(R)-2-[(4S,5S)-3-Acetyl-4-(3,5-difluoro-benzyl)-2,2-dimethyl-oxazolidin-5-yl]-4-oxo-pyrrolidine-1-carboxylic acid tert-butyl ester → (2R,4S)-2-[(4S,5S)-3-Acetyl-4-(3,5-difluoro-benzyl)-2,2-dimethyl-oxazolidin-5-yl]-4-hydroxy-4-phenyl-pyrrolidine-1-carboxylic acid tert-butyl ester

Participants

Reaction Conditions

Reaction Steps

Add phenyl magnesium bromide (3.0 mL, 9 mmol, 3M in ether) dropwise to an ice cold solution of (R)-2-[(4S,5S)-3-acetyl-4-(3,5-difluoro-benzyl)-2,2-dimethyl-oxazolidin-5-yl]-4-oxo-pyrrolidine-1-carboxylic acid tert-butyl ester (0.40 g, 0.89 mmol) in ether (20 mL). Stir 60 minutes and warm to 23° C. Dilute with ethyl acetate and wash with saturated aqueous ammonium chloride. Purify on silica gel with dichloromethane/ethyl acetate mixtures to give the desired compound as a foam (0.19 g, 41%).

Provenance & Evidence