Trifluoroacetic acid → 1-(3-Hydroxy-propyl)-5-trifluoromethyl-1H-pyrimidine-2,4-dione

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A solution of 1-[3-(tert-butyl-dimethyl-silanyloxy)-propyl]-5-trifluoromethyl-1H-pyrimidine-2, 4-dione (Prep 19, 0.86 g, 2.4 mmol) in DCM (10 mL) was cooled at 0° C. and then TFA (2.8 mL, 36 mmol) was added. The mixture was stirred for 1 hour at room temperature and then the solvent was evaporated. The crude was purified by flash chromatography with ethyl acetate-petroleum ether (7-3) to afford the title compound (0.33 g, 57% yield).

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