Taking advantage of the facile and versatile synthetic properties of âclickâ 1,2,3-triazolylidene N-heterocyclic carbenes (tzNHC's), a range of new organometallic Ru(II) and Os(II) arene complexes containing functionalised tzNHC ligands, [M(η6-p-cymene)(tzNHC)Cl2] [M = Ru(II), Os(II)], have been synthesised and fully characterised, including the X-ray crystal structure of one of the Os(II) complexes. The tzNHC ligands remain coordinated to the metal centres under relevant physiological conditions, and following binding to the model protein, ubiquitin. The in vitro cytotoxicity of the compounds towards human ovarian cancer cells is dependent on the substituent on the tzNHC ligand but is generally <50 μM and in some cases <1 μM, whilst still retaining a high degree of selectivity towards cancer cells over healthy cells (1.85 μM in A2780 ovarian cancer cells versus 435 μM in human embryonic kidney cells in one case).
                                    利用“点击”1,2,3-
噻唑烯N-杂环卡宾(tzNHC)的合成特性,我们合成了一系列新型有机
金属Ru(II)和Os(II)
芳烃配合物,这些配合物含有功能化的tzNHC
配体,[M(η6-p-
香叶醇)(tzNHC)Cl2] [M = Ru(II), Os(II)],并进行了全面表征,包括其中一个Os(II)配合物的X射线晶体结构。tzNHC
配体在相关生理条件下持续与
金属中心配位,并在与模型蛋白泛素结合后保持这一状态。这些化合物对人类卵巢癌细胞的体外细胞毒性取决于tzNHC
配体上的取代基,通常低于50 μM,在某些情况下甚至低于1 μM,同时对癌细胞相对于健康细胞保持了较高的选择性(在一种情况下,A2780卵巢癌细胞中的毒性为1.85 μM,而人类胚胎肾细胞中的毒性为435 μM)。