C1(C)C=CC(S(O)(=O)=O)=CC=1.C1(C=CC(O)=CC=1)O.[C:20]([CH:23]1[CH2:28][CH2:27][C:26]([O:29][CH3:30])=[CH:25][CH2:24]1)(=[O:22])[CH3:21].C[O-].[Na+].CC(=O)CCCCCC>C1C=CC=CC=1.O>[CH3:30][O:29][C:26]12[CH2:27][CH2:28][CH:23]([CH2:24][CH2:25]1)[C:20](=[O:22])[CH2:21]2A mixture of 13.2 g. of p-toluenesulfonic acid and 0.9 g. of hydroquinone in 540 ml. of benzene was heated at reflux under a Dean Stark trap until no more water was evolved. A solution of 90.6 g. of 1-Acetyl-4-methoxy-3-cyclohexene in 750 ml. of benzene was then added to the refluxing soltuion over 6 hrs. Following an additional hr's heating the mixture was cooled and treated with 16 ml. of 4.64N methanolic sodium methoxide. The mixture was washed twice with water and the solvent evaporated in vacuum. The residual oil was distilled at 0.45 mm to afford 64.2 g. of bicyclic ketone 4-Methoxybicyclo[2,2,2].octan-2-one, bp 77°-82°.
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