An Efficient Synthesis of Polyfunctionalized Indole Derivatives via Three-component Domino Reaction Catalyzed by L-Proline

摘要

A facile and efficient one-pot procedure for the preparation of indeno[1,2-b]indole derivatives via three-component domino reaction of ninhydrin, enaminones, and malononitrile catalyzed by L-proline is described. In this reaction, two rings and four bonds were formed by one-pot.