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Oswald T, Fischer M, Struckmann N, Schmidtmann M, Beckhaus R. Reaction of Pentafulvene Titanium and Zirconium Complexes with Phosphorus Ylides: Stoichiometric Reactions and Catalytic Intramolecular Proton Shuttles. Organometallics 2019. [DOI: 10.1021/acs.organomet.8b00831] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Tim Oswald
- Institut für Chemie, Carl von Ossietzky Universität Oldenburg, D-26111 Oldenburg, Federal Republic of Germany
| | - Malte Fischer
- Institut für Chemie, Carl von Ossietzky Universität Oldenburg, D-26111 Oldenburg, Federal Republic of Germany
| | - Niclas Struckmann
- Institut für Chemie, Carl von Ossietzky Universität Oldenburg, D-26111 Oldenburg, Federal Republic of Germany
| | - Marc Schmidtmann
- Institut für Chemie, Carl von Ossietzky Universität Oldenburg, D-26111 Oldenburg, Federal Republic of Germany
| | - Rüdiger Beckhaus
- Institut für Chemie, Carl von Ossietzky Universität Oldenburg, D-26111 Oldenburg, Federal Republic of Germany
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Nandanwar SK, Kim HJ. Anticancer and Antibacterial Activity of Transition Metal Complexes. ChemistrySelect 2019. [DOI: 10.1002/slct.201803073] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Sondavid K. Nandanwar
- Department of Marine Convergence ProgramPukyong National University Busan 48513 Republic of Korea
| | - Hak Jun Kim
- Department of ChemistryPukyong National University Busan 48513 Republic of Korea
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Adler C, Bekurdts A, Haase D, Saak W, Schmidtmann M, Beckhaus R. Bulky Titanium Amides: C-H Bond Activation under Mild Conditions. Eur J Inorg Chem 2014. [DOI: 10.1002/ejic.201400022] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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4
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Unravelling the versatile metal binding modes of adenine: Looking at the molecular recognition patterns of deaza- and aza-adenines in mixed ligand metal complexes. Coord Chem Rev 2013. [DOI: 10.1016/j.ccr.2013.03.029] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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5
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Zhao Y, Lin M, Chen Z, Pei H, Li Y, Chen Y, Wang X, Li L, Cao Y, Zhang Y, Li W. Titanium and zirconium amido complexes supported by imidazole-containing ligands: syntheses, characterization and catalytic activities. RSC Adv 2012. [DOI: 10.1039/c1ra00408e] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
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6
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Janssen T, Severin R, Diekmann M, Friedemann M, Haase D, Saak W, Doye S, Beckhaus R. Bis(η5:η1-pentafulvene)titanium Complexes: Catalysts for Intramolecular Alkene Hydroamination and Reagents for Selective Reactions with N−H Acidic Substrates. Organometallics 2010. [DOI: 10.1021/om100056q] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Thomas Janssen
- Institute of Pure and Applied Chemistry, Carl von Ossietzky University Oldenburg, D-26111 Oldenburg, Germany
| | - René Severin
- Institute of Pure and Applied Chemistry, Carl von Ossietzky University Oldenburg, D-26111 Oldenburg, Germany
| | - Mira Diekmann
- Institute of Pure and Applied Chemistry, Carl von Ossietzky University Oldenburg, D-26111 Oldenburg, Germany
| | - Marion Friedemann
- Institute of Pure and Applied Chemistry, Carl von Ossietzky University Oldenburg, D-26111 Oldenburg, Germany
| | - Detlev Haase
- Institute of Pure and Applied Chemistry, Carl von Ossietzky University Oldenburg, D-26111 Oldenburg, Germany
| | - Wolfgang Saak
- Institute of Pure and Applied Chemistry, Carl von Ossietzky University Oldenburg, D-26111 Oldenburg, Germany
| | - Sven Doye
- Institute of Pure and Applied Chemistry, Carl von Ossietzky University Oldenburg, D-26111 Oldenburg, Germany
| | - Rüdiger Beckhaus
- Institute of Pure and Applied Chemistry, Carl von Ossietzky University Oldenburg, D-26111 Oldenburg, Germany
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7
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Vinklárek J, Palácková H, Honzícek J, Holubová J, Holcapek M, Císarová I. Investigation of Vanadocene(IV) α-Amino Acid Complexes: Synthesis, Structure, and Behavior in Physiological Solutions, Human Plasma, and Blood. Inorg Chem 2006; 45:2156-62. [PMID: 16499378 DOI: 10.1021/ic050687u] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
This work is focused on investigating the interaction of antitumor active metallocene vanadocene dichloride (Cp2VCl2) and amino acids in aqueous solution at physiological pH. Sixteen vanadocene amino acid complexes [Cp2V(aa)][X] (aa = gly, ala, val, leu, ile, phe, his, and trp; X = Cl, PF6) were prepared and characterized on the basis of spectral measurements (EPR, MS, IR, Raman). Amino acids are coordinated to the vanadocene fragment through the oxygen atom of the carboxylic group and the nitrogen of the amino group, resulting in a five-membered chelate ring. Complexes [Cp2V(val)][PF6] and [Cp2V(ile)][PF6] have been characterized by X-ray structure analyses. It was evidenced that all prepared complexes are stable in both aqueous solutions with physiological pH and in therapeutic NaCl solutions. EPR spectra of vanadocene amino acid complexes in Krebs-Ringer solution in human blood plasma and in whole blood showed that these complexes react with the hydrogen carbonate anion present forming complex Cp2V(O2CO).
