Abstract 5, 5-Dicyano-and 5-cyano-5-ethoxycarbonyl-5, 6-dihydro-3, 7-diphenyl-4H-1, 2- diazepines were prepared by the condensation of α-bromoacetophenone azine with malononitrile and ethyl cyanoacetate in the presence of sodium ethoxide, respectively. Halogenations of the dihydrodiazepines gave pyridazines, diazanorcaradienes, 4, 4, 6, 6- tetrachlorodihydrodiazepines, and/or a 4-chloropyrazole whose relative yields strongly ...
