Isoxazolo [4,5-d] pyrimidines as CRF antagonists

Abstract

The present invention describes novel isoxazolo[1,5-a]pyrimidines of formula: wherein R is an aromatic or heteroaromatic ring, or pharmaceutically acceptable salt form thereof, which are useful as CRF antagonists.

What is claimed as new and desired to be secured by Letter Patent of United States is:  
     
         1 . A compound of formula (I):  
       
         
           
           
               
               
           
         
       
       or a stereoisomer or pharmaceutically acceptable salt form thereof, wherein: 
 R is selected from phenyl, naphthyl, pyridyl, pyrimidinyl, triazinyl, furanyl, quinolinyl, isoquinolinyl, thienyl, imidazolyl, thiazolyl, indolyl, pyrrolyl, oxazolyl, benzofuranyl, benzothienyl, benzthiazolyl, isoxazolyl and pyrazolyl, and is substituted with 0-5 R 3  groups;  
 R 1  is selected from H, C 1-4  alkyl, C 2-4  alkenyl, C 2-4  alkynyl, halo, —CN, C 1-4  haloalkyl, NR 6 R 7 , NR 8 COR 9 , —OR 10 , SH and —S(O) n R 11 ;  
 R 2  is selected from NR 6a R 7a  and OR 10a ;  
 R 3  is independently selected at each occurrence from C 1-10  alkyl substituted with 0-2 R a , C 2-10  alkenyl substituted with 0-2 R a , C 2-10  alkynyl substituted with 0-2 R a , C 3-6  cycloalkyl substituted with 0-2 R a , (C 3-6  cycloalkyl)C 1-4  alkyl substituted with 0-2 R a , —NO 2 , halo, —CN, C 1-4  haloalkyl, —NR 6 R 7 , —NR 8 COR 13a , —NR 8 C(O)OR 13a , —COR 13 , —OR 10a , —CONR 6 R 7 , —NR 8 CONR 6 R 7 , —C(O)OR 10a , SH, and —S(O) n R 12 ;  
 R a  is independently selected at each occurrence from C 1-4  alkyl, —NO 2 , halo, —CN, —NR 6 R 7 , —NR 8 COR 13a , —NR 8 C(O)OR 13a , —COR 13 , —OR 10a , —CONR 6 R 7 , —NR 8 CONR 6 R 7 , —C(O)OR 10a , SH, and —S(O) n R 12 ;  
 R 6  is independently at each occurrence selected from H, C 1-4  alkyl, C 3-6  cycloalkyl and (C 3-6  cycloalkyl)methyl;  
 R 6a  is independently selected at each occurrence from H, C 1-6  alkyl substituted with 0-2 R b , C 2-6  alkenyl substituted with 0-2 R b , C 2-6  alkynyl substituted with 0-2 R b , C 1-4  haloalkyl, C 3-6  cycloalkyl substituted with 0-2 R b , (C 3-6  cycloalkyl)C 1-4  alkyl substituted with 0-2 R b , aryl substituted with 0-2 R b , (aryl)C 1-4  alkyl substituted with 0-2 R b , heteroaryl substituted with 0-2 R b , (heteroaryl)C 1-4  alkyl substituted with 0-2 R b , heterocyclyl substituted with 0-2 R b , and (heterocyclyl)C 1-4  alkyl substituted with 0-2 R b ;  