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Affiliation(s)
- Jaromír Vinklárek
- Department of General and Inorganic Chemistry, University of Pardubice, nam. Cs. legií 565, 532 10 Pardubice, Czech Republic.
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García-Terán JP, Castillo O, Luque A, García-Couceiro U, Román P, Lloret F. One-Dimensional Oxalato-Bridged Cu(II), Co(II), and Zn(II) Complexes with Purine and Adenine as Terminal Ligands. Inorg Chem 2004; 43:5761-70. [PMID: 15332829 DOI: 10.1021/ic049569h] [Citation(s) in RCA: 105] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
The reaction of nucleobases (adenine or purine) with a metallic salt in the presence of potassium oxalate in an aqueous solution yields one-dimensional complexes of formulas [M(mu-ox)(H(2)O)(pur)](n) (pur = purine, ox = oxalato ligand (2-); M = Cu(II) [1], Co(II) [2], and Zn(II) [3]), [Co(mu-ox)(H(2)O)(pur)(0.76)(ade)(0.24)](n)(4) and ([M(mu-ox)(H(2)O)(ade)].2(ade).(H(2)O))(n) (ade = adenine; M = Co(II) [5] and Zn(II) [6]). Their X-ray single-crystal structures, variable-temperature magnetic measurements, thermal behavior, and FT-IR spectroscopy are reported. The complexes 1-4 crystallize in the monoclinic space group P2(1)/a (No. 14) with similar crystallographic parameters. The compounds 5 and 6 are also isomorphous but crystallize in the triclinic space group P (No. 2). All compounds contain one-dimensional chains in which cis-[M(H(2)O)(L)](2+) units are bridged by bis-bidentate oxalato ligands with M(.)M intrachain distances in the range 5.23-5.57 A. In all cases, the metal atoms are six-coordinated by four oxalato oxygen atoms, one water molecule, and one nitrogen atom from a terminal nucleobase, building distorted octahedral MO(4)O(w)N surroundings. The purine ligand is bound to the metal atom through the most basic imidazole N9 atom in 1-4, whereas in 5 and 6 the minor groove site N3 of the adenine nucleobase is the donor atom. The crystal packing of compounds 5 and 6 shows the presence of uncoordinated adenine and water crystallization molecules. The cohesiveness of the supramolecular 3D structure of the compounds is achieved by means of an extensive network of noncovalent interactions (hydrogen bonds and pi-pi stacking interactions). Variable-temperature magnetic susceptibility measurements of the Cu(II) and Co(II) complexes in the range 2-300 K show the occurrence of antiferromagnetic intrachain interactions.
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Affiliation(s)
- Juan P García-Terán
- Departamento de Química Inorgánica, Universidad del País Vasco, Apartado 644, E-48080 Bilbao, Spain
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9
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Abstract
A series of complexes containing titanium, Ti, as a metal center has shown to possess a wide spectrum of antitumor properties. This series belongs to the non-platinum metal antitumor agents which has been developed mainly in the past 20 years. The bis(beta-diketonato)titanium(IV) and titanocene derivatives appear to offer a different alternative for cancer chemotherapy which do not follow the rationale and mechanism of action of the platinum complexes. The hydrolysis of these complexes in aqueous and pseudo aqueous solutions is discussed and the interaction studies of titanium complexes with biomolecules are also presented to unravel the mechanism of action at molecular levels.
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Affiliation(s)
- Enrique Meléndez
- Department of Chemistry, Mayagüez Campus, P.O. Box 9019, Mayaguez, Puerto Rico 00681, USA.
