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- W2885872809 abstract "Benzylic sp3 C–H bonds have been successfully brominated with potassium bromide by using Oxone as an oxidant in water/dichloromethane under visible light at room temperature. Toluene, ethylbenzene and other alkylbenzenes bearing an electron-withdrawing group, such as Br, Cl, COMe, CO2Et, CO2H, CN or NO2, provide the corresponding benzylic monobromides in good to excellent yields in this reaction. Dibromides can also be produced in the presence of excess potassium bromide in a prolonged reaction time. Control of the illuminance of visible light (~500 lux) is crucial to achieving both high yield and high selectivity in these brominations. Mono- and difluorides can be conveniently prepared through nucleophilic substitutions of the benzylic bromides with potassium fluoride." @default.
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- W2885872809 date "2018-08-15" @default.
- W2885872809 modified "2023-10-17" @default.
- W2885872809 title "Visible-Light-Driven Oxidative Mono- and Dibromination of Benzylic sp3 C–H Bonds with Potassium Bromide/Oxone at Room Temperature" @default.
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- W2885872809 doi "https://doi.org/10.1055/s-0037-1610651" @default.
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