Patent ID: 6235903
Filing Date: 2001-05-22
Classification: A61P,C07C,C07D

Abstract:
A process for preparing carboxylic acid derivatives of the general formula I ##STR8##whereR.sup.1 is hydroxyl, alkoxy, sulfonamidyl, amino,R.sup.2 is alkyl, aryl or hetaryl, optionally substituted,R.sup.3, R.sup.4, R.sup.5 are identical to or different from one another and are alkyl or aryl, optionally substituted,by nucleophilic reaction of a carboxylic acid derivative of the formula II with a sulfide of the formula III ##STR9##whereX is SR.sup.6 or SO.sub.2 R.sup.6,R.sup.6 is alkyl or aryl, optionally substituted.