反应详情

To a 0° C. solution of 2-({(4S,5R)-5-[3,5-bis(trifluoromethyl)phenyl]-4-methyl-2-oxo-1,3-oxazolidin-3-yl}methyl)-4-(trifluoromethyl)benzaldehyde (99.3 mg, 0.199 mmol) in MeOH (5 mL) was added excess NaBH4. The reaction was stirred for 30 minutes, and then quenched with saturated NH4Cl solution (10 mL), diluted with EtOAc (60 mL), and washed with brine (25 mL). The organic layer was dried over Na2SO4, filtered, and concentrated. Purification of the residue by flash chromatography on silica gel (10 to 50% EtOAc/hexanes) afforded (4S,5R)-5-[3,5-bis(trifluoromethyl)phenyl]-3-[2-(hydroxymethyl)-5-(trifluoromethyl)benzyl]-4-methyl-1,3-oxazolidin-2-one. Rf=0.54 (75% EtOAc/hexanes). LCMS=502.1 (M+1)+. 1H NMR (CDCl3, 500 MHz) δ 7.87 (s, 1H), 7.75 (s, 2H), 7.62 (s, 2H), 7.51 (s, 1H), 5.79 (d, J=8.0 Hz, 1H), 5.06 (d, J=15.5 Hz, 1H), 4.83 (d, J=5.1 Hz, 2H), 4.25 (d, J=15.6 Hz, 1H), 4.01-3.99 (m, 1H), 0.79 (d, J=6.6 Hz, 3H).

1. customquenched with saturated NH4Cl solution (10 mL)
2. additiondiluted with EtOAc (60 mL)
3. washwashed with brine (25 mL)
4. dry with materialThe organic layer was dried over Na2SO4
5. filtrationfiltered
6. concentrationconcentrated
7. customPurification of the residue by flash chromatography on silica gel (10 to 50% EtOAc/hexanes)