[Br:1][C:2]1[C:3](=[O:19])[NH:4][C:5](=[O:18])[N:6]([C:8]2[CH:13]=[CH:12][CH:11]=[C:10]([C:14]([F:17])([F:16])[F:15])[CH:9]=2)[CH:7]=1.[C:20](=O)([O-])[O-].[K+].[K+].CI.[Cl-].[NH4+]>CN(C)C=O>[Br:1][C:2]1[C:3](=[O:19])[N:4]([CH3:20])[C:5](=[O:18])[N:6]([C:8]2[CH:13]=[CH:12][CH:11]=[C:10]([C:14]([F:17])([F:16])[F:15])[CH:9]=2)[CH:7]=1
To a solution of 5-bromo-1-(3-trifluoromethylphenyl)pyrimidin-2,4(1H,3H)-dione (prepared in Reference Example 97) (150.0 mg) and potassium carbonate (181.6 mg) in N,N-dimethy formamide (4.0 ml) was added at room temperature, methyl iodide (0.042 ml) and the resulting mixture was stirred at 70° C. for two and a half hours. To the reaction mixture was added saturated aqueous ammonium chloride solution (20.0 ml), and the resulting mixture was extracted with ethyl acetate (20 ml×2) and the organic layer was washed with water (20 ml×2) and saturated saline (20 ml), dried over anhydrous sodium sulfate and then concentrated under reduced pressure. The residue was purified by silica gel column chromatography (eluent: hexane/ethyl acetate) to afford 5-bromo-3-methyl-1-(3-trifluoromethylphenyl)pyrimidin-2,4(1H,3H)-dione (153.6 mg).
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