Log in

Relevant bibliographies by topics / Transition Metal, Asymmetric Catalysis / Dissertations / Theses

To see the other types of publications on this topic, follow the link: Transition Metal, Asymmetric Catalysis.

Dissertations / Theses on the topic 'Transition Metal, Asymmetric Catalysis'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 dissertations / theses for your research on the topic 'Transition Metal, Asymmetric Catalysis.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.

1

Veighy, Clifford Robert. "Novel cyclopentadienyl transition metal complexes." Thesis, University of Southampton, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.327366.

Full text

APA, Harvard, Vancouver, ISO, and other styles

2

Frost, Christopher Gregory. "Novel enantiopure ligands for asymmetric catalysis." Thesis, Loughborough University, 1994. https://dspace.lboro.ac.uk/2134/33263.

Full text

Abstract:

The scope of the palladium catalysed allylic substitution reaction is reviewed with particular reference to stereocontrol. The use of enantiopure oxazolines and acetals in asymmetric synthesis is briefly outlined. The work presented is concerned with the design and construction of enantiopure ligands which are able to impart very high levels of enantioselectivity in the aforementioned palladium-catalysed allylic substitution reaction. The ligands exploit the stereochemistry-controlling properties of the oxazoline moiety, whilst incorporating a secondary donor atom. The ligands rely upon an ele

APA, Harvard, Vancouver, ISO, and other styles

3

James, Daniel Stuart. "Novel nitrogen-sulfur chelate ligands for asymmetric catalysis." Thesis, University of Sheffield, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.287727.

Full text

APA, Harvard, Vancouver, ISO, and other styles

4

Garratt, Shaun Anthony. "Transition metal oxazoline complexes : synthesis and applications in asymmetric catalysis." Thesis, University of Leicester, 1998. http://hdl.handle.net/2381/30018.

Full text

Abstract:

This thesis describes the synthesis and chemistry of "(arene)Ru" and "Cp*Rh" complexes of chiral oxazoline-containing ligands and their use as asymmetric Lewis-acid catalysts. Chapter One introduces important aspects of asymmetric catalysis, then describes in more detail the use of chiral oxazoline ligands to induce high levels of stereocontrol in many important catalytic reactions. Chapter Two initially introduces the area of chiral half-sandwich complexes, describing their chemistry and their use in asymmetric synthesis. The synthesis and characterisation of half-sandwich ruthenium and rhodi

APA, Harvard, Vancouver, ISO, and other styles

5

Verendel, J. Johan. "Transition Metal Catalysis for Selective Synthesis and Sustainable Chemistry." Doctoral thesis, Uppsala universitet, Syntetisk organisk kemi, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-182900.

Full text

Abstract:

This thesis discusses the preparation and use of transition-metal catalysts for selective organic chemical reactions. Specifically, two different matters have been studied; the asymmetric hydrogenation of carbon-carbon double bonds using N,P-ligated iridium catalysts and the metal-catalyzed transfer of small molecules from biomass to synthetic intermediates. In the first part of this thesis, chiral N,P-ligands were synthesized and evaluated in iridium catalysts for the asymmetric hydrogenation of non- and weakly functionalized alkenes (Papers I & II). The new catalysts were prepared via ch

APA, Harvard, Vancouver, ISO, and other styles

6

Green, Simon Michael. "The synthesis and application of novel chiral transition metal complexes." Thesis, University of Southampton, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.285879.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Allen, Joanne Victoria. "Recent advances in asymmetric catalysis." Thesis, Loughborough University, 1995. https://dspace.lboro.ac.uk/2134/27574.

Full text

Abstract:

CHAPTER ONE reviews the literature, discussing aspects of transition metal mediated asymmetric catalysis in the presence of enantiomerically pure ligands. CHAPTER TWO discusses the asymmetric addition of dialkyl-zinc reagents to aromatic aldehydes. The work presented is particularly concerned with the design and construction of enantiomerically pure oxazoline ligands tethered to alcohols These ligands have proved effective in the acceleration of the alkylation reaction and are able to influence good levels of asymmetric induction in the resultant secondary alcohol products CHAPTER THREE examin

APA, Harvard, Vancouver, ISO, and other styles

8

Long, James Maurice. "Synthesis of new axially chiral diphosphines and phosphinamines for asymmetric catalysis." Thesis, University of Oxford, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.337600.

