A radical cyclization of N‐methyl‐N‐arylpropiolamide to isatins via an oxidative cleavage of a carbon‐carbon triple bond has been developed. In the presence of oxone and NaNO2, a variety of N‐methyl‐N‐arylpropiolamides were smoothly transformed into isatins. A nitration reaction proceeded along with the oxidative cyclization; both nitrated and non‐nitrated isatins were obtained in a one‐pot reaction
A CuAAC/Ullmann C–C Coupling Tandem Reaction: Copper-Catalyzed Reactions of Organic Azides with <i>N</i>-(2-Iodoaryl)propiolamides or 2-Iodo-<i>N</i>-(prop-2-ynyl)benzenamines
作者:Qian Cai、Jiajie Yan、Ke Ding
DOI:10.1021/ol301307x
日期:2012.7.6
A novel copper-catalyzed tandem reaction was developed by utilizing two famous copper-catalyzed reactions, CuAAC and Ullmann coupling. The trapping of the C-Cu intermediate produced in CuAAC led to further formation of an aryl C-C bond through intramolecular Ullmann C-C coupling.