Highly enantioselective synthesis of bisoxindoles with two vicinal quaternary stereocenters via Lewis base mediated addition of oxindoles to isatin-derived ketimines
Reactions of 5-aryloxazolidines with CH-acidic compounds
作者:Anastasia A. Smorodina、Evgeny M. Buev、Vladimir S. Moshkin、Vyacheslav Y. Sosnovskikh
DOI:10.1016/j.tetlet.2019.05.031
日期:2019.6
5-Aryloxazolidines react with active methylene compounds in the presence of catalytic magnesium ethoxide to give methylene-linked 1,3-dicarbonyl compounds, while the similar reaction with 2-oxindoles results in 3-methyl derivatives.
Convenient switching of 7-endo/6-exo radical cyclization
作者:Akio Kamimura、Yohei Taguchi
DOI:10.1016/j.tetlet.2004.01.090
日期:2004.3
7-endo/6-exo Selectivity of radical cyclization to alpha,beta-unsaturated amides was readily controlled by the presence or absence of a temporary substituent, a phenylthio or chlorine group, at the alpha-position of the acceptor. (C) 2004 Elsevier Ltd. All rights reserved.