Bibliografías temáticas / Titanocenos

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Literatura académica sobre el tema "Titanocenos"

Autor: Grafiati
Publicado: 4 de junio de 2021
Última modificación: 15 de febrero de 2022

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Artículos de revistas sobre el tema "Titanocenos"

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Pereira, Brasilio C. A., Stanlei I. Klein, and Marcos L. Dias. "Efeitos estéricos e eletrônicos de substituintes alquilas em catalisadores titanocênicos solúveis na polimerização sindioespecífica de estireno." Polímeros 9, no. 4 (1999): 110–15. http://dx.doi.org/10.1590/s0104-14281999000400019.

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Titanocenos são catalisadores solúveis conhecidos para a polimerisação estereoespecífica de olefinas pró-quirais como o estireno. Nesse trabalho descrevemos as relações entre as características do poliestireno e a estrutura do precursor do catalisador, de fato aqueles da família (RCp)2TiCl2 (R = H, etila, iso-propila, n-propila, sec-butila, n-butila, iso-amila e ciclohexila). Todos os catalisadores são ativos para a produção de poliestireno acima de zero graus centígrados. A sindiotaticidade dos polímeros são dependentes da cadeia lateral dos anéis aromáticos do titanoceno e da temperatura da
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PEREIRA, Brasílio Carvalho de Araújo, Stanlei Ivair KLEIN, and Marcos Lopes DIAS. "Catálise estereoespecífica de estireno por titanocenos alquil-substituídos do tipo (RCp)2TiCl2." Eclética Química 25 (2000): 97–108. http://dx.doi.org/10.1590/s0100-46702000000100009.

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Uma série de sete complexos alquil substituídos do tipo (RCp)2TiCl2 (R= H, etila, n-propila, iso-propila, n-butila, iso-amila, ciclo-hexila) foi preparada juntamente com o ainda inédito contendo R= sec-butila, e o efeito do substituinte na polimerização do estireno foi investigada à temperaturas de polimerização de 0 e 50 ºC. Foi encontrado que R = n-butila maximiza a produção de poliestireno sindiotático. Ligantes alquilas com R = RCH2- são superiores aos R = RR’CH- e ao precursor Cp2TiCl2 na produção de poliestireno sindiotático de alto peso molecular.
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Gansäuer, Andreas, Andreas Okkel, Lukas Schwach, Laura Wagner, Anja Selig, and Aram Prokop. "Triazol-substituted titanocenes by strain-driven 1,3-dipolar cycloadditions." Beilstein Journal of Organic Chemistry 10 (July 17, 2014): 1630–37. http://dx.doi.org/10.3762/bjoc.10.169.

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An operationally simple, convenient, and mild strategy for the synthesis of triazole-substituted titanocenes via strain-driven 1,3-dipolar cycloadditions between azide-functionalized titanocenes and cyclooctyne has been developed. It features the first synthesis of titanocenes containing azide groups. These compounds constitute ‘second-generation’ functionalized titanocene building blocks for further synthetic elaboration. Our synthesis is modular and large numbers of the complexes can in principle be prepared in short periods of time. Some of the triazole-substituted titanocenes display high
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Hogan, Megan, James Claffey, Eoin Fitzpatrick, Thomas Hickey, Clara Pampillón, and Matthias Tacke. "Synthesis and Cytotoxicity Studies of Titanocene C Analogues." Metal-Based Drugs 2008 (September 30, 2008): 1–7. http://dx.doi.org/10.1155/2008/754358.

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From the carbolithiation of 6-N,N-dimethylamino fulvene (3) and 2,4[bis(N,N-dimethylamino)methyl]-N-methylpyrrolyl lithium (2a), N-(N′,N′-dimethylaminomethyl)benzimidazolyl lithium (2b)' or p-(N,N-dimethylamino)methylphenyl lithium (2c), the corresponding lithium cyclopentadienide intermediate (4a–c) was formed. These three lithiated intermediates underwent a transmetallation reaction with TiCl4' resulting in N,N-dimethylamino-functionalised titanocenes 5a–c. When these titanocenes were tested against a pig kidney epithelial cell line (LLC-PK), the IC50 values obtained were of 23, and 52 μM fo
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PEREIRA, Brasílio Carvalho de Araújo, and Stanlei Ivair KLEIN. "Fatores que influenciam na atividade de titanocenos em catálise homogênea de polimerização de estireno." Eclética Química 25 (2000): 199–212. http://dx.doi.org/10.1590/s0100-46702000000100016.

