Condensed isoquinolines. 38*. Azolo[<Emphasis Type="Italic">b</Emphasis>]isoquinolines from 2-(halomethyl)benzoic acid derivatives

On interacting 2-(chloromethyl)-, 2-(bromomethyl)benzonitrile or methyl 2-(bromomethyl)benzoate with 1-R-1H-imidazoles and 1-R-1H-benzimidazoles quaternary diazolium salts are formed, the heating of which with bases (K₂CO₃, Et₃N) led to the intramolecular acylation products, 1-alkyl-10-amino-1H-imidazo1,2-b]isoquinolin-4-ium halides, 5-alkyl-6-amino-5H-benzimidazo1,2-b]isoquinolin-12-ium halides, or 1-alkyl-1H-imidazo1,2-b]isoquinolin-4-ium-10-olate halides.