反应详情

温度

25 °C

Under nitrogen, to a solution of 25.6 g (0.20 mol) of 4-fluorthiophenol in 500 ml of isopropanol 8.4 g (0.20 mol) of sodium hydroxide in 400 ml of water was added. The mixture was stirred at 25° C. for 2 h, then 58.6 g (16 mmol) of N-[4-cyano-3-trifluoromethyl-phenyl]-2-hydroxy-3-(methanesulfonyloxy)-2-methyl-propionamide in 500 ml of isopropanol was added. Then the mixture was stirred at 25° C. for 5 h, then the pH was adjusted to neutral with concentrated hydrochloric acid and treated with charcoal at reflux temperature. Most of the isopropanol was evaporated in vacuum and 250 ml of 2% aqueous sodium hydroxide solution was added to the residue under vigorous stirring, then the crystalline mixture was left for 1 h, then filtered and washed with water. The dried crystals were recrystallized from a 1:4 mixture of ethyl acetate/petroleum ether, which has a boiling range of 40–70° C.

1. stirringThen the mixture was stirred at 25° C. for 5 h
2. temperatureat reflux temperature
3. customMost of the isopropanol was evaporated in vacuum and 250 ml of 2% aqueous sodium hydroxide solution
4. additionwas added to the residue under vigorous stirring
5. waitthe crystalline mixture was left for 1 h
6. filtrationfiltered
7. washwashed with water
8. customThe dried crystals were recrystallized from a 1:4 mixture of ethyl acetate/petroleum ether, which