Lewis Acid-Catalyzed Intermolecular Annulation: Three-Component Reaction toward Imidazo[1,2-<i>a</i>]pyridine Thiones
作者:Zhengwang Chen、Pei Liang、Fan Xu、Rulin Qiu、Qi Tan、Lipeng Long、Min Ye
DOI:10.1021/acs.joc.9b01188
日期:2019.7.19
A Lewis acid-catalyzed three-component annulation reaction of 2-aminopyridines and ynals with elemental sulfur was established. A series of imidazo[1,2-a]pyridine thiones was obtained in moderate to excellent yields. The merits of this transformation include easily available starting materials, multiple C-heteroatom bond formation in one pot, good functional group tolerance, elemental sulfur as S source
建立了路易斯酸催化的2-氨基吡啶和ynals与元素硫的三组分环化反应。以中等至优异的产率获得了一系列咪唑并[1,2- a ]吡啶硫酮。这种转化的优点包括:容易获得的起始原料,在一个罐中形成多个C-杂原子键,良好的官能团耐受性,元素硫作为S源,操作简便等。