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11
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Fish RH. Bioorganometallic chemistry: synthesis, structure, and molecular recognition chemistry of (η5-pentamethylcyclopentadienyl)rhodium–DNA/RNA complexes in water. Coord Chem Rev 1999. [DOI: 10.1016/s0010-8545(99)00011-9] [Citation(s) in RCA: 83] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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12
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Chen H, Olmstead MM, Smith DP, Maestre MF, Fish RH. pH-abhängige Synthese und Strukturanalyse der dimeren sowie cyclischen trimeren 9-Methyl-bzw. 9-Ethylhypoxanthin-(η5 -pentamethyl-cyclopentadienyl)rhodium-Komplexe. Angew Chem Int Ed Engl 1995. [DOI: 10.1002/ange.19951071319] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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13
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Klapötke TM, Köpf H, Tornieporth-Oetting IC, White PS. Synthese und Struktur der ersten Titan(IV)-α-Aminosäure-Komplexe. Angew Chem Int Ed Engl 1994. [DOI: 10.1002/ange.19941061436] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Douglas KT, Ejim OS, Taylor K. Ferrocenopapain, an organometallic protein formed by site-specific inactivation of papain using chloroacetylferrocene. JOURNAL OF ENZYME INHIBITION 1992; 6:233-42. [PMID: 1284960 DOI: 10.3109/14756369209020173] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Papain is rapidly, specifically and irreversibly inactivated by chloroacetylferrocene in a time-dependent, two-stage process which involves initial, physical complexation between the enzyme and the organometallic reagent followed by chemical reaction. The kinetics of the process show saturation kinetics with respect to inactivator concentration. The modification occurs with a 1:1 stoichiometry and the degree of loss of enzymatic activity is directly reflected in the loss of thiol groups in the active-site that are accessible to Ellman's reagent. The modification is faster at higher pH. The ferrocenium ion of the modified papain can be generated at low pH by anaerobic treatment with ferric nitrate and shows a 180 percent increased lifetime at pH 3.3 compared to the acetylferrocenium ion under identical conditions. The spectral properties of the ferrocenopapain indicate that the ferrocene is in an unusual environment at the protein active-site and the implications of this are discussed.
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Affiliation(s)
- K T Douglas
- Department of Pharmacy, University of Manchester, UK
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15
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Köpf-Maier P. Intracellular localization of titanium within xenografted sensitive human tumors after treatment with the antitumor agent titanocene dichloride. J Struct Biol 1990; 105:35-45. [PMID: 2100149 DOI: 10.1016/1047-8477(90)90096-u] [Citation(s) in RCA: 48] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
In the present study, the intracellular localization of titanium was analyzed in three xenografted human adenocarcinomas of the colon sigmoideum (S 90), the stomach (M-Stg 4), and the lung (L 261) in dependence on the time after application of a single therapeutic dose (80 mg/kg) of the organometallic antitumor agent titanocene dichloride (C5H5)2TiCl2. The investigations were performed by use of electron energy loss spectroscopy (EELS), a method which allows microanalysis in ultrathin sections, in combination with electron spectroscopic imaging (ESI), which offers the possibility to image the two-dimensional localization and distribution of light- and medium-weight elements in animal tissues. In all three tumors which were studied, titanium was at first detected within the nucleus and, some hours and days later, it was additionally found in cytoplasmic lysosomes. In the colon and lung tumors S 90 and L 261, already 12 hr after treatment, titanium was traceable as tender granules in the nuclear chromatin. During the following days, it was then accumulated in certain areas of the nuclear heterochromatin and, in the case of the L 261 tumor, also in the nucleolus. Maximum concentrations were attained in the nuclei and nucleoli at 48 hr after substance application. Thereafter, titanium was increasingly incorporated into cytoplasmic lysosomes which are known to be involved in intracellular degrading and digesting processes and which occurred in increased numbers in treated tumor cells. Regarding the stomach carcinoma M-Stg 4, titanium was recognized in the nuclear heterochromatin only 1 and 2 days after application of titanocene dichloride. At 48 hr, it was additionally detected in cytoplasmic lysosomes. In all cases where titanium was found accumulated in the nucleus and in lysosomes, phosphorus was simultaneously enriched in a similar local distribution and a concentration which even exceeded that within phosphorus-rich areas, e.g., the nuclear heterochromatin and cytoplasmic ribosomes. These results confirm a primary interaction of titanium-containing metabolites deriving from titanocene complexes with nucleic acid molecules, especially with nuclear DNA. They suggest the formation of aggregates between nucleic acids and titanium-containing metabolites which are obviously extruded out of the nuclei and incorporated into cytoplasmic lysosomes, known to be involved in intracellular digesting processes.
