The asymmetric Michael addition of dioxindoles to β-substituted nitroalkenes is reported. The bifunctional primary amine-thiourea A, by means of a non-covalent-based mode of catalysis, secures direct access to 3-substituted 3-hydroxyoxindole derivatives with high stereocontrol.
报告了二氧吲哚与 β-取代的硝基烯的不对称迈克尔加成反应。双功能伯胺-硫脲 A 通过非共价催化模式,可直接获得具有高度立体控制性的 3-取代 3-羟基吲哚衍生物。