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Synthetic Communications
An International Journal for Rapid Communication of Synthetic Organic Chemistry
Volume 41, 2011 - Issue 10
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Original Articles

NbCl5-Catalyzed, Solvent-Free, One-Pot Synthesis of Coumarins

Shu-Tao Gao College of Sciences, Agricultural University of Hebei, Baoding, China
,
Chao Li College of Sciences, Agricultural University of Hebei, Baoding, China
,
Yanen Wang College of Sciences, Agricultural University of Hebei, Baoding, China
,
Jing-Jun Ma College of Sciences, Agricultural University of Hebei, Baoding, China
,
Chun Wang College of Sciences, Agricultural University of Hebei, Baoding, ChinaCorrespondence[email protected]
&
Jing-Wen Zhang College of Sciences, Agricultural University of Hebei, Baoding, China
Pages 1486-1491 | Received 07 Feb 2010, Published online: 30 Mar 2011
 
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Abstract

NbCl5 is found to be an efficient catalyst for the Pechmann condensation reaction of phenols and β-keto ester leading to the formation of coumarin derivatives in excellent yields under solvent-free conditions. The reaction protocol is simple and environmentally friendly.

ACKNOWLEDGMENTS

This work was financially supported by the Natural Science Foundation of Hebei (B2011204051), the Scientific Research Foundation of Education Department of Hebei Province (2010137), and the Natural Science Foundation of the Agricultural University of Hebei (2009-001).

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