3-indolyl-4-phenyl-1H-pyrrole-2,5-dione derivatives as inhibitors of glycogen synthase kinase-3beta

Abstract

This invention relates to inhibitors of glycogen synthase kinase-3β, methods of treating diseases characterized by an excess of Th2 cytokines, and to 3-indolyl-4-phenyl-1H-pyrrole-2,5-dione derivatives of Formula (I): that are inhibitors of glycogen synthase kinase -3β, pharmaceutical compositions containing them, methods for their use and methods for preparing these compounds.

What is claimed:  
     
         1 . A compound represented by Formula (I):  
       
         
           
           
               
               
           
         
       
       wherein: 
 R 1  and R 2  independently represent hydrogen, alkyl, halo, haloalkyl, alkylthio, hydroxy, alkoxy, cyano, nitro, amino, acylamino, monoalkylamino, or dialkylamino;  
 R 3  represents hydrogen, alkyl, cycloalkyl, heteroalkyl, —COR 7  (wherein R 7  is hydrogen or alkyl), or phenyl optionally substituted with one or two substituents independently selected from the group consisting of hydrogen, alkyl, haloalkyl, alkylthio, hydroxy, alkoxy, cyano, nitro, amino, acylamino, monoalkylamino, and dialkylamino;  
 R 4  and R 5  independently represent hydrogen, alkyl, halo, haloalkyl, alkylthio, hydroxy, alkoxy, cyano, nitro, amino, acylamino, monoalkylamino, or dialkylamino;  
 R 6  is heteroalkyl, heterocyclyl, heterocyclylalkyl, heteroalkylsubstituted heterocyclyl, heteroalkylsubstituted cycloalkyl, hetereosubstituted cycloalkyl, —OR 8 , —S(O) n R 8  (wherein n is 0 to 2; and R 8  is heteroalkyl, heteroaralkyl, heterocyclyl, or heterocyclylalkyl), —NR 9 R 10  (wherein R 9  is hydrogen or alkyl and R 10  is heteroalkyl, heteroaralkyl, heterosubstituted cycloalkyl, heterocyclyl, or heterocyclylalkyl), or -X-(alkylene)—Y-Z (wherein X is a covalent bond, —O—, —NH—, or —S(O) n1−  where n1 is 0 to 2, and Y is —O—, —NH—, or —S—, and Z is heteroalkyl or SiR 11 R 12 R 13  where R 11 , R 12  and R 13  are independently hydrogen or alkyl), or R 6  together with R 4  forms a methylenedioxy or ethylenedioxy group when they are adjacent to each other; or a pharmaceutically acceptable salt thereof.  
 
     
     
         2 . The compound of  claim 1  wherein R 3  is alkyl.  
     
     
         3 . The compound of  claim 2  wherein R 3  is methyl.  
     
     
         4 . The compound of  claim 1  wherein R 6  group is at the 3-position of the phenyl ring and is heteroalkyl, heterocyclylalkyl, —OR 8  (wherein R 8  is heteroalkyl or heterocyclylalkyl), —NHR 10  (wherein R 10  is heteroalkyl, heterosubstituted cycloalkyl, heterocyclyl, or heterocyclylalkyl), or —X-(alkylene) -Y-heteroalkyl (wherein X is a covalent bond, —O— or —NH— and Y is —O— or —NH).  
     
     
         5 . The compound of  claim 4  wherein R 6  is (RS), (R) or (S) 2-hydroxy-2-hydroxymethyl-ethyloxy, 3-hydroxypropyloxy, 2-aminoethyloxy, 3-aminopropyloxy, 2-morpholin-4-ylethyloxy, or (RS), (-R) or (S) 2,2-dimethyl-1,3-dioxolan-4-ylmethyloxy.  
     
     
         6 . The compound of  claim 4  wherein R 6  is (RS), (R) or (S) 2-hydroxy-2-hydroxymethylethylamino, 2-hydroxyethylamino, 3-hydroxypropylamino, (RS), (R) or (S) 2,2-dimethyl -1,3-dioxolan-4-ylmethylamino, 2-hydroxy-1-hydroxymethylethylamino, 3-hydroxybutylamino, or tetrahydropyran-4-ylamino.  
     
     
         7 . The compound of  claim 1  wherein R 1  and R 2  are hydrogen; R 4  and R 5  are at the 2 and the 6 positions of the phenyl ring and are independently of each other hydrogen or halogen; and R 6  is at the 3-position of the phenyl ring.  
     
     
         8 . The compound of  claim 7  wherein R 3  is alkyl or hydrogen, , R 6  is —OR 8  (wherein R 8  is heteroalkyl or heterocyclylalkyl), —NHR 10  (wherein R 10  is heteroalkyl, heterosubstituted cycloalkyl, heterocyclyl, or heterocyclylalkyl), or —X-(alkylene)-Y-heteroalkyl (wherein X is a covalent bond, —O— or —NH— and Y is —O— or —NH).  
     
     
         9 . The compound of  claim 8  wherein R 3  is methyl and R 4  and R 5  are independently of each other hydrogen, chloro, or fluoro.  
     
     
         10 . The compound of  claim 9  wherein R 4  and R 5  are hydrogen.  
     
