Sodium hydride → Ethyl 3-(3-bromobenzyl)-4-(4-cyanophenyl)-6-methyl-2-oxo-1-[3-(trifluoromethyl)phenyl]-1,2,3,4-tetrahydropyrimidine-5-carboxylate

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Reaction Steps

Sodium hydride (55.9 mg 1.397 mmol; 60% dispersion in mineral oil) is washed with pentane (2×10 ml) and suspended in tetrahydrofuran (10 ml). A solution of ethyl 4-(4-cyanophenyl)-6-methyl-2-oxo-1-[3-(trifluoromethyl)phenyl]-1,2,3,4-tetrahydropyrimidine-5-carboxylate (Example 4A) (500 mg, 1.164 mmol) in tetrahydrofuran (5 ml) is added with stirring. After 5 minutes at room temperature, a solution of 1-bromo-3-(bromomethyl)benzene (320 mg, 1.23 mmol) in tetrahydrofuran (5 ml) is added, and the reaction is stirred at room temperature for 16 h. The solution is quenched with water (50 ml) and extracted with ethyl acetate (3×150 ml). The combined organic phases are washed with brine, dried over anhydrous magnesium sulfate, filtered and concentrated. The yellow residue (approximately 1.05 g) is purified by flash chromatography over silica gel 60 (50 g) with cyclohexane/ethyl acetate (5:1) as eluent.

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