Phenyl Isothiocyanate → N-(1,3-dimethyl-2-imidazolidinylidene)-N'-phenyl-thiourea

Participants

Reaction Steps

30.4 g (0.3 mol) of triethylamine are added to a suspension of 58.2 g (0.3 mol) of 1,3-dimethyl-2-imino-imidazolidine hydrobromide in 470 ml of chloroform, at 5°, with stirring. A solution of 40.6 g (0.3 mol) of phenyl isothiocyanate in 235 ml of chloroform is then added dropwise and the reaction mixture is refluxed for 15 hours. After cooling, it is washed with water, dried over sodium sulfate and evaporated in vacuo. Crude N-(1,3-dimethyl-2-imidazolidinylidene)-N'-phenyl-thiourea is obtained and after recrystallisation from ethanol this melts at 195°-196°.

Provenance & Evidence