下面这是搜索维基百科,酰氯化的英文关键词中的一段。应该可以回答你的问题。The reaction with thionyl chloride may be catalyzed by dimethylformamide. In this reaction, the sulfur dioxide (SO2) and hydrogen chloride (HCl) generated are both gases that can leave the reaction vessel, driving the reaction forward. Excess thionyl chloride (b.p. 74.6 °C) is easily evaporated as well.