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Synthesis, study of antileishmanial and antitrypanosomal activity of imidazo pyridine fused triazole analogues

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Adinarayana Nandikolla, Singireddi Srinivasarao, Banoth Karan Kumar, Sankaranarayanan Murugesan, Himanshu Aggarwal, Louise L. Major, Terry K. Smith, Kondapalli Venkata Gowri Chandra Sekhar

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Abstract

Four groups, thirty-five compounds in total, of novel 1,2,3-triazole analogues of imidazo-[1,2-a]-pyridine-3-carboxamides were designed and synthesized using substituted pyridine, propargyl bromide, 2-azidoethyl 4-methyl benzenesulfonate and substituted acetylenes. These compounds were characterized using 1H NMR, 13C NMR, LCMS and elemental analyses and a crystal structure was obtained for one of the significantly active compounds, 8f. All the synthesized and characterized compounds were screened in vitro for antileishmanial and antitrypanosomal activity against Leishmania major and Trypanosoma brucei parasites, respectively. Among the tested analogues, fivecompounds (8d, 8f, 8j, 10b and 10d) exhibited significant antileishmanial activity while three compounds (10b, 11a and 11b) showed substantial activity against T. brucei parasite. In silico ADME prediction studies depicted that the essential compounds obeyed Lipinski's rule of five. The predicted in silico toxicity profile suggested that the tested compounds would be non-toxic, which was confirmed experimentally by the lack of cytotoxicity against HeLa cells. Finally, a molecular docking study was also performed, for 10d the most active antileishmanial compound, to study its putative binding pattern at the active site of the selected leishmanial trypanothione reductase target.

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Original languageEnglish
Pages (from-to)38328-38343
Number of pages16
JournalRSC Advances
Volume10
Issue number63
DOIs
Publication statusPublished - 19 Oct 2020

    Research areas

  • BIOLOGICAL EVALUATION, MEDICINAL ATTRIBUTES, 1,2,3-TRIAZOLES, DERIVATIVES, ACID, INHIBITORS

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