反应详情

7-Fluoro-1-(2-propen-1-yl)pyrido[2,3-b]pyrazin-2(1H)-one (163 mg, 0.795 mmol) was dissolved in 1,4-dioxane (5 ml) and water (5 ml). Sodium periodate (426 mg, 1.99 mmol) was added, followed by osmium tetroxide (0.17 ml of 4% aqueous solution). The mixture stirred at rt for 2 h, and then treated with water (20 ml) and extracted with 20% MeOH/DCM (3×100 ml). The organic extracts were combined, dried over anhydrous magnesium sulphate, filtered and evaporated to give (7-fluoro-2-oxopyrido[2,3-b]pyrazin-1(2H)-yl)acetaldehyde (existing mostly as the methyl hemiacetal) as an impure brown oil (193 mg, 117%).

1. extractionextracted with 20% MeOH/DCM (3×100 ml)
2. dry with materialdried over anhydrous magnesium sulphate
3. filtrationfiltered
4. customevaporated