Full text

APA, Harvard, Vancouver, ISO, and other styles

9

Hedberg, Christian. "Design, Synthesis, Mechanistic Rationalization and Application of Asymmetric Transition-Metal Catalysts." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis : Univ.-bibl. [distributör], 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-5740.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Sieber, Joshua Daniel. "The tandem catalytic asymmetric allene diboration/imine allylation and the asymmetric transition-metal-catalyzed conjugate allylation of activated enones." Thesis, Boston College, 2008. http://hdl.handle.net/2345/355.

Full text

Abstract:

Thesis advisor: James P. Morken<br>Described herein are methods for asymmetric allylation. Chapter 1 describes the scope of the Pd-catalyzed asymmetric diboration of prochiral allenes. The products of this process possess both a chiral allylboronate functional group and a vinylboronate moiety. The allylboronate functionality can subsequently be used for imine allylation, without isolation of the diboron intermediate, resulting in the formation of atypical allylation products through a tandem, one-pot sequence. Furthermore, enantioselection in the catalytic diboration and chirality transfer in

APA, Harvard, Vancouver, ISO, and other styles

11

Newton, Claire. "New approaches to asymmetric transition metal catalysed reactions." Université Louis Pasteur (Strasbourg) (1971-2008), 1995. http://www.theses.fr/1995STR13018.

Full text

Abstract:

La premiere partie de ce travail decrit la synthese et la caracterisation de deux types de complexes d'iridium(+3) portant des ligands diphosphines et de formule generale ir(pp*)(l-l)hii et ir(pp*)(l-l)hi, ou l-l represente un ligand bidentate chelatant neutre (n-n, n-o, et pp*) ou anionique (n-o). Ces complexes possedent des centres metalliques stereogeniques. Grace a la presence de la diphosphine chirale, ces complexes existent sous la forme de deux diastereoisomeres. En variant les ligands chelatants, nous sommes arrives a changer les proportions relatives des diastereoisomeres et, dans un

APA, Harvard, Vancouver, ISO, and other styles

12

Tadikonda, Udaya Bhaskar. "Design, synthesis and applications of tetradentate transition metal complexes towards asymmetric alkylations." Diss., Tucson, Ariz. : University of Arizona, 2005. http://etd.library.arizona.edu/etd/GetFileServlet?file=file:///data1/pdf/etd/azu%5Fetd%5F1131%5F1%5Fm.pdf&type=application/pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

13

Brookings, Daniel Christopher. "The design, synthesis and application to asymmetric catalysis of chiral transition metal cyclopentadienyl complexes." Thesis, University of Southampton, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.273849.

Full text

APA, Harvard, Vancouver, ISO, and other styles

14

Loup, Joachim. "Selectivity Control in 3d Transition Metal-Catalyzed C–H Activation." Doctoral thesis, Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2019. http://hdl.handle.net/21.11130/00-1735-0000-0003-C19E-1.

Full text

APA, Harvard, Vancouver, ISO, and other styles

15

Barman, Sanmitra. "Helical transition metal complexes as catalysts for asymmetric sulfoxidations and aldol addition reactions." Diss., Kansas State University, 2010. http://hdl.handle.net/2097/7015.

Full text

Abstract:

Doctor of Philosophy<br>Department of Chemistry<br>Christopher J. Levy<br>Stepped helical salen complexes with vanadium as the central metal were synthesized and characterized. The helicity in these complexes arise from the fused phenyl rings (phenanthryl and benz[a]anthryl) as sidearms, whereas the chirality arises from the chiral cyclohexyl diamine or binaphthyl diamine backbones. These complexes showed good yields and moderate enantioselectivity in asymmetric sulfoxidation reactions with methylphenyl sulfide as the substrate and H2O2 or cumene hydroperoxide as the oxidants. To further impro

APA, Harvard, Vancouver, ISO, and other styles

16

周向葛 and Xiangge Zhou. "Asymmetric reactions catalyzed by transition metal complexes containing binaphthyl schiff bases and chiral porphyrinato ligands." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1999. http://hub.hku.hk/bib/B31239833.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Zhou, Xiangge. "Asymmetric reactions catalyzed by transition metal complexes containing binaphthyl schiff bases and chiral porphyrinato ligands /." Hong Kong : University of Hong Kong, 1999. http://sunzi.lib.hku.hk/hkuto/record.jsp?B21021363.

