Journal
JOURNAL OF CATALYSIS
Volume 262, Issue 1, Pages 111-118Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcat.2008.12.007
Keywords
Sulfides; Ti-binol; Mesoporous silica; Supported ionic liquid; Non-linear effect; Kinetic resolution; Sulfoxides
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Funding
- CSIR, New Delhi (India) for the research fellowship
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Chiral Ti-binol complex was immobilized onto ionic liquid modified SBA-15 and characterized by different physicochemical techniques. The catalyst was found to be highly enantioselective in the heterogeneous asymmetric oxidation of prochiral sulfides to sulfoxides and subsequent oxidative kinetic resolution of the sulfoxides using aqueous tert-butylhydroperoxide as the oxidant. A positive non-linear effect was observed in the oxidation-kinetic resolution of thioanisole using this supported catalyst. The supported catalyst was reused in multiple catalytic runs without any loss of enantioselectivity. (C) 2008 Elsevier Inc. All rights reserved.
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