alexa Synthesis and in vitro evaluation of new ethyl and methyl quinoxaline-7-carboxylate 1,4-di-N-oxide against Entamoeba histolytica.
Pharmaceutical Sciences

Pharmaceutical Sciences

Biochemistry & Pharmacology: Open Access

Author(s): DuqueMontao BE, GmezCaro LC, SanchezSanchez M, Monge A, HernndezBaltazar E,

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Abstract In our search for new antiamoebic agents, a new series of ethyl and methyl quinoxaline-7-carboxylate 1,4-di-N-oxide derivatives have been synthesized using the Beirut reaction. All compounds were characterized by spectroscopic techniques and elemental analysis. Antiamoebic activity was evaluated in vitro against Entamoeba histolytica strain HM1:IMSS by the microdilution method, and the structure-activity relationship was analyzed. We found that eleven quinoxaline derivatives showed greater activity than metronidazole and nitazoxanide with IC₅₀ values in the range 1.99-0.35 μM. Compounds T-001 and T-016 shows IC₅₀ values of 1.41 and 1.47 μM, respectively, with a value of selectivity index >60. Copyright © 2013 Elsevier Ltd. All rights reserved. This article was published in Bioorg Med Chem and referenced in Biochemistry & Pharmacology: Open Access

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