反应详情

A mixture of 4′-[(4-{trans-4-[(2-hydroxybut-3-en-1-yl)oxy]cyclohexyl}-5-oxo-7-propyl-4,5-dihydro[1,2,4]triazolo[1,5-a]pyrimidin-6-yl)methyl]biphenyl-2-carbonitrile (0.43 g), 2,6-lutidine (0.18 mL), tert-butyl(dimethyl)silyl trifluoromethanesulfonate (0.36 mL) and tetrahydrofuran (5 mL) was stirred at room temperature for 24 hr. The reaction mixture was added to 1 M hydrochloric acid, and the mixture was extracted with ethyl acetate. The organic layer was washed with saturated sodium hydrogen carbonate and then with saturated brine, and dried over anhydrous magnesium sulfate. The solvent was evaporated under reduced pressure. The residue obtained by purification by silica gel column chromatography was mixed with sodium periodate (0.85 g), acetone (10 mL), acetonitrile (10 mL), water (10 mL) and osmium tetraoxide (0.14 g, 7% immobilized catalyst), and the mixture was stirred at room temperature for 40 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 to give the title compound as a colorless solid (0.43 g, 83%).

1. extractionthe mixture was extracted with ethyl acetate
2. washThe organic layer was washed with saturated sodium hydrogen carbonate
3. dry with materialwith saturated brine, and dried over anhydrous magnesium sulfate
4. customThe solvent was evaporated under reduced pressure
5. customThe residue obtained by purification by silica gel column chromatography
6. stirringthe mixture was stirred at room temperature for 40 hr
7. filtrationThe precipitate was filtered off
8. extractionthe filtrate was extracted with ethyl acetate
9. washThe organic layer was washed with saturated brine
10. dry with materialdried over anhydrous magnesium sulfate
11. customThe solvent was evaporated under reduced pressure