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
Copper-Catalyzed Synthesis of Azaspirocyclohexadienones from α-Azido-<i>N</i>-arylamides under an Oxygen Atmosphere
作者:Shunsuke Chiba、Line Zhang、Jian-Yuan Lee
DOI:10.1021/ja1027327
日期:2010.6.2
copper-catalyzed reaction of alpha-azido-N-arylamides was found to proceed under an oxygen atmosphere to afford azaspirocyclohexadienones. The present transformation is carried out by a sequence of denitrogenative formation of iminyl copper species from alpha-azido-N-arylamides and their imino-cupration with an intramolecular benzene ring on the amido nitrogen followed by consecutive formation of C=O bonds. The
Ru(<scp>ii</scp>)-catalyzed oxidative coupling of sulfoxonium ylides with amines: efficient synthesis of α-ketoamides and indolo[2,1-<i>a</i>]isoquinolines
The first use of sulfoxonium ylides for the synthesis of α-ketoamides is described via a Ru(II)-catalyzed amidation reaction with amines. The same Ru(II)-catalyzed reaction of sulfoxonium ylides with 2-phenylindoles provided indolo[2,1-a]isoquinolines instead of α-ketoamides.
通过Ru( II ) 催化的与胺的酰胺化反应,描述了氧化亚硝叶立德首次用于合成 α-酮酰胺。相同的 Ru( II ) 催化的氧化锍叶立德与 2-苯基吲哚的反应提供了吲哚[2,1- a ] 异喹啉而不是 α-酮酰胺。
Direct Synthesis of α-Ketoamides via Copper-Catalyzed Reductive Amidation of Nitroarenes with α-Oxocarboxylic Acids
作者:Jialing Liu、Jiaxin Yao、Jiahui Du、Lin Yu、Wengui Duan、Yuxuan Xiao、Zhiguo Lei
DOI:10.1021/acs.joc.4c00237
日期:——
Nitroarenes are known for their stability, low toxicity, easy availability, and cost-effectiveness, making them one of the most fundamental chemical feedstocks. The direct utilization of nitroarenes as nitrogen sources in amidation reactions offers significant advantages over using arylamines. Herein, we disclose a streamlined method for constructing α-ketoamides through the direct coupling of nitroarenes