反应详情

温度

75 °C

To a solution of 199 mg (0.5 mmol) of ethyl 1-ethyl-8-(4-methylpiperazin-1-yl)-6,7,9-trifluoro-4H-quinolizin-4-one-3-carboxylate, from Step 5, in 4 mL of THF is added 4.0 mL of a 1.0N aqueous sodium hydroxide solution and the reaction mixture is heated, with stirring, at 75° C. for 4.5 hours. The reaction mixture is cooled to ambient temperature and adjusted to pH 2 with 5 mL of 1N aqueous hydrochloric acid solution. The aqueous solution is concentrated in vacuo to ~5 mL and the solid is collected by filtration and dried in vacuo to afford the title compound.

1. temperaturethe reaction mixture is heated
2. temperatureThe reaction mixture is cooled to ambient temperature
3. concentrationThe aqueous solution is concentrated in vacuo to ~5 mL
4. filtrationthe solid is collected by filtration
5. customdried in vacuo