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E-Journal of Chemistry
Volume 9, Issue 2, Pages 863-868

Highly Efficient Selective Oxygenation of Sulfides to Sulfoxides by Oxalic Acid Dihydrate in the Presence of H2O2

1Department of Chemistry, Rasht Branch, Islamic Azad University, Rasht, Iran
2Department of Biology, Garmsar Branch, Islamic Azad University, Garmsar, Iran
3Department of Chemistry, Science and Research, Amol Branch, Islamic Azad University, Amol, Iran

Received 15 August 2011; Accepted 4 October 2011

Copyright © 2012 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


A highly efficient method for the oxidation of sulfides to sulfoxides using oxalic acid dihydrate in the presence of hydrogen peroxide has been developed. A versatile procedure for the oxidation of sulfides to sulfoxides without any over-oxidation to sulfones has been reported. This procedure cleanly oxidizes sulfides to the corresponding sulfoxides in excellent yields at ambient temperature.