Unsymmetrical phthalocyanines with a single macrocyclic substituent

Unsymmetrical phthalocanines ( 5–7 ) with a single macrocyclic substituent are synthesized by the reaction of the boron complex of phthalonitrile ( 1 ) with the iminoisoindoline derivatives 2–4 of macrocyclic compounds, i.e. 15‐crown‐5, monoaza‐15‐crown‐5, and tetraazacyclotetradecane. The monomacrocycle‐substituted phthalocyanines are less soluble than the tetra‐substituted one.