A Novel Route to Phenyl-substituted Pyridines by the Reaction of N-(1-Phenylvinyl)iminophosphoranes with α,β-Unsaturated Ketones

The N-(1-phenylvinyl)iminotriphenylphosphorane or N-(1-phenylvinyl)iminotributylphosphorane reacted with α,β-unsaturated ketones to undergo a novel C–C bond formation followed by aza-Wittig reaction to result in the formation of phenyl-substituted pyridines.