Purine inhibitors of human phosphatidylinositol 3-kinase delta

1. A compound or a pharmaceutically acceptable salt, wherein the compound is

4-[(1S,4R)-5-(3-cyanophenyl)-2,5-diazabicyclo[2.2.1]hept-2-yl]-2-(1-methyl-1H-pyrazol-4-yl)pyrimidine-5-carbonitrile;

4-[(1R,4S)-5-(3-fluorophenyl)-2,5-diazabicyclo[2.2.1]hept-2-yl]-2-pyrazolo[1,5-a]pyridin-3-ylpyrimidine-5-carbonitrile;

2-(4,6-dihydropyrrolo[3,4-c]pyrazol-5(1H)-yl)-4-[(1S,4R)-5-(3-fluorophenyl)-2,5-diazabicyclo[2.2.1]hept-2-yl]pyrimidine-5-carbonitrile;

4-{(1S,4R)-5-[6-(difluoromethyl)pyridin-3-yl]-2,5-diazabicyclo[2.2.1]hept-2-yl}-2-(1-methyl-1H-pyrazol-4-yl)pyrimidine-5-carbonitrile;

4-{(1S,4R)-5-[3-(1-hydroxy-1-methylethyl)phenyl]-2,5-diazabicyclo[2.2.1]hept-2-yl}-2-(1-methyl-1H-pyrazol-4-yl)pyrimidine-5-carbonitrile;

2-(1-methyl-1H-pyrazol-4-yl)-4-[(1S,4R)-5-pyridin-3-yl-2,5-diazabicyclo[2.2.1]hept-2-yl]pyrimidine-5-carbonitrile;

4-[(1S,4S)-5-(3-fluorophenyl)-2,5-diazabicyclo[2.2.1]hept-2-yl]-2-(1H-pyrazol-4-yl)pyrimidine-5-carbonitrile;

4-{(1S,4R)-5-[3-(2-fluoroethoxy)phenyl]-2,5-diazabicyclo[2.2.1]hept-2-yl}-2-(1-methyl-1H-pyrazol-4-yl)pyrimidine-5-carbonitrile;

2-(1-methyl-1H-pyrazol-4-yl)-4-{(1S,4R)-5-[3-(1H-pyrrol-1-yl)phenyl]-2,5-diazabicyclo[2.2.1]hept-2-yl}pyrimidine-5-carbonitrile;

2-(1-methyl-1H-pyrazol-4-yl)-4-[(1S,4R)-5-(3-nitrophenyl)-2,5-diazabicyclo[2.2.1]hept-2-yl]pyrimidine-5-carbonitrile;

4-[(1S,4R)-5-(3-cyclopropylphenyl)-2,5-diazabicyclo[2.2.1]hept-2-yl]-2-(1-methyl-1H-pyrazol-4-yl)pyrimidine-5-carbonitrile;

4-{(1S,4R)-5-[3-(1-methylcyclopropyl)phenyl]-2,5-diazabicyclo[2.2.1]hept-2-yl}-2-(1-methyl-1H-pyrazol-4-yl)pyrimidine-5-carbonitrile;

3-{(1R,4S)-5-[5-cyano-2-(1-methyl-1H-pyrazol-4-yl)pyrimidin-4-yl]-2,5-diazabicyclo[2.2.1]hept-2-yl}-N-methylbenzamide;

4-[(1S,4R)-5-(3-methoxyphenyl)-2,5-diazabicyclo[2.2.1]hept-2-yl]-2-(1-methyl-1H-pyrazol-4-yl)pyrimidine-5-carbonitrile;

2-(1-methyl-1H-pyrazol-4-yl)-4-{(1S,4R)-5-[3-(methylsulfonyl)phenyl]-2,5-diazabicyclo[2.2.1]hept-2-yl}pyrimidine-5-carbonitrile;

