Inverse Wittig reaction of oxaphosphetenes formed by the [2+2] cycloaddition of arylphosphine oxides and dimethyl acetylenedicarboxylate (DMAD)

摘要

The intermediate oxaphosphetenes 2 formed by the novelncycloaddition of the Pu0001u0001O group of arylphosphine oxides 1nand the acetylene moiety of DMAD are stabilised by anninverse Wittig reaction to afford the correspondingnstabilised phosphonium ylide 3.