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Synthetic Communications
An International Journal for Rapid Communication of Synthetic Organic Chemistry
Volume 41, 2011 - Issue 12
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Original Articles

Ionic Liquid Oxidant for Efficient and Selective Oxidation of Benzylic Alcohols

, , &
Pages 1725-1732 | Received 26 Jan 2010, Published online: 29 Apr 2011
 

Abstract

Hexamethylenebis (N-methylimidazolium) dichlorochromate was easily prepared by addition of N-methylimidazole to 1,6-dibromohexane to form the corresponding dibromide salt and subsequent treatment with CrO3 in 6 N HCl solution. It is a low-melting orange salt that selectively oxidized benzylic alcohols.

ACKNOWLEDGMENT

Financial support from the research council of the University of Mazandaran is gratefully acknowledged.

Notes

a Yields refer to isolated products.

b All products were identified by comparing IR, NMR, and TLC with those of authentic samples reported in literature.

a Hexamethylenebis(N-methylimidazolium) dichlorochromate.

b Pyridinium chlorochromate.

c Ethylenebis(N-methylimidazolium) chlorochromate.

d N-Methyl piperidinium chlorochromate.

e 1-(Benzoylamino)-3-methylimidazolium chlorochromate.

f n-Buthylammonium chlorochromate.

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