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Efficient and Selective Sulfoxidation by Hydrogen Peroxide Using Recyclable Flavin-Catalyst-[BMIm]PF6 System
Stockholm University, Faculty of Science, Department of Organic Chemistry.
Manuscript (Other academic)
Identifiers
URN: urn:nbn:se:su:diva-23984OAI: oai:DiVA.org:su-23984DiVA: diva2:196215
Note
Part of urn:nbn:se:su:diva-623Available from: 2005-09-01 Created: 2005-09-01 Last updated: 2010-01-13Bibliographically approved
In thesis
1. Flavins as Biomimetic Catalysts for Sulfoxidation by H2O2: Catalyst Immobilization in Ionic Liquid for H2O2 Oxidations
Open this publication in new window or tab >>Flavins as Biomimetic Catalysts for Sulfoxidation by H2O2: Catalyst Immobilization in Ionic Liquid for H2O2 Oxidations
2005 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

This thesis deals with the development of catalytic oxidation reactions utilizing hydrogen peroxide as terminal oxidant. The main focus has been to find flavin catalysts that are easy to handle and stable to store but still able to perform the desired reaction. A variety of dihydroflavins were prepared and the electrochemical oxidation potentials were measured and compared with their catalytic activity.

A flavin catalyst was applied in the sulfoxidation of allylic and vinylic sulfides by H2O2. This transformation was highly chemoselective and the sulfoxides were obtained without formation of other oxidation products. The scope of the reaction was demonstrated by applying the method on substrates with a wide range of functional groups such as a tertiary amine. Another flavin catalyst was immobilized in the ionic liquid [BMIm]PF6 and used for sulfoxidations by H2O2. The chemoselectivity was maintained in this system and the catalyst-ionic liquid system could be recycled several times.

Finally two bimetallic catalyst systems for the dihydroxylation of alkenes by H2O2 were immobilized in the ionic liquid. These systems employed either vanadium acetylacetonate VO(acac)2 or methyl trioxorhenium (MTO) as co-catalysts together with the substrate-selective osmium catalyst. Good to excellent yields of the diols were obtained.

Place, publisher, year, edition, pages
Stockholm: Institutionen för organisk kemi, 2005. 63 p.
Keyword
biomimetic, oxidation, catalysis, ionic liquid, hydrogen peroxide
National Category
Organic Chemistry
Identifiers
urn:nbn:se:su:diva-623 (URN)91-7155-114-X (ISBN)
Public defence
2005-09-23, Magnélisalen, Kemiska övningslaboratoriet, Svante Arrhenius väg 12 A, Stockholm, 14:00
Opponent
Supervisors
Available from: 2005-09-01 Created: 2005-09-01Bibliographically approved

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