Journal
JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY
Volume 21, Issue 1, Pages 33-36Publisher
SOC BRASILEIRA QUIMICA
DOI: 10.1590/S0103-50532010000100006
Keywords
sulfides; sulfoxide; ammonium hydrogen sulfate (NH(4)HSO(4)); ammonium nitrate (NH(4)NO(3)); ammonium bromide (NH(4)Br); homoselectivity
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Funding
- Center of Excellence of Development of Chemical Methods (CEDCM) of Bu-Ali Sina University, Hamadan, Iran
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A general and metal-free catalytic oxidation of aliphatic and aromatic sulfides to their corresponding sulfoxides via combination of ammonium nitrate (NH(4)NO(3)), supported ammonium hydrogen sulfate on silica gel (NH(4)HSO(4)-SiO(2)) and a catalytic amount of ammonium bromide (NH(4)Br) in the presence of wet SiO(2) (50%, w/w) has been investigated. The reactions were carried out heterogeneously and selectively in short reaction times in CH(2)Cl(2) at room temperature. This protocol is mild and efficient compared to other reported methods.
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