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Dissertations / Theses on the topic 'Chiral ligands ; asymmetric catalysis'

Author: Grafiati

Published: 4 June 2021

Last updated: 7 February 2022

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1

Pernazza, Daniele. "New chiral ligands for asymmetric catalysis." Thesis, University of Glasgow, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.269501.

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2

Moreau, Christelle. "Chiral nitrogen ligands in asymmetric catalysis." Thesis, University of Bath, 2000. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.341159.

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3

Lund, Andrew. "Sulphoxides as ligands for asymmetric catalysis." Thesis, University of Liverpool, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.484294.

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4

Belda, de Lama Oscar. "Bispyridylamides as ligands in asymmetric catalysis." Doctoral thesis, KTH, Chemistry, 2004. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3764.

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<p>This thesis deals with the preparation and use of chiralbispyridylamides as ligands in metal-catalyzed asymmetricreactions.</p><p>The compounds were prepared by amide formation usingdifferent coupling reagents. Bispyridylamides havingsubstituents in the 4- or 6- positions of the pyridine ringswere prepared by functional group interconversion of the 4- or6- halopyridine derivatives. These synthetic approaches provedto be useful for various types of chiral backbones. Pseudo C<sub>2</sub>-symmetric bispyridylamides were also synthesizedby means of stepwise amide formation.</p><p>The compounds

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5

Cubbon, Rachel Jane. "Novel nitrogen-phosphorus ligands for asymmetric catalysis." Thesis, University of Sheffield, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.310817.

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6

Czauderna, Christine F. "Novel chiral wide bite angle ligands for asymmetric catalysis." Thesis, University of St Andrews, 2013. http://hdl.handle.net/10023/3670.

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Achiral wide bite angle ligands have been shown to be highly active and to induce excellent chemo- and regioselectivities in many homogeneously catalyzed reactions. However, only a few examples of chiral wide bite angle ligands are known so far. A diphenyl ether backbone was selected to allow maximum synthetic versatility and potential for a modular approach to design and synthesize such chiral diphosphorus ligands. Three synthetic strategies have been explored in this thesis: i) introduction of chiral substituents in the ligand backbone, ii) the use of P-stereogenic donor atoms and iii) the s

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7

Axe, Philip. "Pseudo-C3-symmetric titanium complexes for asymmetric catalysis." Thesis, University of Bath, 2008. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.512296.

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8

Rahm, Fredrik. "Chiral Pyridine-Containing Ligands for Asymmetric Catalysis. Synthesis and Applications." Doctoral thesis, KTH, Chemistry, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3564.

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<p>This thesis deals with the design and syntheses of chiral,enantiopure pyridinecontaining ligands and their applicationsin asymmetric catalyis.</p><p>Chiral pyridyl pyrrolidine ligands and pyridyl oxazolineligands were synthesized and employed in thepalladium-catalysed allylic alkylation of 1,3-diphenyl-2-propenyl acetate with dimethyl malonate. Theinfluence of the steric properties of the ligands wereinvestigated.</p><p>Ditopic ligands, containing crown ether units as structuralelements, were synthesized and some of the ligands were used asligands in the palladiumcatalysed allylic alkylatio

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9

Hallman, Kristina. "Asymmetric Catalysis : Ligand Design and Conformational Studies." Doctoral thesis, KTH, Chemistry, 2001. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3275.

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<p>This thesis deals with the design of ligands for efficientasymmetric catalysis and studies of the conformation of theligands in the catalytically active complexes. All ligandsdeveloped contain chiral oxazoline heterocycles.</p><p>The conformations of hydroxy- and methoxy-substitutedpyridinooxazolines and bis(oxazolines) during Pd-catalysedallylic alkylations were investigated using crystallography,2D-NMR techniques and DFT calculations. A stabilising OH-Pdinteraction was discovered which might explain the differencein reactivity between the hydroxy- and methoxy-containingligands. The confor

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10

Camponovo, Francesco Patrizio. "Chiral ferrocenyl amidines as modular ligands for applications in asymmetric catalysis /." Zürich : ETH, 2009. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=18199.

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11

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.

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12

Cheemala, Narasimha Murthy. "Synthesis of New Chiral Phosphine Ligands and Their Applications in Asymmetric Catalysis." Diss., lmu, 2007. http://nbn-resolving.de/urn:nbn:de:bvb:19-73832.

