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 organocatalyticenantioselective 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