反应详情

8.0 g (27.0 mmol) of thioxanthylium perchlorate [C. C. Price et al, J. Amer. Chem. Soc. 85, 2278 (1963)] are added to a well-stiffed mixture of 3.5 g (53.8 mmol) of potassium cyanide in 4 ml of water and 30 ml of methylene chloride under a nitrogen atmosphere. After one hour, the mixture is dried over potassium carbonate and filtered and the flitrate is concentrated on a vacuum rotary evaporator. Crystallization of the residue from isopropanol gives 5.5 g (91%) of 9-cyano-thioxanthene, melting point 103°-105° C., colourless needles (compound (103), Table I).

1. dry with materialthe mixture is dried over potassium carbonate
2. filtrationfiltered
3. concentrationthe flitrate is concentrated on a vacuum rotary evaporator
4. customCrystallization of the residue from isopropanol