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Synthetic Communications
An International Journal for Rapid Communication of Synthetic Organic Chemistry
Volume 42, 2012 - Issue 9
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Original Articles

Microwave-Promoted Synthesis of 3,4-Dihydropyrimidin-2(1H)-(thio)ones Using IL-ONO as Recyclable Base Catalyst Under Solvent-Free Conditions

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Pages 1268-1277 | Received 27 Aug 2010, Published online: 11 Jan 2012
 

Abstract

A mild, efficient, and solvent-free microwave (MW)–promoted Biginelli reaction for the synthesis of 3,4-dihydropyrimidin-2(1H)-(thio)ones in nitrite ionic liquid (IL-ONO) is described. This ionic liquid is a weak Lewis base catalyst, which can be easily recovered and reused in several runs. The satisfactory results were obtained with good yields and short reaction time, using a simple experimental procedure.

GRAPHICAL ABSTRACT

ACKNOWLEDGMENTS

The partial financial assistance from the research vice chancellor of Islamic Azad University of Mianeh and Azerbaijan University of Tarbiat Moallem is gratefully acknowledged.

Notes

a Isolated yields of products.

a Isolated yields of product.

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