Limits to oxidation of organic substrates. SET oxidative processes of commonly used solvents as revealed through the photochemical reaction with 1,2,4,5- benzenetetracarbonitrile
作者:Maurizio Fagnoni、Matteo Vanossi、Mariella Mella、Angelo Albini
DOI:10.1016/0040-4020(95)01013-0
日期:1996.1
chemical reactivity upon single electron transfer of some common solvents has been explored. This has been obtained by using photo excited benzene-1,2,4,5-tetracarbonitrile (TCB) as the oxidant. Under this condition acetonitrile, isobutyronitrile, methanol and trifluoroethanol all undergo α-deprotonation from their radical cations giving alkyl radicals which are trapped by TCB−. and yield aikylbenzenetricarbonitriles
已经探索了一些常见溶剂在单电子转移时的化学反应性。这是通过使用光激发苯-1,2,4,5-四腈(TCB)作为氧化剂而获得的。在这种条件下,乙腈,异丁腈,甲醇和三氟乙醇均会从其自由基阳离子经历α-去质子化,从而产生被TCB捕获的烷基自由基-。并生成烷基苯三甲腈或由其衍生的产品。两种脂族腈的反应仅在质子添加剂的存在下发生,并伴有导致甲基(或异丙基)自由基的不同断裂。三氟乙酸可能通过阴离子的氧化而脱羧。在纯甲醇中(而不是在MeOH-MeCN混合物中)进行TCB辐照会导致质子加成到氰基上。最终得到双氰基吲哚。