Full text

APA, Harvard, Vancouver, ISO, and other styles

18

Lihammar, Richard. "Enzyme- and Transition Metal-Catalyzed Asymmetric Transformations : Application of Enzymatic (D)KR in Enantioselective Synthesis." Doctoral thesis, Stockholms universitet, Institutionen för organisk kemi, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-108351.

Full text

Abstract:

Dynamic kinetic resolution (DKR) is a powerful method for obtaining compounds with high optical purity. The process relies on the combination of a kinetic resolution with an in situ racemization. In this thesis, a combination of an immobilized hydrolase and a transition metal-based racemization catalyst was employed in DKR to transform racemic alcohols and amines into enantioenriched esters and amides, respectively. In the first part the DKR of 1,2-amino alcohols with different rings sizes and N-protecting groups is described. We showed that the immobilization method used to support the lipase

APA, Harvard, Vancouver, ISO, and other styles

19

Böhnisch, Torben. "C₂-Symmetric Pyrazole-Bridged Ligands and Their Application in Asymmetric Transition-Metal Catalysis." Doctoral thesis, Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2015. http://hdl.handle.net/11858/00-1735-0000-0028-876A-6.

Full text

APA, Harvard, Vancouver, ISO, and other styles

20

Patil, Smita S. "The preparation and use of metal salen complexes derived from cyclobutane diamine." Diss., Kansas State University, 2014. http://hdl.handle.net/2097/18670.

Full text

Abstract:

Doctor of Philosophy<br>Department of Chemistry<br>Christopher J. Levy<br>The helix is an important chiral motif in nature, there is increasing development in field of helical transition metal complexes and related supramolecular structures. Hence, the goals of this work are to apply the principles of helicity in order to produce metal complexes with predictable molecular shapes and to study their properties as asymmetric catalysts. Computational studies suggest that the (1R,2R)-cyclobutyldiamine unit can produce highly twisted salen complexes with a large energy barrier between the M and P h

APA, Harvard, Vancouver, ISO, and other styles

21

Källström, Klas. "Catalytic Asymmetric Ketone and Alkene Reductions Using Transition Metal Complexes." Doctoral thesis, Uppsala University, Department of Chemistry, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-6839.

Full text

Abstract:

<p>This thesis contains seven papers dealing with iridium and ruthenium based catalytic asymmetric reductions, either of ketones into chiral alcohols, or olefins into chiral alkanes. The first part of the thesis describes how we have designed and evaluated new bicyclic ligands containing either <i>N</i>,<i>S</i> or <i>N</i>,<i>N</i> chelating atoms. The ligands have been evaluated in the asymmetric Ir-catalyzed transfer hydrogenation of acetophenone. The complexes evaluated induced good enentioselectivity of the product. Moreover we have also utilized a commercially available chiral diamine (Q

APA, Harvard, Vancouver, ISO, and other styles

22

Källström, Klas. "Catalytic asymmetric ketone and alkene reductions using transition metal complexes /." Uppsala : Acta Universitatis Upsaliensis : Universitetsbiblioteket [distributör], 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-6839.

Full text

APA, Harvard, Vancouver, ISO, and other styles

23

Tomifuji, Rei. "Studies on Design of 3d Transition Metal Lewis Acid Catalysts for Efficient Activation of Aldehydes and Imines." Doctoral thesis, Kyoto University, 2020. http://hdl.handle.net/2433/253290.

Full text

Abstract:

京都大学<br>0048<br>新制・課程博士<br>博士(工学)<br>甲第22454号<br>工博第4715号<br>新制||工||1736(附属図書館)<br>京都大学大学院工学研究科材料化学専攻<br>(主査)教授松原誠二郎, 教授杉野目道紀, 教授中尾佳亮<br>学位規則第4条第1項該当<br>Doctor of Philosophy (Engineering)<br>Kyoto University<br>DGAM

APA, Harvard, Vancouver, ISO, and other styles

24

Liao, Saihu [Verfasser], Benjamin [Akademischer Betreuer] List, and Albrecht [Akademischer Betreuer] Berkessel. "Asymmetric Counteranion-Directed Transition Metal Catalysis: Enantioselective Epoxidation and Sulfoxidation with Ion-Pair Catalysts / Saihu Liao. Gutachter: Benjamin List ; Albrecht Berkessel." Köln : Universitäts- und Stadtbibliothek Köln, 2011. http://d-nb.info/1038016584/34.

