally substituted with 1, 2, or 3 independently selected R 11 groups; and

each R 11 is independently OH, CN, halo, cyano-C 1-3 alkyl, C 1-3 haloalkoxy, amino, C 1-3 alkylamino, di(C1-3 alkyl)amino, C 1-3 alkylcarbonyl, C 1-3 alkoxycarbonyl, carbamyl, C 1-3 alkylcarbamyl, or di(C 1-3 alkyl)carbamyl.

22 . The method of claim 1 , wherein:

R 2 is methyl, ethyl, or 2,2-difluoromethyl;

R 4 is F, Cl, CN, or methyl;

R 5 is Cl, CN, or methyl;

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

each R 3 is independently selected from Cy 1 , —(C 1-3 alkylene)-Cy 1 , halo, CN, C 1-6 alkyl, OR a , NR c1 R d1 , C(═O)R b1 , C(═O)OR a1 , C(═O)NR c1 R d1 , and S(═O) 2 R b1 , wherein said C 1-6 alkyl is optionally substituted with 1, 2, 3, or 4 independently selected R 11 groups;

each Cy 1 is independently C 3-7 cycloalkyl, which is optionally substituted with 1, 2, 3, or 4 independently selected R 11 groups;

each R a1 , R c1 , and R d1 is independently selected from H and C 1-6 alkyl, wherein said C 1-6 alkyl is optionally substituted with 1, 2, or 3 independently selected R 11 groups;

each R b1 is independently C 1-6 alkyl, which is optionally substituted with 1, 2, or 3 independently selected R 11 groups; and

each R 11 is independently OH, CN, halo, cyano-C 1-3 alkyl, C 1-3 haloalkoxy, amino, C 1-3 alkylamino, di(C 1-3 alkyl)amino, C 1-3 alkylcarbonyl, C 1-3 alkoxycarbonyl, carbamyl, C 1-3 alkylcarbamyl, or di(C 1-3 alkyl)carbamyl.

23 . The method of claim 1 , wherein:

R 2 is methyl, ethyl, or 2,2-difluoromethyl;

R 4 is F, Cl, CN, or methyl;

R 5 is Cl, CN, or methyl;

Cy is selected from a cyclopropyl ring, a phenyl ring, an azetidine ring, a pyrrolidine ring, a piperidine ring, 3-oxo-morpholin-6-yl, 2-oxo-pyrrolidin-4-yl, 2-oxo-oxazolidin-4-yl, 2-oxo-oxazolidin-5-yl, a pyrazole ring, a pyridine ring, and a pyrimidine ring, each of which is optionally substituted with 1, 2, 3, or 4 independently selected R 3 groups

each R 3 is independently selected from Cy 1 , —(C 1-3 alkylene)-Cy 1 , halo, C 1-6 alkyl, OR a1 , NR c1 R d1 , C(═O)R b1 , C(═O)OR a1 , C(═O)NR c1 R d1 , and S(═O) 2 R b1 , wherein said C 1-6 alkyl is optionally substituted with 1, 2, 3, or 4 independently selected R 11 groups;

each Cy 1 is independently selected from cyclopropyl and cyclobutyl, each of which is optionally substituted with 1, 2, 3, or 4 independently selected R 11 groups;

each R a1 , R c1 , and R d1 is independently selected from H and C 1-4 alkyl; wherein said C 1-4 alkyl is optionally substituted with 1, 2, or 3 independently selected R 11 groups;

each R b1 is independently C 1-4 alkyl, which is optionally substituted with 1, 2, or 3 independently selected R 11 groups;

each R 11 is independently OH, CN, halo, cyano-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, C 1-3 alkylcarbonyl, C 1-4 alkoxycarbonyl, carbamyl, C 1-3 alkylcarbamyl, or di(C 1-3 alkyl)carbamyl.

24 . The method of claim 1 , wherein the compound is a compound of Formula II:

or a pharmaceutically acceptable salt thereof.

25 . The method of claim 1 , wherein the compound is a compound of Formula III:

or a pharmaceutically acceptable salt thereof.

26 . The method of claim 1 , wherein the compound is a compound of Formula IV:

or a pharmaceutically acceptable salt thereof, wherein:

G is NH, n is 1, and V is O; or

G is NH, n is 0, and V is O or CH 2 ; or

G is O, n is 0 and V is NH.

