Unusual fischer reaction in the 1-aminobenzimidazole series. Synthesis of pyrido [1,2-a]benzimidazole derivatives

Article abstract of DOI:10.1007/BF00506458

The reaction of N-aminobenzimidazoles with ketones under the conditions of the Fischer reaction, as a result of which derivatives of 1,3-disubstituted pyrido-[1,2-a]benzimidazoles are unexpectedly formed, was investigated. The structure of the latter was