Full text

APA, Harvard, Vancouver, ISO, and other styles

25

Sarkisian, Ryan Gregory. "MULTICOMPONENT REACTIONS OF SALICYLALDEHYDE, CYCLIC KETONES, AND ARYLAMINES THROUGH COOPERATIVE ENAMINE-METAL LEWIS ACID CATALYSIS." Miami University / OhioLINK, 2014. http://rave.ohiolink.edu/etdc/view?acc_num=miami1409236804.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

Tolstoy, Päivi. "Synthesis and Evaluation of N,P-Chelating Ligands in Asymmetric Transition-Metal-Catalyzed Reactions : Ir-Catalyzed Asymmetric Hydrogenation and Pd-Catalyzed Asymmetric Intermolecular Heck Reaction." Doctoral thesis, Uppsala universitet, Institutionen för biokemi och organisk kemi, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-108940.

Full text

Abstract:

This thesis describes synthesis of new chiral N,P ligands and their evaluation in two types of asymmetric transition-metal catalyzed reactions. The first part of the thesis describes studies in iridium-catalyzed asymmetric hydrogenation. A new class of chiral N,P ligands, imidazole-phosphines, was synthesized and evaluated in the Ir-catalyzed asymmetric hydrogenation of olefins (Paper I). The new ligands proved to be highly efficient and enantioselective in the reaction. Because the substrate scope of Ir-catalyzed asymmetric hydrogenation is still limited to certain types of test substrates, n

APA, Harvard, Vancouver, ISO, and other styles

27

Afewerki, Samson. "Development of catalytic enantioselective C-C bond-forming and cascade transformations by merging homogeneous or heterogeneous transition metal catalysis with asymmetric aminocatalysis." Doctoral thesis, Mittuniversitetet, Avdelningen för naturvetenskap, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:miun:diva-23605.

Full text

Abstract:

Chiral molecules play a central role in our daily life and in nature, for instance the different enantiomers or diastereomers of a chiral molecule may show completely different biological activity. For this reason, it is a vital goal for synthetic chemists to design selective and efficient methodologies that allow the synthesis of the desired enantiomer. In this context, it is highly important that the concept of green chemistry is considered while designing new approaches that eventually will provide more environmental and sustainable chemical synthesis.The aim of this thesis is to develop th

APA, Harvard, Vancouver, ISO, and other styles

28

Buitrago, Elina. "Transition metal-catalyzed reduction of carbonyl compounds : Fe, Ru and Rh complexes as powerful hydride mediators." Doctoral thesis, Stockholms universitet, Institutionen för organisk kemi, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-75795.

Full text

Abstract:

A detailed mechanistic investigation of the previously reported ruthenium pseudo-dipeptide-catalyzed asymmetric transfer hydrogenation (ATH) of aromatic ketones was performed. It was found that the addition of alkali metals has a large influence on both the reaction rate and the selectivity, and that the rate of the reaction was substantially increased when THF was used as a co-solvent. A novel bimetallic mechanism for the ruthenium pseudo-dipeptide-catalyzed asymmetric reduction of prochiral ketones was proposed. There is a demand for a larger substrate scope in the ATH reaction, and heteroar

APA, Harvard, Vancouver, ISO, and other styles

29

Shibahara, Fumitoshi. "Studies on Asymmetric Carbonylation Reactions by Means of Polystyrene-Supported Transition Metal Catalysts." 京都大学 (Kyoto University), 2003. http://hdl.handle.net/2433/148900.

Full text

APA, Harvard, Vancouver, ISO, and other styles

30

Llewellyn, David B. "Design, synthesis and catalytic properties of chiral counteranions on transition metal catalysts : a new route to asymmetric induction." Thesis, McGill University, 2002. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=82918.

