Abstract
In the presence of hydrochloric acid, o-(2, 2-dicyanovinyl) aminoaniline is easily converted into 4-amino-1H-1, 5-benzodiazepine-3-carbonitrile, which can be hydrolyzed with various bases to other diazepine, triazepine or benzimidazole derivatives. Ethyl 4-amino-1H-1, 5-benzodiazepine-3-carboxlate and other 1, 5-benzodiazepine derivatives were also obtained from similar reactions. A remarkable tautomeric nature of compound (IX) is also reported.
