[Br:1][C:2]1[CH:7]=[CH:6][C:5]([CH:8]([CH:10]2[CH2:15][CH2:14][CH2:13][CH2:12][CH2:11]2)[OH:9])=[CH:4][CH:3]=1>C(Cl)Cl.C(OCC)(=O)C.[O-2].[O-2].[Mn+4]>[Br:1][C:2]1[CH:3]=[CH:4][C:5]([C:8]([CH:10]2[CH2:11][CH2:12][CH2:13][CH2:14][CH2:15]2)=[O:9])=[CH:6][CH:7]=1To a solution of (4-bromophenyl)(cyclohexyl)methanol (3.45 g, 12.82 mmol) in DCM (100 ml) was added manganese dioxide (11.14 g, 128 mmol) at room temperature. The reaction mixture was stirred overnight at room temperature. The reaction mixture was diluted with ethyl acetate and the organic phase was washed with aqueous NaHCO3 solution and brine. The organic phase was dried over Na2SO4, filtered and concentrated in vacuo to obtain the title compound as slightly orange solid.
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