RuII(η6-arene) complexes, especially with bioactive ligands, are considered to be very promising compounds for anticancer drug design. We have shown recently that RuII(η6-p-cymene) complexes with 3-hydroxyflavone ligands exhibit very high in vitro cytotoxic activities correlating with a strong inhibition of topoisomerase IIα. In order to expand our knowledge about the structureâactivity relationships and to determine the impact of lipophilicity of the arene ligand and of the hydrolysis rate on anticancer activity, a series of novel 3-hydroxyflavone derived RuII(η6-arene) complexes were synthesised. Furthermore, the impact of the heteroatom in the bioactive ligand backbone was studied by comparing the cytotoxic activity of RuII(η6-p-cymene) complexes of 3-hydroxyquinolinone ligands with that of their 3-hydroxyflavone analogues. To better understand the behaviour of these RuII complexes in aqueous solution, the stability constants and pKa values for complexes and the corresponding ligands were determined. Furthermore, the interaction with the DNA model 5â²-GMP and with a series of amino acids was studied in order to identify potential biological target structures.
RuII(η6-
芳烃)配合物,尤其是具有
生物活性
配体的配合物,被认为是抗癌药物设计中非常有前景的化合物。我们最近已显示,RuII(η6-p-
松油烃)配合物与
3-羟基黄酮配体表现出非常高的体外细胞毒性活动,这与对拓扑异构酶IIα的强抑制作用相关。为了拓展我们关于结构-活性关系的知识,并确定
芳烃配体的亲脂性和
水解速率对抗癌活性的影响,我们合成了一系列新型的以
3-羟基黄酮为基础的RuII(η6-
芳烃)配合物。此外,通过比较RuII(η6-p-
松油烃)配合物与
3-羟基喹啉酮
配体和其3-羟基黄
酮类似物的细胞毒性活性,研究了
生物活性
配体骨架中杂原子的影响。为了更好地理解这些RuII配合物在
水溶液中的行为,确定了配合物及其相应
配体的稳定性常数和pKa值。此外,还研究了与DNA模型5′-GMP和一系列
氨基酸的相互作用,以识别潜在的
生物靶标结构。