Catalytic intermolecular aldol reactions of transient amide enolates in domino Michael/aldol reactions of nitroalkanes, acrylamides, and aldehydes
作者:Shunya Morita、Tomoyuki Yoshimura、Jun-ichi Matsuo
DOI:10.1039/d0gc04111d
日期:——
Three-component reactions of nitroalkanes, acrylamides, and aldehydes by using a catalytic amount of KOH in DMSO gave β′-hydroxy-γ-nitro amides. Mechanistic studies suggested that the reactions proceeded by domino Michael/aldol reactions. The highly nucleophilic nature of transient amide enolates that were formed by Michael addition of nitronate anions to acrylamides in DMSO enabled the realization
通过在DMSO中使用催化量的KOH,使硝基烷,丙烯酰胺和醛进行三组分反应,得到β'-羟基-γ-硝基酰胺。机理研究表明,反应是通过多米诺·迈克尔/醛醇缩合反应进行的。通过在DMSO中将亚硝酸根阴离子迈克尔加成到丙烯酰胺中而形成的瞬态酰胺烯醇盐具有高度亲核性,这使得在酸性硝基烷存在下,酰胺烯醇盐的催化分子间羟醛反应得以实现。