Asymmetric Addition of Indoles to Isatins Catalysed by Bifunctional Modified Cinchona Alkaloid Catalysts
作者:Pankaj Chauhan、Swapandeep Singh Chimni
DOI:10.1002/chem.201000846
日期:——
Simple and selective: An efficient organocatalytic enantioselective method for the synthesis of substituted‐3‐hydroxyoxindole derivatives with a quaternary chiral carbon has been developed. The cinchona alkaloid derived catalyst catalyses the Friedel–Crafts‐type addition of indole derivatives to the isatin derivatives under mild conditions to provide substituted 3‐hydroxyoxindoles in good to excellent
简单和选择性:开发了一种有效的有机催化对映选择性方法,用于合成具有季手性碳的取代-3-羟基羟吲哚衍生物。金鸡纳生物碱衍生的催化剂在温和条件下催化吲哚衍生物的弗里德尔-克来福特型加成反应,从而以高对映选择性(见方案)以良好或优异的收率提供取代的3-羟基羟吲哚(见方案)。