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Novel Chiral Di N Heterocyclic Carbene And Hybrid Phosphine N Heterocyclic Carbene Ligands And Their Application To Transition Metal Mediated Asymmetric Catalysis
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Book Synopsis Novel Chiral Di-N-heterocyclic Carbene and Hybrid Phosphine-N-heterocyclic Carbene Ligands and Their Application to Transition Metal Mediated Asymmetric Catalysis by :
Download or read book Novel Chiral Di-N-heterocyclic Carbene and Hybrid Phosphine-N-heterocyclic Carbene Ligands and Their Application to Transition Metal Mediated Asymmetric Catalysis written by and published by . This book was released on 2005 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Chiral Phosphorous Based Ligands in Earth-Abundant Transition Metal Catalysis by : Junliang Zhang
Download or read book Chiral Phosphorous Based Ligands in Earth-Abundant Transition Metal Catalysis written by Junliang Zhang and published by Elsevier. This book was released on 2023-05-27 with total page 322 pages. Available in PDF, EPUB and Kindle. Book excerpt: Chiral Phosphorous Based Ligands in Earth-Abundant Transition Metal Catalysis summarizes the most significant progress in the field of chiral phosphine ligand chemistry and a broad range of earth-abundant transition metal/chiral phosphine ligand-catalyzed enantioselective transformations. The book provides an authoritative and in-depth understanding of important topics about asymmetric catalysis based on earth-abundant transition metals/chiral phosphine ligands, making it ideal for organic chemistry researchers working in the field of asymmetric catalysis, synthetic methodologies and total synthesis.The development of new chiral phosphine ligands to achieve precise stereo control in many earth-abundant transition metal-catalyzed reactions is a very important field in organic synthesis, materials science and medicinal chemistry. The asymmetric synthesis promoted by transition metal/chiral phosphine ligands provides one of the most ideal ways to produce valuable optically active chemicals. Includes a discussion of state-of-the-art asymmetric organic reactions mediated by earth-abundant transition metals and chiral phosphine ligands Features the progress and the prospect of chiral phosphine ligands in asymmetric transition metal catalysis Covers the asymmetric reactivity modes of earth-abundant transition metals and phosphine ligands
Book Synopsis New Chiral N-heterocyclic Carbene-imine Ligands and Their Application to Asymmetric Catalysis by : Ludovic Grkegoire Bonnet
Download or read book New Chiral N-heterocyclic Carbene-imine Ligands and Their Application to Asymmetric Catalysis written by Ludovic Grkegoire Bonnet and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Functionalised N-Heterocyclic Carbene Complexes by : Olaf Kühl
Download or read book Functionalised N-Heterocyclic Carbene Complexes written by Olaf Kühl and published by Wiley. This book was released on 2010-03-08 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt: N-heterocyclic carbenes (NHCs) have found increasing use as reagents for a range of organic transformations and in asymmetric organocatalysis. The performance of these molecules can be improved and tuned by functionalisation. Functionalised carbenes can anchor free carbenes to the metal site, introduce hemilability, provide a means to immobilise transition metal carbene catalysts, introduce chirality, provide a chelate ligand or bridge two metal centres. NHC can be attached to carbohydrates and campher, derived from amino acids and purines, they can be used as organocatalysts mimicking vitamin B1 or as weak “solvent” donors in lanthanide chemistry. Functionalised N-Heterocyclic Carbene Complexes describes major trends in functionalised NHC ligands, aiming to assist readers in their attempts to develop and apply their own functionalised carbenes. After an introduction to the chemistry and behaviour of NHC, the book gives a detailed description of functionalised carbenes and their complexes according to a range of functional groups, each with a discussion of the synthetic route, structure, stability and performance. Functionalised N-Heterocyclic Carbene Complexes is an essential guide to fine-tuning this important class of compounds for practitioners, researchers and advanced students working in synthetic organometallic and organic chemistry and catalysis.
