The 1,4-disubstituted 1,2,3-triazole ligand prepared by click chemistry 1-(2-picolyl)-4-phenyl-1H-1,2,3-triazole (ppt) was investigated as novel chelating ligand for Ru(II) complexes with potential antitumor activity. The preparation and structural characterization, mainly by NMR spectroscopy in solution and by X-Ray crystallography in the solid state, of four new Ru(II) complexes is reported: two isomeric Ru-dmso compounds, trans,cis-[RuCl2(dmso-S)2(ppt)] (1) and cis,cis-[RuCl2(dmso-S)2(ppt)] (2), and two half-sandwich Ru-[9]aneS3 coordination compounds, [Ru([9]aneS3)(dmso-S)(ppt)][CF3SO3]2 (3) and [Ru([9]aneS3)Cl(ppt)][CF3SO3] (4). In all compounds ppt firmly binds to ruthenium in a bidentate fashion through the pyridyl nitrogen atom and the triazole N2, thus forming a puckered six-membered ring. The chemical behavior in aqueous solution of the water-soluble complexes 3 and 4 was studied by UV-Vis and NMR spectroscopy and compared to that of the previously described organometallic analogue [Ru(η6-p-cymene)Cl(ppt)][Cl] (5) in view of their potential antitumor activity. Compounds 3–5 were tested also in vitro for cytotoxic activity against two human cancer cell lines, one sensitive and one resistant to cisplatin, in comparison with cisplatin. Compound 4, the one that aquates faster, was found to be more cytotoxic than cisplatin against human lung squamose carcinoma cell line (A-549).
通过点击
化学合成的1,4-二取代的
1,2,3-三唑配体1-(2-
吡啶基)-4-苯基-
1H-1,2,3-三唑(ppt)被研究作为具有潜在抗肿瘤活性的
钌(II)络合物的新型螯合
配体。报告了四种新
钌(II)络合物的制备和结构表征,主要通过溶液中的NMR光谱和固态中的X射线晶体学:两个异构体
钌-二甲基亚
硫酰(dmso)化合物,trans,cis-[RuCl2(dmso-S)2(ppt)](1)和cis,cis-[RuCl2(dmso-S)2(ppt)](2),以及两个半夹心
钌-[9]aneS3配位化合物,[Ru([9]aneS3)(dmso-S)(ppt)][CF3SO3]2(3)和[Ru([9]aneS3)Cl(ppt)][CF3SO3](4)。在所有化合物中,ppt通过
吡啶氮原子和三唑N2以双齿方式牢固结合于
钌,从而形成一个扭曲的六元环。对
水溶性络合物3和4的
水中
化学行为进行了UV-Vis和NMR光谱研究,并与先前描述的有机
金属类比物[Ru(η6-p-车烯)Cl(ppt)][Cl](5)进行了比较,以评估其潜在的抗肿瘤活性。化合物3-5还在体外针对两种人类癌
细胞系进行细胞毒性活性测试,一种对
顺铂敏感,另一种对
顺铂耐药。化合物4是
水合速度较快的,被发现对人类肺鳞状细胞癌
细胞系(A-549)的细胞毒性比
顺铂更强。