27 . The method of claim 1 , wherein the compound is a compound of Formula IVa:

or a pharmaceutically acceptable salt thereof.

28 . The method of claim 1 , wherein the compound is a compound of Formula IVb:

or a pharmaceutically acceptable salt thereof.

29 . The method of claim 1 , wherein the compound is a compound of Formula IVc:

or a pharmaceutically acceptable salt thereof.

30 . The method of claim 1 , wherein the compound is a compound of Formula IVd:

or a pharmaceutically acceptable salt thereof.

31 . (canceled)

32 . The method of claim 1 , or a pharmaceutically acceptable salt thereof, wherein the starred carbon in Formula I:

is a chiral carbon and said compound or said salt is the (S)-enantiomer.

33 . The method of claim 1 , wherein the compound is selected from:

1-{1-[5-Chloro-3-(1-isopropylazetidin-3-yl)-2-methoxy-4-methylphenyl]ethyl}-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-4-amine;

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

1-{1-[5-Chloro-2-methoxy-4-methyl-3-(1-propionylazetidin-3-yl)phenyl]ethyl}-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-4-amine;

1-(1-{5-Chloro-3-[1-(cyclopropylmethyl)azetidin-3-yl]-2-methoxy-4-methylphenyl}ethyl)-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-4-amine;

1-{1-[5-chloro-2-methoxy-4-methyl-3-(1-methylazetidin-3-yl)phenyl]ethyl}-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-4-amine;

1-{1-[5-Chloro-3-(1-ethylazetidin-3-yl)-2-methoxy-4-methylphenyl]ethyl}-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-4-amine;

1-{1-[5-Chloro-3-(1-isobutylazetidin-3-yl)-2-methoxy-4-methylphenyl]ethyl}-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-4-amine;

1-{1-[3-(1-sec-butylazetidin-3-yl)-5-chloro-2-methoxy-4-methylphenyl]ethyl}-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-4-amine;

1-(1-{5-Chloro-2-methoxy-3-[1-(2-methoxyethyl)azetidin-3-yl]-4-methylphenyl}ethyl)-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-4-amine;

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

1-{1-[5-Chloro-4-fluoro-3-(1-isopropylazetidin-3-yl)-2-methoxyphenyl]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,N-dimethylpyridine-2-carboxamide;

4-{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;

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

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)pyridine-2-carboxamide;

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;

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

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

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

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

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

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-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl]-5-chloro-2-methoxy-6-methylphenyl}-N,N-dimethylnicotinamide

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;

1-{1-[5-Chloro-4-fluoro-3-(1-isopropylazetidin-3-yl)-2-methoxyphenyl]ethyl}-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-4-amine;

(2S)-1-(3-{3-[1-(4-Amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl]-5-chloro-6-fluoro-2-methoxyphenyl}azetidin-1-yl)propan-2-ol;

2-(3-{3-[1-(4-Amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl]-5-chloro-6-fluoro-2-methoxyphenyl}azetidin-1-yl)ethanol;

1-{1-[5-Chloro-4-fluoro-2-methoxy-3-(1-oxetan-3-ylazetidin-3-yl)phenyl]ethyl}-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-4-amine;

1-{1-[5-Chloro-2-ethoxy-3-(1-isopropylazetidin-3-yl)-4-methylphenyl]ethyl}-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-4-amine;

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

(2S)-1-(3-{3-[1-(4-Amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl]-5-chloro-2-ethoxy-6-methylphenyl}azetidin-1-yl)propan-2-ol;

(2S)-1-(3-{3-[1-(4-Amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl]-5-chloro-2-ethoxy-6-methylphenyl}azetidin-1-yl)-1-oxopropan-2-ol;

(2S)-1-(3-{3-[1-(4-Amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl]-5-chloro-2-methoxy-6-methylphenyl}azetidin-1-yl)propan-2-ol;

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

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

1-(1-{5-Chloro-2-methoxy-4-methyl-3-[1-(2,2,2-trifluoroethyl)azetidin-3-yl]phenyl}ethyl)-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-4-amine;

