An expedient synthesis of poly-substituted pyrroles from γ-ketonitriles via indium-mediated Barbier reaction strategy

We developed an efficient synthetic strategy of poly-substituted pyrroles via an indium-mediated Barbier type allylation from gamma-ketonitriles. Initial attack of allylindium species occurred at the nitrile group selectively to form the enamine intermediate, which reacted with the ketone group intramolecularly to furnish the pyrroles. (C) 2009 Elsevier Ltd. All rights reserved.