Transylidations of Stable Sulfonium Ylids

Abstract
In the presence of a dialkoxy disulfide, sulfonium bis(methoxycarbonyl)methylids underwent transylidation with a dialkyl sulfide or pyridine at 35 °C. Thiocyanogen and benzoyl disulfide showed a similar catalytic effect. The kinetics of this reaction were investigated, and its mechanism was discussed.