 R b  is independently selected at each occurrence from C 1-4  alkyl, —NO 2 , halo, —CN, —NR 6b R 7a , —NR 8 COR 13a , —NR 8 C(O)OR 13a , —COR 13 , —OR 10a , —CONR 6b R 7a , —NR 8 CONR 6b R 7a , —C(O)OR 10a , SH, and —S(O) n R 12 ;  
 R 6b  is independently at each occurrence selected from H, C 1-4  alkyl, C 3-6  cycloalkyl and (C 3-6  cycloalkyl)methyl;  
 R 7  is independently at each occurrence selected from H, C 1-4  alkyl, C 3-6  cycloalkyl and (C 3-6  cycloalkyl)methyl;  
 R 7a  is independently selected at each occurrence from H, C 1-6  alkyl, phenyl, benzyl, C 3-6  cycloalkyl, (C 3-6  cycloalkyl)methyl, and C 1-4  haloalkyl;  
 alternatively, NR 6a R 7a  is selected from piperidine, pyrrolidine, morpholine, thiomorpholine, thiomorpholine-oxide, and thiomorpholine-dioxide, and is substituted with 0-1 R e ;  
 R e  is C 1-4  alkyl;  
 alternatively, NR 6a R 7a  is piperazine or N-methylpiperazine, and is substituted with 0-1 R f ;  
 R f  is selected from C 1-4  alkyl, C(O)C 1-4  alkyl, C(O)benzyl, C(O)OC 1-4  alkyl, C(O)O-benzyl, SO 2 —C 1-4  alkyl, SO 2 -benzyl, and SO 2 -phenyl;  
 R 8  is independently at each occurrence selected from H, C 1-4  alkyl, C 3-6  cycloalkyl and (C 3-6  cycloalkyl)C 1-4  alkyl;  
 R 9  is independently at each occurrence selected from H, C 1-4  alkyl, C 3-6  cycloalkyl and (C 3-6  cycloalkyl)C 1-4  alkyl;  
 R 10  is independently at each occurrence selected from H, C 1-4  alkyl, C 1-4  haloalkyl, C 3-6  cycloalkyl, and (C 3-6  cycloalkyl)C 1-4  alkyl;  
 R 10a  is independently selected at each occurrence from H, C 1-6  alkyl, phenyl, benzyl, C 3-6  cycloalkyl, (C 3-6  cycloalkyl)C 1-4  alkyl, (C 1-4  alkoxy)C 1-4  alkyl, and C 1-4  haloalkyl;  
 R 10b  is independently selected at each occurrence from H, C 1-6  alkyl, C 2-4  alkenyl, phenyl, benzyl, C 3-6  cycloalkyl, (C 3-6  cycloalkyl)C 1-4  alkyl, (C 1-4  alkoxy)C 1-4  alkyl, and C 1-4  haloalkyl;  
 R 11  is independently at each occurrence selected from C 1-4  alkyl, C 1-4  haloalkyl, and C 3-6  cycloalkyl;  
 R 12  is independently at each occurrence selected from C 1-4  alkyl, C 1-4  haloalkyl, (C 1-4  alkoxy)C 1-4  alkyl, C 3-6  cycloalkyl, (C 3-6  cycloalkyl)C 1--4  alkyl, aryl, and (aryl)C 1-4  alkyl;  
