反应详情

温度

-74 °C

m-Chloroperoxybenzoic acid (47 mg, 70% purity) was added at −78° C. to a stirred solution of 4-[5-(3,5-dichlorophenyl)-4,5-dihydro-5-(trifluoromethyl)-3-isoxazolyl]-N-[2-(methylthio)ethyl]-1-naphthalenecarboxamide (i.e. the product of Example 1, Step D, 100 mg) in dichloromethane (10 mL). The reaction mixture was stirred at −78 to −70° C. for 2.5 h, then quenched with saturated aqueous sodium bicarbonate and extracted with dichloromethane. The organic extract was washed with brine, dried over sodium sulfate, and concentrated under reduced pressure to provide the title compound (102 mg), a compound of this invention, as a white solid. 1H NMR (CDCl3): δ 8.78 (d, 1H), 8.29 (d, 1H), 7.42-7.64 (m, 7H), 7.37 (br t, 1H), 4.23 (d, 1H), 4.00 (q, 2H), 3.88 (d, 1H), 3.18 (dt, 1H), 2.89 (dt, 1H), 2.62 (s, 3H).

1. customquenched with saturated aqueous sodium bicarbonate
2. extractionextracted with dichloromethane
3. extractionThe organic extract
4. washwas washed with brine
5. dry with materialdried over sodium sulfate
6. concentrationconcentrated under reduced pressure