5(3)-Aminopyrazolo-3,4(4,5)-dicarboximide azo dyestuff intermediates

摘要

Compounds of the general formula I <IMAGE> I where R1 is hydrogen, unsubstituted or substituted alkyl, cycloalkyl or aryl, acyl, alkoxycarbonyl, phenoxycarbonyl, unsubstituted or substituted carbamyl, thiocarbamyl or sulfamyl, or alkylsulfonyl or arylsulfonyl, and R2 is hydrogen or a radical of a primary amine, are very useful as diazo components for the preparation of azo dyes.