A general metal free approach to α-ketoamides via oxidative amidation–diketonization of terminal alkynes
作者:Ramesh Deshidi、Manjeet Kumar、Shekaraiah Devari、Bhahwal Ali Shah
DOI:10.1039/c4cc03783a
日期:——
A metal free catalytic system employing TMSOTf/I2/DMSO for the oxidative amidation–diketonization of terminal alkynes, in order to produce a wide variety of α-ketoamides, has been developed.
Iodine-Promoted Oxidative Amidation of Terminal Alkenes - Synthesis of α-Ketoamides, Benzothiazoles, and Quinazolines
作者:Ramesh Deshidi、Shekaraiah Devari、Bhahwal Ali Shah
DOI:10.1002/ejoc.201403547
日期:2015.3
A novel metal-free strategy for oxidative amidation of terminal alkenes by using I2/DMSO for the synthesis of α-ketoamides has been developed. Intriguingly, the use of tert-butylhydroperoxide (TBHP) as co-oxidant can facilitate the synthesis of α-ketoamides at room temperature without any solvent, thereby making it a green protocol. The reaction with primary amines can be easily achieved by using SeO2
Development of C–N coupling processes is fundamentally important and challenging for the synthesis of biologically active molecules and drugs. Herein, we report a highly atom efficient green process for the synthesis of α-ketoamides via visible-light induced copper(I) chloride catalysed direct oxidative Csp–N coupling reactions using commercially available alkynes and anilines at room temperature without
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.