4-[(1S,4S)-5-(3-fluorophenyl)-2,5-diazabicyclo[2.2.1]hept-2-yl]-2-(1-methyl-H-pyrazol-4-yl)pyrimidine-5-carbonitrile;

4-[(1R,4S)-5-(3-fluorophenyl)-2,5-diazabicyclo[2.2.1]hept-2-yl]-2-(1H-pyrrolo[2,3-b]pyridin-4-yl)pyrimidine-5-carbonitrile;

4-[(1R,4S)-5-(3-fluorophenyl)-2,5-diazabicyclo[2.2.1]hept-2-yl]-2-(1H-pyrrolo[2,3-b]pyridin-5-yl)pyrimidine-5-carbonitrile;

4-[(1R,4S)-5-(3-fluorophenyl)-2,5-diazabicyclo[2.2.1]hept-2-yl]-2-(5-methylpyridin-3-yl)pyrimidine-5-carbonitrile;

4-[(1R,4S)-5-(3-fluorophenyl)-2,5-diazabicyclo[2.2.1]hept-2-yl]-2-(1H-indazol-4-yl)pyrimidine-5-carbonitrile;

4-[(1R,4S)-5-(3-fluorophenyl)-2,5-diazabicyclo[2.2.1]hept-2-yl]-2-isoquinolin-5-ylpyrimidine-5-carbonitrile;

4-[(1S,4R)-5-(3-fluorophenyl)-2,5-diazabicyclo[2.2.1]hept-2-yl]-2-(1,4,6,7-tetrahydro-5H-pyrazolo[4,3-c]pyridin-5-yl)pyrimidine-5-carbonitrile;

4-[(1S,4R)-5-(3-fluorophenyl)-2,5-diazabicyclo[2.2.1]hept-2-yl]-2-morpholin-4-ylpyrimidine-5-carbonitrile;

4-[(1S,4R)-5-(cyclopropylcarbonyl)-2,5-diazabicyclo[2.2.1]hept-2-yl]-2-(1-methyl-1H-pyrazol-4-yl)pyrimidine-5-carbonitrile;

4-[(1S,4R)-5-(cyclopropylsulfonyl)-2,5-diazabicyclo[2.2.1]hept-2-yl]-2-(1-methyl-1H-pyrazol-4-yl)pyrimidine-5-carbonitrile;

4-[(1S,4R)-5-(cyclopropylmethyl)-2,5-diazabicyclo[2.2.1]hept-2-yl]-2-(1-methyl-1H-pyrazol-4-yl)pyrimidine-5-carbonitrile;

(1R,4S)-5-[5-cyano-2-(1-methyl-1H-pyrazol-4-yl)pyrimidin-4-yl]-N-ethyl-2,5-diazabicyclo[2.2.1]heptane-2-carboxamide;

4-[(1S,4R)-5-(2,2-dimethylpropanoyl)-2,5-diazabicyclo[2.2.1]hept-2-yl]-2-(1-methyl-H-pyrazol-4-yl)pyrimidine-5-carbonitrile;

4-[(1S,4R)-5-(3-fluoro-2,2-dimethylpropanoyl)-2,5-diazabicyclo[2.2.1]hept-2-yl]-2-(1-methyl-1H-pyrazol-4-yl)pyrimidine-5-carbonitrile;

4-{(1S,4R)-5-[(3-methyloxetan-3-yl)carbonyl]-2,5-diazabicyclo[2.2.1]hept-2-yl}-2-(1-methyl-1H-pyrazol-4-yl)pyrimidine-5-carbonitrile;

4-[(1S,4R)-5-{[1-(methoxymethyl)cyclopropyl]carbonyl}-2,5-diazabicyclo[2.2.1]hept-2-yl]-2-(1-methyl-1H-pyrazol-4-yl)pyrimidine-5-carbonitrile;

