化学
光化学
羟基化
氢原子
双功能
氧原子
氧气
键裂
反应中间体
催化作用
分子
有机化学
酶
烷基
作者
Joshua Paolillo,Alana Duke,Emma Gogarnoiu,Dan Wise,Marvin Parasram
摘要
A photoexcited-nitroarene-mediated anaerobic C–H hydroxylation of aliphatic systems is reported. The success of this reaction is due to the bifunctional nature of the photoexcited nitroarene, which serves as the C–H bond activator and the oxygen atom source. Compared to previous methods, this approach is cost- and atom-economical due to the commercial availability of the nitroarene, the sole mediator of the reaction. Because of the anaerobic conditions of the transformation, a noteworthy expansion in substrate scope can be obtained compared to prior reports. Mechanistic studies support that the photoexcited nitroarenes engage in successive hydrogen atom transfer and radical recombination events with hydrocarbons, leading to N-arylhydroxylamine ether intermediates. Spontaneous fragmentation of these intermediates leads to the key oxygen atom transfer products.
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