反应详情

温度

70 °C

Sodium azide (0.86 g, 13.2 mmole) was added to a solution of [(8R)-2-oxo-2,3,7,8-tetrahydro[1,4]dioxino[2,3-g][1,3]benzoxazol-8-yl]methyl 4-methylbenzene-sulfonate (5.0 g, 13 mmole) in dimethylformamide (250 mL). The solution was heated at 70° C. for 9 hours. The solvent was then removed in vacuum and replaced with 300 mL of methylene chloride. The mixture was washed with 300 mL portions of water and saturated brine, dried over magnesium sulfate, filtered and evaporated in vacuum to a yellow solid. The crude solid was column chromatographed on silica gel with 3% methanol in methylene chloride to yield the (S)-enantiomer of the title compound as a white solid (2.86 g, 86%).

1. customThe solvent was then removed in vacuum
2. washThe mixture was washed with 300 mL portions of water and saturated brine
3. dry with materialdried over magnesium sulfate
4. filtrationfiltered
5. customevaporated in vacuum to a yellow solid
6. customchromatographed on silica gel with 3% methanol in methylene chloride