Synthesis of 2,7,12,17-tetra-arylporphyrins, new sterically hindered porphyrins

Abstract

Sterically hindered porphyrins with four bulky aryl groups in the β-positions are prepared by the reduction of ethyl 3-aryl-4-alkylpyrrole-2-carboxylate with LiAIH4 followed by treatment with an acid and an oxidizing agent.