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

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

(2R)-3-(3-{3-[1-(4-Amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl]-5-chloro-2-methoxy-6-methylphenyl}azetidin-1-yl)-1,1,1-trifluoropropan-2-ol;

(2S)-1-(3-{3-[1-(4-Amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl]-5-chloro-2-methoxy-6-methylphenyl}azetidin-1-yl)-1-oxopropan-2-ol;

(2R)-1-(3-{3-[1-(4-Amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl]-5-chloro-2-methoxy-6-methylphenyl}azetidin-1-yl)-1-oxopropan-2-ol;

1-{1-[5-Chloro-2-ethoxy-4-fluoro-3-(1-isopropylazetidin-3-yl)phenyl]ethyl}-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-4-amine;

1-(3-{3-[1-(4-Amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl]-5-chloro-2-ethoxy-6-fluorophenyl}azetidin-1-yl)-2-methylpropan-2-ol;

1-(1-{5-Chloro-2-ethoxy-4-fluoro-3-[1-(2,2,2-trifluoroethyl)azetidin-3-yl]phenyl}ethyl)-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-4-amine;

(2S)-1-(3-{3-[1-(4-Amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl]-5-chloro-2-ethoxy-6-fluorophenyl}azetidin-1-yl)propan-2-ol;

(2R)-2-(3-{3-[1-(4-Amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl]-5-chloro-2-methoxy-6-methylphenyl}azetidin-1-yl)propan-1-ol;

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

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

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

1-{1-[5-Chloro-2-methoxy-4-methyl-3-(1-methylpiperidin-4-yl)phenyl]ethyl}-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-4-amine;

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

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

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;

1-[1-(5-Chloro-3-{1-[2-(dimethylamino)ethyl]-1H-pyrazol-4-yl}-2-methoxy-4-methylphenyl)ethyl]-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-4-amine;

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-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;

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

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

5-[1-(4-Amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl]-4-methoxy-2-methyl-3-(1-methyl-1H-pyrazol-4-yl)benzonitrile;

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

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

4-[1-(4-Amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl]-2-azetidin-3-yl-6-chloro-3-ethoxybenzonitrile;

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

4-[1-(4-Amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl]-6-chloro-3-ethoxy-2-[1-(2-hydroxyethyl)azetidin-3-yl]benzonitrile;

4-[1-(4-Amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl]-6-chloro-3-ethoxy-2-{1-[(2S)-2-hydroxypropyl]azetidin-3-yl}benzonitrile;

tert-Butyl 2-(3-{3-[1-(4-amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl]-5-chloro-6-cyano-2-ethoxyphenyl}azetidin-1-yl)-2-methylpropanoate;

4-[1-(4-Amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl]-6-chloro-3-ethoxy-2-[1-(2-hydroxy-1,1-dimethylethyl)azetidin-3-yl]benzonitrile;

2-(3-{3-[1-(4-Amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl]-5-chloro-6-cyano-2-ethoxyphenyl}azetidin-1-yl)-2-methylpropanamide;

4-[1-(4-Amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl]-6-chloro-3-ethoxy-2-[1-(2-hydroxy-2-methylpropanoyl)azetidin-3-yl]benzonitrile;

4-[1-(4-Amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl]-2-azetidin-3-yl-6-chloro-3-methoxybenzonitrile;

4-[1-(4-Amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl]-6-chloro-3-methoxy-2-(1-methylazetidin-3-yl)benzonitrile;

4-[1-(4-Amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl]-6-chloro-2-[1-(2-hydroxyethyl)azetidin-3-yl]-3-methoxybenzonitrile;

4-[1-(4-Amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl]-6-chloro-2-{1-[(2S)-2-hydroxypropyl]azetidin-3-yl}-3-methoxybenzonitrile;

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

2-(1-Acetylazetidin-3-yl)-4-[1-(4-amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl]-6-chloro-3-methoxybenzonitrile;

4-[1-(4-Amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl]-6-chloro-3-methoxy-2-[1-(methylsulfonyl)azetidin-3-yl]benzonitrile;

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

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

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

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

1-{1-[4,5-Dichloro-3-(1-ethylazetidin-3-yl)-2-methoxyphenyl]ethyl}-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-4-amine;

