title: Synthesis and anxiolytic activity of 1-phenyl-2-(4-aryl-1,3,4,5-tetrahydropyrido[2,3-b][1 ,4]diazepin-2-ylidene)-ethanone.
abstract: A two-step, general synthesis of 1-phenyl-2-(4-aryl-1,3,4,5-tetrahydropyrido[2,3-b][1,4]diazepin-2-ylidene)-ethanones 3-9 is presented. This synthesis employs a condensation of 2,3-diaminopyridine with benzoylacetone followed by a basic-activated cyclization reaction with substituted benzaldehydes for final closure of the seven-membered ring. Molecular diversity is fixed by appropriate aldehydes: 2-chloro-, 4-chloro-, 2-bromo-, 4-bromo-, 4-fluoro-, 4-trifluoro- and 3-bromo-4,5-dimethoxybenzaldehyde. Compounds 4, 6, 8, 9 and 10 were examined for their anxiolytic activity. The most active was the compound with the chlorophenyl substituent i.e. 1-phenyl-2-{4-(4-chlorophenyl)-1,3,4,5-tetrahydropyrido[2,3-b][1,4]diazepin-2-ylidene}-ethanone (4).
authors.affiliation: Department of Drugs Technology, Wroclaw Medical University, Poland. hanna@bf.uni.wroc.pl
authors.forename: H
authors.initials: H
authors.lastname: Liszkiewicz
authors.forename: M W
authors.initials: MW
authors.lastname: Kowalska
authors.forename: M
authors.initials: M
authors.lastname: Rutkowska
authors.forename: H
authors.initials: H
authors.lastname: Gliniak
mesh_terms: D000818:Animals; D014151:Anti-Anxiety Agents / Q000138:chemical synthesis* / Q000494:pharmacology* / Q000633:toxicity; D001007:Anxiety / Q000523:psychology; D001381:Azepines / Q000138:chemical synthesis* / Q000494:pharmacology* / Q000633:toxicity; D001522:Behavior, Animal / Q000187:drug effects; D009682:Magnetic Resonance Spectroscopy; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C
chemical_list: C512632:1-phenyl-2-(4-aryl-1,3,4,5-tetrahydropyrido(2,3-b)(1,4)diazepin-2-ylidene)ethanone; D014151:Anti-Anxiety Agents; D001381:Azepines