[C-:1]#[N:2].[Na+].[F:4][C:5]1[CH:6]=[C:7]([C:10]([S:13][C:14]2[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=2)=[CH:11][CH:12]=1)[CH2:8]Cl>CS(C)=O>[F:4][C:5]1[CH:6]=[C:7]([CH2:8][C:1]#[N:2])[C:10]([S:13][C:14]2[CH:19]=[CH:18][CH:17]=[CH:16][CH:15]=2)=[CH:11][CH:12]=118.6 g of sodium cyanide in 222 ml of dimethyl sulphoxide are treated at 50° C with 74 g of 3-fluoro-6-(phenylthio)-benzyl chloride in 75 ml of dimethyl sulphoxide in one portion. The resulting dark solution is stirred at 45°-50° C for 1 hour, subsequently poured on to 1500 ml of ice-water and extracted with ether. The organic phase is washed three times with 500 ml of water each time, dried over sodium sulphate and evaporated. There is obtained 3-fluoro-6-(phenylthio)-phenylacetonitrile as a reddish oil.
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