To a solution of 1-(3-trifluoromethylphenyl)pyrimidin-2,4(1H,3H)-dione (prepared in Reference Example 98 or 99) (740.0 mg) in tetrahydrofuran (10.0 ml) was added (R)-1-(tert-butyldiphenylsilyloxy)propane-2-ol (1.82 g), triphenylphosphine (1.5 g) and diethyl azodicarboxylate (2.7 ml:2.2 M toluene solution) and the resulting mixture was stirred at room temperature for twelve hours. To the reaction mixture was added water (50 ml), and the resulting mixture was extracted with ethyl acetate (30 ml×2) and the organic layer was washed with water (20 ml) 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 (R)-3-[1-(tert-butyldiphenylsilyloxy)propane-2-yl]-1-(3-trifluoromethylphenyl)pyrimidin-2,4(1H,3H)-dione (969.8 mg).
