反应详情

To a mixture of 277 mg of ethyl 1-cyclopropyl-5-amino-6,7,8-trifluoro-1,4-dihydro-4-oxoquinoline-3-carboxylate, 318 mg of 1-t-butoxycarbonyl-3-hydroxypyrrolidine, 194 mg of DBU and 3 ml of DMSO was added 74 mg of 55% sodium hydride while the former was stirred at room temperature. After the resultant mixture was stirred for 1 hour at room temperature, the reaction mixture was diluted with chloroform and then successively washed with 10% citric acid and saturated saline. The organic layer was dried over anhydrous sodium sulfate and then concentrated to dryness. The residue was recrystallized from ethanol, whereby 120 mg of 7-(1-t-butoxycarbonyl-3-pyrrolidinyloxy)-1-cyclopropyl-5-amino-6,8-difluoro-1,4-dihydro-4-oxoquinoline-3-carboxylic acid was obtained.

1. washsuccessively washed with 10% citric acid and saturated saline
2. dry with materialThe organic layer was dried over anhydrous sodium sulfate
3. concentrationconcentrated to dryness
4. customThe residue was recrystallized from ethanol