Journal
JOURNAL OF ORGANOMETALLIC CHEMISTRY
Volume 712, Issue -, Pages 15-19Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jorganchem.2012.03.025
Keywords
Polymer-supported catalyst; Pyrrole; Paal-Knorr condensation reaction; Heterogeneous Lewis acid catalyst
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A new and environmentally benign method for the preparation of N-substituted pyrroles from one-pot condensation reaction of 2,5-hexanedione with amines and diamines in the presence of polystyrene-supported gallium trichloride (PS/GaCl3) as a highly active and reusable heterogeneous Lewis acid catalyst is presented. This new protocol has the advantages of easy availability, stability, reusability and eco-friendly of the catalyst, high to excellent yields, simple experimental and work-up procedure. (C) 2012 Elsevier B.V. All rights reserved.
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