[Cl-].[CH3:2][N:3]([S+:5]([N:9]([CH3:11])[CH3:10])[N:6]([CH3:8])[CH3:7])[CH3:4].[C-]#N.[Na+]>CO>[C-:2]#[N:3].[CH3:2][N:3]([S+:5]([N:9]([CH3:11])[CH3:10])[N:6]([CH3:8])[CH3:7])[CH3:4]A solution of 60.6 g (0.3 mole) of tris(dimethylamino)sulfonium chloride in 250 ml methanol was mixed with a solution of 14.7 g (0.3 mole) of sodium cyanide in 100 ml methanol, and the sodium chloride that precipitated was filtered off. The filtrate was evaporated to dryness under reduced pressure, and the residue was recrystallized from acetonitrile-ether to give 53.0 g (93%) of tris(dimethylamino)sulfonium cyanide as colorless crystals: mp 214°-216°.
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