Synthesis of 2,3,9,10,16,17,23,24-Octasubstituted Phthalocyaninatozinc(II) Complexes Mediated by Reductive Agents

Abstract

butanamide (6) was synthesized in 69% yield from the corresponding 4,5-dibromo derivative 5. Treatment of 6 with zinc acetate in the presence of 1,8-diazabicyclo[5.4.0]undec-7-ene gave the octasubstituted zinc(II) phthalocyanine 7, which was reduced with diborane to the give phthalocyanine 8. Quaternization of 8 with iodomethane gave the cationic dye 9.