反应详情

温度

0 °C

7-Fluoro-1-(2-propen-1-yl)-1,5-naphthyridin-2(1H)-one (1.683 g, 8.25 mmol) was dissolved in 1,4-dioxane (100 ml) and water (50 ml) was added. The solution was cooled to 0° C. and sodium periodate (5.29 g, 24.75 mmol) was added, followed by osmium tetroxide (9 mL of 4% aqueous solution). The stirred mixture was allowed to warm to rt, then stirred at rt for 1 h. The mixture was then treated with a further 100 ml of water and sodium periodate (10.58 g, 49.5 mmol) and stirred at rt for 1 h. The mixture was evaporated to approximately 50 ml and the residue was extracted with 20% methanol in DCM (3×300 ml). The organic extracts were combined, dried over anhydrous magnesium sulphate, filtered and evaporated to give (7-fluoro-2-oxo-1,5-naphthyridin-1(2H)-yl)acetaldehyde (mainly as the methyl hemiacetal) as an off-white solid (1.531 g, 90%).

1. temperatureto warm to rt
2. stirringstirred at rt for 1 h
3. customThe mixture was evaporated to approximately 50 ml
4. extractionthe residue was extracted with 20% methanol in DCM (3×300 ml)
5. dry with materialdried over anhydrous magnesium sulphate
6. filtrationfiltered
7. customevaporated