Full text

Abstract:

The design of enantioselective transition metal catalyzed reactions is an important area of chemical research. The purpose of this study was to develop a new method to incorporate chirality into transition metal catalysis via ion pairing interactions. This has led to the development of the first enantioselective transition metal catalyzed reaction using a chiral counteranion as the sole source of asymmetry.<br>In chapter two, the synthesis of a chiral bis(1,1'-bi-2-naphtholato)borate anion is described. This anion can be incorporated into cationic copper(I) complexes via anion exchange,

APA, Harvard, Vancouver, ISO, and other styles

31

Poole, Darren L. "Studies towards the nucleophilic dearomatisation of electron-deficient heteroaromatics and hydrogen borrowing reactions of methanol." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:d9b862ca-1680-42eb-b93b-a1a7d44e1a75.

Full text

Abstract:

<strong>Introduction – Dearomatisation of Heteroaromatic Compounds</strong> The introduction provides a survey of dearomatisation reaction of heteroaromatics, with a particular focus on pyridines/pyridinium salts and furans. The mechanism, scope, and limitations of various approaches are covered, along with the goals of this project. <strong>Results and Discussion – Dearomatisation of Electron-Deficient Heteroaromatics</strong> This chapter initially explores the asymmetric addition of organometallic nucleophiles to pyridinium salts bearing a chiral counterion. Unfortunately, this approach ult

APA, Harvard, Vancouver, ISO, and other styles

32

Hodgson, Richard. "Novel chiral di-N-heterocyclic carbene and hybrid phosphine-N-heterocyclic carbene ligands and their application to transition metal mediated asymmetric catalysis." Thesis, University of York, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.423839.

Full text

APA, Harvard, Vancouver, ISO, and other styles

33

Biswas, Souvagya. "Asymmetric Catalysis of Carbon-Carbon Bond Forming Reactions: Use of a Sustainable Feedstock Ethylene." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1449830785.

Full text

APA, Harvard, Vancouver, ISO, and other styles

34

Cheong, Paul Ha-Yeon. "Quantum mechanical investigations of the mechanisms and selectivities of synthetic organic reactions from organocatalysis to transition metal catalysis to substrate controlled asymmetric reactions /." Diss., Restricted to subscribing institutions, 2007. http://proquest.umi.com/pqdweb?did=1481668381&sid=1&Fmt=2&clientId=1564&RQT=309&VName=PQD.

Full text

APA, Harvard, Vancouver, ISO, and other styles

35

Zheng, Longsheng. "Synthese enantioselective d'alcools et d'aminoalcools par transfert d'hydrogene asymetrique catalyse par le rhodium et le ruthenium." Thesis, Paris Sciences et Lettres (ComUE), 2018. http://www.theses.fr/2018PSLEC015.

Full text

Abstract:

1.Synthese d'une nouvelle famille de catalyseurs a base de rhodium et leurs applications en transfert d'hydrogene asymetrique. 2. Syntheses enantio- et diastereo-selectives de derives 2-(1,2,3,4-tetrahydro-1-iso-quinolyl) ethanol par transfert d'hydrogene asymetrique et dedoublement cinetique dynamique. 3. Transfert d'hydrogene asymetrique associe au dedoublement cinetique dynamique : application a la synthese de diols 1,2 et d'amino-alcools 1,2 enantioenrichis<br>1. Synthesis of a new family of Rhodium-tethered Catalysts and their application in asymmetric transfer hydrogenation of ketones 2.

APA, Harvard, Vancouver, ISO, and other styles

36

Cheruku, Pradeep. "Asymmetric Hydrogenations : Syntheses of Ligands and Expansion of Substrate Scope." Doctoral thesis, Uppsala universitet, Institutionen för biokemi och organisk kemi, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-9353.

Full text

Abstract:

Asymmetric hydrogenation has emerged as a versatile methodology to obtain a wide range of chiral precursors. This thesis focused on the synthesis of new chiral ligands and the expansion of the substrate scope of asymmetric hydrogenations. Paper I described the synthesis and evaluation of N,P-ligands for the Ir-catalyzed hydrogenations of unfunctionalized olefins. The substrate scope of Ir-catalyzed asymmetric hydrogenations is limited to a narrow range of “test” olefins. The foremost focus of this thesis was to expand the substrate scope of Ir-catalyzed asymmetric hydrogenations. Papers II and

APA, Harvard, Vancouver, ISO, and other styles

37

Diesen, Jarle Sidney. "Asymmetric Hydrogenations of Imines, Vinyl Fluorides, Enol Phosphinates and Other Alkenes Using N,P-Ligated Iridium Complexes." Doctoral thesis, Uppsala universitet, Avdelningen för organisk kemi, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-8971.

