Phosphatidylinositol 3-kinase inhibitors

Abstract

The present disclosure provides phosphatidylinositol 3-kinase (PI3K) inhibitors of formula (I), or pharmaceutically acceptable salts thereof, in which n, m, R 1 , R 2 , and R 3 are as defined herein. These compounds are useful for treatment of conditions mediated by one or more PI3K isoforms, such as PI3Kδ. The present disclosure further provides pharmaceutical compositions that include a compound of formula (I), or pharmaceutically acceptable salts thereof, and methods of using these compounds and compositions to treat conditions mediated by one or more PI3K isoforms, such as PI3Kδ.

What is claimed is: 
     
         1 . A compound having the structure of formula (I): 
       
         
           
           
               
               
           
         
       
       or a pharmaceutically acceptable salt thereof, wherein:
 n is 0, 1, 2, or 3; 
 each R 1  is independently halo, cyano, unsubstituted or substituted alkyl, unsubstituted or substituted haloalkyl, unsubstituted or substituted alkoxy, hydroxy, unsubstituted or substituted cycloalkyl, SO 2 R 1r , or C(O)NR 1s R 1t , wherein each R 1r , R 1s  and R 1t  is independently hydrogen or unsubstituted or substituted alkyl; 
 m is 0, 1, 2, or 3; 
 each R 2  is independently halo, cyano, unsubstituted or substituted alkyl, unsubstituted or substituted haloalkyl, or unsubstituted or substituted alkoxy; and 
 R 3  is hydrogen or unsubstituted or substituted alkyl. 
 
     
     
         2 . The compound of  claim 1 , or a pharmaceutically acceptable salt thereof, wherein each R 1  is independently fluoro, chloro, cyano, methyl, CHF 2 , CF 3 , methoxy, or hydroxy. 
     
     
         3 . The compound of  claim 1 , or a pharmaceutically acceptable salt thereof, wherein n is 1 or 2. 
     
     
         4 . The compound of  claim 1 , or a pharmaceutically acceptable salt thereof, wherein each R 2  is independently fluoro, chloro, iodo, cyano, methoxy, CHF 2 , or CF 3 . 
     
     
         5 . The compound of  claim 1 , or a pharmaceutically acceptable salt thereof, wherein m is 1 or 2. 
     
     
         6 . The compound of  claim 1 , or a pharmaceutically acceptable salt thereof, wherein R 3  is methyl or ethyl. 
     
     
         7 . The compound of  claim 1 , or a pharmaceutically acceptable salt thereof, wherein:
 n is 1, 2, or 3;   each R 1  is independently halo, cyano or unsubstituted or substituted alkyl;   m is 1, 2, or 3;   each R 2  is independently halo or cyano; and   R 3  is unsubstituted or substituted alkyl.   
     
     
         8 . The compound of  claim 1 , or a pharmaceutically acceptable salt thereof, wherein:
 n is 1;   R 1  is halo;   m is 2;   each R 2  is independently halo;   R 3  is unsubstituted or substituted alkyl.   
     
     
         9 . The compound of  claim 1 , or a pharmaceutically acceptable salt thereof, wherein the compound is the (S)-enantiomer. 
     
     
         10 . The compound of  claim 1 , or a pharmaceutically acceptable salt thereof, wherein n is 2 and m is 2, and the compound is of formula (IA-1): 
       
         
           
           
               
               
           
         
       
       or a pharmaceutically acceptable salt thereof, wherein:
 each R 1a , R 1b  is independently halo, cyano, unsubstituted or substituted alkyl, unsubstituted or substituted haloalkyl, unsubstituted or substituted alkoxy, hydroxy, or unsubstituted or substituted cycloalkyl; 
 each R 2a  and R 2b  is independently halo, cyano, unsubstituted or substituted alkyl, unsubstituted or substituted haloalkyl, or unsubstituted or substituted alkoxy; and 
 R 3  is unsubstituted or substituted alkyl. 
 
     
     
         11 . The compound of  claim 10 , or a pharmaceutically acceptable salt thereof, wherein:
 each R 1a  and R 1b  is independently hydrogen, halo, cyano, or unsubstituted or substituted alkyl; and   each R 2a  and R 2b  is independently hydrogen, halo, or cyano.   
     
