Journal
EUROPEAN JOURNAL OF MEDICINAL CHEMISTRY
Volume 43, Issue 9, Pages 1903-1910Publisher
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
DOI: 10.1016/j.ejmech.2007.11.024
Keywords
Quinoxaline; N-Oxide; Beirut reaction; Antiplasmodial; Malaria; Plasmodium falciparum
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Funding
- Ministerio de Educacion y Ciencia [AP2003-2175]
- University of Navarra
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As a continuation of our research and with the aim of obtaining new antimalarial agents, new series of 3-phenylquinoxaline 1,4-di-N-oxide derivatives have been synthesized following the classical Beirut reaction. Antiplasmodial activity was evaluated in vitro against Plasmodium falciparum by the incorporation of [H-3]-hypoxanthine. Cytotoxicity was tested in KB cells by AlamarBlue assay. Twenty-one of the 60 compounds that were assayed against 3D7 (CQ-sensitive) showed enough activity to be also evaluated against K1 (CQ-resistant) strain. Ten of them were shown to be more active than chloroquine in the resistant strain. The most interesting compounds are 7-(methyl or methoxy)-3-(4'-fluoro or chloro)phenylquinoxaline-2-carbonitrile 1,4-di-N-oxides because of their low IC50 and their high SI shown for the K1 strain, making them valid new leads. (C) 2007 Elsevier Masson SAS. All rights reserved.
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