Access to (<i>Z</i>)-1,2-Endiamides and 1,1-Endiamides via a Base-Promoted Tandem Reaction
作者:Zhenming Zhang、Bei Fu、Hui Wang、Han Chen、Yongliang Tu、Junfeng Zhao
DOI:10.1021/acs.joc.9b03305
日期:2020.4.17
An efficient base-promoted tandem reaction between vinyl 1,1-dichlorides and secondary sulfonamides with ynamide as the key intermediate is described. This method provides a facile approach to (Z)-1,2-endiamide and aryl 1,1-endiamide derivatives via the β-hydroamidation of terminal ynamides and the α-hydroamidation of internal ynamides, respectively. This reaction proceeded through double elimination
描述了乙烯基1,1-二氯化物与仲磺酰胺之间以乙酰胺为主要中间体的有效碱促进的串联反应。该方法分别通过末端乙酰胺的β-氢酰胺化和内部乙酰胺的α-氢酰胺化提供了一种简便的方法来合成(Z)-1,2-二酰胺和芳基1,1-二酰胺衍生物。该反应通过两次消除氯乙烯和向亲炔两次添加亲核试剂而进行。另外,它具有容易获得的起始原料,温和的反应条件,广泛的底物范围,广泛的官能团耐受性和操作便利性。