Synthesis and characterization of copper(II) complexes of pyridine-2-carboxamidrazones as potent antimalarial agents

Gokhale, Nikhil H.; Padhye, Subhash B.; Billington, David C.; Rathbone, Daniel L.; Croft, Simon L.; Kendrick, Howard D.; Anson, Christopher E. and Powell, Annie K. (2003). Synthesis and characterization of copper(II) complexes of pyridine-2-carboxamidrazones as potent antimalarial agents. Inorganica Chimica Acta, 349 , pp. 23-29.

Abstract

Copper(II) complexes of some pyridine-2-carboxamidrazones have been prepared and characterized. The crystal structures of the copper complex cis-[dichloro(N1-2-acetylthiophene-pyridine-2-carboxamidrazone) copper(II)] 8a and one of the free ligands, viz. {(p-chloro-2-thioloxy-benzylidine-pyridine-2-carboxamidrazone)} 6, have been determined. The former shows a highly distorted square planar geometry around copper, with weak intermolecular coordination from the thiophenyl sulfur resulting in a stacking arrangement in the crystal lattice. The in vitro activities of the synthesized compounds against the malarial parasite Plasmodium falciparum are reported for the first time, which clearly shows the advantage of copper complexation and the requirement of four coordinate geometry around copper as some of the key structural features for designing such metal-based antimalarials. © 2003 Elsevier Science B.V. All rights reserved.

Publication DOI: https://doi.org/10.1016/S0020-1693(03)00047-1
Divisions: Life & Health Sciences > Pharmacy
Life & Health Sciences
Life & Health Sciences > Health Sciences
Related URLs:
Uncontrolled Keywords: antimalarial,carboxamidrazones,copper,plasmodium falciparum,Biochemistry,Inorganic Chemistry,Physical and Theoretical Chemistry,Materials Chemistry
Published Date: 2003-06-05

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