反应详情

To a solution of oxazolidinone 27.4 (71.8 mg, 0.107 mmol) dissolved in THF (10 mL), was added a 30% hydrogen peroxide solution (0.121 mL, 1.07 mmol) followed by a 2M LiOH solution (0.268 mL, 0.535 mmol). The resulting slurry was stirred for two hours. The reaction mixture was diluted with water and acidified with hydrochloric acid to a pH ˜3. The mixture was then extracted with EtOAc (1×50 mL), and the organic layer was washed with acidic sodium sulfite solution (2×30 mL), brine (1×30 mL), and dried over magnesium sulfate. The filtrate was concentrated under reduced pressure, and the residue was purified by reverse phase HPLC to give 27 (25.2 mg). MS ESI (pos.) m/e 511.1 (M+H). 1H NMR (400 MHz, DMSO-d6) δ ppm 12.21 (1H, br. s.), 10.51 (1H, s), 8.75 (1H, d, J=1.6 Hz), 8.15 (2H, d, J=8.2 Hz), 7.91 (2H, d, J=8.2 Hz), 7.87 (1H, s), 7.74 (1H, d, J=8.2 Hz), 7.38 (1H, t, J=7.8 Hz), 7.23 (2H, d, J=8.6 Hz), 7.19 (1H, d, J=7.8 Hz), 6.96 (2H, d, J=9.0 Hz), 6.50 (1H, d, J=1.6 Hz), 5.08 (2H, s), 4.48 (1H, t, J=7.8 Hz), 3.07 (1H, dd, J=16.4, 8.2 Hz), 2.88 (1H, dd, J=16.2, 7.2 Hz).

1. extractionThe mixture was then extracted with EtOAc (1×50 mL)
2. washthe organic layer was washed with acidic sodium sulfite solution (2×30 mL), brine (1×30 mL)
3. dry with materialdried over magnesium sulfate
4. concentrationThe filtrate was concentrated under reduced pressure
5. customthe residue was purified by reverse phase HPLC