Réaction #586126

Équation de réaction

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

Rendement 142.3%

Solvants

water

N,N-dimethylformamide

Conditions de réaction

Traitement

1. 1
   AutreThe resulting reaction mixture
2. 2
   Extractionextracted with 50 ml of ethyl acetate twice
3. 3
   LavageThe ethyl acetate layer was washed with 50 ml of water twice
4. 4
   Séchagedried over anhydrous magnesium sulfate
5. 5
   workup.DISTILLATIONthe ethyl acetate was distilled off under reduced pressure
6. 6
   AutrePurification of the residue by silica gel column chromatography

Mode opératoire

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.).

Source