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Piperamides and their derivatives as potential anti-trypanosomal agents

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Abstract

We describe herein an evaluation of the trypanocidal effect of eight piperamides (18) isolated from Piper tuberculatum bearing dihydropyridone, piperidine, and isobutyl moieties against epimastigote forms of Trypanosoma cruzi, the causative agent of Chagas’ disease. Based on such results, three hydrogenated and two hydrolyzed derivatives (1014) were prepared and evaluated as well. The dihydropyridone amides (13) displayed higher anti-trypanosomal activity. The (Z)-piplartine (1) showed higher activity with a 50% inhibition concentration (IC50) value of 10.5 μM, almost four times more potent than the positive control, benznidazole (IC50 = 42.7 μM), and should be further evaluated as a suitable hit for the design of new antiprotozoal agents.

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Acknowledgements

This work was funded by grants provided by FAPESP (03/11524-9) and also supported within the BIOTA/FAPESP—Biodiversity Virtual Institute Program (www.biota.org.br). M.F., M.J.K., and V.S.B. are grateful to CNPq for research fellowships. F.C. (07/56140-4) and L.O.R. (03/00886-7) wish to thank FAPESP for providing scholarships.

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Correspondence to Maysa Furlan.

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Cotinguiba, F., Regasini, L.O., da Silva Bolzani, V. et al. Piperamides and their derivatives as potential anti-trypanosomal agents. Med Chem Res 18, 703–711 (2009). https://doi.org/10.1007/s00044-008-9161-9

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  • DOI: https://doi.org/10.1007/s00044-008-9161-9

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