A process for the manufacture of the heterocyclic compounds of the formula: ##SPC1## Wherein R is a hydrogen atom or a hydrocarbon radical, which comprises decarboxylating and dinitrating a compound of the formula: ##SPC2## Wherein R has the meaning stated above, and finally hydrolysing off the acyl group, and the use of the said heterocyclic compounds as diazo components in the production of azo dyestuffs.
一种制造
杂环化合物的方法,其
化学式为:##
SPC1## 其中R是氢原子或烃基团,包括将化合物##
SPC2## 脱羧并二硝化,其中R具有上述含义,最后
水解去除酰基团。所述
杂环化合物用作偶氮
染料生产中的重要成分。