4-[(1S,4R)-5-(cyclobutylcarbonyl)-2,5-diazabicyclo[2.2.1]hept-2-yl]-2-(1-methyl-H-pyrazol-4-yl)pyrimidine-5-carbonitrile;

2-(1-methyl-1H-pyrazol-4-yl)-4-[(1S,4R)-5-(thiophen-2-ylcarbonyl)-2,5-diazabicyclo[2.2.1]hept-2-yl]pyrimidine-5-carbonitrile;

2-(1-methyl-1H-pyrazol-4-yl)-4-[(1S,4R)-5-(1,3-oxazol-4-ylcarbonyl)-2,5-diazabicyclo[2.2.1]hept-2-yl]pyrimidine-5-carbonitrile;

2-(1-methyl-1H-pyrazol-4-yl)-4-[(1S,4R)-5-(oxetan-3-ylacetyl)-2,5-diazabicyclo[2.2.1]hept-2-yl]pyrimidine-5-carbonitrile;

4-{(1S,4R)-5-[(1-methylethyl)sulfonyl]-2,5-diazabicyclo[2.2.1]hept-2-yl}-2-(1-methyl-1H-pyrazol-4-yl)pyrimidine-5-carbonitrile;

2-(1-methyl-1H-pyrazol-4-yl)-4-[(1S,4R)-5-(propylsulfonyl)-2,5-diazabicyclo[2.2.1]hept-2-yl]pyrimidine-5-carbonitrile;

4-[(1S,4R)-5-(cyclopentylsulfonyl)-2,5-diazabicyclo[2.2.1]hept-2-yl]-2-(1-methyl-1H-pyrazol-4-yl)pyrimidine-5-carbonitrile;

4-[(1S,4R)-5-(3-fluoropropyl)-2,5-diazabicyclo[2.2.1]hept-2-yl]-2-(1-methyl-H-pyrazol-4-yl)pyrimidine-5-carbonitrile;

4-[4-(3-fluorophenyl)-3,3-dimethylpiperazin-1-yl]-2-(1-methyl-1H-pyrazol-4-yl)pyrimidine-5-carbonitrile;

4-[4-(3-fluorophenyl)piperazin-1-yl]-2-(1-methyl-1H-pyrazol-4-yl)pyrimidine-5-carbonitrile;

4-[(3R)-4-(3-fluorophenyl)-3-methylpiperazin-1-yl]-2-(1-methyl-1H-pyrazol-4-yl)pyrimidine-5-carbonitrile;

4-[8-(3-fluorophenyl)-3,8-diazabicyclo[3.2.1]oct-3-yl]-2-(1-methyl-1H-pyrazol-4-yl)pyrimidine-5-carbonitrile;

4-[(3R)-4-(cyclopropylcarbonyl)-3-methylpiperazin-1-yl]-2-(1-methyl-1H-pyrazol-4-yl)pyrimidine-5-carbonitrile;

4-[(3R)-3-methyl-4-propanoylpiperazin-1-yl]-2-(1-methyl-1H-pyrazol-4-yl)pyrimidine-5-carbonitrile;

4-[(3R)-4-(cyclobutylcarbonyl)-3-methylpiperazin-1-yl]-2-(1-methyl-1H-pyrazol-4-yl)pyrimidine-5-carbonitrile;

4-{(3R)-3-methyl-4-[(1-methylcyclopropyl)carbonyl]piperazin-1-yl}-2-(1-methyl-1H-pyrazol-4-yl)pyrimidine-5-carbonitrile;

4-{(3R)-4-[(2,2-difluorocyclobutyl)carbonyl]-3-methylpiperazin-1-yl}-2-(1-methyl-1H-pyrazol-4-yl)pyrimidine-5-carbonitrile;

4-[(3R)-4-(cyclopentylcarbonyl)-3-methylpiperazin-1-yl]-2-(1-methyl-1H-pyrazol-4-yl)pyrimidine-5-carbonitrile;

