反应 #155332

反应方程式

hydrochloric acid ethyl acetate

tert-butyl 4-{2-[5-fluoro-3-(4-methoxyphenyl)-4-oxo-8-propoxy-4H-quinolin-1-yl]acetylamino}piperidine-1-carboxylate

→

2-[5-fluoro-3-(4-methoxyphenyl)-4-oxo-8-propoxy-4H-quinolin-1-yl]-N-piperidin-4-ylacetamide

收率 27.5%

溶剂

ethanol

反应条件

后处理

1. 1
   浓缩The resulting mixture was concentrated under reduced pressure
2. 2
   workup.ADDITIONAfter adding an aqueous sodium bicarbonate solution to the residue
3. 3
   洗涤the residue was washed with ethyl acetate
4. 4
   workup.ADDITIONA 2N aqueous sodium hydroxide solution was added to the water layer
5. 5
   萃取followed by extraction
6. 6
   洗涤The thus-obtained organic layer was washed with an aqueous saturated sodium chloride solution
7. 7
   干燥dried over anhydrous magnesium sulfate
8. 8
   浓缩concentrated under reduced pressure
9. 9
   其他The residue was recrystallized from ethanol-ethyl acetate

实验过程

A 4N hydrochloric acid ethyl acetate solution (25 ml) was added to an ethanol solution (12 ml) of tert-butyl 4-{2-[5-fluoro-3-(4-methoxyphenyl)-4-oxo-8-propoxy-4H-quinolin-1-yl]acetylamino}piperidine-1-carboxylate (820 mg, 1.44 mmol), followed by stirring at room temperature for 28 hours. The resulting mixture was concentrated under reduced pressure. After adding an aqueous sodium bicarbonate solution to the residue to adjust the pH to 8, the residue was washed with ethyl acetate. A 2N aqueous sodium hydroxide solution was added to the water layer to adjust its pH to 11, followed by extraction using dichloromethane. The thus-obtained organic layer was washed with an aqueous saturated sodium chloride solution and dried over anhydrous magnesium sulfate, and then concentrated under reduced pressure. The residue was recrystallized from ethanol-ethyl acetate, giving a white powder of 2-[5-fluoro-3-(4-methoxyphenyl)-4-oxo-8-propoxy-4H-quinolin-1-yl]-N-piperidin-4-ylacetamide (185 mg, yield: 27%).

来源