A simple and practical method for α-ketoamide synthesis via a decarboxylative strategy of isocyanates with α-oxocarboxylic acids is described. The reaction proceeds at room temperature under mild conditions without an oxidant or an additive, showing good substrate scope and functional compatibility. Moreover, the applicability of this method was further demonstrated by the synthesis of various bioactive
Highly regioselective synthesis of lactams <i>via</i> cascade reaction of α,β-unsaturated ketones, ketoamides, and DBU as a catalyst
作者:Xin Qin、Jinhai Zhang、Zhan-Yong Wang、Yimei Song、Yixiao Yang、Wenhai Zhang、Hongxin Liu
DOI:10.1039/d2ra07117g
日期:——
Herein, the aldol/Michael cascade reaction on the β,γ-positions of α,β-unsaturatedketones with ketoamides to construct bicyclic lactams via DBU catalysis has been developed. The substrates were well-tolerated with high regio- and diastereoselectivities in moderate to good yields (32 examples). The control experiments revealed that the hydrogen of the amide was the key factor.