Book Synopsis New Chiral Di-n-heterocyclic Carbene Ligands and Their Application in Enantioselective Hydrogenation, Hydroformylation and 1,4-conjugate Addition Reactions. a Study Toward Rational Development of Di-n-heterocyclic Carbene Complexes in Enantioselective Catalysis by : Matthew Stephen Jeletic
Download or read book New Chiral Di-n-heterocyclic Carbene Ligands and Their Application in Enantioselective Hydrogenation, Hydroformylation and 1,4-conjugate Addition Reactions. a Study Toward Rational Development of Di-n-heterocyclic Carbene Complexes in Enantioselective Catalysis written by Matthew Stephen Jeletic and published by . This book was released on 2010 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: We finally present catalytic hydrogenation, hydrogen transfer, hydrosilylation, hydroformylation and 1,4-conjugate addition reactions. The % e.e. for hydrogenation ranged from 0-10%. for the reactions involving hydrogen. These results are attributable to either reductive elimination of the diNHC from the metal center, high temperatures necessary to achieve reaction conversion, or the inherent flexibility of the DEAM ligands. The Pd(diNHC) complexes achieved better selectivity in 1,4-conjugate addition reactions (0-67% e.e.).
Book Synopsis N-heterocyclic Carbenes and Their Application as Ligands for Transition Metal Mediated Synthesis by :
Download or read book N-heterocyclic Carbenes and Their Application as Ligands for Transition Metal Mediated Synthesis written by and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis N-heterocyclic Carbene Ligands for Iridium-catalysed Asymmetric Hydrogenation by : Steve Nanchen
Download or read book N-heterocyclic Carbene Ligands for Iridium-catalysed Asymmetric Hydrogenation written by Steve Nanchen and published by Cuvillier Verlag. This book was released on 2005 with total page 227 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Synthesis of New PCP N-heterocyclic Carbene Ligands, Complexes with Transition Metals, and Application in Asymmetric Catalysis by : Sebastian Martin Gischig
Download or read book Synthesis of New PCP N-heterocyclic Carbene Ligands, Complexes with Transition Metals, and Application in Asymmetric Catalysis written by Sebastian Martin Gischig and published by . This book was released on 2005 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Development of Novel Chiral Sulfoxide, Phosphine-olefin and N-heterocyclic Carbene Ligands for Assymmetric Catalysis by : Ronaldo Mariz
Download or read book Development of Novel Chiral Sulfoxide, Phosphine-olefin and N-heterocyclic Carbene Ligands for Assymmetric Catalysis written by Ronaldo Mariz and published by . This book was released on 2010 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Transition Metal Catalyzed Enantioselective Allylic Substitution in Organic Synthesis by : Uli Kazmaier
Download or read book Transition Metal Catalyzed Enantioselective Allylic Substitution in Organic Synthesis written by Uli Kazmaier and published by Springer Science & Business Media. This book was released on 2011-10-29 with total page 354 pages. Available in PDF, EPUB and Kindle. Book excerpt: Giovanni Poli, Guillaume Prestat, Frédéric Liron, Claire Kammerer-Pentier: Selectivity in Palladium Catalyzed Allylic Substitution.- Jonatan Kleimark and Per-Ola Norrby: Computational Insights into Palladium-mediated Allylic Substitution Reactions.- Ludovic Milhau, Patrick J. Guiry: Palladium-catalyzed enantioselective allylic substitution.- Wen-Bo Liu, Ji-Bao Xia, Shu-Li You: Iridium-Catalyzed Asymmetric Allylic Substitutions.- Christina Moberg: Molybdenum- and Tungsten-Catalyzed Enantioselective Allylic Substitutions.- Jean-Baptiste Langlois, Alexandre Alexakis: Copper-catalyzed enantioselective allylic substitution.- Jeanne-Marie Begouin, Johannes E. M. N. Klein, Daniel Weickmann, B. Plietker: Allylic Substitutions Catalyzed by Miscellaneous Metals.- Barry M. Trost, Matthew L. Crawley: Enantioselective Allylic Substitutions in Natural Product Synthesis.
