title: Synthesis of substituted 1,4-diazepines and 1,5-benzodiazepines using an efficient heteropolyacid-catalyzed procedure.
abstract: An efficient and improved procedure for the synthesis of 1,4-diazepine and 1,5-benzodiazepine derivatives via the reaction of ketimine intermediates with aldehydes in the presence of Keggin-type heteropolyacids (HPAs) was developed. High yields and short reaction times were obtained for both electron-releasing and electron-withdrawing substituted 1,4-diazepine  and 1,5-benzodiazepines derivatives.
authors.affiliation: Laboratory of Applied Organic Chemistry, Houari Boumediene University of Sciences and Technology, BP 31, El-Alia, Bab-Ezzouar, 16111 Algiers, Algeria.
authors.forename: Rachedine
authors.initials: R
authors.lastname: Kaoua
authors.forename: Norah
authors.initials: N
authors.lastname: Bennamane
authors.forename: Saliha
authors.initials: S
authors.lastname: Bakhta
authors.forename: Sihame
authors.initials: S
authors.lastname: Benadji
authors.forename: Cherifa
authors.initials: C
authors.lastname: Rabia
authors.forename: Bellara
authors.initials: B
authors.lastname: Nedjar-Kolli
mesh_terms: D000143:Acids / Q000737:chemistry*; D001381:Azepines / Q000138:chemical synthesis* / Q000737:chemistry; D002384:Catalysis
chemical_list: D000143:Acids; D001381:Azepines