Benzenepropanoyl chloride → (S)-4-BENZYL-3-(3-PHENYLPROPANOYL)OXAZOLIDIN-2-ONE

Participants

Reaction Steps

1.6 M of n-Butyllithium in hexanes (35 mL) was added to a solution of (S)-4-benzyloxazolidin-2-one (10 g, 56.4 mmol) in THF (150 mL) at −78° C. After 15 minutes, intermediate (7a) (9.5 g, 56.4 mmol) in THF (20 mL) was added dropwise at −78° C. After 30 minutes, the mixture was allowed to warm to room temperature and was stirred overnight. The mixture was concentrated in vacuo and the crude material was extracted with EtOAc (3×200 mL) and water (100 mL). The combined organic extracts were dried over Na2SO4, filtered, and concentrated in vacuo to yield intermediate (7b), which was used in the next step without further purification.

Provenance & Evidence