α－芳甲酰基烯酮二硫缩醛的新合成方法

A New Method for the Synthesis of α-Aroyl Ketene Dithioacetals

以碳酸钾为碱，芳甲酰丙酮（１）与二硫化碳、卤代烃反应得到２－乙酰基－２－芳甲酰基烯酮硫代缩醛（２），２在乙硫醇钾作用下脱乙酰基生成标题化合物（３）。１→３的转化具有反应条件温和、产物产率高及对３中各种缩醛基均可通用等特点。

A facile approach to the synthesis of the title compounds 3 are reported in this paper.Assisted by potassium ethylthioate,2-acetyl-2-aroyl ketene dithioacetals 2(prepared easily from aroylacetones 1)were deacetylated to afford the title compounds 3.The reaction conditions from 1 to 3 were very mild and the yields were high.