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E-Journal of Chemistry
Volume 7, Issue 4, Pages 1546-1554
http://dx.doi.org/10.1155/2010/829547

A Green Solventless Protocol for the Synthesis of β-Enaminones and β-Enamino Esters Using Silica Sulfuric Acid as a Highly Efficient, Heterogeneous and Reusable Catalyst

Alireza Hasaninejad,1 Abdolkarim Zare,2 Mohammad Rez Mohammadizadeh,1 Mohsen Shekouhy,1 and Ahmad Reza Moosavi-Zare3

1Department of Chemistry, Faculty of Sciences, Persian Gulf University, Bushehr 75169, Iran
2Department of Chemistry, Payame Noor University (PNU), Iran
3Faculty of Chemistry, Bu-Ali Sina University, P. O. Box 4135, Hamedan 6517838683, Iran

Received 31 July 2009; Accepted 25 September 2009

Copyright © 2010 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

Silica sulfuric acid is utilized as a green, highly efficient, heterogeneous and recyclable catalyst for the preparation of β-enaminones and β-enamino esters from amines and β-dicarbonyl compounds under solvent-free conditions at 80 °C. Using this method, the title compounds are produced in high to excellent yields and in short reaction times.