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Abstract
Potassium permanganate absorbed on copper(II) sulfate pentahydrate has been found to be an efficient, inexpensive, and green oxidation agent for the synthesis of “symmetrical” thiosulfonate S-esters by oxidation of the corresponding symmetrical disulfides. The oxidation reactions were carried out under solvent-free reaction conditions within 15 min under the influence of microwave irradiation, as well as (for comparison) supported by conventional heating, to afford yields of the thiosulfonate S-esters in the range of 60–83%. The oxidation reaction appears to proceed (at least partly) via an intermediate symmetrical vic-disulfoxide.
GRAPHICAL ABSTRACT
Funding
The authors are grateful to the Vietnamese National Foundation for Science and Technology Development (NAFOSTED) for financial support under grant number [104.01–2011.40]. The authors are also indebted to the Danish International Development Agency (DANIDA) for financial support via the Enhancement of Research Capacity (ENRECA) programme.
Supplemental data
Supplemental data for this article can be accessed at doi:10.1080/17415993.2015.1025404