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Synthetic Communications
An International Journal for Rapid Communication of Synthetic Organic Chemistry
Volume 32, 2002 - Issue 24
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Original Articles

MICROWAVE IRRADIATION SYNTHESIS OF 2-SUBSTITUTED BENZIMIDAZOLES USING PPA AS A CATALYST UNDER SOLVENT-FREE CONDITIONS

Jun Lu Department of Chemistry, Northwest University, Xi’an, 710069, P.R. ChinaCorrespondence[email protected]
,
Bingqin Yang Department of Chemistry, Northwest University, Xi’an, 710069, P.R. China
&
Yinjuan Bai Department of Chemistry, Northwest University, Xi’an, 710069, P.R. China
Pages 3703-3709 | Received 25 Nov 2001, Published online: 23 Aug 2006
 
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ABSTRACT

An efficient microwave irradiation synthesis of 2-substituted benzimidazoles using polyphosphoric acid (PPA) as a catalyst from organic acid and o-phenylenediamine under solvent-free conditions is described. This method is a good option to obtain the title compounds in a simple and an inexpensive way.

ACKNOWLEDGMENTS

We thank the natural science foundation of Shaan’xi Province (2000H03) for financial support.

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