     
         11 . The compound of  claim 10  wherein R 6  is (RS), (R) or (S) 2-hydroxy-2-hydroxymethyl-ethyloxy, 3-hydroxypropyloxy, 2-aminoethyloxy, 3-aminopropyloxy, 2-morpholin-4-ylethyloxy, or (RS), (R) or (S) 2,2-dimethyl-1,3-dioxolan-4-ylmethyloxy.  
     
     
         12 . The compound of  claim 10  wherein R 6  is (RS), (R) or (S) 2-hydroxy-2-hydroxymethylethylamino, 2-hydroxyethylamino, 3-hydroxypropylamino, (RS), (R) or (S) 2,2-dimethyl -1,3-dioxolan-4-ylmethylamino, 2-hydroxy-1-hydroxymethylethylamino, 3-hydroxybutylamino, or tetrahydropyran-4-ylamino.  
     
     
         13 . The compound of  claim 1  wherein R 1  is at the 5-position of the indole ring and is halo; R 2  is hydrogen; R 4  and R 5  are at the 2 and the 6 positions of the phenyl ring and are independently of each other hydrogen or halogen; and R 6  is at the 3-position of the phenyl ring.  
     
     
         14 . The compound of  claim 13  wherein R 3  is alkyl or hydrogen,, R 6  is —OR 8  (wherein R 8  is heteroalkyl or heterocyclylalkyl), —NHR 10  (wherein R 10  is heteroalkyl, heterocyclyl, or heterocyclylalkyl), or -X-(alkylene)-Y-heteroalkyl (wherein X is a covalent bond, —O— or —NH— and Y is —O— or —NH).  
     
     
         15 . The compound of  claim 14  wherein R 1  is chloro or fluoro; R 3  is methyl; and R 4  and R 5  are independently of each other hydrogen, chloro, or fluoro.  
     
     
         16 . The compound of  claim 15  wherein R 6  is (RS), (R) or (S) 2-hydroxy-2-hydroxymethyl-ethyloxy, 3-hydroxypropyloxy, 2-aminoethyloxy, 3-aminopropyloxy, 2-morpholin-4-ylethyloxy, or (RS), (R) or (S) 2,2-dimethyl-1,3-dioxolan-4-ylmethyloxy.  
     
     
         17 . The compound of  claim 14  wherein R 6  is (RS), (R) or (S) 2-hydroxy-2-hydroxymethylethylamino, 2-hydroxyethylamino, 3-hydroxypropylamino, (RS), (R) or (S) 2,2-dimethyl -1,3-dioxolan-4-ylmethylamino, 2-hydroxy-1-hydroxymethylethylamino, 3-hydroxybutylamino, or tetrahydropyran-4-ylamino.  
     
     
         18 . A pharmaceutical composition comprising a therapeutically effective amount of a compound of  claim 1  and a pharmaceutically acceptable excipient.  
     
     
         19 . A method of treating GSK-3β mediated diseases selected from Alzheimer's disease, obesity, diabetes, atherosclerotic cardiovascular disease, polycystic ovary syndrome, syndrome X, ischemia, traumatic brain injury, bipolar disorder, immunodeficiency, cancer, allergy, and asthma in a mammal which method comprises administration to the mammal a therapeutically effective amount of a compound of  claim 1 .  
     
     
         20 . The method of  claim 19  wherein the disease is asthma.  
     
     
         21 . A method of treating a patient having a disease characterized by an excess of CD4+ Th2 cytokines, comprising administering to the patient a therapeutically effective amount of an inhibitor of GSK-3β.  
     
     
         22 . The method of  claim 21 , wherein the GSK-3β inhibitor is a compound of  claim 1 .  
     
     
         23 . The method of  claim 21 , wherein the disease is asthma, allergy or allergic rhinitis.  
     
     
         24 . The method of  claim 21 , wherein the disease is asthma.  
     
     
         25 . The method of  claim 21 , wherein the GSK-3β inhibitor is at least 10 fold more selective for GSK-3β relative to PKC.  
     
     
         26 . A method of treating a patient having a disease characterized by an excess IgE production, comprising administering to the patient a therapeutically effective amount of an inhibitor of GSK-3β.  
     
     
         27 . The method of  claim 26 , wherein the GSK-3β inhibitor is a compound of  claim 1 .  
     
     
         28 . The method of  claim 26 , wherein the disease is asthma.  
     
     
         29 . The method of  claim 26 , wherein the GSK-3β inhibitor is at least 10 fold more selective for GSK-3β relative to PKC.  
     
     
         30 . A method for preparing a compound of Formula (I) which comprises: reacting a 3-indol-3-yl-4-phenylfuran-2,5-dione of formula:  
       
         
           
           
               
               
           
         
       
       where R 1 -R 6  are as defined in  claim 1  with ammonia to provide a compound of Formula (I); or reacting a compound of formula: 
 where R 1 -R 3  are as defined in  claim 1  and R is alkyl, with a compound of formula:  
                     
 where R 4 -R 6  are as defined in  claim 1 , in the presence of a base; and  
 (iii) optionally converting a compound of Formula (I) to other compounds of Formula (I);  
 (iv) optionally converting the compound of Formula (I) prepared in Steps (i) or (ii) above, to the corresponding acid addition salt by treatment with an acid;  
 (v) optionally converting the compound of Formula (I) prepared in Steps (i) or (ii) above, to the corresponding free base by treatment with a base; and optionally separating a mixture of stereoisomers of a compound of Formula (I) prepared in Steps (i) -(v) above, to give a single stereoisomer.