A new and efficient one-pot synthesis of polysubstituted pyrrole derivatives by a three-component reaction between dialkyl acetylenedicarboxylates, aromatic amines, triphenylphosphine, and arylglyoxals is described. The reactions were performed in dichloromethane at room temperature and neutral conditions and afforded high yields of products.
A simple and efficient synthesis of highly substituted pyrroles was achieved in water medium via multi-component strategy, using amine, DMAD/DEAD as well as phenacyl bromide catalyzed by beta-CD. Utilizing this protocol various pyrrole derivatives were synthesized in good to excellent yields. (C) 2012 Y.V.D. Nageswar. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.