Preparation of 1,2-substituted benzimidazoles <i>via</i> a copper-catalyzed three component coupling reaction
作者:Weiguang Yang、Yu Zhao、Zitong Zhou、Li Li、Liao Cui、Hui Luo
DOI:10.1039/d1ra00650a
日期:——
N-substituted o-phenylenediamines, sulfonyl azides and terminal alkynes. Particularly, the intermediate N-sulfonylketenimine occurred with two nucleophilic addition and the sulfonyl group was eliminated via cyclization. In a way, sulfonyl azides and copper catalysts activated the terminal alkynes to synthesize benzimidazoles.