反应详情

To sodium hydride (60% in oil, 9.04 mM) suspended in dry N,N-dimethylformamide (10 ml) under nitrogen, N-isoxazol-3-yl-carbamic acid tert-butyl ester (1.66 g, 9.04 mM) in N,N-dimethylformamide (10 ml) was added dropwise at ambient temperature. Methanesulfonic acid (5R)-3-(3-fluoro-4-iodo-phenyl)-2-oxo-oxazolidin-5-ylmethyl ester (2.5 g, 6.02 mM) in N,N-dimethylformamide (10 ml) was added slowly, and the mixture heated to 75° for 2 hours. After cooling, the mixture was diluted with aqueous sodium bicarbonate (5%, 300 ml), and extracted with ethyl acetate (3×100 ml). The organic phase was washed with water (100 ml) and brine (100 ml), dried (magnesium sulfate), evaporated and crude product purified by chromatography on a 50 g silica Mega Bond Elut® column, eluting with dichloromethane. Relevant fractions were combined to give the title compound (1.73 g).

1. temperaturethe mixture heated to 75° for 2 hours
2. temperatureAfter cooling
3. extractionextracted with ethyl acetate (3×100 ml)
4. washThe organic phase was washed with water (100 ml) and brine (100 ml)
5. dry with materialdried (magnesium sulfate)
6. customevaporated
7. customcrude product purified by chromatography on a 50 g silica Mega Bond Elut® column
8. washeluting with dichloromethane