高纯的Z-和E-二氯烯酮的获得方法

The Method for Proparation of High Pure Z-and E-Dichlorovinylketones

通过Ｋｎｏｖｅｎａｇｅｌ反应制备了混合Ｚ－和Ｅ－二氯烯酮、（Ｚ＋Ｅ）－１－（２，４－二氯苯基）－４，４－二甲基－２－（１，２，４－三唑－１－基）戊－１－烯－３－酮，该混合烯酮用乙醇处理得到纯度为９９９７％的Ｚ－烯酮，分离Ｚ－烯酮后的混合烯酮经异构化反应得到纯度为９９７３％的Ｅ－烯酮。

A mixture of dichlorovinylketone,(Z+E)-1-(2,4-dichlorophenyl)-4,4-dimethyl-2-(1,2,4-triazol-1-yl)pent-1-en-3-one,was prepared by Knovenagel-Reaction.The mixture was treated with alcohol to obtain the Z-dichlorovinylketone with purity of 99.97%,and the residue was isomerizated to give the E-dichlorovinylketone with purity of 99.73%.