Journal
CATALYSIS COMMUNICATIONS
Volume 8, Issue 11, Pages 1724-1728Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.catcom.2007.01.034
Keywords
4H-Benzo[b]pyrans; 4H-Chromene; tetra-methyl ammonium hydroxide; aqueous media; Tandem Knoevenagel-cyclocondensation reaction
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Tetra-methyl ammonium hydroxide has been used as a mild, efficient, neutral and cheap catalyst for the synthesis of various 4H-benzo[b]pyran derivatives via a one-pot three-component condensation in aqueous media. This method offers the advantages of proceeding, neutral and mild conditions, giving high to excellent yields of the products and simple work-up. (c) 2007 Elsevier B.V. All rights reserved.
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