Sodium hydride → (4S,5R)-5-[3,5-bis(trifluoromethyl)phenyl]-3-[(3-bromo-6-chloro-4-methylpyridin-2-yl)methyl]-4-methyl-1,3-oxazolidin-2-one

Participants

Reaction Steps

To a solution of (4S,5R)-5-[3,5-bis(trifluoromethyl)phenyl]-4-methyl-1,3-oxazolidin-2-one (30.6 g, 98 mmol) in THF (800 mL) was added NaH (60% dispersion in mineral oil) (3.35 g, 84 mmol). After stirring the reaction at room temperature for 10 minutes, 3-bromo-2-(bromomethyl)-6-chloro-4-methylpyridine (16.7 g, 55.8 mmol) was added as a solution in THF (300 mL). The reaction was stirred at room temperature for 16 hours and then quenched with saturated NH4Cl (200 mL). The mixture was diluted with EtOAc (1 L). The organic layer was separated, washed with water (500 mL) and brine (500 mL), dried over Na2SO4, filtered, and concentrated. Purification of the residue by flash chromatography on silica gel with 0 to 50% EtOAc/heptanes afforded (4S,5R)-5-[3,5-bis(trifluoromethyl)phenyl]-3-[(3-bromo-6-chloro-4-methylpyridin-2-yl)methyl]-4-methyl-1,3-oxazolidin-2-one. LCMS=530.8, 532.8 (M+H)+ 1H NMR (CDCl3, 500 MHz) δ 7.89 (s, 1H), 7.81 (s, 2H), 7.18 (s, 1H), 5.87 (d, J=8.3 Hz, 1H), 5.04 (d, J=17.2 Hz, 1H), 4.42 (m, 1H), 4.32 (d, J=17.3 Hz, 1H), 2.43 (s, 3H), 0.80 (d, J=6.6 Hz, 3H).

Provenance & Evidence