反应 #54971

反应方程式

aluminum chloride

fluorobenzene

1-acetylisonipecotic acid chloride

→

1-acetyl-4-(p-fluorobenzoyl)piperidine

收率 80.0%

反应条件

后处理

1. 1
   workup.ADDITIONA mixture of 93 g
2. 2
   workup.ADDITIONAfter the addition
3. 3
   温度the mixture was refluxed for one hour
4. 4
   workup.ADDITIONThe mixture was poured onto ice
5. 5
   其他the two layers separated
6. 6
   萃取The aqueous layer was extracted twice with chloroform
7. 7
   workup.ADDITIONthe chloroform extracts were added to the organic layer
8. 8
   干燥The organic solution was dried over anhydrous sodium sulfate
9. 9
   过滤filtered
10. 10
    浓缩The filtrate was concentrated

实验过程

A mixture of 93 g. (0.7 mole) of aluminum chloride in 150 ml. of fluorobenzene was stirred while 70 g. (0.37 mole) of 1-acetylisonipecotic acid chloride was added in small portions. After the addition was complete, the mixture was refluxed for one hour. The mixture was poured onto ice and the two layers separated. The aqueous layer was extracted twice with chloroform and the chloroform extracts were added to the organic layer. The organic solution was dried over anhydrous sodium sulfate and filtered. The filtrate was concentrated and 73.7 g. (80%) of 1-acetyl-4-(p-fluorobenzoyl)piperidine was obtained as a crystalline residue. Recrystallization from ligroin-isopropyl ether gave a white crystalline product melting at 75°-78° C.

来源