反应详情

((4S,5S)-5-[3,5-bis(trifluoromethyl)phenyl]-4-methyl-1,3-oxazolidin-2-one) (46.2 mg, 0.148 mmol) was placed in a dry flask and DMA (3 mL) was added. NaHMDS (296 μL of a 1M solution in THF, 0.296 mmol) was added and the reaction was stirred for 5 min. At this time, 2′-(bromomethyl)-5-isopropyl-4′-(trifluoromethyl)biphenyl-2-yl methyl ether (80.0 mg, 0.207 mmol) was added by cannula in DMA (2 mL). After 30 min, the reaction was quenched with saturated NH4Cl (2 mL). The mixture was diluted with EtOAc (40 mL). The organic layer was washed with water (15 mL), and brine (15 mL), dried over Na2SO4, filtered, and concentrated. Purification of the residue by flash chromatography with 25% EtOAc/hexanes afforded (4S,5S)-5-[3,5-bis(trifluoromethyl)phenyl]-3-{[5′-isopropyl-2′-methoxy-4-(trifluoromethyl)biphenyl-2-yl]methyl}-4-methyl-1,3-oxazolidin-2-one. Rf=0.27 (25% EtOAc/hexanes). LCMS=620.2 (M+1)+. 1H NMR (CDCl3, 500 MHz; atropisomers present) δ 6.90-7.88 (m, 9H), 4.04-5.05 (m, 3H), 3.25-3.74 (m, 4H), 2.88 (m, 1H), 1.19-1.24 (m, 6H), 0.99-1.07 (m, 3H).

1. waitAfter 30 min
2. customthe reaction was quenched with saturated NH4Cl (2 mL)
3. additionThe mixture was diluted with EtOAc (40 mL)
4. washThe organic layer was washed with water (15 mL), and brine (15 mL)
5. dry with materialdried over Na2SO4
6. filtrationfiltered
7. concentrationconcentrated
8. customPurification of the residue by flash chromatography with 25% EtOAc/hexanes