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13

Axet, Martí M. Rosa. "New chiral ligands in asymmetric catalysis. Application in stabilization of metal nanoparticles." Doctoral thesis, Universitat Rovira i Virgili, 2006. http://hdl.handle.net/10803/9077.

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Tesi Doctoral M. Rosa Axet<br/><br/>La tesi consta del desenvolupament i aplicació de lligands difosfit derivats de carbohidrats a la reacció d'hidroformilació i hidrogenació catalitzada per rodi. També s'ha estudiat la aplicació de diferents lligands derivats de carbohidrats com ha estabilitzants de nanopartícules metàl·liques.<br/><br/>En el capítol 2 es discuteix la síntesi i caracterització de nous lligands difosfit. Aquesta nova sèrie de lligands modulables es caracteritza per tenir estructura de furanòsid amb simetria C2, on es poden introduir diferents substituents en l'anell i en els

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14

Duan, Wei-Liang. "Development of chiral phosphine-olefin ligands and their use in asymmetric catalysis." 京都大学 (Kyoto University), 2007. http://hdl.handle.net/2433/136788.

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15

Bunlaksananurson, Tanasri. "Novel Synthesis of Chiral 1,2-Aminophosphine Ligands and Their Applications in Asymmetric Catalysis." Diss., lmu, 2003. http://nbn-resolving.de/urn:nbn:de:bvb:19-47026.

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16

Marques, Carolina Silva. "Synthesis and evaluation of chiral phosphine and NHC-Ligands or heterogeneous asymmetric catalysis." Doctoral thesis, Universidade de Évora, 2013. http://hdl.handle.net/10174/15896.

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No âmbito deste trabalho, foram estudadas as reacções de arilação catalítica assimétrica em vários substratos, utilizando novos e já conhecidos catalisadores quirais, possuindo metais de transição. Esta metodologia levou à formação de novas ligações C-C, fornecendo uma panóplia de interessantes compostos, podendo-se revelar intermediários extremamente úteis na síntese de compostos biologicamente activos. Deve-se salientar a síntese de aminas quirais, α-hidroxiésteres, α-amino-ácidos e α-aminoésteres e também bi-arildiarilaminas, utilizando catalisadores de metais de transição, baseados em Pd,

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17

Bonnet, Ludovic GreÌgoire. "New chiral N-heterocyclic carbene-imine ligands and their application to asymmetric catalysis." Thesis, University of Birmingham, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.403052.

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18

Tucker, S. C. "Towards novel ligands for catalytic asymmetric oxidation." Thesis, University of Oxford, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.242038.

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19

Marinho, Vanda Raquel Delgado. "Synthesis and application of new immobilized chiral bidentate ligands for solid phase asymmetric catalysis." Doctoral thesis, Universidade de Évora, 2010. http://hdl.handle.net/10174/22518.

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Ligandos de fosfina-amida com coordenação P,O- e um grupo OH livre foram sintetizados partindo de o-(dppba) na presença de DCC/DMAP. Com base em estudos computacionais supõe-se que a presença do grupo OH livre actue como grupo de coordenação adicional no catalisador activo. Os ligandos de fosfina-amidaéster com coordenação P, O- foram sintetizados usando EDC/HOBT. Alguns ligandos de fosfina foram aplicados em reacções de catálise assimétrica homogénea como Alquilação e Aminação Alílica Assimétrica, Hidrosililação Assimétrica, Hidrogenação por Transferência de Hidrogénio e Reacção Intermolecula

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20

Fung, Wai-hong. "Catalytic and asymmetric organic oxidations by chiral oxoruthenium(IV) and cis- dioxoruthenium(VI) complexes with nitrogen donor ligands /." Hong Kong : University of Hong Kong, 1998. http://sunzi.lib.hku.hk/hkuto/record.jsp?B19481688.

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21

Harm, A. M. "Chiral ligands for asymmetric metal-catalysed additions to alkenes." Thesis, University of Newcastle Upon Tyne, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.318258.

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22

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.

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23

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.

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24

Martorell, Colomer Aina. "Chiral biaryl monodentate cyclic phosphonites and phosphites for asymmetric catalysis." Thesis, University of Bristol, 2001. http://hdl.handle.net/1983/c3c79146-8c6a-4ba1-9eb6-6d5779456813.