2-(1-methyl-1H-pyrazol-4-yl)-4-[(3R)-3-methyl-4-(spiro[2.4]hept-1-ylcarbonyl)piperazin-1-yl]pyrimidine-5-carbonitrile;

4-[(3R)-3-methyl-4-{[(1R,2R)-2-methylcyclopropyl]carbonyl}piperazin-1-yl]-2-(1-methyl-1H-pyrazol-4-yl)pyrimidine-5-carbonitrile;

4-[(3R)-3-methyl-4-{[(1S,2R)-2-methylcyclopropyl]carbonyl}piperazin-1-yl]-2-(1-methyl-1H-pyrazol-4-yl)pyrimidine-5-carbonitrile;

4-[(3R)-4-(3-fluorophenyl)-3-methylpiperazin-1-yl]-2-(1-methyl-1H-pyrazol-4-yl)pyrimidine-5-carbonitrile;

4-[(3R)-3-methyl-4-(3-nitrophenyl)piperazin-1-yl]-2-(1-methyl-1H-pyrazol-4-yl)pyrimidine-5-carbonitrile;

4-[(3R)-4-(3-cyanophenyl)-3-methylpiperazin-1-yl]-2-(1-methyl-1H-pyrazol-4-yl)pyrimidine-5-carbonitrile;

4-{(3R)-3-methyl-4-[3-(methylsulfonyl)phenyl]piperazin-1-yl}-2-(1-methyl-1H-pyrazol-4-yl)pyrimidine-5-carbonitrile;

3-{2-[(3R)-4-(cyclopropylcarbonyl)-3-methylpiperazin-1-yl]-4-(1-methyl-1H-pyrazol-4-yl)pyrimidin-5-yl}prop-2-yn-1-ol;

2-[(3R)-4-(cyclopropylcarbonyl)-3-methylpiperazin-1-yl]-6-(1-methyl-1H-pyrazol-4-yl)pyrimidine-4-carbonitrile;

6-[(3R)-4-(cyclopropylcarbonyl)-3-methylpiperazin-1-yl]-2-(1-methyl-1H-pyrazol-4-yl)pyrimidine-4-carbonitrile;

2-[(3R)-4-(cyclopropylcarbonyl)-3-methylpiperazin-1-yl]-4-(1-methyl-1H-pyrazol-4-yl)pyrimidine-5-carbonitrile;

2-[(3R)-4-(cyclopropylcarbonyl)-3-methylpiperazin-1-yl]-5-[5-(1-methylethyl)-1,3-oxazol-2-yl]-4-(1-methyl-1H-pyrazol-4-yl)pyrimidine;

4-[(3R)-4-(cyclopropylcarbonyl)-3-(2-methylpropyl)piperazin-1-yl]-2-(1-methyl-H-pyrazol-4-yl)pyrimidine-5-carbonitrile;

4-[(3S)-4-(cyclopropylcarbonyl)-3-(hydroxymethyl)piperazin-1-yl]-2-(1-methyl-1H-pyrazol-4-yl)pyrimidine-5-carbonitrile;

2-[(3R)-4-(cyclopropylcarbonyl)-3-methylpiperazin-1-yl]-5-(3-methylbut-1-yn-1-yl)-4-(1-methyl-1H-pyrazol-4-yl)pyrimidine;

2-[(3R)-4-(cyclopropylcarbonyl)-3-methylpiperazin-1-yl]-5-ethynyl-4-(1-methyl-1H-pyrazol-4-yl)pyrimidine;

2-[(3R)-4-(cyclopropylcarbonyl)-3-methylpiperazin-1-yl]-4-(1-methyl-1H-pyrazol-4-yl)-5-(methylsulfanyl)pyrimidine;

2-[(3R)-4-(cyclopropylcarbonyl)-3-methylpiperazin-1-yl]-5-(difluoromethyl)-4-(1-methyl-1H-pyrazol-4-yl)pyrimidine;

ethyl 2-[(3R)-4-(cyclopropylcarbonyl)-3-methylpiperazin-1-yl]-4-(1-methyl-1H-pyrazol-4-yl)pyrimidine-5-carboxylate;

