Cycloaddition of phosphanylidene-σ4-phosphoranes ArPPMe3 and quinones to yield 1,3,2-dioxophospholanes

Abstract

The reaction of phosphanylidene-σ⁴-phosphoranes ArPPMe₃ (Ar = 2,6-Mes₂C₆H₃ or 2,4,6-t-Bu₃C₆H₂) with select ortho-quinones yields 1,3,2-dioxophospholanes, one of which shows interesting π-stacking of the aromatic groups in the solid state.