反応 #53578

反応方程式

4-iodotoluene

3,5-dichloro-4-fluorobenzotrifluoride

water

→

4-(2,6-dichloro-4-trifluoromethylphenyl)toluene

収率 85.1%

溶媒

benzene

n-butyllithium

hexane

diethyl ether

反応条件

後処理

1. 1
   workup.STIRRINGAfter 2 hours of stirring at room temperature
2. 2
   workup.STIRRINGAfter another 12 hours of stirring at room temperature
3. 3
   洗浄The organic layer was washed with 50 ml of water twice
4. 4
   乾燥dried over anhydrous magnesium sulfate
5. 5
   workup.DISTILLATIONThe solvent was distilled off under reduced pressure

実験手順

To 5.7 g (26.1 mmol) of 4-iodotoluene in 30 ml of dry benzene, 17.0 ml of a n-butyllithium solution in hexane (1.60 mol/l) was added dropwise in a nitrogen stream at room temperature with stirring. After 2 hours of stirring at room temperature, 10 ml of 6.0 g (25.8 mmol) of 3,5-dichloro-4-fluorobenzotrifluoride in 10 ml of diethyl ether was added dropwise at 10° C. After another 12 hours of stirring at room temperature, the reaction mixture was poured into 100 ml of water for separation. The organic layer was washed with 50 ml of water twice and dried over anhydrous magnesium sulfate. The solvent was distilled off under reduced pressure to obtain 6.7 g of 4-(2,6-dichloro-4-trifluoromethylphenyl)toluene (yield 85.0%) as a colorless liquid.

出典