5-chloro-4-[(3R)-4-(cyclopropylcarbonyl)-3-methylpiperazin-1-yl]-2-(1-methyl-1H-pyrazol-4-yl)pyrimidine;

4-amino-6-[(3R)-4-(cyclopropylcarbonyl)-3-methylpiperazin-1-yl]-2-(1-methyl-1H-pyrazol-4-yl)pyrimidine-5-carbonitrile;

1-{5-cyano-6-[(3R)-4-(cyclopropylcarbonyl)-3-methylpiperazin-1-yl]-2-(1-methyl-1H-pyrazol-4-yl)pyrimidin-4-yl}-3-(1-methylethyl)urea;

N-{5-cyano-6-[(3R)-4-(cyclopropylcarbonyl)-3-methylpiperazin-1-yl]-2-(1-methyl-1H-pyrazol-4-yl)pyrimidin-4-yl}acetamide;

4-[(3R)-4-(cyclopropylcarbonyl)-3-methylpiperazin-1-yl]-2-(1-methyl-1H-pyrazol-4-yl)-6-[(2,2,2-trifluoroethyl)amino]pyrimidine-5-carbonitrile;

4-chloro-6-[(3R)-4-(cyclopropylcarbonyl)-3-methylpiperazin-1-yl]-2-(1-methyl-1H-pyrazol-4-yl)pyrimidine-5-carbonitrile;

4-[(3R)-4-(cyclopropylcarbonyl)-3-methylpiperazin-1-yl]-6-ethyl-2-(1-methyl-1H-pyrazol-4-yl)pyrimidine-5-carbonitrile;

4-(cyclobutylamino)-6-[(3R)-4-(cyclopropylcarbonyl)-3-methylpiperazin-1-yl]-2-(1-methyl-1H-pyrazol-4-yl)pyrimidine-5-carbonitrile;

4-[(3R)-4-(cyclopropylcarbonyl)-3-methylpiperazin-1-yl]-2-(1-methyl-1H-pyrazol-4-yl)-6-(phenylamino)pyrimidine-5-carbonitrile;

4-chloro-2-[(3R)-4-(cyclopropylcarbonyl)-3-methylpiperazin-1-yl]-6-(1-methyl-1H-pyrazol-4-yl)pyrimidine-5-carbonitrile;

4-[(3R)-4-(cyclopropylcarbonyl)-3-methylpiperazin-1-yl]-6-methyl-2-(1-methyl-1H-pyrazol-4-yl)pyrimidine-5-carbonitrile;

4-[(3R)-4-(cyclopropylcarbonyl)-3-methylpiperazin-1-yl]-2-[1-methyl-5-(3,3,3-trifluoropropyl)-1H-pyrazol-4-yl]pyrimidine-5-carbonitrile;

2-[(3R)-4-(cyclopropylcarbonyl)-3-methylpiperazin-1-yl]-4-(2-methoxyethyl)-6-(1-methyl-1H-pyrazol-4-yl)pyrimidine-5-carbonitrile;

4-(3-cyano-1-methyl-1H-pyrazol-4-yl)-2-[(3R)-4-(cyclopropylcarbonyl)-3-methylpiperazin-1-yl]pyrimidine-5-carbonitrile;

4-(3-amino-1-methyl-1H-pyrazol-4-yl)-2-[(3R)-4-(cyclopropylcarbonyl)-3-methylpiperazin-1-yl]pyrimidine-5-carbonitrile;

4-[(3R)-4-(cyclopropylcarbonyl)-3-methylpiperazin-1-yl]-2-(5,6-dihydro-4H-pyrrolo[1,2-b]pyrazol-3-yl)pyrimidine-5-carbonitrile;

