反应详情

15 ml of methanol, 15 ml of THF and 250 mg of sodium cyanoborohydride were added to 300 mg of 7-(cyclohexylamino)-1-cyclopentyl-6-fluoro-4-oxo-1,4-dihydroquinoline-3-carbaldehyde oxime. 2 ml of a 4 M hydrogen chloride dioxane solution was added thereto under ice-cooling, followed by stirring at room temperature for 3 hours. Under ice-cooling, aqueous 1 M sodium hydroxide solution was added thereto, followed by extraction with chloroform and subsequent washing with aqueous saturated sodium chloride. After drying over anhydrous sodium sulfate, the solvent was evaporated under a reduced pressure, and the resulting residue was purified by silica gel column chromatography to obtain 130 mg of 7-(cyclohexylamino)-1-cyclopentyl-6-fluoro-3-[(hydroxyamino)methyl]quinolin-4(1H)-one.

1. temperatureunder ice-cooling
2. temperatureUnder ice-cooling
3. extractionfollowed by extraction with chloroform
4. washsubsequent washing with aqueous saturated sodium chloride
5. dry with materialAfter drying over anhydrous sodium sulfate
6. customthe solvent was evaporated under a reduced pressure
7. customthe resulting residue was purified by silica gel column chromatography