[CH3:1][O:2][CH:3]1[CH2:10][CH:9]([CH3:11])[CH:8]2C[CH:4]1[C:5](C)=[CH:6][CH2:7]2.[H][H]>C(O)C.[Pd]>[CH3:1][O:2][CH:3]([CH2:4][CH2:5][CH2:6][CH2:7][CH2:8][CH2:9][CH3:11])[CH3:10]To a solution of 1 g (5.6 mmol) of 4,8-dimethylbicyclo[3.3.1]nona-7-en-2-yl methyl ether [IB] in 10 ml of ethanol was added 0.1 g of 5% of Pd/C and the resulting mixture was heated with stirring at a hydrogen pressure of 20 atm and a reaction temperature of 70° C. for 6 hours. After cooling, the Pd/C was filtered off and the ethanol was distilled off under reduced pressure. The residue was subjected to column chromatography and eluate with toluene gave 0.95 g of the title compound, which had a camphor-like smell.
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