Реакция #53559

Уравнение реакции

1,1′-thiodi-[2-cyano-5-(3-trifluoromethylpyrazolyl)benzene]

Rongalite

potassium carbonate

2,2,2-trifluoroethyl iodide

→

2-(2,2,2-trifluoroethylthio)-4-(3-trifluoromethylpyrazolyl)benzonitrile

Выход 142.3%

Растворители

water

N,N-dimethylformamide

Условия реакции

Обработка

1. 1
   ДругоеThe resulting reaction mixture
2. 2
   Экстракцияextracted with 50 ml of ethyl acetate twice
3. 3
   ПромывкаThe ethyl acetate layer was washed with 50 ml of water twice
4. 4
   Сушкаdried over anhydrous magnesium sulfate
5. 5
   workup.DISTILLATIONthe ethyl acetate was distilled off under reduced pressure
6. 6
   ДругоеPurification of the residue by silica gel column chromatography

Методика

2.7 g (5.0 mmol) of 1,1′-thiodi-[2-cyano-5-(3-trifluoromethylpyrazolyl)benzene], 3.0 g (19.5 mmol) of Rongalite, 3.0 g (21.7 mmol) of potassium carbonate and 6.1 g (29.0 mmol) of 2,2,2-trifluoroethyl iodide were stirred in 50 ml of N,N-dimethylformamide at room temperature for 3 hours. The resulting reaction mixture was poured into 300 ml of water and extracted with 50 ml of ethyl acetate twice. The ethyl acetate layer was washed with 50 ml of water twice and dried over anhydrous magnesium sulfate, and the ethyl acetate was distilled off under reduced pressure. Purification of the residue by silica gel column chromatography afforded 2.5 g of 2-(2,2,2-trifluoroethylthio)-4-(3-trifluoromethylpyrazolyl)benzonitrile (yield 71.4%) as a brown solid ((m.p. 65-67° C.).

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