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Affiliation(s)
- P Köpf-Maier
- Institut für Anatomie, Freie Universität Berlin, Germany
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16
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D�ppert K. Die Chemie der Cyclopentadienyltitan(IV)Verbindungen in w��rigem Medium. Naturwissenschaften 1990. [DOI: 10.1007/bf01131789] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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17
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The Antitumor Activity of Transition and Main-Group Metal Cyclopentadienyl Complexes. ACTA ACUST UNITED AC 1989. [DOI: 10.1007/978-3-642-74760-1_7] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023]
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Köpf-Maier P, Martin R. Subcellular distribution of titanium in the liver after treatment with the antitumor agent titanocene dichloride. A study using electron spectroscopic imaging. VIRCHOWS ARCHIV. B, CELL PATHOLOGY INCLUDING MOLECULAR PATHOLOGY 1989; 57:213-22. [PMID: 2569781 DOI: 10.1007/bf02899084] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
In the present study, the subcellular distribution of titanium in the liver of mice was determined 24 and 48 h after application of a therapeutic (ED100; ED = effective dose) and a toxic (LD25; LD = lethal dose) dose (60 and 80 mg/kg, respectively) of the antitumor agent titanocene dichloride by electron spectroscopic imaging at the ultrastructural level. At 24 h, titanium was mainly accumulated in the cytoplasm of endothelial and Kupffer cells, lining the hepatic sinusoids. Titanium was detected in the nucleoli and the euchromatin of liver cells, packaged as granules together with phosphorus and oxygen. One day later titanium was still present in cytoplasmic inclusions within endothelial and Kupffer cells, whereas in hepatocyte nucleoli only a few deposits of titanium were observed at 48 h. At this time titanium was mainly accumulated in the form of highly condensed granules in the euchromatin and the perinucleolar heterochromatin. It was found in the cytoplasm of liver cells, incorporated into cytoplasmic inclusion bodies which probably represent lysosomes. Sometimes these inclusions were situated near bile canaliculi and occasionally extruded their content into the lumen of bile capillaries. This observation suggests a mainly biliary elimination of titanium-containing metabolites. These results confirm electron spectroscopic imaging to be an appropriate method for determining the subcellular distribution of light and medium-weight elements within biological tissues. Insights into the cellular mode of action of titanocene complexes or titanocene metabolites can be deduced from the findings of the present study.
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Affiliation(s)
- P Köpf-Maier
- Institut für Anatomie, Freie Universität Berlin, Federal Republic of Germany
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Köpf-Maier P, Köpf H. Tumorhemmende Cyclopentadienylmetall-Komplexe: experimentelle Untersuchungen zur Überprüfung der Cyclopentadien-Hypothese. J Organomet Chem 1988. [DOI: 10.1016/s0022-328x(00)99454-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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20
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Pneumatikakis G, Yannopoulos A, Markopoulos J. Interactions of dichloro-bis(η5-cyclopentadienyl)titanium(IV) with nucleosides. Inorganica Chim Acta 1988. [DOI: 10.1016/s0020-1693(00)91892-9] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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21
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Köpf-Maier P, Köpf H. Transition and main-group metal cyclopentadienyl complexes: Preclinical studies on a series of antitumor agents of different structural type. STRUCTURE AND BONDING 1988. [DOI: 10.1007/3-540-50130-4_3] [Citation(s) in RCA: 162] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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22
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Cozak D, Melnik M. Titanium organometallic compounds: analysis and classification of crystallographic data. Coord Chem Rev 1986. [DOI: 10.1016/0010-8545(86)85002-0] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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23
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Chelation involving carbonyl groups in an oxourine: structure of a 3:1 titanocene:xanthine complex. Inorganica Chim Acta 1986. [DOI: 10.1016/s0020-1693(00)83286-7] [Citation(s) in RCA: 23] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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24
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Kationische komplexe mit der (η5-C5H5)2TiIV-baugruppe: Darstellung und struktur von [(η5-C5H5)2Ti(bipy)]2+ (CF2SO3−)2 und [(η5-C5H5)2Ti(phen)]2+(CF3SO3−)2. J Organomet Chem 1986. [DOI: 10.1016/0022-328x(86)80082-1] [Citation(s) in RCA: 32] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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25
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Singh B. Structural characterization of monocyclopentadienyltitanium (IV) bis(methyl-2-amino-1-cyclopentenedithiocarboxylate)chloride. CRYSTAL RESEARCH AND TECHNOLOGY 1985. [DOI: 10.1002/crat.2170201121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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26
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Cardin CJ, Roy A. Anticancer activity of organometallic compounds. 1. Synthesis and spectroscopic characterisation of cyclopentadienyltitanium amino/amido acid complexes. Inorganica Chim Acta 1985. [DOI: 10.1016/s0020-1693(00)82291-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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