Diazabicycloalkanes with nitrogen atoms in the nodal positions. 3. The benzo[b]-1,4-diazabicyclo [2.2.2]-octene system

Benzob]-1,4-diazabicyclo2.2.2]octene and 4′-methylbenzo1′,2′-b]-1,4-diazabicyclo2.2.2]octene were synthesized by the reaction of N-acetyl-6-H- and 6-methyl-1,2,3,4-tetrahydroquinoxalines with ethylene oxide and subsequent cyclization of the N-(β-hydroxyethyl)-N'-acetyl derivatives in refluxing HBr. The errors of the published data on the benzob]-1,4-diazabicyclo2.2.2]octene system are demonstrated. See 1] for communication 2. Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 6, pp. 827–830.