title: Synthesis and pharmacological evaluation of novel heterotricyclic acylhydrazone derivatives, designed as PAF antagonists.
abstract: This paper describes the synthesis and the antiplatelet properties of new heterotricyclic N-acylhydrazone derivatives (7a-e), structurally analogous to known hetrazepinic PAF antagonists, exploring molecular hybridization as a tool for molecular designing. The synthetic route employed to access compounds (7a-e) used, as starting material, the previously described methyl 3-hydroxy-8-methyl-6-phenyl-6H-pyrazolo[3,4-b]thieno[2, 3-d]pyridine-2-carboxylate derivative. The results from inhibitory effects of these novel acylhydrazone derivatives (7a-e) upon PAF-induced platelet aggregation, indicated that all compounds present a significant antithrombotic profile.
authors.affiliation: Laboratório de Avaliação e Síntese de Substâncias Bioativas (LASSBio), Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, P.O. Box 68006, 21944-970, RJ, Rio de Janeiro, Brazil. cmfraga@pharma.ufrj.br
authors.forename: A G
authors.initials: AG
authors.lastname: Fraga
authors.forename: C R
authors.initials: CR
authors.lastname: Rodrigues
authors.forename: A L
authors.initials: AL
authors.lastname: de Miranda
authors.forename: E J
authors.initials: EJ
authors.lastname: Barreiro
authors.forename: C A
authors.initials: CA
authors.lastname: Fraga
mesh_terms: D000818:Animals; D001381:Azepines / Q000737:chemistry / Q000494:pharmacology; D008958:Models, Molecular; D010972:Platelet Activating Factor / Q000037:antagonists & inhibitors*; D010975:Platelet Aggregation Inhibitors / Q000737:chemistry* / Q000494:pharmacology*; D011817:Rabbits; D014230:Triazoles / Q000737:chemistry / Q000494:pharmacology
chemical_list: D001381:Azepines; D010972:Platelet Activating Factor; D010975:Platelet Aggregation Inhibitors; D014230:Triazoles; C063964:bepafant