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Synthetic Communications
An International Journal for Rapid Communication of Synthetic Organic Chemistry
Volume 42, 2012 - Issue 23
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Original Articles

Silica–Sulfuric Acid Catalyzed Nitrodeiodination of Iodopyrazoles

P. Ravi Advanced Centre of Research in High Energy Materials (ACRHEM), University of Hyderabad, Hyderabad, IndiaCorrespondence[email protected]
,
Girish M. Gore High Energy Materials Research Laboratory (HEMRL), Pune, India
,
Arun K. Sikder High Energy Materials Research Laboratory (HEMRL), Pune, India
&
Surya P. Tewari Advanced Centre of Research in High Energy Materials (ACRHEM), University of Hyderabad, Hyderabad, India
Pages 3463-3471 | Received 12 Mar 2011, Published online: 02 Aug 2012
 
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Abstract

We report here the synthesis of nitropyrazoles in good to excellent yields from iodopyrazoles over silica–sulfuric acid catalyst for the first time. The present procedure require less acid, offers a simplified workup procedure, and may be applied for the nitration of a wide variety of iodoazoles in drug and pharmaceutical industries.

GRAPHICAL ABSTRACT

ACKNOWLEDGMENT

The Defence Research Development Organisation (DRDO), India, is gratefully acknowledged for financial support through the Advanced Centre of Research in High Energy Materials (ACRHEM).

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