Hydrogen Bromide → 3-(3-Methyl-4-{5-[2-oxo-2-(4-trifluoromethylphenyl)ethyl]pyridin-2-yloxy}phenyl)-1-piperonyltetrahydropyrimidin-2-one hydrobromide

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반응 단계

To a solution of 3-[4-(5-bromopyridin-2-yloxy)-3-methylphenyl]-1-piperonyltetrahydropyrimidin-2-one (0.11 g, 0.22 mmol) in toluene (10 mL) were added Pd2(dba)3 (10 mg, 0.01 mmol) and Xantphos (15 mg, 0.03 mmol) under a nitrogen atmosphere. The resulting solution was stirred for 5 minutes, and then 4′-(trifluoromethyl)acetophenone (63 mg, 0.33 mmol) and potassium bis(trimethylsilyl)amide (66 mg, 0.33 mmol) were added to the reaction solution. The resulting solution was stirred at 70 to 80° C. for 30 minutes, and left to cool. Water was added to the reaction solution, and extracted with ethyl acetate. The ethyl acetate layer was dried over anhydrous magnesium sulfate, and evaporated. The residue was purified by silica gel column chromatography (n-hexane:ethyl acetate=2:1→1:1), to yield 50 mg of a free form. To this free form was added an equivalent amount of hydrobromic acid, to thereby yield 50 mg of the title compound.

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