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Phosphorus, Sulfur, and Silicon and the Related Elements Volume 188, 2013 - Issue 8
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Original Articles

BrØnsted Reusable Acidic Ionic Liquids Catalyzed Biginelli Reaction under Solvent-Free Conditions

Hamid Reza Shaterian Department of Chemistry, Faculty of Sciences, University of Sistan and Baluchestan, Zahedan, Iran
&
Morteza Aghakhanizadeh Department of Chemistry, Faculty of Sciences, University of Sistan and Baluchestan, Zahedan, Iran
Pages 1064-1070 | Received 04 May 2012, Accepted 06 Jul 2012, Published online: 22 Jul 2013
 
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Abstract

2-Pyrrolidonium hydrogensulfate, N-methyl-2-pyrrolidonium hydrogensulfate, and N-methyl-2-pyrrolidonium dihydrogenphosphate as Brønsted reusable acidic ionic liquids (ILs) catalyzed the preparation of 3,4-dihydropyrimidin-2(1H)-one (thione) derivatives from ethyl/methyl acetoacetate, urea/thiourea, and aromatic aldehydes under thermal solvent-free conditions.

GRAPHICAL ABSTRACT

Acknowledgments

The authors are thankful to the University of Sistan and Baluchestan Research Council for the partial support of this research.

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