C1(C)C=CC=CC=1.C1(C)C=CC(S(O)(=O)=O)=CC=1.[C:19]12([OH:29])[CH2:28][CH:23]3[CH2:24][CH:25]([CH2:27][CH:21]([CH2:22]3)[CH2:20]1)[CH2:26]2.[C:30](O)(=[O:34])[C:31]([CH3:33])=[CH2:32]>O>[C:30]([O:29][C:19]12[CH2:26][CH:25]3[CH2:24][CH:23]([CH2:22][CH:21]([CH2:27]3)[CH2:20]1)[CH2:28]2)(=[O:34])[C:31]([CH3:33])=[CH2:32]200 ml of toluene and 1 g of p-toluenesulfonic acid were added to 70 g of 1-adamantanol and 50 g of methacrylic acid. They were subjected to a reaction with heating and stirring, while water was distilled off using a Dean-Stark trap. The resulting organic phase was washed with water, a 10 mass % aqueous sodium hydrogencarbonate solution and water in this order and distilled to obtain crude 1-adamantyl methacrylate (a crude product) having a purity of 91 mass %.
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