Synthesis of Unsymmetrically Benzo-Annulated Phthalocyanines

Abstract

A general synthesis of unsymmetrically benzo-annulated phthalocyanines is described. The desired functional group is introduced in the macrocycle by Diels-Alder reaction always starting from the phthalocyanine precursor 1. Complete aromatization is accomplished by reacting the Diels-Alder product with a dehydrating agent like p-toluenesulfonic acid or DBU.

Key words

nickel(II) phthalocyanines - synthesis - Diels-Alder reaction - dehydrations - unsymmetrical substitution pattern

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