Oxidation of sulfides to sulfoxides mediated by ionic liquids

Bo Zhang; Ming Dong Zhou; Mirza Cokoja; János Mink; Shu Liang Zang; Fritz E. Kühn

doi:10.1039/c2ra21323k

Oxidation of sulfides to sulfoxides mediated by ionic liquids

Bo Zhang, Ming Dong Zhou, Mirza Cokoja, János Mink, Shu Liang Zang, Fritz E. Kühn

Associate Professorship of Molecular Catalysis

Research output: Contribution to journal › Article › peer-review

32 Scopus citations

Abstract

A highly selective and efficient oxidation of sulfides to sulfoxides is presented. The reactions were carried out at room temperature in the absence of a catalyst in the ionic liquid [Bmim][BF₄] (Bmim = 1-butyl-3-methylimidazolium) using aqueous H₂O₂ (35%) as oxidant. The products were obtained in high yields. Compared to the analogous reactions in organic solvents, this system can be recycled without significant loss of activity and selectivity. Additionally, the reaction mechanism was examined by IR, Raman and NMR spectroscopy. Based on these examinations, it appears that the crucial step during the oxidation procedure is the formation of a hydrogen bond between the ionic liquid and the oxidant.

Original language	English
Pages (from-to)	8416-8420
Number of pages	5
Journal	RSC Advances
Volume	2
Issue number	22
DOIs	https://doi.org/10.1039/c2ra21323k
State	Published - 28 Sep 2012

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abstract = "A highly selective and efficient oxidation of sulfides to sulfoxides is presented. The reactions were carried out at room temperature in the absence of a catalyst in the ionic liquid [Bmim][BF4] (Bmim = 1-butyl-3-methylimidazolium) using aqueous H2O2 (35%) as oxidant. The products were obtained in high yields. Compared to the analogous reactions in organic solvents, this system can be recycled without significant loss of activity and selectivity. Additionally, the reaction mechanism was examined by IR, Raman and NMR spectroscopy. Based on these examinations, it appears that the crucial step during the oxidation procedure is the formation of a hydrogen bond between the ionic liquid and the oxidant.",

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T1 - Oxidation of sulfides to sulfoxides mediated by ionic liquids

AU - Zhang, Bo

AU - Zhou, Ming Dong

AU - Cokoja, Mirza

AU - Mink, János

AU - Zang, Shu Liang

AU - Kühn, Fritz E.

PY - 2012/9/28

Y1 - 2012/9/28

N2 - A highly selective and efficient oxidation of sulfides to sulfoxides is presented. The reactions were carried out at room temperature in the absence of a catalyst in the ionic liquid [Bmim][BF4] (Bmim = 1-butyl-3-methylimidazolium) using aqueous H2O2 (35%) as oxidant. The products were obtained in high yields. Compared to the analogous reactions in organic solvents, this system can be recycled without significant loss of activity and selectivity. Additionally, the reaction mechanism was examined by IR, Raman and NMR spectroscopy. Based on these examinations, it appears that the crucial step during the oxidation procedure is the formation of a hydrogen bond between the ionic liquid and the oxidant.

AB - A highly selective and efficient oxidation of sulfides to sulfoxides is presented. The reactions were carried out at room temperature in the absence of a catalyst in the ionic liquid [Bmim][BF4] (Bmim = 1-butyl-3-methylimidazolium) using aqueous H2O2 (35%) as oxidant. The products were obtained in high yields. Compared to the analogous reactions in organic solvents, this system can be recycled without significant loss of activity and selectivity. Additionally, the reaction mechanism was examined by IR, Raman and NMR spectroscopy. Based on these examinations, it appears that the crucial step during the oxidation procedure is the formation of a hydrogen bond between the ionic liquid and the oxidant.

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Oxidation of sulfides to sulfoxides mediated by ionic liquids

Abstract

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