A novel and efficient copper-catalyzed tandem oxidative cyclization of arylacrylamides with diaryliodonium salts is reported. This reaction provides a novel approach for the synthesis of oxindoles and various functional groups were well tolerated.
Electrochemical cobalt-catalyzed C–H or N–H oxidation: a facile route to synthesis of substituted oxindoles
作者:Yue Yu、Peifeng Zheng、Yuanheng Wu、Xiaoyi Ye
DOI:10.1039/c8ob02485e
日期:——
Two comparable protocols for the electrochemical cobalt-catalyzed C–H/N–H oxidation have been exploited for the synthesis of substituted oxindoles via radical pathways. The electrochemical cobalt-catalyzed system was demonstrated to be efficient and eco-friendly and avoided the use of stoichiometric oxidants to afford the arylation or alkylation products in good yields at room temperature.
Synthesis of 3,3-Disubstituted Oxindoles by Visible-Light-Mediated Radical Reactions of Aryl Diazonium Salts with N-Arylacrylamides
作者:Weijun Fu、Fengjuan Xu、Yuqin Fu、Mei Zhu、Jiaqi Yu、Chen Xu、Dapeng Zou
DOI:10.1021/jo401894b
日期:2013.12.6
A mild and efficient visible-light-mediated diarylation of N-arylacrylamides with aryl diazonium salts under mild conditions has been developed. This method provides convenient access to a variety of useful 3,3-disubstituted oxindoles by constructing two C-C bonds in one step.