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Synthetic Communications
An International Journal for Rapid Communication of Synthetic Organic Chemistry
Volume 34, 2004 - Issue 24
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Original Articles

Three‐Component One‐Pot Synthesis of 1,4‐Dihydropyrano[2,3‐c]pyrazole Derivatives in Aqueous Media

Daqing Shi Department of Chemistry, Xuzhou Normal University, Xuzhou, 221116, P.R. China; The Key Laboratory of Biotechnology on Medical Plant of Jiangsu Province, Xuzhou, P.R. ChinaCorrespondence[email protected]
,
Jie Mou Department of Chemistry, Xuzhou Normal University, Xuzhou, 221116, P.R. China
,
Qiya Zhuang Department of Chemistry, Xuzhou Normal University, Xuzhou, 221116, P.R. China; The Key Laboratory of Biotechnology on Medical Plant of Jiangsu Province, Xuzhou, P.R. China
,
Lihui Niu Department of Chemistry, Xuzhou Normal University, Xuzhou, 221116, P.R. China
,
Nan Wu Department of Chemistry, Xuzhou Normal University, Xuzhou, 221116, P.R. China
&
Xiangshan Wang Department of Chemistry, Xuzhou Normal University, Xuzhou, 221116, P.R. China; The Key Laboratory of Biotechnology on Medical Plant of Jiangsu Province, Xuzhou, P.R. China
Pages 4557-4563 | Received 18 Jun 2004, Published online: 10 Jan 2011
 
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Abstract

6‐Amino‐5‐cyano‐4‐aryl‐1,4‐dihydropyrano[2,3‐c]pyrazoles were synthesized by three‐component reaction of aromatic aldehydes, malononitrile, and 3‐methyl‐1‐phenyl‐2‐pyrazolin‐5‐one using triethylbenzylammonium chloride (TEBA) as catalyst in aqueous media. The reaction has the advantages of good yield, less pollution, ease of separation, and of being environment friendly.

Acknowledgments

We are grateful to the “Surpassing Project” Foundation of Jiangsu Province for financial support.

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