Synthesis, characterisation and biological properties of gold(iii) compounds with modified bipyridine and bipyridylamine ligands
作者:Angela Casini、Mariam Celine Diawara、Rosario Scopelliti、Shaik Mohammed Zakeeruddin、Michael Grätzel、Paul J. Dyson
DOI:10.1039/b921019a
日期:——
Square planar gold(III) complexes that contain functionalised bipyridine ligands of general formula [Au(N⁁N)Cl2][PF6] [where N⁁N = 2,2′-bipyridine, 4,4′-dimethyl-2,2′-bipyridine, 4,4′-dimethoxy-2,2′-bipyridine and 4,4′-diamino-2,2′-bipyridine] have been prepared and characterised by NMR spectroscopy and mass spectrometry. Two of the complexes have also been characterised in the solid state by X-ray crystallography. In addition, a gold(III) compound bearing a dipyridin-2-ylamine ligand was also prepared and characterised. The complexes were found to undergo hydrolysis under pseudo-physiological conditions. Moreover, the complexes showed moderate to good cytotoxicity in vitro towards the A2780 human ovarian carcinoma cell line and the cisplatin resistant variant A2780cisR. Reactivity studies with biomolecules, such as reducing agents, plasmid DNA and a model protein (ubiquitin) were also performed to provide tentative insights into the mode of action of the complexes.
含有通式[Au(N⁁N)Cl2][PF6][其中 N⁁N = 2,2′-联吡啶、4,4′-二甲基-2、2,2′-联吡啶、4,4′-二甲氧基-2,2′-联吡啶和 4,4′-二氨基-2,2′-联吡啶],并通过核磁共振光谱和质谱进行了表征。其中两个配合物还通过 X 射线晶体学对其固态进行了表征。此外,还制备了一种含有二吡啶-2-胺配体的金(III)化合物,并对其进行了表征。研究发现,这些配合物在假生理条件下会发生水解。此外,这些复合物在体外对 A2780 人类卵巢癌细胞系和顺铂抗性变体 A2780cisR 显示出中等至良好的细胞毒性。此外,还进行了与还原剂、质粒 DNA 和模型蛋白质(泛素)等生物大分子的反应研究,以初步了解复合物的作用模式。