Di:chloro-quinoxaline carbonamide cpds. prodn. - esp. reactive dyestuff or precursor from amine in aq. medium and molten acid chloride

摘要

Prodn. of 2,3-dichloroquinoxaline 6-carbonamide derivs. of formula (I) (in which Z is an organic gp., R is H or 1-4C alkyl, n is 1-4), involves reacting amines (II) of the formula Z-(NHR)n with n mole 2,3-dichloroquinoxaline-6-carbonyl chloride (III) in aq. medium, (III) being added in molten form to an aq. (II) soln. or suspension. (I) can be a reactive dyestuff or precursor. It is obtd. in high yield and excellent purity.