A General, Effcient and Green Procedure for Synthesis of Dihydropyrimidine-5-carboxamides in Low Melting Betaine Hydrochloride/Urea Mixture
作者:Peng Liu、Jianwu Hao、Zhanhui Zhang
DOI:10.1002/cjoc.201500862
日期:2016.6
A simple, facile and convenient strategy has been developed for the synthesis of dihydropyrimidine‐5‐carboxamides in low melting mixture of betaine hydrochloride/urea. In this procedure, the low melting mixture of betaine hydrochloride/urea plays a triple role: as a catalyst, solvent and reactant. The present green protocol has advantages such as high yield of products, short reaction times, operational
已经开发了一种简单,简便,方便的策略,用于在甜菜碱盐酸盐/尿素的低熔点混合物中合成二氢嘧啶-5-羧酰胺。在此过程中,甜菜碱盐酸盐/尿素的低熔点混合物起着三重作用:作为催化剂,溶剂和反应物。当前的绿色方案具有以下优点:产品产量高,反应时间短,操作简便,无需色谱分离,生态友好以及适用于大规模合成。