Methyl iodide → Ethyl 6-fluoro-7-(pyrrol-1-yl)-1-methyl-1,4-dihydro-4-oxoquinoline-3-carboxylate

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

A mixture of 1.5 g (0.005 mol) of ethyl 6-fluoro-7-(pyrrol-1-yl)-4-hydroxyquinoline-3-carboxylate and 1.4 g (0.01 mol) of potassium carbonate in 10 ml of dimethylformamide is heated for 30 minutes at 60° C. and left to cool, 2.15 g (3×0.005 mol) of methyl iodide are added, the mixture is heated at 80°-90° C. for 4 hours and left to cool, 25 ml of a water/ice mixture are added and the precipitate formed is filtered off and washed with water. The precipitate is receystallized from ethanol to give 1.2 g of a solid melting at 253°-254° C.

Herkunft & Nachweise