 R 13  is independently at each occurrence selected from H, C 1-6  alkyl, phenyl, benzyl, C 3-6  cycloalkyl, and (C 3-6  cycloalkyl)C 1-4  alkyl;  
 R 13a  is independently at each occurrence selected from C 1-6  alkyl, phenyl, benzyl, C 3-6  cycloalkyl, and (C 3-6  cycloalkyl)C 1-4  alkyl;  
 aryl is independently at each occurrence selected from phenyl and naphthyl, and is substituted with 0-3 R g ;  
 R g  is independently at each occurrence selected from C 1-6  alkyl, C 3-6  cycloalkyl, halo, C 1-4  haloalkyl, cyano, nitro, —OR 10a , SH, —S(O) n R 15 , —COR 16 , —C(O)OR 16 , —OC(O)R 17 , —NR 8 COR 16a , —NR 8 CONR 6a R 7a , —NR 8 C(O)OR 16a , —NR 6a R 7a , and —CONR 6a R 7a ;  
 R 15  is independently at each occurrence selected from C 1-4  alkyl, C 1-4  haloalkyl, (C 1-4  alkoxy)C 1-4  alkyl, C 3-6  cycloalkyl, (C 3-6  cycloalkyl)C 1-4  alkyl, phenyl, benzyl, (phenyl)C 1-4  alkyl and (naphthyl)C 1-4  alkyl;  
 R 16  is independently at each occurrence selected from H, C 1-6  alkyl, phenyl, benzyl, C 3-6  cycloalkyl, and (C 3-6  cycloalkyl)C 1-4  alkyl;  
 R 16a  is independently at each occurrence selected from C 1-6  alkyl, phenyl, benzyl, C 3-6  cycloalkyl, and (C 3-6  cycloalkyl)C 1-4  alkyl;  
 R 17  is independently at each occurrence selected from C 1-4  alkyl, C 1-4  haloalkyl, (C 1-4  alkoxy)C 1-4  alkyl, C 3-6  cycloalkyl, (C 3-6  cycloalkyl)C 1-4  alkyl, phenyl, benzyl, (phenyl)C 1-4  alkyl, (naphthyl)C 1-4  alkyl, heteroaryl and (heteroaryl)C 1-4  alkyl;  
 heteroaryl is independently at each occurrence selected from pyridyl, pyrimidinyl, triazinyl, furanyl, quinolinyl, isoquinolinyl, thienyl, imidazolyl, thiazolyl, indolyl, pyrrolyl, oxazolyl, benzofuranyl, benzothienyl, benzthiazolyl, isoxazolyl, pyrazolyl, triazolyl, tetrazolyl, and indazolyl, and is substituted with 0-3 R h ;  
 heterocyclyl is saturated or partially saturated heteroaryl, substituted with 0-3 R h ; and  
 R h  is independently at each occurrence selected from C 1-6  alkyl, C 3-6  cycloalkyl, halo, C 1-4  haloalkyl, cyano, nitro, —OR 10a , SH, —S(O) n R 15 , —COR 16 , —C(O)OR 16 , —OC(O)R 18 , NR 8 COR 16a , —NR 8 CONR 6a R 7a , —NR 8 CO 2 R 16a , —NR 6a R 7a , and —CONR 6a R 7a ;  
 R 18  is independently selected at each occurrence from C 1-6  alkyl, C 3-6  cycloalkyl, phenyl and benzyl; and  
 n is independently at each occurrence selected from 0, 1 and 2.  
 