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É apresentada uma revisão bibliográfica com 42 referências abordando aspectos históricos dos compostos organometálicos de titânio, sua aplicação em sistemas catalíticos utilizando metalocenos de titânio e os fatores que influenciam a catálise de alfa-olefinas com as conseqüentes repercussões nas estruturas dos polímeros.
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Selig, Anja, Laura Wagner, Iris Winkler, Thorsten Lauterbach, Andreas Gansaeuer, and Aram Prokop. "Carbonyl-Substituted Titanocenes as New Cytostatic Agents Against Lymphoma and Leukemia in Childhood." Blood 110, no. 11 (2007): 4208. http://dx.doi.org/10.1182/blood.v110.11.4208.4208.

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Abstract Acute lymphoblastic leukemia (ALL) is the most common malignant disease in childhood. Despite a relatively good prognosis approximately one fourth of the patients suffers from relapse and, consequently, a worse prognosis. Only 40% of these children with relapsed ALL will survive. Patients who fail to achieve a complete remission in chemotherapy do not survive. This explains the need for new compounds that may overcome resistance against clinically employed cytostatic drugs. In the present study we examined novel titan-containing agents concerning their cytotoxic potential with great s
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Deally, Anthony, Frauke Hackenberg, Grainne Lally, and Matthias Tacke. "Synthesis and Biological Evaluation of Achiral Indole-Substituted Titanocene Dichloride Derivatives." International Journal of Medicinal Chemistry 2012 (June 12, 2012): 1–13. http://dx.doi.org/10.1155/2012/905981.

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Six new titanocene compounds have been isolated and characterised. These compounds were synthesised from their fulvene precursors using Super Hydride (LiBEt3H) followed by transmetallation with titanium tetrachloride to yield the corresponding titanocene dichloride derivatives. These complexes are bis-[((1-methyl-3-diethylaminomethyl)indol-2-yl)methylcyclopentadienyl] titanium (IV) dichloride (5a), bis-[((5-methoxy-1-methyl,3-diethylaminomethyl)indol-2-yl)methylcyclopentadienyl] titanium (IV) dichloride (5b), bis-[((1-methyl,3-diethylaminomethyl)indol-4-yl)methylcyclopentadienyl] titanium (IV)
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Gao, Li Ming, and Enrique Meléndez. "Cytotoxic Properties of Titanocenyl Amides on Breast Cancer Cell Line MCF-7." Metal-Based Drugs 2010 (May 4, 2010): 1–6. http://dx.doi.org/10.1155/2010/286298.

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A new titanocenyl amide containing flavone as pendant group has been synthesized by reaction of titanocenyl carboxylic acid chloride and 7-Aminoflavone and structurally characterized by spectroscopic methods. This species and eight previously synthesized titanocenyl amide complexes have been tested in breast adenocarcinoma cancer cell line, MCF-7. The functionalization of titanocene dichloride with amides enhances the cytotoxic activity in MCF-7. Two sets of titanocenyl amides can be identified, with IC50<100 μM and IC50>100 μM. The most cytotoxic species is Cp(CpCO-NH-C6H4-(CH2)2CH3)TiC
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Horáček, Michal, Jan Merna, Róbert Gyepes, Jan Sýkora, Jiří Kubišta, and Jiří Pinkas. "Titanocene and ansa-titanocene complexes bearing 2,6-bis(isopropyl)phenoxide ligand(s). Syntheses, characterization and use in catalytic dehydrocoupling polymerization of phenylsilane." Collection of Czechoslovak Chemical Communications 76, no. 1 (2011): 75–94. http://dx.doi.org/10.1135/cccc2010133.

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Aryloxychloro and bis(aryloxy) titanocenes of general formula L2TiCl2–x(OAr′)x where L = η5-C5H5 (x = 1 (1) and 2 (2)), L2 = SiMe2(η5-C5H4)2 (x = 1 (3) and 2 (4)), and Ar′ = 2,6-(CHMe2)2C6H3 were prepared by the reaction of corresponding titanocene dichloride with LiOAr′ and characterized by spectroscopic methods and compound 3 by single crystal X-ray diffraction analysis. The bulky aryloxy ligand in 1 and 3 exerts a hindered rotation around the Ti–O bond on the 1H NMR time scale, resulting in its dynamic behavior in CDCl3 solution. Variable temperature NMR measurements proved the rotation bar
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Bousrez, G., I. Déchamps, J. L. Vasse, and F. Jaroschik. "Reduction of titanocene dichloride with dysprosium: access to a stable titanocene(ii) equivalent for phosphite-free Takeda carbonyl olefination." Dalton Transactions 44, no. 20 (2015): 9359–62. http://dx.doi.org/10.1039/c4dt03979c.

