反应详情

温度

50 °C

4-Fluoro-1-nitro-2-trifluoromethyl-benz ene (11.5 mmol), trans-cyclohexane-1,4-diol (17.2 mmol), and sodium hydride (60% in oil, 11.5 mmol) are suspended in dry dimethylsulfoxide (20 mL) and the resulting mixture is reacted under stirring for 3 hours at 50° C. The reaction is allowed to reach room temperature and is then further reacted at this temperature overnight. The reaction is treated with water (20 mL), the precipitate formed is removed by filtration and the filtrate is extracted with dichloromethane (50 mL). The organic phase is washed with aqueous saturated ammonium chloride (10 mL), dried over magnesium sulfate, filtered and the filtrate is concentrated under reduced pressure. The precipitate is triturated with diethylether (20 mL), filtered and the filtrate concentrated under reduced pressure. Both fractions of crude product are combined, dissolved in dichloromethane and filtered trough a short pad of silica gel to afford the desired product (36% yield).

1. customthe resulting mixture is reacted
2. customto reach room temperature
3. customis then further reacted at this temperature overnight
4. customthe precipitate formed
5. customis removed by filtration
6. extractionthe filtrate is extracted with dichloromethane (50 mL)
7. washThe organic phase is washed with aqueous saturated ammonium chloride (10 mL)
8. dry with materialdried over magnesium sulfate
9. filtrationfiltered
10. concentrationthe filtrate is concentrated under reduced pressure
11. customThe precipitate is triturated with diethylether (20 mL)
12. filtrationfiltered
13. concentrationthe filtrate concentrated under reduced pressure
14. dissolutiondissolved in dichloromethane
15. filtrationfiltered trough a short pad of silica gel