     
     
         2 . A compound according to  claim 1 , wherein: 
 R is selected from phenyl and pyridyl, and is substituted with 0-5 R 3  groups;    R 1  is selected from H, CH 3 , CH 2 CH 3 , Cl, F, Br, —CN, CF 3 , NH 2 , NH(CH 3 ), N(CH 3 ) 2 , OH, OCH 3 , SH, SCH 3 , and S(O) 2 CH 3 ;    R 2  is NR 6a R 7a ; and,    R 3  is independently selected at each occurrence from C 1-6  alkyl substituted with 0-2 R a , C 2-6  alkenyl substituted with 0-2 R a , C 2-6  alkynyl substituted with 0-2 R a , C 3-6  cycloalkyl substituted with 0-2 R a , (C 3-6  cycloalkyl)C 1-2  alkyl substituted with 0-2 R a , —NO 2 , halo, —CN, C 1-4  haloalkyl, —NR 6 R 7 , —NR 8 COR 13a , —COR 13 , —OR 10a , —CONR 6 R 7 , —C(O)OR 10a , and —S(O) n R 12 .    
     
     
         3 . A compound according to  claim 2 , wherein: 
 R is selected from phenyl and pyridyl, and is substituted with 1-3 R 3  groups;    R 1  is selected from H, CH 3 , CH 2 CH3, Cl, and F;    R 3  is independently selected at each occurrence from C 1-6  alkyl substituted with 0-2 R a , C 2-6  alkenyl substituted with 0-2 R a , C 2-6  alkynyl substituted with 0-2 R a , C 3-6  cycloalkyl substituted with 0-2 R a , (C 3-6  cycloalkyl)C 1-2  alkyl substituted with 0-2 R a , F, Cl, C 1-4  haloalkyl, —NR 6 R 7 , —NR 8 COR 13a , —COR 13 , —OR 10a , —CONR 6 R 7 , —C(O)OR 10 , and —S(O) n R 12      R a  is independently selected at each occurrence from C 1-4  alkyl, —NO 2 , F, Cl, —CN, —NR 6 R 7 , —NR 8 COR 13a , —COR 13 , —OR 10a , CONR 6a R 7a , —C(O)OR 10a , and —S(O) n R 12 ;    R 6a  is independently selected at each occurrence from C 1-6  alkyl substituted with 0-2 R b , C 2-6  alkenyl substituted with 0-2 R b , C 2-6  alkynyl substituted with 0-2 R b , C 3-6  cycloalkyl substituted with 0-2 R b , (C 3-6  cycloalkyl)C 1-4  alkyl substituted with 0-2 R b , (aryl)C 1-4  alkyl substituted with 0-2 R b , (heteroaryl)C 1-4  alkyl substituted with 0-2 R b , and (heterocyclyl)C 1-4  alkyl substituted with 0-2 R b ;    R b  is independently selected at each occurrence from C 1-4  alkyl, —NO 2 , F, Cl, —CN, —NR 6b R 7a , —NR 8 COR 13a , —COR 13 , —OR 10a , —CONR 6b R 7a , C(O)OR 10a , and —S(O) n R 12 ; and,    R 7a  is independently selected at each occurrence from H, C 1-6  alkyl, benzyl, and (C 3-6  cycloalkyl)methyl.    
     
     
         4 . A compound according to  claim 3 , wherein: 
 R 1  is CH 3 ;    R 3  is independently selected at each occurrence from C 1-6  alkyl substituted with 0-2 R a , C 2-6  alkenyl substituted with 0-2 R a , C 2-6  alkynyl substituted with 0-2 R a , C 3-6  cycloalkyl substituted with 0-2 R a , (C 3-6  cycloalkyl)C 1-2  alkyl substituted with 0-2 R a , —NO 2 , halo, —CN, C 1-4  haloalkyl, —NR 6 R 7 , —NR 8 COR 13a , —COR 13 , —OR 10a , —CONR 6 R 7 , —C(O)OR 10a , and —S(O) n R 12 ;    R a  is independently selected at each occurrence from C 1-4  alkyl, —NO 2 , F, Cl, —CN, —NR 6 R 7 , —NR 8 COR 13a , —COR 13 , —OR 10a , —CONR 6 R 7 , —C(O)OR 10a , and —S(O) n R 12 ;    R 6a  is independently selected at each occurrence from C 2-4  alkyl substituted with 0-2 R b , (C 