反应详情

A suspension of 0.23 g (0.65 mmoles) of 6-fluoro-7-ethylthio-(1,1-dimethylethyl)-1,4-dihydro-4-oxo-1,8-naphthyridine-3-carboxylic acid ethyl ester in 1 mL of water was treated with 1.3 mL of 1N aqueous sodium hydroxide and the mixture was heated under reflux for 45 minutes. The resulting precipitate was acidified with 1 mL of 2N hydrochloric acid, filtered, washed with water and dried in vacuo at 50° C. to give 0.196 g of titled compound. MP 215° C.

1. temperaturethe mixture was heated
2. temperatureunder reflux for 45 minutes
3. filtrationfiltered
4. washwashed with water
5. customdried in vacuo at 50° C.