A series of cationic metalla-cycles of the general formulae [(η6-p-cym)4Ru4(OO∩OO)2(N∩N)2]4+ and [(η6-p-cym)4Ru4(NO∩NO)2(N∩N)2]4+ has been prepared from the dinuclear arene ruthenium precursors [(η6-p-cym)2Ru2(OO∩OO)2Cl2] (OO∩OO = oxalato, 1,4-benzoquinonato-2,5-diolato, 1,4-naphtoquinonato-5,8-diolato, 9,10-anthraquinonato-1,4-diolato, 5,12-tetraquinonato-6,11-diolato) and [(η6-p-cym)2Ru2(NO∩NO)2Cl2] (NO∩NO = oxamido, oxonico) by reaction with two different bidentate linkers (N∩N = 1,2-bis(4-pyridyl)ethylene, 1,2-bis(4-pyridyl)ethane) in the presence of silver triflate. All complexes were isolated as triflate salts and characterised by NMR, infrared, UV-visible, mass spectrometry and by elemental analysis. The cytotoxicities of the tetranuclear ruthenium complexes have been established using ovarian A2780 and A2780cisR cancer cell lines. All complexes exhibit moderate to excellent activity on both the cisplatin resistant and cisplatin sensitive cells, thus suggesting a mode of action different from cisplatin.
一系列通式为[(η6-p- cym)4Ru4(OO∩OO)2(N∩N)2]4+ 和[(η6-p- cym)4Ru4(NO∩NO)2(N∩N)2]4+ 的阳离子
金属环已从二核
芴钌前体中制备出来。cym)4Ru4(NO∩NO)2(N∩N)2]4+和[(η6-p-cym)4Ru4(OO∩OO)2(N∩N)2]4+是由双核
芴钌前体[(η6-p-cym)2Ru2(OO∩OO)2Cl2](OO∩OO =
草酸、1,4-苯醌-2,5
-二醇、1、4-
萘醌-5,8
-二醇、9,10-
蒽醌-1,4
-二醇、5,12-四
喹啉-6,11
-二醇)和[(η6-p-ym)2Ru2(NO∩NO)2Cl2](NO∩NO = 氧
氨基、N∩N=1,2-双(4-
吡啶基)
乙烯、
1,2-双(4-吡啶基)乙烷)与两种不同的双齿连接体在三
氟化银存在下反应生成。所有络合物都以三酸盐的形式分离出来,并通过核磁共振、红外、紫外-可见、质谱和元素分析进行了表征。利用卵巢 A2780 和 A2780cisR 癌
细胞系确定了四核
钌配合物的细胞毒性。所有复合物对
顺铂耐药细胞和
顺铂敏感细胞都表现出中等到卓越的活性,从而表明其作用模式与
顺铂不同。