Phenyl azophenyl dyestuff

Abstract

Dyestuff of the formula: ##SPC1## In which m is equal to 0 or 1, n is equal to 1, 2 or 3, A represents the residue of an aromatic or heterocyclic diazotizable amine devoid of solubilizing acid groups, the benzene ring B is unsubstituted or substituted by one or two atoms of chlorine or bromine or methyl, ethyl, methoxy, ethoxy or acylamino groups, X represents a hydrogen or chlorine atom or a methyl, ethyl, methoxy, ethoxy or acylamino group, Y represents a hydrogen atom or a methyl, ethyl, methoxy or ethoxy group, R represents a hydrogen atom, a mono substituted or unsubstituted alkyl group or a group of the formula: ##SPC2## And Z represents a 2-cyanovinyl, 2-cyanoethyl or 2-chloro-2-cyanoethyl residue; process for the preparation of dyestuffs of the above formula; process for coloring hydrophobic materials with such dyestuffs; hydrophobic materials colored with such dyestuffs and esters of the formula: ##SPC3## Wherein m, n, A, B, R, X, Y and Z have the meanings given above.

Dependencies are inferred from the claim text.