Synthesis, biological, and theoretical evaluations of new 1,2,3-triazoles against the hemolytic profile of the Lachesis muta snake venom
作者:Vinícius R. Campos、Paula A. Abreu、Helena C. Castro、Carlos R. Rodrigues、Alessandro K. Jordão、Vitor F. Ferreira、Maria C.B.V. de Souza、Fernanda da C. Santos、Laura A. Moura、Thaisa S. Domingos、Carla Carvalho、Eládio F. Sanchez、André L. Fuly、Anna C. Cunha
DOI:10.1016/j.bmc.2009.09.031
日期:2009.11
The current treatment used against envenomation by Lachesis muta venom still presents several side effects. This paper describes the synthesis, pharmacological and theoretical evaluations of new 1-aryl-sulfonylamino-5-methyl-1H-[1,2,3]-triazole-4-carboxylic acid ethyl esters (8a-f) tested against the hemolytic profile of the L. muta snake venom. Their structures were elucidated by one-and two-dimensional NMR techniques (H-1, APT, HETCOR (1)J(CH) and (n)J(CH), n = 2, 3) and high-resolution electrospray ionization mass spectrometry. The series of triazole derivatives significantly neutralized the hemolysis induced by L. muta crude venom presenting a dose-dependent inhibitory profile (IC50 = 30-83 mu M) with 1-(4'-chlorophenylsulfonylamino)-5-methyl-1H-[1,2,3]-triazole-4-carboxylic acid ethyl ester (8e) being the most potent compound. The theoretical evaluation revealed the correlation of the antiophidian profile with the coefficient distribution and density map of the Highest Occupied Molecular Orbitals (HOMO) of these molecules. The elucidation of this new series may help on designing new and more efficient antiophidian molecules. (C) 2009 Elsevier Ltd. All rights reserved.
Crystal Structure and 1H NMR Experimental and Theoretical Study of Conformers of 5-Methyl-1-(4’-methylphenylsulfonylamino)-1H-[1,2,3]-triazole-4-carboxylic Acid Ethyl Ester and 5-Methyl-1-(phenylsulfonylamino)-1H-[1,2,3]-triazole-4-carboxylic Acid Ethyl Ester
作者:Maria Freitas、Vinicius Campos、Jackson Resende、Marcos da Silva、Vitor Ferreira、Anna Claudia Cunha、José Carneiro、Mateus Lage、Leonardo de Souza、Haroldo Silva、Wagner de Almeida
DOI:10.21577/0103-5053.20190249
日期:——
properties, such as antiviral, antimicrobial and antileishmaniasis. We reported molecular/supramolecular X-ray structures of antiophidian compounds I and II. For I and II there are two crystallographic different molecules in the unit cell (A and B). To explore the causes of the similarities in the compound’s crystalstructures, intermolecular interactions were explored using the Hirshfeld surface as the