Formic Acid → Hydroxy{(1S)-4-pyrimidin-2-yl-1-[({4-[5-(2,2,2-trifluoroethoxy)pyrimidin-2-yl]piperazin-1-yl}sulfonyl)methyl]butyl}formamide

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Reaction Steps

To formic acid (114 mL, 3.03 mol) at 0° C. was added acetic anhydride (28.6 mL, 0.303 mol) and the mixture was stirred at RT for 10 minutes. The reaction was then recooled to 0° C., and added to a solution of 2-(4-{[2-(hydroxyamino)-5-pyrimidin-2-ylpentyl]sulfonyl}piperazin-1-yl)-5-(2,2,2-trifluoroethoxy)pyrimidine (30.6 g, 60.5 mmol) and formic acid (114 mL, 3.03 mol) in THF (600 mL). The reaction was brought to room temperature and stirred for one hour. Volatiles were then removed in vacuo, and the residue azeotroped with toluene (2×300 mL). The residue was then dissolved in methanol (300 mL) and heated to 40° C. for one hour. The solution was then cooled to room temperature and concentrated in vacuo. The residue was then purified by flash chromatography (silica gel, 10% MeOH in EtOAc) to give the racemic compound as a pale orange foam (22.94 g, 43 mmol, 71%).

Provenance & Evidence