3-5  cycloalkyl)C 1-2  alkyl substituted with 0-2 groups selected from CH 3 O and CH 3 CH 2 O, (aryl)C 1-2  alkyl substituted with 0-2 R b , (heteroaryl)C 1-2  alkyl substituted with 0-2 R b , and (heterocyclyl)C 1-2  alkyl substituted with 0-2 R b ;    R b  is independently selected at each occurrence from C 1-4  alkyl, —NO 2 , F, Cl, —CN, —NR 6b R 7a , —NR 8 COR 13a , —COR 13 , —OR 10a , —CONR 6b R 7a , —C(O)OR 10a , and —S(O) n R 12 ;    R 8  is independently at each occurrence selected from H, C 1-4  alkyl, C 3-6  cycloalkyl and (C 3-6  cycloalkyl)C 1-2  alkyl;    R 9  is independently at each occurrence selected from H, C 1-4  alkyl, C 3-6  cycloalkyl and (C 3-6  cycloalkyl)C 1-2  alkyl;    R 10  is independently at each occurrence selected from H, C 1-4  alkyl, C 1-4  haloalkyl, C 3-6  cycloalkyl, and (C 3-6  cycloalkyl)C 1-2  alkyl;    R 10a  is independently selected at each occurrence from H, C 1-6  alkyl, phenyl, benzyl, C 3-6  cycloalkyl, (C 3-6  cycloalkyl)C 1-2  alkyl, (C 1-4  alkoxy)C 1-2  alkyl, and C 1-4  haloalkyl;    R 10b  is independently selected at each occurrence from H, C 1-6  alkyl, C 2-4  alkenyl, phenyl, benzyl, C 3-6  cycloalkyl, (C 3-6  cycloalkyl)C 1-2  alkyl, (C 1-4  alkoxy)C 1-2  alkyl, and C 1-4  haloalkyl;    R 11  is independently at each occurrence selected from C 1-4  alkyl, C 1-4  haloalkyl, and C 3-6  cycloalkyl;    R 12  is independently at each occurrence selected from C 1-4  alkyl, C 1-4  haloalkyl, (C 1-4  alkoxy)C 1-2  alkyl, C 3-6  cycloalkyl, (C 3-6  cycloalkyl)C 1-2  alkyl, aryl, and (aryl)C 1-2  alkyl;    R 13a  is independently at each occurrence selected from C 1-6  alkyl, phenyl, benzyl, C 3-6  cycloalkyl, and (C 3-6  cycloalkyl)C 1-2  alkyl; aryl is independently at each occurrence phenyl substituted with 0-3 R g ;    R g  is independently at each occurrence selected from C 1-4  alkyl, C 3-6  cycloalkyl, F, Cl, C 1-4  haloalkyl, cyano, nitro, —OR 10a , —S(O) n R 15 , —COR 16 , —C(O)OR 16 , —NR 8 COR 16a , —NR 6a R 7a , and —CONR 6a R 7a ;    R 15  is independently at each occurrence selected from C 1-4  alkyl, C 1-4  haloalkyl, (C 1-4  alkoxy)C 1-4  alkyl, C 3-6  cycloalkyl, (C 3-6  cycloalkyl)C 1-4  alkyl, phenyl, benzyl, and (phenyl)C 1-2  alkyl;    R 16  is independently at each occurrence selected from H, C 1-4  alkyl, phenyl, benzyl, C 3-6  cycloalkyl, and (C 3-6  cycloalkyl)C 1-2  alkyl;    R 16a  is independently at each occurrence selected from C 1-4  alkyl, phenyl, benzyl, C 3-6  cycloalkyl, and (C 3-6  cycloalkyl)C 1-2  alkyl;    heteroaryl is independently at each occurrence selected from pyridyl, pyrimidinyl, furanyl, imidazolyl, thiazolyl, pyrrolyl, oxazolyl, isoxazolyl, pyrazolyl, triazolyl, and tetrazolyl, and is substituted with 0-3 R h ; and    heterocyclyl is saturated or partially saturated heteroaryl, substituted with 0-3 R h ; and,    R h  is independently at each occurrence selected from C 1-6  alkyl, C 3-6  cycloalkyl, F, Cl, C 1-4  haloalkyl, cyano, nitro, —OR 10a , —S(O) n R 15 , —COR 16 , —C(O)OR 16 , —NR 8 COR 16a , —NR 6a R 7a  and —CONR 6a R 7a .    
     
