15Nov 2019

LIPOPHILIC AND STRUCTURE ACTIVITY RELATIONSHIPS STUDY OF THIOSEMICARBAZONES AND DERIVATIVES

  • Laboratoire de Chimie Organique Physique et de Synthese (LaCOPS), Departement de Chimie, Faculte des Sciences et Techniques (FAST), Universite d Abomey-Calavi, 01 BP 4521 Cotonou, Benin
  • Laboratoire de Chimie Organique Pharmaceutique, Ecole de Pharmacie, Faculte des Sciences de la Sante, Universite d Abomey - Calavi, Campus du Champ de Foire, 01 BP 188, Cotonou, Benin
  • Louvain Drug Research Institute (LDRI), School of Pharmacy, Universite Catholique de Louvain, B1 7203 Avenue Emmanuel Mounier 72, B-1200 Brussels, Belgique
  • Department of Biology and Center for Computational and Integrative Biology, Rutgers University, Camden, NJ 08102, USA
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Traditionally, small molecules have been a reliable source for discovering novel biologically active compounds because these molecules are easily synthesized and their smooth structural optimization would usually lead to a feasible candidate compound. Here, some thiosemicarbazones, N(4)-methyl and N(4)-phenyl-3-thiosemicarbazones were synthesized in good yield (52-84%), characterized and then their anti-parasitic activity were evaluated. The structure and lipophilic-activity relationships of compounds were particularly studied. Among them, some products exhibited trypanocidal activity with their half inhibitory concentration (IC50 ? 10 micromolar ??M?) especially compounds L1-3, D2, B3, C3, D1 (from 2 to 8.73 ?M). Other showed moderate antitrypanosomal activity with their IC50 between 12 to 87 ?M (L4, C2, C1, B2) while certain showed little activity (IC50 ? 100?M). Some active products turned out quick selective on the parasite with their selectivity index greater than to unit (SI ? 1). Several factors including lipophilicity, steric and electronic effects of the substituents have played a vital role in this activity. The elongation of the carbon chain of the carbonyl, the substitution on a phenyl radical, the fixing of a methyl or phenyl on the N(4) nitrogen atom induced significantly the increased trypanocidal activity of compounds. This is the case specifically of N(4)-methyl and especially of N(4)-phenyl-substituted thiosemicarbazones. Such compounds could be able to have applications in the treatment of parasitic diseases


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[Glinma Bienvenu, Medegan Sedami, Yayi Eleonore, Agnimonhan F. Hyacinthe, Kpoviessi D.S. Salome, Quetin-leclercq Joelle, Accrombessi C. Georges, Kotchoni O. Simeon, Poupaert H. Jacques and Gbaguidi A. Fernand (2019); LIPOPHILIC AND STRUCTURE ACTIVITY RELATIONSHIPS STUDY OF THIOSEMICARBAZONES AND DERIVATIVES Int. J. of Adv. Res. 7 (11). 29-40] (ISSN 2320-5407). www.journalijar.com


GLINMA Bienvenu
Laboratoire de Chimie Organique Physique et de Synthèse, Faculté des Sciences et Techniques, Faculté des Sciences et Techniques, Faculté des Sciences et Techniques, Université d\'Abomey-Calavi, BENIN

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