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E-Journal of Chemistry
Volume 8, Issue 2, Pages 529-534
http://dx.doi.org/10.1155/2011/684937

An Efficient, Simple and Green Zn(Phen)2Cl2 Complex Catalyzed Synthesis of 4-H-Benzo[b]pyrans in Water at Ambient Temperature

E. Mosaddegh,1 A. Hassankhani,2 and G. Mansouri3

1Department of Material ScienceInternational Center for Science, High Technology &, Environmental Sciences, P O Box 76315-117, Kerman, Iran
2Department of Materials Science International Center for Science, High Technology &, Environmental Sciences, P O Box 76315-117, Kerman, Iran
3Young Researcher Club, Islamic Azad University of Kermanshah P O Box 6718997551, Kermanshah, Iran

Received 16 June 2010; Accepted 1 September 2010

Copyright © 2011 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

An efficient method for the synthesis of 4-H-benzo[b]pyrans has been developed by the use of Zn(Phen)2Cl2(2 mol%) as an ecofriendly catalyst. The mixture of an appropriate aldehyde, malononitrile and dimedone in the presence of the Zn(Phen)2Cl2 as an inorganic catalyst in water at room temperature resulted excellent yields of the corresponding products in 5 min. Very short experimental time of the reaction, excellent yields, use of water as a green solvent, simple work-up and uses no extra catalyst and purification are the advantages of this method.