反应详情

To a mixed solution of 0.5 ml of 4N hydrochloric acid and 0.5 ml of acetic acid was added 235 mg of ethyl 1-[6-(t-butylamino)-3,5-difluoropyridine-2-yl]-6,7,8-trifluoro-4-oxo-1,4-dihydroquinoline-3-carboxylate, and the mixture was heated under reflux with stirring for 7 hours. After adding 1 ml of distilled water, the mixture was allowed to cool, and the precipitate was collected by filtration and washed with ethanol and diisopropylether successively to obtain 182 mg of the title compound as a colorless powder.

1. temperaturethe mixture was heated
2. temperatureunder reflux
3. temperatureto cool
4. filtrationthe precipitate was collected by filtration
5. washwashed with ethanol and diisopropylether successively