Reacción #53576

Ecuación de reacción

2-fluoro-4-(4-trifluoromethylphenyl)benzonitrile

sodium methyl mercaptan

→

2-methylthio-4-(4-trifluoromethylphenyl)benzonitrile

Rendimiento 75.4%

Disolventes

N,N-dimethylformamide

Condiciones de reacción

Tratamiento posterior

1. 1
   Extracciónextracted with 100 ml of ethyl acetate twice
2. 2
   LavadoThe ethyl acetate layer was washed with 100 ml of water twice
3. 3
   Secadodried over anhydrous magnesium sulfate
4. 4
   workup.DISTILLATIONthe ethyl acetate was distilled off under reduced pressure
5. 5
   OtroPurification of the residue by silica gel column chromatography

Procedimiento

To 3.0 g (11.3 mmol) of 2-fluoro-4-(4-trifluoromethylphenyl)benzonitrile in 50 ml of N,N-dimethylformamide, 7.0 g (15.0 mmol) of 15% aqueous sodium methyl mercaptan was added dropwise at room temperature. After 6 hours of stirring at 60° C., the reaction mixture was poured into 200 ml of ice-cold water and extracted with 100 ml of ethyl acetate twice. The ethyl acetate layer was washed with 100 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-methylthio-4-(4-trifluoromethylphenyl)benzonitrile (yield 75%) as white crystals (m.p. 128-129° C.).

Fuente