Three-membered cyclic sulfones undergo substitution on treatment with baseelectrophile mixtures, such as LDA-Me3SiCl and tBu-P4-phosphazene base-PhCHO, to give either substituted episulfones or the corresponding alkenes following loss of SO2. In the absence of Me3SiCl, reaction of episulfones with LDA results in ring-opening to give alkenyl sulfinate intermediates, which can be alkylated to give (E)-alkenyl
                                    三元环砜在用碱亲电混合物(如 
LDA-Me3SiCl 和 tBu-P4-
磷腈碱-PhCHO)处理时发生取代,在失去 SO2 后得到取代的环砜或相应的烯烃。在不存在 Me3SiCl 的情况下,环砜与 
LDA 的反应导致开环生成亚
磺酸烯基中间体,该中间体可以以立体选择性方式烷基化生成 (E)-烯基砜产物。