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Asymmetric oxidatio...
Asymmetric oxidation of sulfides catalyzed by chiral (salen)Mn(III) complexes with a pyrrolidine backbone
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Gao, Aiping (författare)
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Wang, Mei (författare)
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Shi, Jicheng (författare)
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Wang, Dongping (författare)
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Tian, Wei (författare)
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- Sun, Licheng (författare)
- KTH,Organisk kemi
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(creator_code:org_t)
- 2006
- 2006
- Engelska.
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Ingår i: Applied organometallic chemistry. - : Wiley. - 0268-2605 .- 1099-0739. ; 20:12, s. 830-834
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- 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.
Nyckelord
- asymmetric oxidation
- pyrrolidine
- (salen)Mn complexes
- sulfides
- sulfoxides
- aqueous hydrogen-peroxide
- enantioselective oxidation
- (salen)manganese(iii) complexes
- aryl sulfides
- sulfoxidation
- epoxidation
- oxidant
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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