Moist kaolin catalyses the regioselective and high-yielding chlorination and bromination of C6H5OR (R=C1–C8 alkyl, But, allyl, cyclohexyl, benzyl) to 4-XC6H4OR (X=Cl and Br, respectively) with NaClO2 and Mn(acac)3 in CH2Cl2 in the absence and presence of NaBr, respectively, under mild and neutral conditions.
M. Hirano, H. Monobe, S. Yakabe and T. Morimoto, J. Chem. Res. (S), 1998, 662 DOI: 10.1039/A804043E
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