Nitric Acid → HCID 11614252, compound

Participants

Reaction Steps

To a solution of (4S,5R)-5-[3,5-bis(trifluoromethyl)phenyl]-3-{[2′-methoxy-4-(trifluoromethyl)biphenyl-2-yl]methyl}-4-methyl-1,3-oxazolidin-2-one (example 143) (159.4 mg, 0.276 mmol) in HOAc (5 mL) was added HNO3 (1.5 mL). After 45 minutes, additional HNO3 (1.5 mL) was added. 45 minutes later, the reaction was quenched by pouring into ice water (30 mL). The mixture was extracted with EtOAc (75 mL), and the organic layer was washed with 1 N NaOH, saturated NaHCO3, and brine (25 mL each). The organic layer was dried over Na2SO4, filtered, and concentrated. Purification of the residue by flash chromatography on silica gel (8 to 40% EtOAc/hexanes) afforded (4S,5R)-5-[3,5-bis(trifluoromethyl)phenyl]-3-{[2′-methoxy-5′-nitro-4-(trifluoromethyl)biphenyl-2-yl]methyl}-4-methyl-1,3-oxazolidin-2-one. Rf=0.11 (25% EtOAc/hexanes). LCMS=623.1 (M+1)+. 1H NMR (CDCl3, 500 MHz, rotamers present) δ 8.34 (m, 1H), 8.10 (m, 1H), 7.85 (d, J=6.9 Hz, 1H), 7.61-7.71 (m, 4H), 7.40 (m, 1H), 7.11 (m, 1H), 5.66 (d, J=8.0 Hz), 5.28 (d, J=8.2 Hz), 4.89-4.94 (m, 1H), 3.74-4.09 (m, 5H), 0.61 (d, J=6.6 Hz), 0.47 (d, J=6.5 Hz).

Provenance & Evidence