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Substituent Effects...
Substituent Effects in Chain-Breaking Aryltellurophenol Antioxidants
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- Poon, Jia-fei (författare)
- Uppsala universitet,Organisk kemi,Lars Engman
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- Yan, Jiajie (författare)
- Uppsala universitet,Organisk kemi,Lars Engman
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- Jorner, Kjell (författare)
- Uppsala universitet,Oorganisk kemi,Henrik Ottosson
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- Ottosson, Henrik (författare)
- Uppsala universitet,Oorganisk kemi,Henrik Ottosson
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- Donau, Carsten (författare)
- Uppsala universitet,Organisk kemi,Lars Engman
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- Singh, Vijay P. (författare)
- Department of Chemistry & Centre of Advanced Studies in Chemistry, Panjab University, Chandigarh, India,Lars Engman
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- Gates, Paul J. (författare)
- School of Chemistry, University of Bristol, United Kingdom
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- Engman, Lars, 1952- (författare)
- Uppsala universitet,Organisk kemi
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(creator_code:org_t)
- 2018-02-08
- 2018
- Engelska.
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Ingår i: Chemistry - A European Journal. - : Wiley. - 0947-6539 .- 1521-3765. ; 24:14, s. 3520-3527
- Relaterad länk:
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https://research-inf...
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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
- 2-Aryltellurophenols substituted in the aryltelluro or phenolic part of the molecule were prepared by lithiation of the corresponding O-THP-protected 2-bromophenol, followed by reaction with a suitable diaryl ditelluride and deprotection. In a two-phase system containing N-acetylcysteine as a co-antioxidant in the aqueous phase, all compounds quenched lipid peroxyl radicals more efficiently than α-tocopherol with 3 to 5-fold longer inhibition times. Compounds carrying electron donating para-substituents in the phenolic or aryltelluro part of the molecule showed the best results. The mechanism for quenching of peroxyl radicals was discussed in the light of calculated OH bond dissociation energies, deuterium labeling experiments and studies of thiol-consumption in the aqueous phase.
Ämnesord
- NATURVETENSKAP -- Kemi -- Organisk kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Organic Chemistry (hsv//eng)
Nyckelord
- Chemistry with specialization in Organic Chemistry
- Kemi med inriktning mot organisk kemi
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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