Unusual coordinating behavior by three non-steroidal anti-inflammatory drugs from the oxicam family towards copper(II). Synthesis, X-ray structure for copper(II)-isoxicam, -meloxicam and -cinnoxicam-derivative complexes, and cytotoxic activity for a copper(II)-piroxicam complex
Cini, R., Tamasi, G., Defazio, S. and Hursthouse, M.B. (2007) Unusual coordinating behavior by three non-steroidal anti-inflammatory drugs from the oxicam family towards copper(II). Synthesis, X-ray structure for copper(II)-isoxicam, -meloxicam and -cinnoxicam-derivative complexes, and cytotoxic activity for a copper(II)-piroxicam complex. Journal of Inorganic Biochemistry, 101, (8), 1140-1152. (doi:10.1016/j.jinorgbio.2007.04.015).
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Cytotoxic tests recently performed at National Cancer Institute, NCI (USA), on [Cu(HPIR)2(DMF)2], 1, (H2PIR = piroxicam, 4-hydroxy-2-methyl-N-pyridin-2-yl-2H-1,2-benzothiazine-3-carboxamide 1,1-dioxide) a widely used non-steroidal anti-inflammatory drug, NSAID [see R. Cini, G. Giorgi, A. Cinquantini, C. Rossi, M. Sabat, Inorg. Chem. 29 (1990) 5197–5200, for synthesis and structural characterization, DMF = dimethylformamide] (NSC #624662) by using a panel of ca. 50 human cancer cells, showed growth inhibition factor GI50 values as low as 20 μM against several cancer lines, with an average value 54.4 μM. The activity of 1 is larger against ovarian cancer cells, non-small lung cancer cells, melanoma cancer cells, and central nervous system cancer cells. The widely used anticancer drug carboplatin (cis-diammine(1,1-cyclobutanedicarboxylato)platinum(II)) (NSC #241240) has average GI50 value of 102 μM. The reactions of copper(II)–acetate with other NSAIDs from the oxicam family were tested and crystalline complexes were obtained and characterized. Isoxicam (H2ISO = 4-hydroxy-2-methyl-N-(5-methylisoxazol-3-yl)-2H-1,2-benzothiazine-3-carboxamide 1,1-dioxide) produced [Cu(HISO)2] · 0.5DMF, 2 · 0.5DMF (DMF = dimethylfomamide). The coordination arrangement is square-planar and the HISO− anions behave as ambi-dentate chelators via O(amide),N(isoxazole) and O(enolate),O(amide) donors. Meloxicam (H2MEL = 4-hydroxy-2-methyl-N-(5-methyl-1,3-thiazol-2-yl)-2H-1,2-benzothiazine-3-carboxamide 1,1-dioxide) produced [Cu(HMEL)2(DMF)] · 0.25H2O, 3 · 0.25H2O. The coordination arrangement is square-pyramidal, the equatorial donors being O(amide),N(thiazole) from two HMEL− anions and the apical donor being O(DMF). Unexpectedly, cinnoxicam (HCIN = 2-methyl-1,1-dioxido-3-[(pyridin-2-ylamino)carbonyl]-2H-1,2-benzothiazin-4-yl-(3-phenylacrylate)) produced [Cu(MBT)2(PPA)2] (MBT = 3-(methoxycarbonyl)-2-methyl-2H-1,2-benzothiazin-4-olate 1,1-dioxide, PPA = 3-phenyl-N-pyridin-2-ylacrylamide).
|Keywords:||thiosemicarbazones, piroxicam, oxicam, crystal-structure, n-(2-pyridyl)-3-phenyl-2-propene, cytotoxic activity, nickel(ii), molecular-structure, indomethacin, anti-inflammatory drugs, cobalt(ii), diffraction, x-ray structures, amide, non-steroidal, metal-complexes,cu complexes,|
Q Science > QD Chemistry
|Divisions:||University Structure - Pre August 2011 > School of Chemistry
|Date Deposited:||31 Jul 2008|
|Last Modified:||01 Jun 2011 07:06|
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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