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Tesis sobre el tema "Titanocenos"

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Santos, Hugo Felix Lima dos. "Estudo te?rico QTAIM e DFT dos compostos de coordena??o: efeito quelato, titanocenos e liga??o qu?mica." Universidade Federal do Rio Grande do Norte, 2012. http://repositorio.ufrn.br:8080/jspui/handle/123456789/17689.

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Made available in DSpace on 2014-12-17T15:42:03Z (GMT). No. of bitstreams: 1 HugoFLS_DISSERT.pdf: 2820205 bytes, checksum: ad87619352b0e479d50e7f9093be5ec0 (MD5) Previous issue date: 2012-10-15<br>This work is a study of coordination compounds by quantum theory of atoms in molecules (QTAIM), based on the topological analysis of the electron density of molecular systems, both theoretically and experimentally obtained. The coordination chemistry topics which were studied are the chelate effect, bent titanocene and chemical bond in coordination complexes. The chelate effect was investigated acc
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Valadares, Marize Campos. "Avaliação de alguns aspectos da resposta imune tipo celular em animais portadores do tumor ascitico de Ehrlich e tratados com titanocenos." [s.n.], 2002. http://repositorio.unicamp.br/jspui/handle/REPOSIP/311294.

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Orientador : Mary Luci de Souza Queiroz<br>Tese (doutorado) - Universidade Estadual de Campinas, Faculdade de Ciencias Medicas<br>Made available in DSpace on 2018-08-01T16:36:52Z (GMT). No. of bitstreams: 1 Valadares_MarizeCampos_D.pdf: 1218609 bytes, checksum: 217724b78283c81f36fd717fc91a9735 (MD5) Previous issue date: 2002<br>Resumo: Neste trabalho, dando prosseguimento a estudos prévios realizados em nosso laboratório investigamos os efeitos do composto diciclopentadienildiclorotitânio IV, DDCT, (15 mg/kg/dia/ dois dias) sobre a capacidade funcional das células ¿natural killer¿ (NK) e a p
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Shu, Ronghua 1962. "Some novel organosilane reactions catalyzed by titanocenes." Thesis, McGill University, 1998. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=35941.

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This thesis presents some novel organosilane reactions catalyzed by titanocenes.<br>Heterodehydrocoupling between silanes and phosphines has been accomplished with titanocenes, as catalysts. The reaction has the characteristics of high yield and high selectivity and can be carried out under mild conditions. Monophosphinosilanes and diphosphinosilanes can be selectively obtained from the reactions of secondary phosphines andsilanes. Primary phosphines react with primary silanes to produce 1,3,5-triphospha-2,4,6-trisilacyclohexanes. A two-catalytic-cycled mechanism is proposed with titanocene hy
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Shu, Ronghua. "Some novel organosilane reactions catalyzed by titanocenes." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape7/PQDD_0022/NQ50260.pdf.

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Beagley, Paul. "Ansa-titanocenes for enantioselective reduction of C=X bonds." Thesis, University of Sheffield, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.557602.

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Xin, Shixuan. "Some catalytic and stoichiometric reactions of titanocene and chiral ansa-titanocene derivatives with silanes and siloxanes." Thesis, McGill University, 1995. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=39898.

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Several types of catalytic and stoichiometric reactions of titanocenes and chiral ansa-titanocenes were studied.<br>Dimethyltitanocene (DMT) and rac- (EBTHI) TiMe$ sb2$ (EBTHI = ethylene-1,2-bis (4,5,6,7-tetrahydro-1-indenyl)) are effective catalyst precursors for hydrosilation of a variety of ketones when using in conjunction with secondary silanes. A catalyst generated by in situ reaction of enantiomerically pure S- (EBTHI) TiX$ sb2$ (X = Cl, 1/2(S-1,1$ sp prime$-binaphthyl-2,2$ sp prime$-diolate)) with MeLi catalyzes hydrosilation of dialkyl ketones to give, after hydrolysis, the enantioenr
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Boyles, John Ronald. "Antiproliferative activity of some polar substituted titanocene dichlorides." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/mq22278.pdf.

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Brink, Susanna. "Structure-activity relationships of titanocene complexes with antitumor properties." Pretoria : [s.n.], 2003. http://upetd.up.ac.za/thesis/available/etd-09052005-101713/.

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Cini, Melchior. "Synthesis and biological evaluation of enantiopure substituted titanocene complexes." Thesis, University of Nottingham, 2015. http://eprints.nottingham.ac.uk/30485/.