     
         5 . A compound according to  claim 1 , wherein the compound is selected from the group: 
 3-(2,4-dichlorophenyl)-5-methyl-7-(3-pentyl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dichlorophenyl)-5-methyl-7-(methoxybut-2-yl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dichlorophenyl)-5-methyl-7-(1,3-bis(methoxy)prop-2-yl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dichlorophenyl)-5-methyl-7-(di(methoxyethyl)amino)-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dichlorophenyl)-5-methyl-7-(N-ethyl-N-butyl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dichlorophenyl)-5-methyl-7-(N-ethyl-N-propyl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dichlorophenyl)-5-methyl-7-diethylamino-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dichlorophenyl)-5-methyl-7-dipropylamino-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dichlorophenyl)-5-methyl-7-(N-ethyl-N-cyclopropylmethyl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dichlorophenyl)-5-methyl-7-(N-propyl-N-cyclopropylmethyl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dichlorophenyl)-5-methyl-7(N-butyl-N-cyclopropylmethyl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dichlorophenyl)-5-methyl-7-di(cyclopropylmethyl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dichlorophenyl)-5-methyl-7-(N-ethyl-N-cyclopropyl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dichlorophenyl)-5-methyl-7-(N-propyl-N-cyclopropyl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dichlorophenyl)-5-methyl-7-(N-butyl-N-cyclopropyl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dichlorophenyl)-5-methyl-7-dicyclopropylamino-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dichlorophenyl)-5-methyl-7-(N-cyclopropyl-N-cyclopropylmethyl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dichlorophenyl)-5-methyl-7-(cyclopropylbut-2-yl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dichlorophenyl)-5-methyl-7-(cyclopropylpent-2-yl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dichlorophenyl)-5-methyl-7-((1,3-dicyclopropyl)prop-2-yl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dichlorophenyl)-5-methyl-7-(cyclopropylpropyl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dichlorophenyl)-5-methyl-7-(cyclopropylbutyl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dichlorophenyl)-5-methyl-7-(dicyclopropylmethyl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dichlorophenyl)-5-methyl-7-((1,2-dicyclopropyl)ethyl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dichlorophenyl)-5-methyl-7-(1-hydroxy-but-2-yl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dichlorophenyl)-5-methyl-7-(morpholino)-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dichlorophenyl)-5-methyl-7-(3-pentoxy)-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dichlorophenyl)-5-methyl-7-(methoxybut-2-oxy)-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dichlorophenyl)-5-methyl-7-(cyclopropylbut-2-oxy)-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dichlorophenyl)-5-methyl-7-(cyclopropylpropoxy)-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dichlorophenyl)-5-methyl-7-(dicyclopropylmethoxy)-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dichlorophenyl)-5-methyl-7-(2-methoxy-1-cyclopropylethoxy)-isoxazolo[4,5-d]pyrimidine;    3-(2,4,6-trimethylphenyl)-5-methyl-7-(3-pentyl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4,6-trimethylphenyl)-5-methyl-7-(methoxybut-2-yl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4,6-trimethylphenyl)-5-methyl-7-(1,3-bis(methoxy)prop-2-yl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4,6-trimethylphenyl)-5-methyl-7-(di(methoxyethyl)amino)-isoxazolo[4,5-d]pyrimidine;    3-(2,4,6-trimethylphenyl)-5-methyl-7-(N-ethyl-N-butyl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4,6-trimethylphenyl)-5-methyl-7-(N-ethyl-N-propyl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4,6-trimethylphenyl)-5-methyl-7-diethylamino-isoxazolo[4,5-d]pyrimidine;    3-(2,4,6-trimethylphenyl)-5-methyl-7-dipropylamino-isoxazolo[4,5-d]pyrimidine;    3-(2,4,6-trimethylphenyl)-5-methyl-7-(N-ethyl-N-cyclopropylmethyl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4,6-trimethylphenyl)-5-methyl-7-(N-propyl-N-cyclopropylmethyl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4,6-trimethylphenyl)-5-methyl-7(N-butyl-N-cyclopropylmethyl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4,6-trimethylphenyl)-5-methyl-7-di(cyclopropylmethyl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4,6-trimethylphenyl)-5-methyl-7-(N-ethyl-N-cyclopropyl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4,6-trimethylphenyl)-5-methyl-7-(N-propyl-N-cyclopropyl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4,6-trimethylphenyl)-5-methyl-7-(N-butyl-N-cyclopropyl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4,6-trimethylphenyl)-5-methyl-7-dicyclopropylamino-isoxazolo[4,5-d]pyrimidine;    