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A simple and regioselective α-bromination of alkyl aromatic compounds by two-phase electrolysis
Authors:T. Raju  K. Kulangiappar  M. Anbu Kulandainathan  A. Muthukumaran
Affiliation:Electroorganic Division, Central Electrochemical Research Institute, Karaikudi 630 006, India
Abstract:Electrochemical bromination of toluene and substituted toluenes by two-phase electrolysis yields the corresponding α-brominated products. The reaction has been carried out in a single compartment cell with platinum electrodes at 0 °C in chloroform using an aqueous sodium bromide solution (60%) containing a catalytic amount of HBr. Two-phase electrolysis results in high yields (60-95%) of monobromo compounds with very high regioselectivity (>95%).
Keywords:Electrochemical bromination   Two-phase electrolysis   α-Brominated products   Regioselectivity
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