Potassium Carbonate → Ethyl 6-fluoro-7-(pyrrol-1-yl)-1-cyclopropylmethyl-4-oxo-1,4-dihydroquinoline-3-carboxylate

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반응 단계

A mixture of 3.6 g (0.012 mol) of ethyl 6-fluoro-7-(pyrrol-1-yl)-4-hydroxyquinoline-3-carboxylate and 4.15 g (0.03 mol) of potassium carbonate in 30 ml of dimethlformamide is heated for 30 minutes at 80° C. and left to cool, 8 g (0.06 mol) of cyclopropylmethyl bromide are added, the mixture is kept for 12 hours at 90° C. and left to cool, 80 ml of a water/ice mixture are added and the precipitate formed is filtered off, washed with water and recrystallized from ethanol to give 2.65 g of a solid melting at 125°-127° C.

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