Book Synopsis Chiral Iron Pyridine Complexes and Ruthenium Complexes with N-Heterocyclic Carbene and Macrocyclic (N, O) Donor Atom Ligands by : Kar-Yee Lam
Download or read book Chiral Iron Pyridine Complexes and Ruthenium Complexes with N-Heterocyclic Carbene and Macrocyclic (N, O) Donor Atom Ligands written by Kar-Yee Lam and published by . This book was released on 2017-01-26 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation, "Chiral Iron Pyridine Complexes and Ruthenium Complexes With N-heterocyclic Carbene and Macrocyclic (N, O) Donor Atom Ligands: Synthesis, Catalytic Activity and Biological Studies" by Kar-yee, Lam, 林嘉儀, was obtained from The University of Hong Kong (Pokfulam, Hong Kong) and is being sold pursuant to Creative Commons: Attribution 3.0 Hong Kong License. The content of this dissertation has not been altered in any way. We have altered the formatting in order to facilitate the ease of printing and reading of the dissertation. All rights not granted by the above license are retained by the author. Abstract: Abstract of thesis entitled CHIRAL IRON PYRIDINE COMPLEXES AND RUTHENIUM COMPLEXES WITH N-HETEROCYCLIC CARBENE AND MACROCYCLIC(N, O) DONOR ATOM LIGANDS: SYNTHESIS, CATALYTIC ACTIVITY AND BIOLOGICAL STUDIES Submitted by Lam Kar Yee For the degree of Doctor of Philosophy at The University of Hong Kong in April 2016 Transition metal complexes are widely applied as catalysts for organic transformation reactions such as the oxygen atom and nitrene transfer reactions and there is a growing interest to develop the medicinal applications of transition metal complexes. The studies of reactive metal-oxo and metal-nitrene intermediates are important in probing the underlying reaction mechanisms. This thesis is comprised of three main parts. In the first part, iron complexes with chiral pyridine ligands, such as 4′,6-disubstituted 2,2′ 6′,2″-terpyridine (NNN ) and 4′,6,6″-trisubstituted 2,2′ 6′,2″''-terpyridine (NNN ), were studied for their catalytic activities in asymmetric epoxidation, aziridination, amidation and sulfimidation reactions. The Fe-NNN complex catalyzed intermolecular nitrene transfer/CN bond formation reactions of styrenes with PhINTs in moderate product yields. For the asymmetric intramolecular amidation, the Fe-NNN complex can catalyze intramolecular C-N bond formation using PhI(OAc) as oxidant to form five- or six-membered ring products. The highest product yield obtained was 91 %. The complete conversion of para-substituted phenyl methyl sulfides to corresponding sulfimides was observed by using the Fe-NNN 1 2 complex as catalyst. Both the Fe-NNN and Fe-NNN complexes catalyzed asymmetric epoxidation of styrene using PhIO as oxidant at 0 C. The reaction intermediates of the nitrene/oxygen transfer reactions were studied by ESI-MS and high-valent iron-ligand multiple bonded species are proposed to be the reaction intermediates. In the second part, ruthenium pincer N-heterocyclic carbene (CNC) complexes were prepared and characterized by spectroscopic means and X-ray crystallography. II 2+ Complex [Ru (CNC)(bpy)(MeCN)], in which the CNC ligand adopts a fac-coordination mode and contains reactive CH bond of bridging methylene group, was found to react with PhINTs to result in the formation of a new CN bond and cleavage of one existing NC(methylene) bond of the CNC ligand, as revealed by X-ray crystal structure determination of the ruthenium complex product. The reaction 2+ of [Ru(CNC)(bpy)(MeCN)] with PhINTs was monitored by ESI-MS, UV-vis, and NMR spectroscopy; a paramagnetic Ru(III)-amido complex was isolated, which apparently resulted from intramolecular imido/nitrene CH insertion of a Ru(IV)-imido/nitrene intermediate and was found to undergo the observed CN bond cleavage. Such type of CN bond cleavage induced by metal-mediated imido/nitrene insertion is unprecedented in literature. The final part of this thesis is the study of the anti-angiogenic and anti-metastatic properties of the ruthenium complexes. Ruthenium complexes with different oxidation states (+2 and +3) and ligands (pincer NHC and macrocyclic (N, O) donor atom ligands) were examined for their cytotoxicity and anti-angiogenesis activity. III Among the complexes studied, [Ru (N O )Cl ]Cl (Ru-1) displays promising 2 2 2 inhibi
Book Synopsis New Complexes of Transition Metals with N-heterocyclic Carbene Ligands and Their Applications in Catalysis by : Sarim Dastgir
Download or read book New Complexes of Transition Metals with N-heterocyclic Carbene Ligands and Their Applications in Catalysis written by Sarim Dastgir and published by . This book was released on 2005 with total page 530 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Novel Di(N-heterocyclic Carbene) Ligands and Related Transition Metal Complexes by : Marco Monticelli
Download or read book Novel Di(N-heterocyclic Carbene) Ligands and Related Transition Metal Complexes written by Marco Monticelli and published by . This book was released on 2017 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The PhD, a collaboration between the University of Padova and the University of Strasbourg, is focused on the chemistry of di(N-heterocyclic carbene) ligands and can be divided in four families of ligands that constitute the four chapters: i) metal complexes (Cu(I), Ag(I), Au(I), Ir(III), Ru(II)) with di(N-heterocyclic carbene) ligands bearing a rigid phenylene bridge between the carbene units; ii) metal complexes (Cu(I), Ag(I), Au(I), Ru(II)) combining an imidazole-based NHC ligand functionalized with a triazole in the 5 position of the backbone; iii) metal complexes (Ag(I), Au(I), Pd(II)) with heteroditopic ligands based on imidazol-2-ylidene and 1,2,3-triazol-5-ylidene moieties connected with a propylene bridge; iv) bis(benzoxazolium) proligands and attempted synthesis of related transition metal complex.
