Fluorine-containing azoles. 2. Reaction of imidazole,benzimidazoles, and perimidines with difluorocarbene

The reaction of difluorocarbene, generated from difluorochloromethane in an alkaline medium or from sodium trifluoroacetate in a neutral medium, with imidazole, tetrahydrobenzimidazole, benzimidazoles, and perimidines leads to the production of their N-difluoromethyl-substituted derivatives.See 1] for communication 1.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 4, pp. 520–523, April, 1984.