Dimethylformamide → HCID 178522922, compound

Participants

Reaction Conditions

Reaction Steps

To a mixture of 0.25 g of 7,8-difluoro-4-hydroxy-3-quinolinecarboxylic acid and 10 mL of dimethyformamide is added 0.20 g of carbonyldiimidazole. The mixture is stirred 18 h at 50° C. and then it is cooled to 25° C. The mixture is treated with 0.10 mL of distilled water and stirred for 5 min. To the resulting solution is added 0.15 mL of 4-chlorobenzylamine. After stirring for 18 hours the solvent is evaporated at reduced pressure and the residue is dissolved in 10 mL of refluxing glacial acetic acid. Hot (100° C.) water is added dropwise until the solution becomes cloudy, and the mixture is allowed to cool to 25° C. The precipitate is collected by filtration and it is washed with two successive 5 mL portions of 50% aqueous acetic acid. It is dried for 18 h at 20 torr and 90° C. This procedure yields the title compound as 280 mg of a white powder.

Provenance & Evidence