Spin Trapping of Radical Intermediates Generated by the Oxidation of Substituted 4-Methylphenols
作者:Petr Majzlík、Ladislav Omelka、Renata Superatová、Petra Holubcová
DOI:10.1002/hlca.201000431
日期:2011.7
nitrones. When the starting phenol contained bulky tBu groups in ortho‐position (see 2,6‐di(tert‐butyl)‐4‐methylphenol (1a)), the stable 2,6‐di(tert‐butyl)‐4R‐phenoxy radicals (R=CHN+(O−)X) were detected as the final radical products. The indirect evidence of nitrones in the reaction mixture was performed in one case by the reaction with a RO radicals.
一系列取代的4-甲基酚类的1和2用氧化的PbO 2中的亚硝基化合物的存在3 - 10。建立了在反应混合物中亚硝基自旋陷阱形成的苄基加合物,这表明H原子是从1或2的甲基取代基中抽象出来的。在连续的步骤中,加合物进一步重排为相应的硝酮。当起始酚在邻位含有庞大的t Bu基团时(请参见2,6-di(叔丁基)-4-甲基苯酚(1a)),则稳定的2,6-di(叔丁基)丁基)-4R -苯氧基的基团(R = CHN +(O - ) X)被检测为最终基团的产品。在一种情况下,通过与RO自由基的反应来进行反应混合物中硝酮的间接证据。