Cytotoxicity of ruthenium(II) piano-stool complexes with imidazole-based PN ligands
作者:Wilhelm Huber、Philip Bröhler、Wim Wätjen、Walter Frank、Bernhard Spingler、Peter C. Kunz
DOI:10.1016/j.jorganchem.2012.06.027
日期:2012.10
A series of p-cymene ruthenium(II) complexes with imidazol-2-yl phosphines as PN ligands was prepared. Depending on the number of imidazolyl substituents in the ligands Ph3-nP(im)(n) 1-3: n = 1-3, im imidazol-2-yl (a), 1-methylimidazol-2-yl (b)} different coordination modes were observed: kappa P, kappa N-2,N or kappa N-3,N,N. The complexes were tested for their cytotoxicity in different cancer cell lines. Most of the compounds were found to be non-toxic; The compounds [(p-cymene)Ru(1a)Cl-2] (4a) shows cytotoxicity towards A2780sens and Hct116 cells in the mM range but not in H4IIE cells. The cytotoxicity is decreased upon introduction of a methyl group as [(p-cymene)Ru(1b)Cl-2] (4b) shows only modest toxicities in the cell lines investigated. The kappa P compound [(p-cymene)Ru(2a)Cl-2] (5a) shows selective toxicity in H4IIE cells after 72 h whereas the kappa N-2, N compound [(p-cymene)Ru(2a) Cl] OTf (5a') showed no toxicity in the cell lines investigated which again. (C) 2012 Elsevier B. V. All rights reserved.
Ruthenium Arene Derivatives with PN Hemilabile Ligands. P−C Cleavage and Phosphine to Phosphinite Transformation
作者:Agustín Caballero、Félix A. Jalón、Blanca R. Manzano、Gustavo Espino、Mercedes Pérez-Manrique、Antonio Mucientes、Francisco J. Poblete、Miguel Maestro
DOI:10.1021/om049438o
日期:2004.11.1
formula [RuCl2(arene)(κ1-dpim)] (dpim = 2-(diphenylphosphino)-1-methylimidazole) (arene = p-cymene, 1a; C6H6, 1b) were prepared by the reaction of [RuCl2(p-cymene)]2 or [RuCl2(C6H6)(CH3CN)] with dpim. Complexes 1a and 1b were structurally characterized by NMR spectroscopy and X-ray diffraction. The reaction of these precursors with BF4- salts led, in dichloromethane, to cationic complexes of formula [Ru
Experimental and Computational Evidence for the Participation of Nonclassical Dihydrogen Species in Proton Transfer Processes on Ru–Arene Complexes with Uncoordinated N Centers. Efficient Catalytic Deuterium Labeling of H<sub>2</sub>with CD<sub>3</sub>OD
作者:Gustavo Espino、Agustín Caballero、Blanca R. Manzano、Lucía Santos、Mercedes Pérez-Manrique、Miquel Moreno、Félix A. Jalón
DOI:10.1021/om300015j
日期:2012.4.23
2-pyridyl) that contain uncoordinated N atoms has been analyzed experimentally by NMR spectroscopy and through computational studies. Initially, at low temperature, the uncoordinated N atoms of the phosphine are protonated and a proton–hydride exchange is observed by 1H NMR spectroscopy. The proton transfer leads to the corresponding cationic trihydride intermediates, which exhibit a dual character of classical
[RuH 2(arene)(PPh 2 Het)]衍生物(PPh 2 Het = dpim,Het = 2- N-甲基咪唑基; PPh 2 Het = PPh )的布朗斯台德酸HB(HBF 4和CF 3 CO 2 H)的质子化2 py,Het = 2-吡啶基)中含有未配位的N原子,已通过NMR光谱和计算研究进行了实验分析。最初,在低温下,磷化氢的未配位N原子被质子化,并且观察到质子-氢化物交换为11 H NMR光谱。质子转移导致相应的阳离子三氢化物中间体,该中间体表现出经典氢化物和非经典氢化物的双重特征,非经典物质更稳定,尤其是当Het = 2-吡啶基时。事实上,H的释放2和相应的单氢化物复合物的形成[期RuH(芳烃)(κ 2 - Ñ,P -PPh 2的Het)]在室温下观察到B中。不协调的N中心参与质子传递过程中RuH(H 2)+相对于RuH 3 +的稳定化讨论了氢化物的种类以及氢化物与