     
         12 . The compound of  claim 1 , or a pharmaceutically acceptable salt thereof, wherein n is 1 and m is 2, and the compound is of formula (IB-1): 
       
         
           
           
               
               
           
         
       
       or a pharmaceutically acceptable salt thereof, wherein:
 R 1a  is halo, cyano, unsubstituted or substituted alkyl, or haloalkyl; 
 each R 2a  and R 2b  is independently hydrogen, halo or cyano; and 
 R 3  is unsubstituted or substituted alkyl. 
 
     
     
         13 . The compound of  claim 1 , or a pharmaceutically acceptable salt thereof, wherein n is 1 and m is 2, and the compound is of formula (IB-4): 
       
         
           
           
               
               
           
         
       
       or a pharmaceutically acceptable salt thereof, wherein:
 R 1a  is halo, cyano, unsubstituted or substituted alkyl, or haloalkyl; 
 each R 2a  and R 2b  is independently hydrogen, halo or cyano; and 
 R 3  is unsubstituted alkyl. 
 
     
     
         14 . A pharmaceutical composition comprising:
 a compound of  claim 1  or a pharmaceutically acceptable salt thereof; and   at least one pharmaceutically acceptable vehicle.   
     
     
         15 . A compound selected from the group consisting of:
 (S)-2,4-diamino-6-((1-(5-chloro-3-(3,5-difluorophenyl)-4-oxo-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(5-hydroxy-4-oxo-3-phenyl-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(8-methyl-4-oxo-3-phenyl-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(5-chloro-8-methyl-4-oxo-3-phenyl-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(5-chloro-3-(3-chlorophenyl)-8-methyl-4-oxo-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(3-(3-chlorophenyl)-8-methyl-4-oxo-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2-(1-((2,6-diamino-5-cyanopyrimidin-4-yl)amino)ethyl)-4-oxo-3-phenyl-3,4-dihydroquinazoline-5-carbonitrile;   (S)-2,4-diamino-6-((1-(5-chloro-3-(3-chlorophenyl)-4-oxo-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(6-fluoro-4-oxo-3-phenyl-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(3-(3,5-difluorophenyl)-5-fluoro-4-oxo-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(3-(3,5-difluorophenyl)-6-fluoro-4-oxo-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(5-chloro-3-(3-cyanophenyl)-4-oxo-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(3-(3-cyanophenyl)-6-fluoro-4-oxo-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(3-(3-chlorophenyl)-6-fluoro-4-oxo-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(5-chloro-3-(3,5-difluorophenyl)-8-fluoro-4-oxo-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(3-(3,5-difluorophenyl)-8-fluoro-4-oxo-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(3-(3,5-difluorophenyl)-8-fluoro-4-oxo-3,4-dihydroquinazolin-2-yl)propyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(3-(3,5-difluorophenyl)-5-methyl-4-oxo-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(3-(3,5-difluorophenyl)-5-methyl-4-oxo-3,4-dihydroquinazolin-2-yl)propyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(5-chloro-3-(3-cyano-5-fluorophenyl)-4-oxo-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(3-(3,5-difluorophenyl)-5,8-difluoro-4-oxo-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(8-chloro-4-oxo-3-phenyl-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(5-methyl-4-oxo-3-phenyl-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(3-(3-cyano-5-fluorophenyl)-5-methyl-4-oxo-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(3-(3,5-difluorophenyl)-8-fluoro-5-methyl-4-oxo-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(3-(3,5-difluorophenyl)-6-fluoro-4-oxo-3,4-dihydroquinazolin-2-yl)propyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(3-(3,5-difluorophenyl)-5,8-difluoro-4-oxo-3,4-dihydroquinazolin-2-yl)propyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(3-(3,5-difluorophenyl)-4-oxo-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(3-(3,5-difluorophenyl)-5,6-difluoro-4-oxo-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(3-(3,5-difluorophenyl)-5,6-difluoro-4-oxo-3,4-dihydroquinazolin-2-yl)propyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(3-(3-cyano-5-fluorophenyl)-8-fluoro-5-methyl-4-oxo-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(3-(3-cyano-5-fluorophenyl)-5-fluoro-4-oxo-