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Asymmetric oxidation of sulfides catalyzed by chiral (salen)Mn(III) complexes with a pyrrolidine backbone
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2006 (English)In: Applied organometallic chemistry, ISSN 0268-2605, E-ISSN 1099-0739, Vol. 20, no 12, 830-834 p.Article in journal (Refereed) Published
Abstract [en]

Catalytic properties of a series of chiral (pyrrolidine salen)Mn(III) complexes for asymmetric oxidation of aryl methyl sulfides were evaluated. Moderate activity, good chemical selectivity and low enantioselectivity were attained with iodosylbenzene as a terminal oxidant. Enantioselectivity of sulfide oxidation was affected slightly by polar solvent and the sulfoxidation carried out in THF for thioanisole and in CH3CO2Et for electron-deficient sulfides gave better enatioselctivities. The addition of the donor ligand PPNO (4-phenylpyridine N-oxide) or MNO (trimethylamine N-oxide) only has a minor positive effect on the enantioselectivity. Also explored was the steric effect of the N-aza-substituent in the backbone of (pyrrolidine salen)Mn(III) complexes on the enantioselectivity of sulfide oxidation. The sulfides' access pathway is discussed based on the catalytic results.

Place, publisher, year, edition, pages
2006. Vol. 20, no 12, 830-834 p.
Keyword [en]
asymmetric oxidation, pyrrolidine, (salen)Mn complexes, sulfides, sulfoxides, aqueous hydrogen-peroxide, enantioselective oxidation, (salen)manganese(iii) complexes, aryl sulfides, sulfoxidation, epoxidation, oxidant
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URN: urn:nbn:se:kth:diva-16152DOI: 10.1002/aoc.1121ISI: 000242324600003Scopus ID: 2-s2.0-33751358618OAI: oai:DiVA.org:kth-16152DiVA: diva2:334194
Note
QC 20100525Available from: 2010-08-05 Created: 2010-08-05Bibliographically approved

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Sun, Licheng

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