4-[1-(4-Amino-5-methyl-7H-pyrrolo[2,3-d]pyrimidin-7-yl)ethyl]-6-chloro-3-ethoxy-2-(1-isopropylazetidin-3-yl)benzonitrile;

4-[-1-(4-amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl]-2-{1-[(2S)-2-hydroxypropyl]azetidin-3-yl}-3-methoxy-6-methylbenzonitrile;

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-pyrrolidin-1-ylbenzonitrile;

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

4-[1-(4-amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl]-3-ethoxy-2-(1-isopropylazetidin-3-yl)-6-methylbenzonitrile;

4-[1-(4-amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl]-3-ethoxy-2-[1-(2-hydroxy-2-methylpropyl)azetidin-3-yl]-6-methylbenzonitrile;

4-[1-(4-amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl]-3-ethoxy-2-[1-(2-hydroxy-2-methylpropanoyl)azetidin-3-yl]-6-methylbenzonitrile;

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

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

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

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

4-{3-[1-(4-amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl]-5-chloro-2-ethoxy-6-fluorophenyl}pyrrolidin-2-one;

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

4-{3-[1-(4-amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl]-5-chloro-2-ethoxy-6-fluorophenyl}-1,3-oxazolidin-2-one;

5-{3-[1-(4-amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl]-5-chloro-2-ethoxy-6-fluorophenyl}-1,3-oxazolidin-2-one; and

4-(1-(4-amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl)-6-chloro-2-(1-(2-hydroxypropyl)azetidin-3-yl)-3-methoxybenzonitrile;

or a pharmaceutically acceptable salt of any of the aforementioned.

34 - 36 . (canceled)

37 . The method of claim 1 , wherein the compound is 4-{3-[1-(4-amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl]-5-chloro-2-ethoxy-6-fluorophenyl}pyrrolidin-2-one, or a pharmaceutically acceptable salt thereof.

38 . The method of claim 1 , wherein the compound is (S)-4-(3-((S)-1-(4-amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl)-5-chloro-2-ethoxy-6-fluorophenyl)pyrrolidin-2-one, or a pharmaceutically acceptable salt thereof.

39 . The method of claim 1 , wherein the compound is (R)-4-(3-((S)-1-(4-amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl)-5-chloro-2-ethoxy-6-fluorophenyl)pyrrolidin-2-one, or a pharmaceutically acceptable salt thereof.

40 . The method of claim 1 , wherein the compound is (S)-4-(3-((R)-1-(4-amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl)-5-chloro-2-ethoxy-6-fluorophenyl)pyrrolidin-2-one, or a pharmaceutically acceptable salt thereof.

41 . The method of claim 1 , wherein the compound is (R)-4-(3-((R)-1-(4-amino-3-methyl-1H-pyrazolo[3,4-d]pyrimidin-1-yl)ethyl)-5-chloro-2-ethoxy-6-fluorophenyl)pyrrolidin-2-one, or a pharmaceutically acceptable salt thereof.

42 . The method of claim 1 , wherein the disease is autoimmune hemolytic anemia.

43 . The method of claim 37 , wherein the disease is autoimmune hemolytic anemia.

44 . The method of claim 38 , wherein the disease is autoimmune hemolytic anemia.

45 . The method of claim 39 , wherein the disease is autoimmune hemolytic anemia.

46 . The method of claim 40 , wherein the disease is autoimmune hemolytic anemia.

47 . The method of claim 41 , wherein the disease is autoimmune hemolytic anemia.

48 . The method of claim 1 , wherein the disease is pemphigus.

49 . The method of claim 37 , wherein the disease is pemphigus.

50 . The method of claim 38 , wherein the disease is pemphigus.

51 . The method of claim 39 , wherein the disease is pemphigus.

52 . The method of claim 40 , wherein the disease is pemphigus.

53 . The method of claim 41 , wherein the disease is pemphigus.

54 . The method of claim 1 , wherein the disease is myelofibrosis.

55 . The method of claim 37 , wherein the disease is myelofibrosis.

56 . The method of claim 38 , wherein the disease is myelofibrosis.

57 . The method of claim 39 , wherein the disease is myelofibrosis.

58 . The method of claim 40 , wherein the disease is myelofibrosis.

59 . The method of claim 41 , wherein the disease is myelofibrosis.