Hydrochloric Acid → (1S)-[(2R)-(2,4-difluorophenyl)-2-oxiranyl]ethanol

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Reaction Steps

[(1S)-1-[(2R)-2-(2,4-Difluorophenyl)-2-oxiranyl]-ethyl] benzoate (15.9 g) was dissolved in methanol (800 ml), to which 28% sodium methylate-methanol solution (12.9 ml) was added at ice-bath temperature and stirred at room temperature for 6 hours. After 1N-hydrochloric acid (63.2 ml) was added thereto, the solvent was distilled off under reduced pressure. The residue was purified by silica gel chromatography (eluent: hexane/ethyl acetate=6/1 to 2/1) to give (1S)-1-[(2R)-2-(2,4-difluorophenyl)-2-oxiranyl]ethanol (9.7 g) as a colorless oily substance.

Provenance & Evidence