Palladium-Catalyzed C(sp2)−H Olefination/Annulation Cascades of Aryl Carboxamides Assisted by N,S-Bidentate Auxiliary
作者:Ling Li、Xing-Guo Zhang、Xiao-Hong Zhang
DOI:10.1055/s-0037-1611799
日期:2019.8
auxiliary, with methyl acrylate is described. Various carboxamides with a number of functional groups were compatible with this reaction to afford, regioselectively and in moderate yield, (E)-3-methyleneisoindolin-1-one derivatives bearing an alkyl(aryl)thio group. A palladium(II)-catalyzed olefination/annulation of aryl carboxamides, assisted by an N, S-bidentate auxiliary, with methyl acrylate is described
Copper-Mediated Cyanation of Aryl C-H Bond with Removable Bidenate Auxiliary Using Acetonitrile as the Cyano Source
作者:Zhengwei Yu、Saisai Zhang、Zengming Shen
DOI:10.1002/cjoc.201800334
日期:2018.12
Copper‐mediated cyanation of aryl C—Hbond with removable bidenate auxiliary as a directing group has been developed, in which green and cheap acetonitrile is used as the “CN” source. By switching the reaction conditions, the C—H cyanated products and N‐Ar‐phthalimides can be provided in acceptable yields with high chemoselectivity, respectively. The use of quaternary ammonium salt is essential for