Ceric ammonium sulphate oxidation of 1-md 1, 4-disubstituted naphthalenes gives 2-and/or 2, 3-disubstituted 1, 4-naphthoquinones through migration of substituents (D, Br, Ph). Similar rearrangements are also observed in the manganese (III) oxidation and also in the anodic oxidation of these substrates. The results are consistent with the proposal that these oxidations go through the formation of radical cation followed by reaction with H2O and ...