Remote stereocontrolled asymmetric 1,6-addition/1,4-addition cascade reactions between cyclic dienones and 2-indolinethiones

Abstract

Highly enantioselective 1,6-addition/1,4-addition cascade reactions between cyclic dienones and 2-indolnethiones have been realized by employing a cinchona-based primary amine catalyst. This method displays a broad substrate scope and provides a simple and highly effective way to achieve the chiral spiro[thiopyranoindole-cyclohexanone] scaffold.