Copper-Catalyzed Annulative Coupling of S,S-Disubstituted Enones with Diazo Compounds to Access Highly Functionalized Thiophene Derivatives
作者:Yuan He、Jiang Lou、Ping Wu、Yong-Gui Zhou、Zhengkun Yu
DOI:10.1021/acs.joc.9b02982
日期:2020.1.17
An efficient protocol toward fully substituted thiophenes and thieno[2,3-b]thiophenes has been developed through CuCl2-catalyzed annulative coupling of S,S-disubstituted enones with diazo compounds under mild conditions. Tetrasubstituted thiophenes and thieno[2,3-b]thiophenes were efficiently accessed by variation of the feed ratio of the reactants in good to excellent yields, respectively. The synthetic
通过在温和的条件下通过CuCl2催化的S,S-二取代的烯酮与重氮化合物的环偶联反应,已开发出一种针对完全取代的噻吩和噻吩并[2,3-b]噻吩的有效方案。通过改变反应物的进料比,分别以良好或优异的收率有效地获得了四取代的噻吩和噻吩并[2,3-b]噻吩。合成方法论已经证明了构建各种噻吩衍生物的潜力。