Ethyl c-3-bromo-1-methyl-2-oxocyclohexane-r-1-carboxylate (1a) is oxidized by dimethyl sulphoxide to the 2,3-dione derivative (3), whereas the t-3-bromo-isomer (1b) is apparently dehydrogenated to give the bromocyclohexenone (4). The mechanism for the formation of the product (4) is discussed. Allied reactions are described.
K. Sato, S. Inoue, M. Hirayama and M. Ōhashi, J. Chem. Soc., Perkin Trans. 1, 1977, 1647 DOI: 10.1039/P19770001647
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