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A serieso f chiral biaryl cyclic monophosphoniteli gands of type RP(OAr)2 (R = Ph, Me, t-Bu, o-anisyl and Cy; (OAr)2 = 1,1'-binaphthyl-2,2'-diyl, 9,9'- biphenanthryl- 10,1 0'-diyl) have been prepared. The ligands have been synthesised by reaction of the dichlorophosphine precursor with the corresponding biphenol (HOAr)2. Chiral biaryl diphosphonite ligand (ArO)2PCH2CH2(OAr)2 derived from binaphthol has also been prepared. Platinum(II), palladium(II) and rhodium(I) complexes of these ligands are described and the X-ray crystal structures of five of these complexes are reported and discussed.T h

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25

Hulmes, David. "An axially chiral P,N ligand for asymmetric homogeneous catalysis." Thesis, University of Oxford, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.359505.

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26

馮偉康 and Wai-hong Fung. "Catalytic and asymmetric organic oxidations by chiral oxoruthenium(IV)and cis- dioxoruthenium(VI) complexes with nitrogen donor ligands." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1998. http://hub.hku.hk/bib/B31236881.

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27

Yamamoto, Takeshi. "Polyquinoxaline-Based Helically Chiral Phosphine Ligands for Catalytic Asymmetric Synthesis." 京都大学 (Kyoto University), 2010. http://hdl.handle.net/2433/131894.

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28

Olcay, Elmali. "Asymmetric Syntheses Of Various Novel Chiral Ligands With Norbornene Backbone: The Use Of Chiral Catalyst In Asymmetric Reactions." Phd thesis, METU, 2005. http://etd.lib.metu.edu.tr/upload/2/12606192/index.pdf.

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The synthetic strategy of this study mainly depends upon the asymmetric desymmetrization of meso norbornene type an anhydride. Asymmetric desymmetrization was achieved by using chinchona alkaloids under kinetically controlled conditions. The resultant mono ester carboxylic acid was epimerized to trans configuration. Subsequent esterification followed by lithium aluminum hydride reduction afforded the first chiral diol ligand with 98 % ee. Transformation of diol to corresponding trans diamine was achieved via Mitsunobu-Gabriel combination. The resultant diamine was first transformed into salen

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29

El, Asaad Bilal. "Synthesis of Optically Pure Nitrogenated Ligands and their uses in Asymmetric Catalysis." Thesis, Lyon, 2017. http://www.theses.fr/2017LYSE1119/document.

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Des nouveaux ligands chiraux diamine N-aromatiques, dérivés de 1,2-diaminocyclohexane et des a et ß- cétones cycliques aromatiques, ont été synthétisés par alkylation-déshydrogénation catalysée par le palladium sur charbon (Pd/C). Cette méthode, nous a permis de préparer un série des ligands chiraux de types N,N-di-aryles diamine and N-aryle diamine avec de très bons rendements isolés.Premièrement, les efficacités des ligands synthétisés ont été examinées avec succès dans la réaction de réduction par transfert d'hydrure des cétones aromatiques, catalysée avec des catalyseurs homogènes d'iridiu

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30

Milbéo, Pierre. "Synthèse de bicycles contraints originaux pour l’élaboration de nouveaux catalyseurs chiraux et de nouveaux foldamères." Thesis, Montpellier, 2017. http://www.theses.fr/2017MONTT209.

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Les travaux présentés dans cette thèse ont eu pour objectif la valorisation d’une structures bicyclique bifonctionnelle à géométrie contrainte, celle de l’acide 2-aminobicyclo[2.2.2]octane 1-carboxylique (ABOC). La contrainte conformationnelle est une caractéristique particulièrement recherchée dans la conception d’agent chiraux pour la synthèse asymétrique ainsi que dans la synthèse de macromolécules se structurant spontanément (foldamères). Un travail sur la synthèse de petits peptides incorporant le (R) ou (S)-ABOC, a dans un premier temps conduit à l’identification d’un nouvel organocataly

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31

Topping, Chris Mark. "Design and synthesis of chiral ligands for copper catalysed asymmetric synthesis." Thesis, University of Hull, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.301496.

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32

Silva, Fortes Antonio Belmiro Gil da. "Synthesis and applications of chiral phosphine ligands to catalytic asymmetric hydrogenation." Thesis, University of Liverpool, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.359177.

