Water → 1,5-Naphthyridine-1(2H)-acetaldehyde, 7-fluoro-2-oxo-

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Reaction Conditions

Reaction Steps

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%).

Provenance & Evidence