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(5-fluoro-3-(3-fluoro-5-(trifluoromethyl)phenyl)-4-oxo-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(3-(3,5-difluorophenyl)-4-oxo-8-(trifluoromethyl)-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(3-(3,5-difluorophenyl)-5-fluoro-8-methyl-4-oxo-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(3-(3,5-difluorophenyl)-4-oxo-3,4-dihydroquinazolin-2-yl)propyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(3-(3,5-difluorophenyl)-5-fluoro-8-methyl-4-oxo-3,4-dihydroquinazolin-2-yl)propyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(3-(3-cyanophenyl)-5-fluoro-4-oxo-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(8-methyl-4-oxo-3-(3-(trifluoromethyl)phenyl)-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(5-fluoro-4-oxo-3-(3-(trifluoromethyl)phenyl)-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(5-chloro-3-(3,5-dichlorophenyl)-4-oxo-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(3-(3,5-dichlorophenyl)-5-fluoro-4-oxo-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(5-chloro-3-(3-chloro-5-fluorophenyl)-4-oxo-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(3-(3-chloro-5-fluorophenyl)-5-fluoro-4-oxo-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(5-chloro-3-(3-fluoro-5-(trifluoromethyl)phenyl)-4-oxo-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(5-fluoro-4-oxo-3-(3-(trifluoromethyl)phenyl)-3,4-dihydroquinazolin-2-yl)propyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(5-chloro-4-oxo-3-(3-(trifluoromethyl)phenyl)-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(5-chloro-3-(3-cyano-5-fluorophenyl)-8-fluoro-4-oxo-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(5-chloro-4-oxo-3-phenyl-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(5,8-dichloro-4-oxo-3-phenyl-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(5-chloro-3-(3,5-dimethoxyphenyl)-4-oxo-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(5-(difluoromethyl)-3-(3,5-difluorophenyl)-4-oxo-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(5-(difluoromethyl)-3-(3,5-difluorophenyl)-4-oxo-3,4-dihydroquinazolin-2-yl)propyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(3-(3-(difluoromethyl)-5-fluorophenyl)-5-fluoro-4-oxo-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(5-chloro-3-(3-(difluoromethyl)-5-fluorophenyl)-4-oxo-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(8-(difluoromethyl)-4-oxo-3-phenyl-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(8-(difluoromethyl)-3-(3,5-difluorophenyl)-4-oxo-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(8-fluoro-4-oxo-3-phenyl-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(5,8-difluoro-4-oxo-3-phenyl-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(8-fluoro-5-methyl-4-oxo-3-phenyl-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(5-fluoro-8-methyl-4-oxo-3-phenyl-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(5-(difluoromethyl)-4-oxo-3-phenyl-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(3-(3-cyanophenyl)-5-(difluoromethyl)-4-oxo-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(3-(3-cyanophenyl)-8-fluoro-5-methyl-4-oxo-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(3-(3-(difluoromethyl)-5-fluorophenyl)-5-fluoro-4-oxo-3,4-dihydroquinazolin-2-yl)propyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(5-chloro-3-(3-(difluoromethyl)-5-fluorophenyl)-4-oxo-3,4-dihydroquinazolin-2-yl)propyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(8-chloro-3-(3,5-difluorophenyl)-5-fluoro-4-oxo-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(3-(3,5-difluorophenyl)-8-methoxy-4-oxo-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(3-(3,5-difluorophenyl)-6,8-difluoro-4-oxo-3,4-dihydroquinazolin-2-yl)propyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(3-(3,5-difluorophenyl)-6,8-difluoro-4-oxo-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(8-chloro-3-(3,5-difluorophenyl)-4-oxo-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(8-chloro-3-(3,5-difluorophenyl)-4-oxo-3,4-dihydroquinazolin-2-yl)propyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(5-chloro-3-(3,5-difluorophenyl)-8-methyl-4-oxo-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(5,8-dichloro-3-(3,5-difluorophenyl)-4-oxo-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(3-(3,5-difluorophenyl)-8-methyl-4-oxo-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(3-(3,5-difluorophenyl)-8-methyl-4-oxo-3,4-dihydroquinazolin-2-yl)propyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(3-(3,5-difluorophenyl)-5-fluoro-4-oxo-3,4-dihydroquinazolin-2-yl)propyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(5-chloro-3-(3,5-difluorophenyl)-4-oxo-3,4-dihydroquinazolin-2-yl)propyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(3-(3,5-difluorophenyl)-6,7-difluoro-4-oxo-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   