4-AMINOPHENOL DERIVATIVES AND PROCESSES FOR PREPARING THE SAME

摘要

4-Aminophenol derivatives and processes for preparing the same There are disclosed a 4-aminophenol derivative of the formula: (wherein R1 and R2 each represent a lower alkyl group, Y represents a single bonding arm, a lower alkylene group or a lower alkenylene group, R3 represents a thienyl group or pyrrolyl group which may be also substituted with a lower alkyl group; benzothienyl group, indolyl group; or a phenyl group which is substituted with 1 to 2 groups selected from a lower alkoxy group and a lower alkanoyloxy group; or Y-R3 represents integrally an alkyl group with 6 to 9 carbon atoms; or a hydrocarbon group with 5 to 14 carbon atoms having 2 or 3 double bonds) or a pharmacologically acceptable salt thereof, and processes for preparing the same.