Oxidations of benzyl and phenethyl phenyl sulfides. Implications for the mechanism of the microsomal and biomimetic oxidation of sulfides
作者:Enrico Baciocchi、Osvaldo Lanzalunga、Bruno Pirozzi
DOI:10.1016/s0040-4020(97)00560-7
日期:1997.8
study of the oxidation of 4-methoxyphenethyl phenyl sulfide and 3,4-dimethoxy-phenethyl phenyl sulfide with potassium 12-tungstocobalt(III)ate [Co(III)W] suggests that in the radical cations of 3,4,5-(MeO)3PhCH2SPh (4) and 2,4,6(MeO)3PhCH2SPh (5) the positive charge is not localized on the sulfur atom, but in the benzylic aromatic ring. Nevertheless, in the biomimetic and microsomal oxidation of 4 and
用12钨钴(III)钾盐[Co(III)W]氧化4-甲氧基苯乙基苯硫醚和3,4-二甲氧基-苯乙基苯硫醚的研究表明,在3,4,5-的自由基阳离子中(MeO)3 PhCH 2 SPh(4)和2,4,6(MeO)3 PhCH 2 SPh(5)的正电荷不在硫原子上,而是在苄基芳环上。然而,在仿生和微粒体氧化中的4和5观察到的产物仅是亚砜和砜,这与涉及形成中间硫化物自由基阳离子并随后快速氧回弹的机理相反。直接的氧气转移机制似乎是最有可能的。