2,4-diamino-6-(((3-(3,5-difluorophenyl)-6,7-difluoro-4-oxo-3,4-dihydroquinazolin-2-yl)methyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(5-fluoro-4-oxo-3-phenyl-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(3-(3-cyanophenyl)-5-fluoro-8-methyl-4-oxo-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(3-(3-cyano-5-fluorophenyl)-5-fluoro-8-methyl-4-oxo-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   2,4-diamino-6-(((8-chloro-3-(3-cyanophenyl)-4-oxo-3,4-dihydroquinazolin-2-yl)methyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(6-chloro-3-(3,5-difluorophenyl)-5-fluoro-4-oxo-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(6-chloro-3-(3,5-difluorophenyl)-5-fluoro-4-oxo-3,4-dihydroquinazolin-2-yl)propyl)amino)pyrimidine-5-carbonitrile;   (S)-5-(5-chloro-2-(1-((2,6-diamino-5-cyanopyrimidin-4-yl)amino)ethyl)-4-oxoquinazolin-3(4H)-yl)isophthalonitrile;   (S)-2,4-diamino-6-((1-(3-(3,5-bis(trifluoromethyl)phenyl)-5-fluoro-4-oxo-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(8-chloro-3-(3,5-difluorophenyl)-6-fluoro-4-oxo-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-(1-(5-chloro-3-(3,5-difluorophenyl)-4-oxo-3,4-dihydroquinazolin-2-yl)ethylamino)pyrimidine-5-carboxamide;   (S)-5-chloro-2-(1-(2,6-diamino-5-chloropyrimidin-4-ylamino)ethyl)-3-phenylquinazolin-4(3H)-one;   (S)-2-(1-(2,6-diamino-5-chloropyrimidin-4-ylamino)propyl)-3-(3,5-difluorophenyl)-5-fluoroquinazolin-4(3H)-one;   (S)-2,4-diamino-6-(1-(5-chloro-3-(3-(difluoromethyl)-5-fluorophenyl)-4-oxo-3,4-dihydroquinazolin-2-yl)ethylamino)pyrimidine-5-carboxamide;   (S)-5-chloro-2-(1-(2,6-diamino-5-(methylsulfonyl)pyrimidin-4-ylamino)ethyl)-3-(3,5-difluorophenyl)quinazolin-4(3H)-one;   (S)-2,4-diamino-6-(1-(5-(methylsulfonyl)-4-oxo-3-phenyl-3,4-dihydroquinazolin-2-yl)ethylamino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-(1-(3-(3,5-difluorophenyl)-5-(methylsulfonyl)-4-oxo-3,4-dihydroquinazolin-2-yl)ethylamino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-(1-(3-(3-(difluoromethyl)phenyl)-5-fluoro-4-oxo-3,4-dihydroquinazolin-2-yl)ethylamino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-(1-(3-(3-(difluoromethyl)-5-fluorophenyl)-5-(methylsulfonyl)-4-oxo-3,4-dihydroquinazolin-2-yl)ethylamino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-(1-(5-(difluoromethyl)-3-(3-(difluoromethyl)-5-fluorophenyl)-4-oxo-3,4-dihydroquinazolin-2-yl)ethylamino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-(1-(5-chloro-3-(3-(difluoromethyl)phenyl)-4-oxo-3,4-dihydroquinazolin-2-yl)ethylamino)pyrimidine-5-carboxamide;   (S)-2-(1-((2,6-diamino-5-cyanopyrimidin-4-yl)amino)ethyl)-3-(3,5-difluorophenyl)-4-oxo-3,4-dihydroquinazoline-8-carbonitrile;   (S)-2,4-diamino-6-((1-(8-chloro-3-(3,5-difluorophenyl)-5-fluoro-4-oxo-3,4-dihydroquinazolin-2-yl)propyl)amino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-((1-(3-(3,5-difluorophenyl)-8-ethyl-4-oxo-3,4-dihydroquinazolin-2-yl)ethyl)amino)pyrimidine-5-carbonitrile;   (S)-5-chloro-2-(1-((2,6-diamino-5-chloropyrimidin-4-yl)amino)ethyl)-3-phenylquinazolin-4(3H)-one;   (S)-2-(1-((2,6-diamino-5-chloropyrimidin-4-yl)amino)propyl)-3-(3,5-difluorophenyl)-5-fluoroquinazolin-4(3H)-one;   (S)-2,4-diamino-6-(1-(5-chloro-3-(3-(difluoromethyl)phenyl)-4-oxo-3,4-dihydroquinazolin-2-yl)ethylamino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-(1-(5-chloro-3-(3-isopropylphenyl)-4-oxo-3,4-dihydroquinazolin-2-yl)ethylamino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-(1-(5-chloro-3-(3-fluorophenyl)-4-oxo-3,4-dihydroquinazolin-2-yl)ethylamino)pyrimidine-5-carbonitrile;   (S)-2,4-diamino-6-(1-(5-chloro-3-(3-methoxy-2-methylphenyl)-4-oxo-3,4-dihydroquinazolin-2-yl)ethylamino)pyrimidine-5-carbonitrile; and   (S)-2,4-diamino-6-(1-(5-chloro-3-(5-fluoro-3-methoxy-2-methylphenyl)-4-oxo-3,4-dihydroquinazolin-2-yl)ethylamino)pyrimidine-5-carbonitrile,   or a pharmaceutically acceptable salt thereof.   
     
