反应详情

温度

-78 °C

Methyl {[5′-isopropyl-2′-methoxy-4-(trifluoromethyl)biphenyl-2-yl]methyl}[3-(methylthio)-5-(trifluoromethyl)benzyl]carbamate (21.7 mg, 0.037 mmol) (Example 129) in CH2Cl2 (1 mL) was cooled to −78° C. Next, m-CPBA (8.3 mg, 0.037 mmol) was added. The reaction was stirred at −78° C. for fifteen minutes, then was warmed to −45° C., and after five minutes at −45° C. was poured into NaHSO3 (10 mL). The mixture was extracted with EtOAc (50 mL), and the organic extracts were washed with water (10mL), brine (10 mL), dried over Na2SO4, filtered, and concentrated. Purification by flash chromatography with 50% EtOAc/hexanes afforded methyl{[5′-isopropyl-2′-methoxy-4-(trifluoromethyl)biphenyl-2-yl]methyl}[3-(methylsulfinyl)-5-(trifluoromethyl)benzyl]carbamate. Rf=0.20 (50% EtOAc/hexanes). LCMS=602.2 (M+1)+.1H NMR (C6D6, 500 MHz, 70° C.) δ 7.63 (broad singlet, 1H), 7.54 (broad singlet, 1H), 7.48 (broad singlet, 1H), 7.33 (s, 1H), 7.32 (s, 1H), 7.07-7.05 (m, 2H), 6.89 (s, 1H), 6.62 (d, J=8.0 Hz, 1H), 4.41 (broad singlet, 2H), 4.04 (broad singlet, 2H), 3.37 (s, 3H), 3.30 (s, 3H), 2.75 (m, 1H), 1.93 (s, 3H), 1.16 (d, J=6.5 Hz, 6H).

1. temperaturewas warmed to −45° C.
2. extractionThe mixture was extracted with EtOAc (50 mL)
3. washthe organic extracts were washed with water (10mL), brine (10 mL)
4. dry with materialdried over Na2SO4
5. filtrationfiltered
6. concentrationconcentrated
7. customPurification by flash chromatography with 50% EtOAc/hexanes