The utility of thiourea dioxide as an efficient organocatalyst for the library synthesis of novel heterocyclic compoundsvia one-pot multicomponent coupling reactions is disclosed. Thiourea dioxide is an inexpensive and readily accessible catalyst, resulting in better product yields as compared to the corresponding thiourea as catalyst. Thiourea dioxide is found to be insoluble in various organic solvents and therefore at the end of the reaction products can be separated by extraction with diethyl ether and the recovered catalyst can be used several times with consistent catalytic activity.
介绍了二氧化
硫脲作为高效有机催化剂在一锅多组分偶联反应中合成新型
杂环化合物的应用。与相应的
硫脲催化剂相比,二氧化
硫脲作为一种廉价且易于获得的催化剂,能带来更好的产物收率。二氧化
硫脲在多种有机溶剂中难以溶解,因此反应结束后,产物可通过
乙醚萃取分离,且回收的催化剂能多次重复使用,保持稳定的催化活性。