Pan-antagonists for the androgen receptor and androgen receptor mutants associated with anti-androgen withdrawal

1. A compound of the formula:

wherein R 1 is phenyl phenoxy, benzoyl, phenylthio or benzyl, said R 1 being substituted with alkyl, branched alkyl, alkoxy, branched alkoxy, aryl, aryloxy, alkylamido, alkylcarbamoyl, or acyl; said provided that, when R 1 is substituted with alkyl or branched alkyl, the alkyl or branched alkyl is further substituted with amino, alkylamino, dialkylamino, arylamino, acyl, ester, carboxyl, hydroxyl, alkoxy, sulfonyl or cyano; further provided that, when R 1 is substituted with alkoxy, branched alkoxy, aryl, aryloxy, alkylamido, alkylcarbamoyl, or acyl, the alkoxy, branched alkoxy, aryl, aryloxy, alkylamido, alkylcarbamoyl, or acyl is further optionally substituted with alkyl, amino, alkylamino, dialkylamino, arylamino, acyl, ester, carboxyl, hydroxyl, alkoxy, sulfonyl or cyano.

2. The compound of claim 1 , wherein said compound is selected from the group consisting of:

wherein R 2 is alkyl, alkoxy, aryl, branched alkyl, branched alkyloxy, alkylamino, dialkylamino, aryloxy, arylamino, acyl, alkylamido, or alkylcarbamoyl, provided that, when R 2 is alkyl or branched alkyl, the alkyl or branched alkyl is substituted with amino, alkylamino, dialkylamino, carboxyl, ester, hydroxy, alkoxy, sulfonyl or cyano; further provided that, when R 2 is alkoxy, aryl, branched alkyloxy, alkylamino, dialkylamino, aryloxy, arylamino, acyl, alkylamido, or alkylcarbamoyl is optionally substituted with alkyl, amino, alkylamino, dialkylamino, carboxyl, ester, hydroxy, alkoxy, sulfonyl or cyano.

3. The compound of claim 2 , selected from the group consisting of:

4. A pharmaceutical composition comprising a compound of claim 1 .