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Synthetic Communications
An International Journal for Rapid Communication of Synthetic Organic Chemistry
Volume 33, 2003 - Issue 6
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Original Articles

Regio-selective Mono Nitration of Phenols with Ferric Nitrate in Room Temperature Ionic Liquid

R. Rajagopal Division of Organic Chemistry: Technology, National Chemical Laboratory, Pune, Maharashtra, India
&
K. V. Srinivasan Division of Organic Chemistry: Technology, National Chemical Laboratory, Pune, Maharashtra, IndiaCorrespondence[email protected]
Pages 961-966 | Received 17 Feb 2002, Published online: 17 Aug 2006
 
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Abstract

The mono nitration of phenols with ferric nitrate has been achieved in high regio-selectivities in 1–3 h at 30–60°C using the ionic liquid 1,3-di-n-butylimidazolium tetraflouroborate [bbim]BF4 as the solvent. In particular, excellent para selectives of the order of 76–86% for unsubstituted, ortho and meta-substituted phenols were observed.

Acknowledgment

RR thanks CSIR, New Delhi for senior research fellowship.

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