反应详情

A solution of 1.26 g (2.80 mmole) of 7-[3-(butoxycarbonyl)amino-1-pyrrolidinyl]-1-cyclopropyl-6,8-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid in 25 ml of trifluoroacetic acid was stirred at room temperature until gas evolution ceased. The solvent was removed in vacuo and the residue dissolved in 1.0N sodium hydroxide. The solution was diluted to 20 ml with water and acidified to pH 5.5 with 6N hydrochloric acid. The precipitate was removed by filtration, washed with water, ethanol, and ethyl ether. The residue was dried in vacuo to give 0.95 g (97%) of the title compound, mp 290°-292° C.

1. customThe solvent was removed in vacuo
2. dissolutionthe residue dissolved in 1.0N sodium hydroxide
3. additionThe solution was diluted to 20 ml with water
4. customThe precipitate was removed by filtration
5. washwashed with water, ethanol, and ethyl ether
6. customThe residue was dried in vacuo