M. Hirano et al., NUCLEAR MONOBROMINATION OF ALKYL PHENYL ETHERS WITH NACLO2, NABR, MN(ACAC)(3), AND MOIST SILICA-GEL IN APROTIC-SOLVENT, Synthetic communications, 28(8), 1998, pp. 1463-1470
Nuclear monobromination of aromatic ethers can be achieved with a NaCl
O2/NaBr/Mn(acac)(3) catalyst/silica gel system in dichloromethane in r
egioselective and high-yielding manner under mild conditions.