title: Benzo[1,2-c]1,2,5-oxadiazole N-oxide derivatives as potential antitrypanosomal drugs. Part 3: Substituents-clustering methodology in the search for new active compounds.
abstract: The results of a study on the use of Hansch's series design, cluster methodology, for the generation of new benzo[1,2-c]1,2,5-oxadiazole N-oxide derivatives as antitrypanosomal compounds are described. In vitro activity of these compounds was tested against Tulahuen 2 strain of Trypanosoma cruzi. Clearly, the Hansch methodology allowed identifying two cluster-substituents suitable for further structural modifications. The most effective drugs, derivatives 11, 18, and 21, with 50% inhibitory concentration (IC(50)) of the same order as that of the reference drug, represent an excellent structural point of chemical modifications for the design of future drugs. Preliminary results from the study of the mechanism of action of these benzofuroxans point to perturbation of the mitochondrial electron chain, inhibiting parasite respiration.
authors.affiliation: Departamento de Química Orgánica, Facultad de Química-Facultad de Ciencias, Universidad de la República, Montevideo, Uruguay.
authors.forename: Gabriela
authors.initials: G
authors.lastname: Aguirre
authors.forename: Lucía
authors.initials: L
authors.lastname: Boiani
authors.forename: Hugo
authors.initials: H
authors.lastname: Cerecetto
authors.forename: Rossanna
authors.initials: R
authors.lastname: Di Maio
authors.forename: Mercedes
authors.initials: M
authors.lastname: González
authors.forename: Williams
authors.initials: W
authors.lastname: Porcal
authors.forename: Ana
authors.initials: A
authors.lastname: Denicola
authors.forename: Matías
authors.initials: M
authors.lastname: Möller
authors.forename: Leonor
authors.initials: L
authors.lastname: Thomson
authors.forename: Verónica
authors.initials: V
authors.lastname: Tórtora
mesh_terms: D000818:Animals; D001554:Benzene / Q000737:chemistry*; D020128:Inhibitory Concentration 50; D015394:Molecular Structure; D009547:Nifurtimox / Q000494:pharmacology; D010069:Oxadiazoles / Q000737:chemistry*; D010084:Oxidation-Reduction; D010087:Oxides / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology*; D013329:Structure-Activity Relationship; D014344:Trypanocidal Agents / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology*; D014349:Trypanosoma cruzi / Q000187:drug effects
chemical_list: D010069:Oxadiazoles; D010087:Oxides; D014344:Trypanocidal Agents; D001554:Benzene; D009547:Nifurtimox