Butenal diethyl acetal was prepared by the reaction of triethyl orthoformate with allylmagnesium chloride obtained by the reaction based on magnesium and allyl chloride.

• 摘要以烯丙基氯与金属镁反应制得烯丙基氯化镁，再与原甲酸三乙醇反应，合成了3-丁烯醛缩二乙醇。