Process for preparing fiber-reactive phthalocyanine azo dyes

A process of preparing a water-soluble fiber-reactive phthalocyanine azo dye in which the phthalocyanine nucleus carries at least one group having the structure ##STR153## where R is hydrogen or alkyl having up to 6 carbons, and

• ar is a carbocylic divalent aromatic or araliphatic group containing up to two benzene rings and up to 16 carbons, a benzene ring carrying the nitrogen of the heterocycle and R.sup.3 is hydrogen or hydrocarbyl having up to 18 carbons
• the process comprising reacting a water-soluble phthalocyanine dye in which the nucleus has a sulphonyl halide group with an ar-diamine to form a ##STR154## product, diazotizing said product and coupling the diazonium compound with a aryl-succinic acid ester to yield the configuration ##STR155## where R.sup.1 is hydrocarbyl having up to 18 carbons, and
• R.sup.2 is hydrocarbyl having up to 18 carbons, and then cyclizing at sufficiently high pH that configuration to the desired pyrazolone structure ##STR156## followed by coupling the pyrazolone ring with another diazonium compound carrying the fiber-reactive group.