Book Synopsis Chiral Ferrocenes in Asymmetric Catalysis by : Li-Xin Dai
Download or read book Chiral Ferrocenes in Asymmetric Catalysis written by Li-Xin Dai and published by John Wiley & Sons. This book was released on 2010-02-01 with total page 433 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book meets the long-felt need for a reference on ferrocenes with the focus on catalysis. It provides a thorough overview of the synthesis and characterization of different types of chiral ferrocene ligands, their application to various catalytic asymmetric reactions, and versatile chiral materials as well as drug intermediates synthesized from them. Written by the "who's who" of ferrocene catalysis, this is a guide to the design of new ferrocene ligands and synthesis of chiral synthetic intermediates, and will thus be useful for organic, catalytic and synthetic chemists working in academia, industrial research or process development.
Book Synopsis Chiral N-Heterocyclic Carbene Ligands for Asymmetric Catalysis by : Johannes Diesel
Download or read book Chiral N-Heterocyclic Carbene Ligands for Asymmetric Catalysis written by Johannes Diesel and published by . This book was released on 2019 with total page 481 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mots-clés de l'auteur: Carbenes ; Asymmetric Catalysis ; C-H Functionalization ; NHC ; Nickel ; Ligand Design.
Book Synopsis Synthesis of Transition Metal N-heterocyclic Carbene Complexes and Applications in Catalysis by : Michael Holtz-Mulholland
Download or read book Synthesis of Transition Metal N-heterocyclic Carbene Complexes and Applications in Catalysis written by Michael Holtz-Mulholland and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Transition Metal Complexes of N-heterocyclic Carbenes and Derivatives Thereof by : Timothy Gordon Larocque
Download or read book Transition Metal Complexes of N-heterocyclic Carbenes and Derivatives Thereof written by Timothy Gordon Larocque and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: N-heterocyclic carbenes (NHCs) have played a dominant role in organometallic chemistry for decades and revolutionized the field of homogenous catalysis. NHCs have been thoroughly studied, both experimentally and theoretically, and have shown unique reactivity towards transition metals, chalcogens, azides and pnictogens. This thesis is aimed at utilizing the unique reactivity of N-heterocyclic carbenes to develop novel, robust catalysts to mediate organic transformations. The multi-faceted work within this thesis explores the use of NHCs as ancillary ligands on early and late transition metals as potential catalysts for olefin polymerization and ring-closing metathesis, respectively. This work also includes exploring the synthesis and coordination of ancillary ligands derived from the unique reactivity of NHCs towards azides, chalcogens and pnictinidenes. The reactivity of a novel aryl-substituted acyclic imino-N-heterocyclic carbene to early transition metals, cyclooctasulfur and Grubbs-type ruthenium benzylidene complexes was explored. The reactivity of imidazol-2-imide towards Grubbs-type ruthenium benzylidene complexes and the synthesis and coordination of a novel group of ligands bearing an imidazol-2-imine scaffold were also explored. Lastly, this work will include the reactivity of IMes=PPh to Grubbs-type ruthenium benzylidene complexes.
