On the Reaction of N-Vinyliminophosphoranes 3. A Novel Route to Phenyl-substituted Pyrroles by the Reaction of N-(1-Phenylvunyl)iminophosphoranes with a-Bromo Ketones

Abstract

N-(l-Phenylvinyl)iminotriphenylphosphorane or N-(1-phenyl-viny1)iminotributylphosphorane reacted with a-bromo ketones to give phenyl-substituted pyrroles via a novel C-C bond formation followed by aza-Wittig reaction.Recently, much attention has been focussed on the synthetic utilities of iminophosphoranes.2For example, a hydrolysis to mines or to ketone^,^ an oxidation to