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33

Shintani, Ryo 1976. "Applications of planar-chiral phosphaferrocene-oxazolines in asymmetric catalysis and enantioselective desymmetrization by carbon nucleophiles in the presence of chiral ligands." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/30019.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, 2003.<br>Includes bibliographical references.<br>In PART I, the design and the synthesis of planar-chiral phosphaferrocene-oxazolines, a new class of P,N-ligands, are described. The modular nature of their structure allows easy access to a number of analogues in enantiomerically pure forms, facilitating the easy tunability of the chiral environment. These ligands are then applied to several transition metal-catalyzed asymmetric reactions. In Pd-catalyzed asymmetric allylic alkylations, it is established that the planar

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34

Narui, Rintaro. "Design and Synthesis of (S)-Phenylalanine-Derived Chiral Phosphorus-Olefin Ligands and Their Use in Asymmetric Catalysis." 京都大学 (Kyoto University), 2012. http://hdl.handle.net/2433/158097.

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35

Dennis, Michael Robert. "Synthesis of 3- and 3,3'- substituted 1,1'-bi-2-naphthol derivatives via carbamates and their use as ligands in asymmetric catalysis." Thesis, University of Hull, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.322448.

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36

Fernández, Mateos Emilio. "New methodologies for the catalytic enantioselective addition of organometallic reagents to carbonyl compounds." Doctoral thesis, Universidad de Alicante, 2015. http://hdl.handle.net/10045/50227.

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37

Pinho, Pedro. "Development and application of new chiral -amino alcohols in synthesis and catalysis : Use of 2-azanorboryl-3-methanols as common intermediates in synthesis and catalysis." Doctoral thesis, Uppsala universitet, Kemiska institutionen, 2001. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-1267.

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The development and application of unnatural amino alcohols,prepared via hetero-Diels-Alder reactions,in synthesis and catalysis is described.The studies are concerned with the [i]scope of the hetero-Diels-Alder reaction and preparation of important intermediates in the synthesis of antiviral agents,[ii ]application of amino alcohols in the ruthenium transfer hydrogenation of ketones,[iii ]use of similar precursors in the in situ generation of oxazaborolidines for reduction of ketones,and [iv] development and application of new chiral auxiliaries for dialkylzinc additions to activated imines,

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38

Salomon, Christine. "Nouvelle synthèse stéréosélective de diphosphines à pont méthano P-stéréogéniques : applications en catalyse asymétrique et pour la préparation de clusters ou de polymères de coordination chiraux." Thesis, Dijon, 2010. http://www.theses.fr/2010DIJOS010/document.

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Ce mémoire porte sur la synthèse asymétrique de ligands à pont méthano P-stéréogénique, ainsi que sur leurs applications en catalyse asymétrique, en chimie de coordination et pour la préparation de polymères de coordination avec des métaux de transition. Les diphosphines P-stéréogéniques sont synthétisées par création d'une liaison phosphore-carbone au niveau du pont méthano, à partir d'un anion formé en position α d'une méthylphosphines borane. Plusieurs stratégies ont été étudiées selon que l'électrophile est un complexe d’oxazaphospholidine borane, un phosphinite borane ou une chlorophosphi

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39

Gayet, Arnaud. "Development of New Chiral Bicyclic Ligands : Applications in Catalytic Asymmetric Transfer Hydrogenation, Epoxidations, and Epoxide Rearrangements." Doctoral thesis, Uppsala University, Organic Chemistry, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-4753.

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<p>This thesis describes the synthesis and application of new chiral bicyclic ligands and their application in asymmetric catalysis. The studies involved: [i] The development of novel chiral bicyclic amino sulfur ligands and their use in transfer hydrogenation. [ii] The development of the kinetic resolution of racemic epoxide through the use of chiral lithium amides. [iii] The synthesis and application of chiral bicyclic amine in the organocatalysed epoxidation of alkenes. [iv] Development and application of new chiral diamine ligands in the rearrangement of epoxides into allylic alcohols.</p>

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40

Aydin, Juhanes. "Novel Pincer Complex-Catalyzed Transformations : Including Asymmetric Catalysis." Doctoral thesis, Stockholms universitet, Institutionen för organisk kemi, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-8524.

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This thesis is focused on the development of new pincer complex-catalyzed transformations. Optimization of the catalytic properties (fine-tuning) was directed to increase the catalytic activity as well as the chemo-, stereo- and enantioselectivity of the complexes. This was achieved by varying the heteroatoms in the terdentate pincer ligand, by changing the electronic properties of the coordinated aryl moiety and by implementing chiral functionalities in the pincer complexes. In the cross-coupling reaction of vinyl epoxides and aziridines with organoboronic acids the chemoselectivity of the re

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41

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.

