3-Ferrocenylamido-5-methylpyrazole: synthesis and metal coordination
摘要:
The new pyrazole-derived ferrocene ligand 3-ferroceneamido-5-methylpyrazole (3-Fc-AMP, 2) was synthesized from 3-amino-5-methylpyrazole and ferrocenecarboxylic acid. The ligand associates in the solid state into one-dimensional H-bonded polymeric chains and forms N,O-chelating metal complexes of Zn, Cd, Ni and Co, having ML2 and ML3 stoichiometries. Their electrochemical properties and the X-ray crystal structures of two Cd and Ni complexes are reported. (c) 2004 Elsevier B.V. All rights reserved.
3-Ferrocenylamido-5-methylpyrazole: synthesis and metal coordination
摘要:
The new pyrazole-derived ferrocene ligand 3-ferroceneamido-5-methylpyrazole (3-Fc-AMP, 2) was synthesized from 3-amino-5-methylpyrazole and ferrocenecarboxylic acid. The ligand associates in the solid state into one-dimensional H-bonded polymeric chains and forms N,O-chelating metal complexes of Zn, Cd, Ni and Co, having ML2 and ML3 stoichiometries. Their electrochemical properties and the X-ray crystal structures of two Cd and Ni complexes are reported. (c) 2004 Elsevier B.V. All rights reserved.
The redox-active ferrocenoyl modified pyrazole ligand (3-Fc-AMP) readily coordinates to a variety of transition metal ions. Here, we describe our findings regarding the synthesis and structural characterization of iron and cobalt complexes of Fc-AMP, and the cytotoxicity profiles of these chemicals in vitro. Using the human mammary adenocarcinoma MCF-7 cell line we show that the free ligand and three metal complexes induced cytotoxicity with calculated LC(50)s ranging from 45.8 to 73.2 mu M. The toxicity of the complexes decreased as the redox potential increased. The present study demonstrates the potential chemotherapeutic promise of metal complexes of a redox-active ferrocenoyl modified pyrazole ligand on human cancer cells. (c) 2005 Elsevier B.V. All rights reserved.