Реакция #586153

Уравнение реакции

2,4-dichlorophenylboronic acid

4-bromo-2-fluorobenzonitrile

sodium carbonate

toluene

→

2-fluoro-4-(2,4-dichlorophenyl)benzonitrile

Выход 94.0%

Растворители

water

ethanol

Условия реакции

Обработка

1. 1
   Температураunder reflux
2. 2
   Температураwith heating for 2 hours
3. 3
   workup.ADDITIONThe reaction mixture was poured into ice-cold water
4. 4
   Экстракцияextracted with toluene
5. 5
   ПромывкаThe toluene layer was washed with water twice
6. 6
   Сушкаdried over anhydrous magnesium sulfate
7. 7
   workup.DISTILLATIONThe solvent was distilled off under reduced pressure

Методика

1.0 g (5.2 mmol) of 2,4-dichlorophenylboronic acid, 1.1 g (5.5 mmol) of 4-bromo-2-fluorobenzonitrile, 1.6 g (15.0 mmol) of sodium carbonate and 0.8 g (0.7 mmol) of tetrakis(triphenylphosphine) palladium were added to a solvent mixture of 50 ml of toluene, 25 ml of ethanol and 25 ml of water, and the reaction was carried out under reflux with heating for 2 hours. The reaction mixture was poured into ice-cold water and extracted with toluene. The toluene layer was washed with water twice and dried over anhydrous magnesium sulfate. The solvent was distilled off under reduced pressure to obtain 1.3 g of 2-fluoro-4-(2,4-dichlorophenyl)benzonitrile (yield 93.0%), which was used in Example 8 (1) as the starting material.

Источник