Journal
TETRAHEDRON LETTERS
Volume 54, Issue 29, Pages 3892-3895Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.tetlet.2013.05.061
Keywords
Pyrano[3,2-c]coumarins; Tandem reaction; Copper triflate; Regioselectivity; Solvent-free
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Funding
- DST, Govt. of India [SR/S5/GC-05/2010]
- CSIR
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Efficient synthesis of pyrano[3,2-c]coumarins has been achieved via copper(II) triflate catalyzed tandem reaction of 4-hydroxycoumarin with alpha,beta-unsaturated carbonyl compounds in high yields. The catalytic reaction proceeded very smoothly under solvent-free conditions and showed high regioselectivity. The synthetic potential of this methodology was explored to 4-hydroxy-6-methyl-2-pyrone successfully. (C) 2013 Elsevier Ltd. All rights reserved.
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