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.0.3 H2O requires: C,51.76; H,3.94; N,18.87%.

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