Acid-catalysed intramolecular cobalt to nitrogen aryl migration and intramolecular reverse reaction in cobalt porphyrins. Synthesis of N-phenylporphyrins

Abstract

On acid treatment phenylcobalt(III)porphyrins yielded N-phenylporphyrin bases, while the reverse reaction was performed upon metallation by cobalt(II) and reduction; double labelling experiments showed that both migrations are intramolecular.