Dimethyl Sulfide → (R)-4-((R)-4-Benzyl-2-oxo-oxazolidin-3-yl)-3-(3,5-dichloro-4'-fluoro-biphenyl-4-ylmethyl)-4-oxo-butyraldehyde

Participants

Reaction Conditions

Reaction Steps

Dissolve (R)-4-Benzyl-3-[(S)-2-(3,5-dichloro-4′-fluoro-biphenyl-4-ylmethyl)-pent-4-enoyl]-oxazolidin-2-one (1.95 mmoles; 1.00 g) in dichloromethane (10 ml) and methanol (1 mL). Cool the mixture to −78° C. in a dry ice acetone bath and add ozone subsurface to the reaction with an exotherm to −71° C. The reaction turns blue, and then sweep with nitrogen to a clear color. Add dimethyl sulfide (2 mL; 27.20 mmoles) dropwise at −78° C. Warm the solution to ambient temperature and then test with KI starch paper (test is negative). Remove the solvents under vacuum, extract with MTBE, wash with pH=7 buffer, water, and brine. Concentrate the organics under vacuum to give a white non-crystalline solid (0.81 g). LCMS (M+1=515.39).

Provenance & Evidence