Sodium Acetate → 3-(5-Chloropyrimidin-4-yl)-2-(2,4-difluorophenyl)-1-(1H-1,2,4-triazol-1-yl)butan-2-ol

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A solution of 3-(4,5-dichloropyrimidin-6-yl)-2-(2,4-difluorophenyl)-1-(1H-1,2,4-triazol-1-yl)butan-2-ol, enantiomeric pair B (see Preparation 6(iii)) (0.58 g, 1.46 mmol) in ethanol (20 ml) was hydrogenated at atmospheric pressure and at room temperature in the presence of 10% palladium-on-charcoal (45 mg) and sodium acetate (122 mg, 1.5 mmol) for 7 hours. The catalyst was then removed by filtration and the filtrate was concentrated under reduced pressure. "Flash" chromatography of the residue on silica using ethyl acetate as the eluant provided, after combination and evaporation of the appropriate fractions, the title compound (0.35 g, 72%), m.p. 128° C. Found: C,51.68; H,3.89; N,18.58; C16H14ClF2N5O.0.03 H2O requires: C,51.76; H,3.94; N,18.87%.

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