Dioxindole in Asymmetric Catalytic Synthesis: Routes to Enantioenriched 3-Substituted 3-Hydroxyoxindoles and the Preparation of Maremycin A
作者:Giulia Bergonzini、Paolo Melchiorre
DOI:10.1002/anie.201107443
日期:2012.1.23
nucleophilicity of dioxindole under different reaction conditions is key to a direct and easy access to valuable spiro oxindole γ butyrolactones and 3‐substituted 3‐hydroxyoxindole derivatives in excellent yields and enantioselectivities (see scheme). The preparation of maremycin A serves as an example for the potential usefulness of this previously unexplored reactivity in natural product synthesis.
驯化反应性:了解二恶吲哚在不同反应条件下的亲核性是直接和轻松获得有价值的螺恶二恶唑γ丁内酯和3-取代的3-羟基恶吲哚衍生物的关键,其产率和对映选择性都很高(参见方案)。马雷霉素A的制备可作为这种先前未开发的反应物在天然产物合成中的潜在用途的一个实例。