1-{5-cyano-6-[(3R)-4-(cyclopropylcarbonyl)-3-methylpiperazin-1-yl]-2-(1-methyl-1H-pyrazol-4-yl)pyrimidin-4-yl}-3-(2,2,2-trifluoroethyl)urea;

1-{5-cyano-6-[(3R)-4-(cyclopropylcarbonyl)-3-methylpiperazin-1-yl]-2-(1-methyl-1H-pyrazol-4-yl)pyrimidin-4-yl}-3-cyclobutylurea;

4-[(3R)-4-(cyclopropylcarbonyl)-3-methylpiperazin-1-yl]-2-(1-methyl-1H-pyrazol-4-yl)-6-[(oxetan-3-ylmethyl)amino]pyrimidine-5-carbonitrile;

4-[(3R)-4-(cyclopropylcarbonyl)-3-methylpiperazin-1-yl]-2-(1-methyl-1H-pyrazol-4-yl)-6-[(3,3,3-trifluoropropyl)amino]pyrimidine-5-carbonitrile;

4-[(3R)-4-(cyclopropylcarbonyl)-3-methylpiperazin-1-yl]-6-[(1-methylethyl)amino]-2-(1-methyl-1H-pyrazol-4-yl)pyrimidine-5-carbonitrile;

4-[(3R)-4-(cyclopropylcarbonyl)-3-methylpiperazin-1-yl]-6-[(2-methylpropyl)amino]-2-(1-methyl-1H-pyrazol-4-yl)pyrimidine-5-carbonitrile;

4-[(3R)-4-(cyclopropylcarbonyl)-3-methylpiperazin-1-yl]-2-(1-methyl-1H-pyrazol-4-yl)-6-(2,2,2-trifluoroethoxy)pyrimidine-5-carbonitrile;

4-[(3R)-4-(cyclopropylcarbonyl)-3-methylpiperazin-1-yl]-2-(1-methyl-1H-pyrazol-4-yl)-6-[3-(trifluoromethyl)azetidin-1-yl]pyrimidine-5-carbonitrile;

4-[(3R)-4-(cyclopropylcarbonyl)-3-methylpiperazin-1-yl]-2-(1-methyl-1H-pyrazol-4-yl)-6-propylpyrimidine-5-carbonitrile;

2-[(3R)-4-(cyclopropylcarbonyl)-3-methylpiperazin-1-yl]-4-(1-methyl-1H-pyrazol-4-yl)-6-propylpyrimidine-5-carbonitrile;

2-[(3R)-4-(cyclopropylcarbonyl)-3-methylpiperazin-1-yl]-4-(1-methyl-1H-pyrazol-4-yl)-6-(3,3,3-trifluoropropyl)pyrimidine-5-carbonitrile;

4-cyclopropyl-2-[(3R)-4-(cyclopropylcarbonyl)-3-methylpiperazin-1-yl]-6-(1-methyl-1H-pyrazol-4-yl)pyrimidine-5-carbonitrile;

4-[(3R)-4-(cyclopropylcarbonyl)-3-methylpiperazin-1-yl]-2-(1,3-dimethyl-1H-pyrazol-4-yl)pyrimidine-5-carbonitrile;

4-[(3R)-4-(cyclopropylcarbonyl)-3-methylpiperazin-1-yl]-2-(1,5-dimethyl-1H-pyrazol-4-yl)pyrimidine-5-carbonitrile; or

4-[(3R)-4-(cyclopropylcarbonyl)-3-methylpiperazin-1-yl]-2-[1-(difluoromethyl)-1H-pyrazol-4-yl]pyrimidine-5-carbonitrile.

2. A pharmaceutical composition comprising an effective amount of a compound according to claim 1 , or a pharmaceutically acceptable salt thereof, and a pharmaceutically acceptable carrier.

3. The pharmaceutical composition according to claim 2 , further comprising one or more other therapeutic agents.