Full text

Abstract:

The research described in this thesis is directed toward the efficient, enantioselective synthesis of chiral products that have useful functionality. This goal was pursued through catalytic asymmetric hydrogenation, a reaction class that selectively introduces one or two stereocenters into a molecule in an atom-efficient step. This reaction uses a small amount (often <1 mol%) of a chiral catalyst to impart stereoselectivity to the product formed. Though catalytic asymmetric hydrogenation is not a new reaction type, there remain many substrate classes for which it is ineffective. The present

APA, Harvard, Vancouver, ISO, and other styles

38

Hartikka, Antti. "Towards Rational Design of Asymmetric Catalyst for Organometallic and Organocatalytic Reactions." Doctoral thesis, Uppsala : University Library / Universitetsbiblioteket, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-7905.

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

Böhnisch, Torben [Verfasser], Franc [Akademischer Betreuer] [Gutachter] Meyer, Guido [Gutachter] Clever, et al. "C2-Symmetric Pyrazole-Bridged Ligands and Their Application in Asymmetric Transition-Metal Catalysis / Torben Böhnisch. Betreuer: Franc Meyer. Gutachter: Franc Meyer ; Guido Clever ; Thomas Waitz ; Ulf Diederichsen ; Dietmar Stalke ; Konrad Koszinowski." Göttingen : Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2016. http://d-nb.info/1103233963/34.

Full text

APA, Harvard, Vancouver, ISO, and other styles

40

Ayerbe, Garcia Marta [Verfasser]. "New Developments in Late Transition Metal Complexes of Ferrocene Based Ligands and Study of Their Efficiency as Catalysts in Asymmetric Reactions / Marta Ayerbe Garcia." München : Verlag Dr. Hut, 2016. http://d-nb.info/1106593693/34.

Full text

APA, Harvard, Vancouver, ISO, and other styles

41

Gillespie, Jason A. "Design and synthesis of wide bite angle phosphacyclic ligands." Thesis, University of St Andrews, 2012. http://hdl.handle.net/10023/3100.

Full text

Abstract:

By examining structure activity relationships for a given catalytic reaction it is possible to discover what ligand features and parameters lead to stable and highly active/selective catalyst systems. With this knowledge in hand it may be possible to rationally design next generation ligands and catalysts to affect improved substrate transformations, with higher selectivities and faster reaction times. The success of Burk's DuPhos ligands in asymmetric hydrogenation demonstrated that chiral phosphacycles can be a potent source of chiral induction, whilst in a similar vein the work of van Leeuw

APA, Harvard, Vancouver, ISO, and other styles

42

Kong, Lingyu. "De ligands NHCs prochiraux à des complexes métal-NHC énantiopurs : nouvelles perspectives pour la catalyse asymétrique." Electronic Thesis or Diss., Aix-Marseille, 2019. http://www.theses.fr/2019AIXM0502.

Full text

Abstract:

Les carbènes N-hétérocycliques (NHC) sont connus pour être de bons ligands des métaux de transition (TM). Dans ce manuscrit, le premier chapitre est consacré une présentation non exhaustive des différentes approches qui ont été utilisées dans la littérature pour le design de NHCs chiraux efficaces en catalyse enantiosélective. Au début du deuxième chapitre, le nouveau concept est présenté. Celui-ci repose sur la formation d’un axe de chiralité qui est créé lors de la coordination du ligand NHC à un métal de transition. Ce chapitre est consacré à la synthèse de complexes possédant une symétrie

APA, Harvard, Vancouver, ISO, and other styles

43

Kang, Jianxing. "Water Soluble Phosphines, Their Transitional Metal Complexes, and Catalysts." Thesis, Virginia Tech, 1997. http://hdl.handle.net/10919/36782.

Full text

Abstract:

In recent years two-phase catalysis has been established as a new field of catalyzed processes and has achieved industrial-scale importance in olefin hydroformylation. Two-phase reactions have a number of advantages, for example, ease of separation of catalyst and product, catalysts can be tailored to the particular problem, use of special properties and effects of water as a solvent, and low environmental impact. For higher olefins (* C6), the reaction suffers low activity due to low water solubility of higher olefins. Tricesium analog of TPPTS, m,m,m-trisulfonated triphenylphosphine, was sy

APA, Harvard, Vancouver, ISO, and other styles

44

Ruda, Antonio M. "New approaches to metal free asymmetric catalysis." Thesis, Cardiff University, 2007. http://orca.cf.ac.uk/55697/.

