Water → (1-Benzyl-4-piperidyl)(2,5-dimethoxy-3,4,6-trimethylphenyl)(4-isopropylphenyl)methanol

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n-Butyllithium (1.6 M, 12.0 mL, 19.2 mmol) was added to a solution of 1-bromo-2,5-dimethoxy-3,4,6-trimethylbenzene (4.89 g, 18.87 mmol) in tetrahydrofuran (100 mL) at −78° C., and the mixture was stirred for 30 minutes at the same temperature. To the reaction mixture was added 1-benzyl-4-(4-isopropylbenzoyl)piperidine (5.02 g, 15.6 mmol). The mixture was stirred for 30 minutes at the same temperature, then poured into the water, and extracted twice with ethyl acetate. The organic layers were combined, washed with an aqueous saturated sodium hydrogencarbonate, dried over magnesium sulfate, filtered, and concentrated under reduced pressure. The residue was crystallized from ethyl acetate-hexane to obtain the title compound (6.54 g, yield 83%).

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