Compounds of the general formula I ##STR1## where R.sup.1 is hydrogen, unsubstituted or substituted alkyl, cycloalkyl or aryl, acyl, alkoxycarbonyl, phenoxycarbonyl, unsubstituted or substituted carbamyl, thiocarbamyl or sulfamyl, or alkylsulfonyl or arylsulfonyl, and R.sup.2 is hydrogen or a radical of a primary amine, are very useful as diazo components for the preparation of azo dyes.
通式为I ##STR1## 的化合物,其中R.sup.1是氢、未取代或取代的烷基、环烷基或芳基、酰基、烷氧羰基、苯氧羰基、未取代或取代的
氨基甲酰基、
硫氨基甲酰基或磺酰基烷基或芳基,R.sup.2是氢或一级胺基团,可作为重要的重氮化合物用于制备偶氮
染料。