ON THE REACTION OF N-VINYLIMINOPHOSPHORANES. A NOVEL ROUTE TO 1-AZAAZULENE RING SYSTEM UTILIZING AZA-WITTIG REACTION

Article abstract of DOI:10.1246/cl.1986.463

N-(1-Phenyl)vinyliminotriphenylphosphorane, conveniently prepared from α-azidostyrene and triphenylphosphine, readily undergoes an annulation reaction with tropone derivatives to result in the formation of 1-azaazulene ring system.