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42

Frölander, Anders. "Impact of Secondary Interactions in Asymmetric Catalysis." Doctoral thesis, KTH, Organisk kemi, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4380.

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This thesis deals with secondary interactions in asymmetric catalysis and their impact on the outcome of catalytic reactions. The first part revolves around the metal-catalyzed asymmetric allylic alkylation reaction and how interactions within the catalyst affect the stereochemistry. An OH–Pd hydrogen bond in Pd(0)–π-olefin complexes of hydroxy-containing oxazoline ligands was identified by density functional theory computations and helped to rationalize the contrasting results obtained employing hydroxy- and methoxy-containing ligands in the catalytic reaction. This type of hydrogen bond was

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43

Panchal, Ketan. "Application of asymmetric C-H activation to the synthesis of planar chiral catalysts and ligands." Thesis, University of East Anglia, 2014. https://ueaeprints.uea.ac.uk/53358/.

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The synthesis and application of ferrocene-based palladacycles has been at the forefront of catalysis for a number of years. The use of C-H activation to synthesise such compounds has been a relatively new development. The work within this thesis attempts to develop on known protocols devised by Richards et al. for the generation of enantio-enriched planar chiral palladacycles. The first of which includes the synthesis and application of symmetrical and non-symmetrical phosphines, and in this work the latter have been transformed into a diastereomerically pure enantiomerically enriched pallada

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44

Zalubovskis, Raivis. "Flexibility – a tool for chirality control in asymmetric catalysis." Doctoral thesis, KTH, Kemi, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4166.

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This thesis deals with the design and synthesis of ligands for asymmetric catalysis: palladium catalyzed allylic alkylations, and rho-dium and iridium catalyzed hydrogenations of olefins. Chirally flexible phosphepine ligands based on biphenyl were synthesized and their properties were studied. The rotation barrier for configurationally flexible phosphepines was determined by NMR spectroscopy. The ratio of the atropisomers was shown to depend on the group bound to phosphorus. Only complexes with two homochiral ligands bound to the metal center were observed upon complexation with Rh(I). It was

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45

Trifonova, Anna. "Synthesis of Novel Chiral Bicyclic Ligands and their Application in Iridium-Catalyzed Reactions." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-5783.

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46

Passays, Johan. "Nouveaux ligands mixtes de type phosphore / carbène N-hétérocyclique : synthèse et applications en catalyse asymétrique." Thesis, Rouen, INSA, 2011. http://www.theses.fr/2011ISAM0008.

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Une méthode simple et efficace a été développée pour la préparation de ligands bifonctionnels associant les motifs phosphine ou phosphite d'une part, et carbène Nhétérocyclique(NHC) ou imidazolium d'autre part. Dans un premier temps, une série de ligands diphénylphosphine-carbène chiraux portant un centre stéréogène en a de la phosphinea été développée à partir b-hydroxyesters. Une famille de ligands a ainsi été développée afin d'évaluer l'influence de l'encombrement stérique de différents groupements alkyles en a de la phosphine et de la nature des groupements aromatiques portés sur l'imidazo

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47

Racys, Daugirdas. "Synthesis of multifunctional ensembles for asymmetric catalysis and chiral recognition : investigation of palladium-trost ligand complexes." Thesis, University of Bristol, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.680110.

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The palladium complex 1, bearing the Trost 'Standard' Ligandi (TSL) 2 is an efficient and highly selective catalyst used to facilitate asymmetric allylic alkylation. Earlier research conducted by Lloyd Jones and co-workers suggested that the selectivity of the catalyst 1 monomeric species may arise via ligand-accelerated catalysis pathway. TSL 2 has a degree of flexibility that is crucial for the selectivity, but also responsible for the rapid equilibrium of the Pd-TSL monomers 1 with the low selectivity and diminished activity oligomers (I)n. The oligomers (I)n are known to be the dominant ca

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48

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.

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49

Stranne, Robert. "Investigation of Symmetry and Electronic Effects in Asymmetric Palladium-Catalysed Allylic Substitutions." Doctoral thesis, KTH, Chemistry, 2001. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-3283.

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50

Gayet, Arnaud. "Development of new chiral bicyclic ligands : applications in catalytic asymmetric transfer hydrogenations, epoxidations, and epoxide rearrangements /." Uppsala : Acta Universitatis Upsaliensis: Univ.-bibl. [distributör], 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-4753.

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