PROCESS FOR THE MANUFACTURE OF FIBRE-REACTIVE PHTHALOCYANINE AZO DYESTUFFS

摘要

Fiber reactive phthalocyanine azo dyes having at least one group of the formula wherein ar and B denote divalent aromatic or araliphatic radicals, R3, R4 and R7 denote hydrogen or optionally substituted alkyl radicals and A denotes a fiber reactive radical, are prepared by diazotizing phthalocyanine amines having at least one group of the formula wherein the amino group is linked to an aromatic C atom of the radical ar, coupling the diazonium compound with a succinic acid derivative of the formula V (V) wherein Z denotes hydrogen or an optionally substituted hydrocarbon radical , treating the hydrazone intermediate with alkali to obtain a phthalocyanine pyrazolone having at least one group of the formula and coupling this product with a diazotized amine of the formula wherein the amino group is linked to an aromatic C atom of the radical B.