反应详情

温度

110 °C

13.5 g of 7-chloro-3-ethoxycarbonyl-6-fluoro-4-hydroxyquinoline and 13.8 g of potassium carbonate in 160 cm3 of DMF were stirred and heated at 110° C. for 1 hour in a round-bottomed flask equipped with a reflux condenser. After cooling to 60° C., the solution was treated with 24 g of allyl bromide. The mixture was stirred and heated at 100° C. until the medium was neutral (duration: about 6 hours). The solvent was evaporated off in vacuo, the residue was taken up in 300 cm3 of water and the reaction product was extracted with chloroform (3×100 cm3). The combined organic extracts were washed with water, dried (MgSO4) and evaporated to dryness. The residue was recrystallised from 72 cm3 of isopropanol. 12 g of 1-allyl-7-chloro-3-ethoxycarbonyl-6-fluoro-4-oxo-1,4-dihydroquinoline, m.p.=162°-164° C., were obtained.

1. customequipped with a reflux condenser
2. temperatureAfter cooling to 60° C.
3. temperatureheated at 100° C. until the medium
4. customThe solvent was evaporated off in vacuo
5. extractionthe reaction product was extracted with chloroform (3×100 cm3)
6. washThe combined organic extracts were washed with water
7. dry with materialdried (MgSO4)
8. customevaporated to dryness
9. customThe residue was recrystallised from 72 cm3 of isopropanol