反应详情

A mixture of ethyl 2-[(trans-4-{6-[(2′-cyanobiphenyl-4-yl)methyl]-5-oxo-7-propyl[1,2,4]triazolo[1,5-a]pyrimidin-4(5H)-yl}cyclohexyl)oxy]pent-4-enoate (0.98 g), sodium periodate (1.7 g), acetone (20 mL), acetonitrile (20 mL), water (20 mL) and osmium tetraoxide (0.30 g, 7% immobilized catalyst) was stirred at room temperature for 14 hr. The precipitate was filtered off, and the filtrate was extracted with ethyl acetate. The organic layer was washed with saturated brine, and dried over anhydrous magnesium sulfate. The solvent was evaporated under reduced pressure, and the residue was dissolved in tetrahydrofuran (5 mL) and methanol (10 mL), sodium tetrahydroborate (0.10 g) was added at 0° C., and the mixture was stirred at 0° C. for 2 hr. Saturated aqueous sodium hydrogen carbonate solution was added to the reaction mixture. After evaporation of the solvent under reduced pressure, the residue was extracted with ethyl acetate. The organic layer was washed with saturated brine, and dried over anhydrous magnesium sulfate. The solvent was evaporated under reduced pressure, and the residue was purified by silica gel column chromatography to give the title compound as a colorless solid (0.37 g, 37%).

1. filtrationThe precipitate was filtered off
2. extractionthe filtrate was extracted with ethyl acetate
3. washThe organic layer was washed with saturated brine
4. dry with materialdried over anhydrous magnesium sulfate
5. customThe solvent was evaporated under reduced pressure
6. dissolutionthe residue was dissolved in tetrahydrofuran (5 mL)
7. additionmethanol (10 mL), sodium tetrahydroborate (0.10 g) was added at 0° C.
8. stirringthe mixture was stirred at 0° C. for 2 hr
9. additionSaturated aqueous sodium hydrogen carbonate solution was added to the reaction mixture
10. customAfter evaporation of the solvent under reduced pressure
11. extractionthe residue was extracted with ethyl acetate
12. washThe organic layer was washed with saturated brine
13. dry with materialdried over anhydrous magnesium sulfate
14. customThe solvent was evaporated under reduced pressure
15. customthe residue was purified by silica gel column chromatography