ON THE REACTION OF N-VINYLIMINOPHOSPHORANES. SYNTHESIS AND REACTION OF 1,2-λ5-AZAPHOSPHORINE RING SYSTEM

Article abstract of DOI:10.1246/cl.1985.1459

The reaction of N-vinyliminotrimethoxyphosphorane reacts with electron deficient acetylenes results in the formation of formal <4+2> cycloadducts, 1,2-λ⁵-azaphosphorines 4a-c.However, N-vinyliminotriphenylphosphorane reacts with dimethyl acetylenedicarboxylate (DMAD) in a formal <2+2> manner.The product 4a or 4b also reacts with DMAD to give λ⁵-phosphorine derivatives.