Disperse-reactive dyes containing acetoxyethylsulfone or vinylsulfone and their process

The present invention relates to water insoluble disperse-reactive dyes expressed by the formula (3) and (4) and to their preparation, (3) (4) wherein each of Ar₁ and Ar₂ represents aryl or benzothiazole group, and each of R, R₁, R₂, and R₃ independently represents hydrogen, alkyl, alkoxy, cyanoalkyl or aminoacetyl group. ##STR1##