Full text

Abstract:

This thesis embraces three main sections: the development of new molecular scaffolds for the organocatalytic Diels-Alder reaction, extension of the studies upon the a-effect and ji-stacking interactions to acyl-ammonium catalysis and development of novel molecular structures for the aminocatalysed Baylis-Hillman reaction. Chapter 1 describes some of the recent advances made in metal-free asymmetric catalysis and sets the work involved within this thesis into context. Chapter 2 describes the investigation of the a-effect and the modulation of face-face ji-jt interactions as a platform for the d

APA, Harvard, Vancouver, ISO, and other styles

45

Veyrat, Marc. "Synthèse de porphyrines et métalloporphyrines chirales dérivées d'aldéhydes alicycliques : application à la catalyse d'époxydation asymétrique d'alcènes." Université Joseph Fourier (Grenoble ; 1971-2015), 1994. http://www.theses.fr/1994GRE10191.

Full text

Abstract:

De nombreux prototypes de porphyrines comportant des superstructures chirales elaborees ont ete synthetises au cours de la derniere decennie, en vue de l'utilisation de leurs complexes metalliques comme catalyseurs d'epoxydation asymetrique des alcenes. L'utilite de ces composes est en general limitee, du fait de leur synthese laborieuse et des etapes de separation d'isomeres qu'elle comporte. L'approche originale decrite dans cette these fournit des catalyseurs asymetriques de structure plus simple, d'obtention plus facile, et donc potentiellement plus utiles. Une etude preliminaire, centree

APA, Harvard, Vancouver, ISO, and other styles

46

Dogbevia, Moses K. "Gas phase transition metal-cluster catalysis /." abstract and full text PDF (free order & download UNR users only), 2005. http://0-wwwlib.umi.com.innopac.library.unr.edu/dissertations/fullcit/3209128.

Full text

Abstract:

Thesis (Ph. D.)--University of Nevada, Reno, 2005.<br>"August, 2005." Includes bibliographical references. Online version available on the World Wide Web. Library also has microfilm. Ann Arbor, Mich. : ProQuest Information and Learning Company, [2005]. 1 microfilm reel ; 35 mm.

APA, Harvard, Vancouver, ISO, and other styles

47

Readman, Sarah Kristy. "Transition metal catalysis for radical generation." Thesis, Imperial College London, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.395110.

Full text

APA, Harvard, Vancouver, ISO, and other styles

48

Arp, Forrest O. "Progress in transition metal-based enantioselective catalysis." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/45427.

Full text

Abstract:

Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 2008.<br>Vita.<br>Includes bibliographical references.<br>In Chapter 1, the first enantioselective cross-coupling reactions of racemic secondary benzylic halides are described (eq 1). This method was applied to the syntheses of intermediates employed by other groups in the generation of bioactive compounds, e.g., an androgen receptor agonist (1.1) and two members of the trikentrin family of natural products (1.2 and 1.3). In Chapter 2, the first method for the kinetic resolution of indolines through catalytic Nacylatio

APA, Harvard, Vancouver, ISO, and other styles

49

Warner, P. "Asymmetric synthesis via transition metal acyl complexes." Thesis, University of Oxford, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.355823.

Full text

APA, Harvard, Vancouver, ISO, and other styles

50

Franchino, Allegra. "New asymmetric metal-catalysed addition processes for amine synthesis." Thesis, University of Oxford, 2017. https://ora.ox.ac.uk/objects/uuid:c8207684-596d-4fb8-b93e-292911b45b5d.

Full text

Abstract:

This thesis concerns the development of novel catalytic approaches for the construction of stereocentres bearing a nitrogen atom. In 2011, the Dixon group reported a Ag(I)/cinchona-derived amino phosphine catalytic system for the activation of isocyanoacetates in asymmetric aldol and Mannich reactions. During this thesis work it was sought to extend the scope of this catalytic system to Mannich additions of other isocyanide pronucleophiles, then the focus was broadened to include Reformatsky and α-alkylation reactions of ketimine substrates. Chapter 1 gives an overview of the state of the art

APA, Harvard, Vancouver, ISO, and other styles

We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!