(11aS)-7-Bromo-235101111a-hexa­hydro-1H-pyrrolo­21-c14benzodiazepine-311-dione

摘要

The title compound, C12H11BrN2O2, was prepared by an intra-cyclization reaction of (S)-1-(5-bromo-2-nitro­benz­yl)-5-oxopyrrolidine-2-carb­oxy­lic acid methyl ester in the presence of EtOH/Fe. The five-membered pyrrolidinone ring adopts an approximate envelope conformation, while the seven-membered diazepanone ring displays a twisted boat conformation. Inter­molecular classical N—H⋯O hydrogen bonds and weak C—H⋯O inter­actions help to stabilize the crystal structure.