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Добірка наукової літератури з теми "Indenylidenes"

Автор: Grafiati

Опубліковано: 3 червня 2025

Оновлено: 31 липня 2025

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Статті в журналах з теми "Indenylidenes"

Voccia, Maria, Steven P. Nolan, Luigi Cavallo, and Albert Poater. "The activity of indenylidene derivatives in olefin metathesis catalysts." Beilstein Journal of Organic Chemistry 14 (November 30, 2018): 2956–63. http://dx.doi.org/10.3762/bjoc.14.275.

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Анотація:

The first turnover event of an olefin metathesis reaction using a new family of homogenous Ru-based catalysts bearing modified indenylidene ligands has been investigated, using methoxyethylene as a substrate. The study is carried out by means of density functional theory (DFT). The indenylidene ligands are decorated with ortho-methyl and isopropyl groups at both ortho positions of their phenyl ring. DFT results highlight the more sterically demanding indenylidenes have to undergo a more exothermic first phosphine dissociation step. Overall, the study emphasises advantages of increased steric h

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Gawin, Rafał, Anna Kozakiewicz, Piotr A. Guńka, Paweł Dąbrowski, and Krzysztof Skowerski. "Bis(Cyclic Alkyl Amino Carbene) Ruthenium Complexes: A Versatile, Highly Efficient Tool for Olefin Metathesis." ANGEWANDTE CHEMIE INTERNATIONAL EDITION 56, no. 4 (2017): 981–86. https://doi.org/10.1002/anie.201612373.

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Abstract: The state-of-the-art in olefin metathesis is application of N-heterocyclic carbene (NHC)-containing ruthenium alkylidenes for the formation of internal C=C bonds and of cyclic alkyl amino carbene (CAAC)-containing ruthenium benzylidenes in the production of terminal olefins. A straightforward synthesis of bis(CAAC)Ru indenylidene complexes, which are highly effective in the formation of both terminal and internal C=C bonds at loadings as low as 1ppm, is now reported.

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Miao, Xiaowei, Johan Bidange, Pierre H. Dixneuf, et al. "Ruthenium-Benzylidenes and Ruthenium-Indenylidenes as Efficient Catalysts for the Hydrogenation of Aliphatic Nitriles into Primary Amines." ChemCatChem 4, no. 12 (2012): 1911–16. http://dx.doi.org/10.1002/cctc.201200511.

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Yu, Baoyi, Zhixiong Luo, Fatma B. Hamad, Karen Leus, Kristof van Hecke, and Francis Verpoort. "Effect of the bulkiness of indenylidene moieties on the catalytic initiation and efficiency of second-generation ruthenium-based olefin metathesis catalysts." Catalysis Science & Technology 6, no. 7 (2016): 2092–100. http://dx.doi.org/10.1039/c5cy01506e.

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Schmid, Thibault E., Florian Modicom, Adrien Dumas, et al. "Latent ruthenium–indenylidene catalysts bearing a N-heterocyclic carbene and a bidentate picolinate ligand." Beilstein Journal of Organic Chemistry 11 (September 3, 2015): 1541–46. http://dx.doi.org/10.3762/bjoc.11.169.

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Анотація:

A silver-free methodology was developed for the synthesis of unprecedented N-heterocyclic carbene ruthenium indenylidene complexes bearing a bidentate picolinate ligand. The highly stable (SIPr)(picolinate)RuCl(indenylidene) complex 4a (SIPr = 1,3-bis(2-6-diisopropylphenyl)imidazolidin-2-ylidene) demonstrated excellent latent behaviour in ring closing metathesis (RCM) reaction and could be activated in the presence of a Brønsted acid. The versatility of the catalyst 4a was subsequently demonstrated in RCM, cross-metathesis (CM) and enyne metathesis reactions.

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Dragutan, By Valerian, Ileana Dragutan, and Francis Verpoort. "Ruthenium Indenylidene Complexes." Platinum Metals Review 49, no. 1 (2005): 33–40. http://dx.doi.org/10.1595/147106705x24580.

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Smoleń, Michał, Wioletta Kośnik, Rafał Loska, et al. "Synthesis and catalytic activity of ruthenium indenylidene complexes bearing unsymmetrical NHC containing a heteroaromatic moiety." RSC Advances 6, no. 80 (2016): 77013–19. http://dx.doi.org/10.1039/c6ra18210k.

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Capparelli, M. V., R. Machado, Y. De Sanctis, and A. J. Arce. "trans-1,1'-Bis(indenylidene)." Acta Crystallographica Section C Crystal Structure Communications 52, no. 4 (1996): 947–49. http://dx.doi.org/10.1107/s0108270195014600.

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Yu, Baoyi, Yu Xie, Fatma B. Hamad, et al. "Synthesis and characterization of non-chelating ruthenium–indenylidene olefin metathesis catalysts derived from substituted 1,1-diphenyl-2-propyn-1-ols." New Journal of Chemistry 39, no. 3 (2015): 1858–67. http://dx.doi.org/10.1039/c4nj02034k.

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Nascimento, Daniel L., Emma C. Davy, and Deryn E. Fogg. "Merrifield resin-assisted routes to second-generation catalysts for olefin metathesis." Catalysis Science & Technology 8, no. 6 (2018): 1535–44. http://dx.doi.org/10.1039/c7cy02278f.

