Rapid addition of a tertiary amine to tin(IV) chloride–selenoacetal mixtures leads to the corresponding vinyl selenides in good yield, whereas slow addition of the amine base gives aldol condensation products.
                                    将叔胺快速添加到
氯化锡(IV)-
硒缩醛混合物中可得到相应的
乙烯基硒化物,收率很高,而胺碱的缓慢添加会产生醛醇缩合产物。