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首页> 外文期刊>Chemistry: A European journal >Alkyltelluro Substitution Improves the Radical-Trapping Capacity of Aromatic Amines
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Alkyltelluro Substitution Improves the Radical-Trapping Capacity of Aromatic Amines

机译：烷基碲取代可提高芳香胺的自由基捕获能力

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摘要

The synthesis of a variety of aromatic amines carrying an ortho-alkyltelluro group is described. The new antioxidants quenched lipidperoxyl radicals much more efficiently than alpha-tocopherol and were regenerable by aqueous-phase N-acetylcysteine in a two-phase peroxidation system. The inhibition time for diaryl amine 9 b was four-fold longer than recorded with alpha-tocopherol. Thiol consumption in the aqueous phase was found to correlate inversely to the inhibition time and the availability of thiol is the limiting factor for the duration of antioxidant protection. The proposed mechanism for quenching of peroxyl radicals involves O-atom transfer from peroxyl to Te followed by H-atom transfer from amine to alkoxyl radical in a solvent cage.
机译：描述了带有邻烷基碲基的各种芳族胺的合成。新的抗氧化剂比α-生育酚更有效地淬灭脂质过氧自由基，并且可以在两相过氧化系统中被水相N-乙酰半胱氨酸再生。二芳基胺9b的抑制时间比用α-生育酚记录的时间长四倍。发现水相中的硫醇消耗与抑制时间成反比，硫醇的可用性是抗氧化剂保护持续时间的限制因素。所提出的过氧基自由基的猝灭机理涉及在溶剂笼中O原子从过氧基转移到Te，然后H原子从胺转移到烷氧基。

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