3-(2,4,6-trimethylphenyl)-5-methyl-7-(N-cyclopropyl-N-cyclopropylmethyl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4,6-trimethylphenyl)-5-methyl-7-(cyclopropylbut-2-yl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4,6-trimethylphenyl)-5-methyl-7-(cyclopropylpent-2-yl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4,6-trimethylphenyl)-5-methyl-7-((1,3-dicyclopropyl)prop-2-yl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4,6-trimethylphenyl)-5-methyl-7-(cyclopropylpropyl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4,6-trimethylphenyl)-5-methyl-7-(cyclopropylbutyl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4,6-trimethylphenyl)-5-methyl-7-(dicyclopropylmethyl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4,6-trimethylphenyl)-5-methyl-7-((1,2-dicyclopropyl)ethyl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4,6-trimethylphenyl)-5-methyl-7-(1-hydroxy-but-2-yl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4,6-trimethylphenyl)-5-methyl-7-(morpholino)-isoxazolo[4,5-d]pyrimidine;    3-(2,4,6-trimethylphenyl)-5-methyl-7-(3-pentoxy)-isoxazolo[4,5-d]pyrimidine;    3-(2,4,6-trimethylphenyl)-5-methyl-7-(methoxybut-2-oxy)-isoxazolo[4,5-d]pyrimidine;    3-(2,4,6-trimethylphenyl)-5-methyl-7-(cyclopropylbut-2-oxy)-isoxazolo[4,5-d]pyrimidine;    3-(2,4,6-trimethylphenyl)-5-methyl-7-(cyclopropylpropoxy)-isoxazolo[4,5-d]pyrimidine;    3-(2,4,6-trimethylphenyl)-5-methyl-7-(dicyclopropylmethoxy)-isoxazolo[4,5-d]pyrimidine;    3-(2,4,6-trimethylphenyl)-5-methyl-7-(2-methoxy-1-cyclopropylethoxy)-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dimethylphenyl)-5-methyl-7-(3-pentyl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dimethylphenyl)-5-methyl-7-(methoxybut-2-yl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dimethylphenyl)-5-methyl-7-(1,3-bis(methoxy)prop-2-yl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dimethylphenyl)-5-methyl-7-(di(methoxyethyl)amino)-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dimethylphenyl)-5-methyl-7-(N-ethyl-N-butyl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dimethylphenyl)-5-methyl-7-(N-ethyl-N-propyl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dimethylphenyl)-5-methyl-7-diethylamino-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dimethylphenyl)-5-methyl-7-dipropylamino-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dimethylphenyl)-5-methyl-7-(N-ethyl-N-cyclopropylmethyl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dimethylphenyl)-5-methyl-7-(N-propyl-N-cyclopropylmethyl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dimethylphenyl)-5-methyl-7(N-butyl-N-cyclopropylmethyl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dimethylphenyl)-5-methyl-7-di(cyclopropylmethyl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dimethylphenyl)-5-methyl-7-(N-ethyl-N-cyclopropyl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dimethylphenyl)-5-methyl-7-(N-propyl-N-cyclopropyl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dimethylphenyl)-5-methyl-7-(N-butyl-N-cyclopropyl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dimethylphenyl)-5-methyl-7-dicyclopropylamino-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dimethylphenyl)-5-methyl-7-(N-cyclopropyl-N-cyclopropylmethyl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dimethylphenyl)-5-methyl-7-(cyclopropylbut-2-yl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dimethylphenyl)-5-methyl-7-(cyclopropylpent-2-yl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dimethylphenyl)-5-methyl-7-((1,3-dicyclopropyl)prop-2-yl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dimethylphenyl)-5-methyl-7-(cyclopropylpropyl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dimethylphenyl)-5-methyl-7-(cyclopropylbutyl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dimethylphenyl)-5-methyl-7-(dicyclopropylmethyl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dimethylphenyl)-5-methyl-7-((1,2-dicyclopropyl)ethyl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dimethylphenyl)-5-methyl-7-(1-hydroxy-but-2-yl)amino-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dimethylphenyl)-5-methyl-7-(morpholino)-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dimethylphenyl)-5-methyl-7-(3-pentoxy)-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dimethylphenyl)-5-methyl-7-(methoxybut-2-oxy)-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dimethylphenyl)-5-methyl-7-(cyclopropylbut-2-oxy)-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dimethylphenyl)-5-methyl-7-(cyclopropylpropoxy)-isoxazolo[4,5-d]pyrimidine;    3-(2,4-dimethylphenyl)-5-methyl-7-(dicyclopropylmethoxy)-isoxazolo[4,5-d]pyrimidine; and,    3-(2,4-dimethylphenyl)-5-methyl-7-(2-methoxy-1-cyclopropylethoxy)isoxazolo[4,5-d]pyrimidine;    or a pharmaceutically acceptable salt form thereof.