Novel efficient preparative method for phthalocyanines from phthalimides and phthalic anhydride with HMDS

J Org Chem. 2003 Oct 31;68(22):8736-8. doi: 10.1021/jo030201w.

Abstract

A convenient synthesis of peripherally substituted or unsubstituted phthalocyanines having a variety of metals is described. Phthalocyanines can be obtained by heating phthalimides or phthalic anhydride with metal salts, hexamethyldisilazane, a catalytic amount of p-TsOH, and DMF at 150 degrees C.