1,2-Dibromoethane → (2,3-Dihydro-[1,4]dioxino[2,3-c]pyridin-7-yl)methanol

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

A solution of 5-Benzyloxy-2-hydroxymethyl-1H-pyridin-4-one (2 g, 8.7 mmol) in water (220 mL) containing sodium hydroxide (17 mmol) was hydrogenated over 10% palladium on charcoal (1 g) for 4 hours. The mixture was filtered and evaporated to give a white solid. This solid was dissolved in N,N-dimethylformamide (8 mL) then treated with potassium carbonate (2.9 g) and 1,2-dibromoethane (0.6 mL, 7 mmol). The mixture was heated at 85° C. overnight. The cooled mixture was evaporated onto silica and chromatographed eluting with 10-30% methanol in ethyl acetate affording a white solid (250 mg, 21%); MS (APCl+) m/z 168 (MH+).

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