title: Synthesis, characterization, and in vitro evaluation of novel ruthenium(II) eta6-arene imidazole complexes.
abstract: Ten complexes of general formula [Ru(eta6-arene)Cl2(L)], [Ru(eta6-arene)Cl(L)2][X], and [Ru(eta6-arene)(L)3][X]2 (eta6-arene = benzene, p-cymene; L = imidazole, benzimidazole, N-methylimidazole, N-butylimidazole, N-vinylimidazole, N-benzoylimidazole; X = Cl, BF4, BPh4) have been prepared and characterized by spectroscopy. The structures of five representative compounds have been established in the solid state by single-crystal X-ray diffraction. All the new compounds were assessed by the same in vitro screening assays applied to [imidazole-H][trans-RuCl4(DMSO)(imidazole)] (NAMI-A) and [Ru(eta6-arene)Cl2(1,3,5-triaza-7-phosphaadamantane)] (RAPTA) compounds. It was found that the new compounds show essentially the same order of cytotoxicity as the RAPTA compounds toward cancer cells. Several of the compounds were selective toward cancer cells in that they were less (or not) cytotoxic toward nontumorigenic cells that are used to model healthy human cells. Thus, two of the compounds, [Ru(eta6-p-cymene)Cl(vinylimid)2][Cl] (vinylimid = N-vinylimidazole) and [Ru(eta6-benzene)(mimid)3][BF4]2 (mimid = N-methylimidazole), have been selected for a more detailed in vivo evaluation.
authors.affiliation: Institut des Sciences et Ingénierie Chimiques, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland.
authors.forename: Carsten A
authors.initials: CA
authors.lastname: Vock
authors.forename: Claudine
authors.initials: C
authors.lastname: Scolaro
authors.forename: Andrew D
authors.initials: AD
authors.lastname: Phillips
authors.forename: Rosario
authors.initials: R
authors.lastname: Scopelliti
authors.forename: Gianni
authors.initials: G
authors.lastname: Sava
authors.forename: Paul J
authors.initials: PJ
authors.lastname: Dyson
mesh_terms: D000818:Animals; D000970:Antineoplastic Agents / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D018360:Crystallography, X-Ray; D000081007:Cymenes; D004354:Drug Screening Assays, Antitumor; D006801:Humans; D007093:Imidazoles / Q000737:chemistry*; D051379:Mice; D015394:Molecular Structure; D009942:Organometallic Compounds / Q000138:chemical synthesis* / Q000737:chemistry / Q000494:pharmacology; D012428:Ruthenium; D013329:Structure-Activity Relationship
chemical_list: C514066:(eta6-benzene)tris(N-methylimidazole)ruthenium(II); D000970:Antineoplastic Agents; D000081007:Cymenes; D007093:Imidazoles; D009942:Organometallic Compounds; C514065:chloro(eta6-4-cymene)bis(N-vinylimidazole)ruthenium(II); D012428:Ruthenium