反应详情

温度

55 °C

In ethanol (50 ml) were dissolved (3R)-2-(2,4-difluorophenyl)-3-(3,4,5,6-tetrahydro-2H-pyran-2-yl)oxy-1-(1H-1,2,4-triazol-1-yl)-2-butanol (4.4 g) and pyridinium p-toluenesulfonate (0.93 g). The solution was stirred for two hours at 55° C. to which was further added pyridinium p-toluenesulfonate (0.20 g), followed by stirring for further two hours at 55° C. The reaction mixture was cooled, then the solvent was distilled off. To the residue was added ethyl acetate (250 ml), which was washed with water (50 ml) and a saturated aqueous solution of sodium chloride (50 ml) successively. The ethyl acetate layer was dried over anhydrous magnesium sulfate, then the solvent was distilled off under reduced pressure. To the residue was added ethyl ether, then precipitating crystals were collected by filtration to give (2R,3R)-2-(2,4-difluorophenyl)-1-(1H-1,2,4-triazol-1-yl)-2,3-butanediol (1.37 g). m.p. 115°-117° C. [α]D =-80.3° C. (c=1.0 in methanol)

1. stirringby stirring for further two hours at 55° C
2. temperatureThe reaction mixture was cooled
3. distillationthe solvent was distilled off
4. additionTo the residue was added ethyl acetate (250 ml), which
5. washwas washed with water (50 ml)
6. dry with materialThe ethyl acetate layer was dried over anhydrous magnesium sulfate
7. distillationthe solvent was distilled off under reduced pressure
8. additionTo the residue was added ethyl ether
9. customprecipitating crystals
10. filtrationwere collected by filtration