[CH3:1][O:2][C:3]1[CH:8]=[CH:7][C:6]([C:9]2[CH2:14][CH2:13][CH2:12][C:11](=[O:15])[CH:10]=2)=[CH:5][CH:4]=1.[H][H].[Cr](O[Cr]([O-])(=O)=O)([O-])(=O)=O.[NH+]1C=CC=CC=1.[NH+]1C=CC=CC=1.FC(F)(F)C([O-])=O.[NH+]1C=CC=CC=1>CO.ClCCl.[Pd]>[CH3:1][O:2][C:3]1[CH:4]=[CH:5][C:6]([CH:9]2[CH2:14][CH2:13][CH2:12][C:11](=[O:15])[CH2:10]2)=[CH:7][CH:8]=1
1.5 g of 5% palladium on active carbon are added to 15.15 g of 3-(4-methoxyphenyl)-2-cyclohexen-1-one in 400 ml of methanol and stirring is carried out in a hydrogen atmosphere for 4 hours. The catalyst is filtered off and the reaction mixture is concentrated. The mixture so obtained is dissolved in 200 ml of dichloromethane and stirred with 26.9 g of pyridinium dichromate and 2.1 g of pyridinium trifluoroacetate at room temperature for 6 hours. The reaction mixture is decanted, concentrated and purified over silica gel. 3-(4-Methoxyphenyl)cyclohexanone is obtained in the form of a colourless oil.
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