title: Half-sandwich Ru II[9]aneS3 complexes structurally similar to antitumor-active organometallic piano-stool compounds: preparation, structural characterization and in vitro cytotoxic activity.
abstract: The preparation, structural characterization, and chemical behavior in aqueous solution of a series of new Ru[9]aneS3 half-sandwich complexes of the type [Ru([9]aneS3)Cl(NN)][CF3SO3] and [Ru([9]aneS3)(dmso-S)(N-N)][CF3SO3]2 (5-15, NN=substituted bpy or 2x1-methylimidazole) are described. The X-ray structures of [Ru([9]aneS3)Cl(3,3'-H2dcbpy)][CF3SO3] (9) (3,3'-H2dcbpy=3,3'-dicarboxy-2,2'-bipyridine), [Ru([9]aneS3)Cl(4,4'-dmobpy)][CF3SO3] (13) (4,4'-dmobpy=4,4'-dimethoxy-2,2'-bipyridine), and [Ru([9]aneS3)Cl(1-MeIm)2][CF3SO3] (15) (1-MeIm=1-methylimidazole) were also determined. The new compounds are structurally similar to anticancer-active organometallic half-sandwich complexes of formula [Ru(eta6-arene)Cl(NN)][PF6]. Three chloro compounds (5, 9, 15) were tested in vitro for cytotoxic activity against two human cancer cell lines in comparison with the previously described [Ru([9]aneS3)Cl(en)][CF3SO3] (1, en=ethylenediamine), [Ru([9]aneS3)Cl(bpy)][CF3SO3] (2), and with their common dmso precursor [Ru([9]aneS3)Cl(dmso-S)2][CF3SO3] (3). Only the ethylenediamine complex 1 showed some antiproliferative activity, ca. one order of magnitude lower than the reference organometallic half-sandwich compound RM175 that contains biphenyl instead of [9]aneS3. This compound was further tested against a panel of human cancer cell lines (including one resistant to cisplatin).
authors.affiliation: Dipartimento di Scienze Chimiche, Università di Trieste, Via L Giorgieri 1, 34127 Trieste, Italy.
authors.forename: Ioannis
authors.initials: I
authors.lastname: Bratsos
authors.forename: Stephanie
authors.initials: S
authors.lastname: Jedner
authors.forename: Alberta
authors.initials: A
authors.lastname: Bergamo
authors.forename: Gianni
authors.initials: G
authors.lastname: Sava
authors.forename: Teresa
authors.initials: T
authors.lastname: Gianferrara
authors.forename: Ennio
authors.initials: E
authors.lastname: Zangrando
authors.forename: Enzo
authors.initials: E
authors.lastname: Alessio
mesh_terms: D000473:Alkanes / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology; D000970:Antineoplastic Agents / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology*; D045744:Cell Line, Tumor; D049109:Cell Proliferation / Q000187:drug effects; D018360:Crystallography, X-Ray; D006801:Humans; D008958:Models, Molecular; D019906:Nuclear Magnetic Resonance, Biomolecular; D009942:Organometallic Compounds / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology; D012428:Ruthenium / Q000737:chemistry*; D013457:Sulfur Compounds / Q000138:chemical synthesis / Q000737:chemistry* / Q000494:pharmacology
chemical_list: D000473:Alkanes; D000970:Antineoplastic Agents; D009942:Organometallic Compounds; D013457:Sulfur Compounds; C421311:trithiacyclononane; D012428:Ruthenium