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Tolerated by normal tissues, implementation of anti-cancer therapies based on titanium compounds is limited by low efficacy/selectivity, lack of understanding of their mode(s) of action and access to the most active chiral variants. This thesis reports the synthesis, characterization and biological evaluation of a novel class of chiral substituted titanocenes from novel chiral cyclopentadienyl ligands, themselves accessible from substituted pentafulvenes. After an introductory chapter, the second chapter describes the synthesis and biological evaluation of substituted (rac/meso)-mixtures of Ti
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Bell, Jane Louise. "The synthesis and applications of chiral, group IV metallocenes." Thesis, University of Southampton, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.336625.

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Libros sobre el tema "Titanocenos"

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National Toxicology Program (U.S.). NTP technical report on the toxicology and carcinogenesis studies of titanocene dichloride (CAS no. 1271-19-8) in F344/N rats (gavage studies). U.S. Dept. of Health and Human Services, Public Health Service, National Institutes of Health, 1991.

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Capítulos de libros sobre el tema "Titanocenos"

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Pardasani, R. T., and P. Pardasani. "Magnetic properties of titanocene hydride." In Magnetic Properties of Paramagnetic Compounds. Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-662-54228-6_5.

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Li, Shi, and Tamotsu Takahashi. "Aromatic Ring Construction from Zirconocenes and Titanocenes." In Transition-Metal-Mediated Aromatic Ring Construction. John Wiley & Sons, Inc., 2013. http://dx.doi.org/10.1002/9781118629871.ch11.

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Pardasani, R. T., and P. Pardasani. "Magnetic properties of titanocene anionic dihydride." In Magnetic Properties of Paramagnetic Compounds. Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-662-54228-6_6.

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Pardasani, R. T., and P. Pardasani. "Magnetic properties of dimeric titanocene oxide." In Magnetic Properties of Paramagnetic Compounds. Springer Berlin Heidelberg, 2017. http://dx.doi.org/10.1007/978-3-662-54228-6_7.

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Kaminsky, Walter, and Volker Scholz. "New Half-Sandwich Titanocenes for the Polymerization of Butadiene." In Organometallic Catalysts and Olefin Polymerization. Springer Berlin Heidelberg, 2001. http://dx.doi.org/10.1007/978-3-642-59465-6_30.

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Beckhaus, Rüdiger. "Methylidenetitanacyclobutane vs. Titanocene-Vinylidene — Versatile Building Blocks." In Organic Synthesis via Organometallics (OSM 4). Vieweg+Teubner Verlag, 1993. http://dx.doi.org/10.1007/978-3-322-84062-2_10.

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Hogan, Megan, and Matthias Tacke. "Titanocenes: Cytotoxic and Anti-angiogenic Chemotherapy Against Advanced Renal-Cell Cancer." In Topics in Organometallic Chemistry. Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-13185-1_5.

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Köpf-Maier, P. "Organometallic Titanocene and Ferricenium Complexes: Antitumor and Toxicologic Properties." In Platinum and Other Metal Coordination Compounds in Cancer Chemotherapy. Springer US, 1988. http://dx.doi.org/10.1007/978-1-4613-1717-3_66.

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Bastaki, M., E. Missirlis, J. C. Murray, and M. E. Maragoudakis. "Effects of Titanocene Dichloride on Endothelial Cells in Vitro." In Vascular Endothelium. Springer US, 1996. http://dx.doi.org/10.1007/978-1-4613-0355-8_18.

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Zambelli, Adolfo, Alfonso Grassi, and Pasquale Longo. "Styrene and Conjugated Dienes Polymerization with Half Sandwich Titanocene Catalysts." In Metalorganic Catalysts for Synthesis and Polymerization. Springer Berlin Heidelberg, 1999. http://dx.doi.org/10.1007/978-3-642-60178-1_49.

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Actas de conferencias sobre el tema "Titanocenos"

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Lattanzi, Alessandra, Antonio Proto, and Arrigo Scettri. "Titanocenes Catalyzed Diastereoselective Epoxidation of Allylic Alcohols." In The 3rd International Electronic Conference on Synthetic Organic Chemistry. MDPI, 1999. http://dx.doi.org/10.3390/ecsoc-3-01747.

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Liu, Ying, Yifan Hong, Fenglan Fan, Jinliang Zang, and Xiaodi Tan. "Volume holographic recording in bis(2,6-difluoro-3-(1-hydropyrrol-1-yl)phenyl)titanocene-doped PMMA photopolymer (Conference Presentation)." In Practical Holography XXXI: Materials and Applications, edited by Hans I. Bjelkhagen and V. Michael Bove. SPIE, 2017. http://dx.doi.org/10.1117/12.2252389.

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