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Abstract | Cited by

The intermediate oxaphosphetenes 2 formed by the novel cycloaddition of the P[double bond, length as m-dash]O group of arylphosphine oxides 1 and the acetylene moiety of DMAD are stabilised by an inverse Wittig reaction to afford the corresponding stabilised phosphonium ylide 3.

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

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