     
         16 . A pharmaceutical composition comprising:
 a compound of  claim 15  or a pharmaceutically acceptable salt thereof; and   at least one pharmaceutically acceptable vehicle.   
     
     
         17 . A method for treating a human, who has or is suspected of having a disease or condition responsive or believed to be responsive to the inhibition of PI3Kδ activity, comprising administering to the human a compound of  claim 1  or a pharmaceutically acceptable salt thereof. 
     
     
         18 . The method of  claim 17 , wherein the disease or condition is an inflammatory disorder, an autoimmune disease, or a cancer. 
     
     
         19 . The method of  claim 17 , wherein the disease or condition is lymphoma, multiple myeloma, or leukemia. 
     
     
         20 . The method of  claim 17 , wherein the disease or condition is acute lymphocytic leukemia (ALL), acute myeloid leukemia (AML), chronic lymphocytic leukemia (CLL), small lymphocytic lymphoma (SLL), myelodysplastic syndrome (MDS), myeloproliferative disease (MPD), chronic myeloid leukemia (CML), multiple myeloma (MM), non-Hodgkin's lymphoma (NHL), mantle cell lymphoma (MCL), follicular lymphoma, Waldestrom's macroglobulinemia (WM), T-cell lymphoma, B-cell lymphoma, diffuse large B-cell lymphoma (DLBCL), pancreatic cancer, bladder cancer, colorectal cancer, breast cancer, prostate cancer, renal cancer, hepatocellular cancer, lung cancer, ovarian cancer, cervical cancer, gastric cancer, esophageal cancer, head and neck cancer, melanoma, neuroendocrine cancer, CNS cancer, brain cancer, bone cancer, soft tissue sarcoma, non-small cell lung cancer, small-cell lung cancer, colon cancer, systemic lupus erythematosus (SLE), myestenia gravis, rheumatoid arthritis (RA), acute disseminated encephalomyelitis, idiopathic thrombocytopenic purpura, multiple sclerosis (MS), Sjoegren's syndrome, autoimmune hemolytic anemia, asthma, rheumatoid arthritis, multiple sclerosis, or lupus.