Sodium Hydroxide → [(4S,5R)-2-Oxo-4,5-diphenyl-1,3-oxazolidin-3-yl]acetic acid

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Reaction Steps

Ethyl (4,5-cis-diphenyl-2-oxo-3-oxazolidinyl)acetate (40.6 g, 125 mmol) was dissolved in tetrahydrofuran (100 ml) and a solution of sodium hydroxide (6 g, 150 mmol) in water (40 ml) was added thereto. The mixture was stirred at room temperature for 15 minutes. To the homogeneous solution was added water (150 ml) and the mixture was washed twice with diisopropyl ether (20 ml). The aqueous layer was adjusted to pH 2 with a 10-fold dilution of concentrated hydrochloric acid and extracted with ethyl acetate. The extract was dried over magnesium sulfate and filtered. The filtrate was concentratred and the residue was recrystallized from methylenechloride-n-hexane mixture to give the title compound (29.1 g) as white crystals.

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