(R)-4-Benzyl-2-oxazolidinone → (R)-4-Benzyl-3-pent-4-enoyloxazolidin-2-one

Participants

Reaction Conditions

Reaction Steps

Dissolve (R)-4-Benzyl-2-oxazolidinone (5.906 g, 33.33 mmoles) and 4-Pentenoyl chloride (4.54 g, 38.33 mmoles) in THF (50 mL). Cool the mixture in a dry ice acetone bath, and add n-Butyl Lithium (36.66 mmoles; 14.66 mL; 10.12 g) dropwise at −78° C. Stir the mixture at −78° C. for 30 min and then warm to ambient temperature. Quench the solution with 60 ml of sat. ammonium chloride, and then extract with 60 ml MTBE. Separate the organics and dry over magnesium sulfate. Filter the drying agent and concentrate under vacuum to an oil (6.96 g). LCMS=100% 260 amu (M+1).

Provenance & Evidence