反应详情

Dry hydrogen chloride was passed into a solution of 218 g (1.0 mol) of 4,5-dichloro-2-dichloromethylene-imidazole in about 2 liters of dry toluene until the formation of a precipitate had ended (at least 1 mol). After cooling (the addition of HCl was exothermic), filtering off and drying, 235 g (89% of theory) of 4,5-dichloro-2-trichloromethyl-imidazole of melting point 210° C. (with decomposition) were obtained.

1. temperatureAfter cooling (
2. filtrationfiltering off
3. customdrying