Hydrochloric Acid → 4-(5-(3,6-dimethyl-2,4-dioxo-1-(3-trifluoromethylphenyl)-1,2,3,4-tetrahydropyrimidin-5-yl)-4-fluoro-1H-pyrazol-1-yl)benzonitrile

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Reaction Conditions

Reaction Steps

To a solution of 4-(5-(3,6-dimethyl-2,4-dioxo-1-(3-trifluoromethylphenyl)-1,2,3,4-tetrahydropyrimidin-5-yl)-1H-pyrazol-1-yl)benzonitrile (prepared in Example 1) (1.0 g) in acetonitrile (20 ml) was added Selectfluor (trade mark) (1.2 g) and the resulting mixture was stirred at 80° C. for four hours. To the reaction mixture was added 10% hydrochloric acid followed by an addition of ethyl acetate (20 ml×2) such the intended products were extracted into an organic layer. The organic layer was washed with 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 4-(5-(3,6-dimethyl-2,4-dioxo-1-(3-trifluoromethylphenyl)-1,2,3,4-tetrahydropyrimidin-5-yl)-4-fluoro-1H-pyrazol-1-yl)benzonitrile (238 mg). UPLC/MS 470 (M+H)/1.023 min. (measurement condition 9)

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