反应详情

169 mg of sodium triacetoxyborohydride was added to a mixed solution 10 ml of 1,2-dichloroethane and 0.05 ml of acetic acid of 142 mg 7-(cyclohexylamino)-1-cyclopentyl-6-fluoro-4-oxo-1,4-dihydroquinoline-3-carbaldehyde and 66 mg of 4-aminophenol, followed by stirring for 24 hours. Aqueous saturated sodium hydrogen carbonate was added thereto, followed by extraction with chloroform. After drying over anhydrous sodium sulfate and subsequent filtration, concentration under a reduced pressure was carried out. The resulting residue was purified by silica gel column chromatography and then crystallized from ethyl acetate to obtain 46 mg of [7-(cyclohexylamino)-1-cyclopentyl-6-fluoro-3-{[(4-hydroxyphenyl)amino]methyl}quinolin-4(1H)-one.

1. extractionfollowed by extraction with chloroform
2. dry with materialAfter drying over anhydrous sodium sulfate and subsequent filtration, concentration under a reduced pressure
3. customThe resulting residue was purified by silica gel column chromatography
4. customcrystallized from ethyl acetate