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Phosphorus, Sulfur, and Silicon and the Related Elements Volume 185, 2010 - Issue 9
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Original Articles

A New Route to 3-Phosphonylpyrazoles

Romuald Bartnik Department of Organic and Applied Chemistry, University of Łódź, Łódź, Poland
&
Dariusz Cal Department of Organic and Applied Chemistry, University of Łódź, Łódź, Poland
Pages 1858-1861 | Received 03 Aug 2009, Accepted 09 Sep 2009, Published online: 25 Aug 2010
 
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Abstract

The regioselective synthesis of 3-diethoxyphosphonopyrazoles has been accomplished through the addition of aryl or alkyl hydrazines to (3-ethoxyacryloyl)phosphonic acid diethyl ester. An example of hydrolysis of the pyrazolephosphonic ester to the corresponding acid is described.

Acknowledgments

This research project was supported by the Faculty of Chemistry, University of Łódź.

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