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Phosphine-scavenging Merrifield resins can significantly facilitate the synthesis of highly active Ru metathesis catalysts, including the second-generation Grubbs, Hoveyda, and indenylidene catalysts (GII, HII, InII).

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Більше джерел

Дисертації з теми "Indenylidenes"

Urbina-Blanco, César A. "Design and synthesis of ruthenium indenylidene-based catalysts for olefin metathesis." Thesis, University of St Andrews, 2013. http://hdl.handle.net/10023/3737.

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Анотація:

As part of a European wide effort to develop metathesis catalysts for use in fine chemical and pharmaceutical compound synthesis, this study focuses on the design and synthesis of ruthenium based catalysts for olefin metathesis. The aim, of this work was simple: to develop new, more active, more stable, easy to synthesise and commercially viable Ruthenium based catalysts, as well trying to rationalize the effect of structural changes on reactivity. Two different approaches were explored in order to develop more active catalysts bearing N-heterocyclic carbene (NHC) ligands: changing the leaving

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Yalezo, Ntsikelelo. "Synthesis and characterization of Ru(II) phenyl-3-indenylidene olefin metathesis type complexes." Thesis, University of Fort Hare, 2015. http://hdl.handle.net/10353/d1021128.

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Анотація:

In this study, a series of Ru(II) phenyl-3-indenylidene complexes with general formula of [RuCl2(NHC)(Ind)(L)] (where L= triphenylphosphine, pyridine and NHC = five different types of N-heterocyclic carbene ligands), have been synthesized and characterized using FT-IR, UV-Vis, elementally analysis and melting/decomposition point. The N,N’-diarylimidazolinium chlorides have been used as N-heterocyclic carbene precursors and were synthesized from their corresponding N,N’-diarylformamidines and further characterized using 1H-NMR, 13C-NMR, FTIR and melting point determination. The infrared spectra

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Littlefield, Shalyn. "The synthesis of phosphonium indenylides and an investigation of their coordination to group 4 metals." Thesis, 2010. http://hdl.handle.net/1974/5528.

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Анотація:

A class of phosphonium cyclopentadienylide ligands was first reported in 1956 by Ramirez and Levy, who synthesized triphenylphosphonium cyclopentadienylide. They discovered that this ylide was unusually inert, for instance being unreactive with ketones; they attributed this unusual stability to its ability to undergo charge delocalization. It was subsequently found that the ylide coordinates to metals in η5 fashion, and thus one might anticipate a rich chemistry involved with these ligands, although surprisingly little research on this fascinating ligand has been reported over the past 50 year

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Частини книг з теми "Indenylidenes"

Dixneuf, Pierre H., and Christian Bruneau. "Ruthenium Indenylidene Catalysts for Alkene Metathesis." In Handbook of Metathesis. Wiley-VCH Verlag GmbH & Co. KGaA, 2015. http://dx.doi.org/10.1002/9783527674107.ch14.

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Clavier, Hervé, and Steven P. Nolan. "Building Indenylidene–Ruthenium Catalysts for Metathesis Transformations." In Green Metathesis Chemistry. Springer Netherlands, 2010. http://dx.doi.org/10.1007/978-90-481-3433-5_4.

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Mills, Nancy S. "Fluorenylidene and Indenylidene Dications: Insights about Antiaromaticity." In ACS Symposium Series. American Chemical Society, 2007. http://dx.doi.org/10.1021/bk-2007-0965.ch011.

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Urbina-Blanco, César A., Stefano Guidone, Steven P. Nolan, and Catherine S. J. Cazin. "Ruthenium-Indenylidene and Other Alkylidene Containing Olefin Metathesis Catalysts." In Olefin Metathesis. John Wiley & Sons, Inc., 2014. http://dx.doi.org/10.1002/9781118711613.ch15.

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Monsaert, Stijn, Els De Canck, Renata Drozdzak, et al. "Ruthenium–Indenylidene Complexes Bearing Saturated N-Heterocyclic Carbenes: Synthesis and Application in Ring-Closing Metathesis Reactions." In Green Metathesis Chemistry. Springer Netherlands, 2010. http://dx.doi.org/10.1007/978-90-481-3433-5_3.

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Clavier, Herve, and Steven P. Nolan. "Synthesis and Activity in Ring-Closing Metathesis of Phosphine and NHC-Containing Ruthenium–Indenylidene (Bis)Pyridine Complexes." In Metathesis Chemistry. Springer Netherlands, 2007. http://dx.doi.org/10.1007/978-1-4020-6091-5_2.

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Taber, Douglass. "Developments in Alkene Metathesis." In Organic Synthesis. Oxford University Press, 2011. http://dx.doi.org/10.1093/oso/9780199764549.003.0027.

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Анотація:

Hervé Clavier and Steven P. Nolan, now at St. Andrew’s University, found (Adv. Synth. Cat. 2008, 350, 2959) that the indenylidene Ru complex 1 was an excellent pre-catalyst for alkene metathesis. A combination of 1 and the ligand 2 effected cross metathesis of 3 and 4 in just 15 minutes under microwave heating. Robert H. Grubbs of Caltech designed (Organic Lett. 2008, 10, 2693) the Ru catalyst 6 for the preparation of tri- and tetrasubstituted alkenes, as illustrated by the conversion of 7 to 8. The catalyst 6 also worked well for cross metathesis and ring opening metathesis polymerization (RO

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