Tertiary amide-based Knoevenagel-type reactions: a direct, general, and chemoselective approach to enaminones
作者:Pei-Qiang Huang、Wei Ou、Kai-Jiong Xiao、Ai-E Wang
DOI:10.1039/c4cc03826f
日期:——
We report one-pot and chemoselective Knoevenagel-type reactions using highly stable amides and lactams as the electrophilic substrates. The method is based on the in situ activation of amide carbonyl with triflic anhydride and a subsequent reaction with carbanions generated in situ from carbonyl compounds. The amide-based method is an alternative to the versatile thioamide-based Eschenmoser sulfide contraction.
我们报告了以高度稳定的酰胺和内酰胺为亲电底物的一锅化学选择性克诺文纳格尔型反应。该方法基于酰胺羰基与三酸酐的原位活化,以及随后与羰基化合物原位生成的碳离子反应。这种基于酰胺的方法是基于硫代酰胺的埃申莫瑟硫化收缩法的替代方法。