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Dissertations / Theses on the topic 'Transfer hydrogenation'

Author: Grafiati

Published: 4 June 2021

Last updated: 15 March 2025

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1

Feng, Wu Xiao. "Asymmetric Transfer Hydrogenation & Transfer Hydrogenation in Water." Thesis, University of Liverpool, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.486307.

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Asymmetric transfer hydrogenation (ATH) has emerged as a practical, powerful alternative to asymmetric hydrogenation for the production of chiral alcohols, one of the most valuable intermediates in the synthesis of pharmaceuticals, flavour, aroma and agricultural chemicals, and speciality materials. However, the application of ATH has been hampered by its low TONs and TOFs in the past. On the other hand, enabling catalysis in water contributes to one of the most important and challenging fields of modem chemistry, green synthesis. As a solvent for organic reactions, water bears a number of att

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2

Quan, Xu. "Hydrogenation, Transfer Hydrogenation and Hydrogen Transfer Reactions Catalyzed by Iridium Complexes." Doctoral thesis, Stockholms universitet, Institutionen för organisk kemi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-119701.

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The work described in this thesis is focused on the development of new bidentate iridium complexes and their applications in the asymmetric reduction of olefins, ketones and imines. Three new types of iridium complexes were synthesized, which included pyridine derived chiral N,P-iridium complexes, achiral NHC complexes and chiral NHC-phosphine complexes. A study of their catalytic applications demonstrated a high efficiency of the N,P-iridium complexes for asymmetric hydrogenation of olefins, with good enantioselectivity. The carbene complexes were found to be very efficient hydrogen transfer

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3

Wang, Chao. "Transfer hydrogenation of imino bonds." Thesis, University of Liverpool, 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.539585.

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4

Shingote, S. K. "Studies in catalytic transfer hydrogenation reactions." Thesis(Ph.D.), CSIR-National Chemical Laboratory, Pune, 2012. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/2122.

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5

Peach, Philip James. "Enantioselective transfer hydrogenation of novel substrates with emphasis on the dynamic kinetic resolution : transfer hydrogenation of cyclic ketones." Thesis, University of Warwick, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.397260.

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6

Shermer, Duncan J. "Sequential reactions involving catalytic transfer hydrogenation technology." Thesis, University of Bath, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.432384.

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7

Ji, Xiaolong. "Hydrogen storage in dibenzyltoluene via catalytic hydrogenation and its conveyance towards acetone through transfer hydrogenation." Electronic Thesis or Diss., Lyon 1, 2024. http://www.theses.fr/2024LYO10294.

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Cette thèse est orientée vers l'objectif d'obtenir une compréhension approfondie du stockage d'hydrogène dans les liquides organiques porteurs d'hydrogène (LOHC) via a) l'hydrogénation catalytique hétérogène et b) une alternative de l'utilisation de l'hydrogène stocké, avec la réaction d'hydrogénation par transfert reliant les LOHC et l'acétone. L'hydrogène peut être efficacement stocké dans les LOHC via l'hydrogénation et finalement restitué sous forme moléculaire par la déshydrogénation des composés riches en hydrogène. Le mélange commercial des isomères de dibenzyltoluène et benzylbenzyltol

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8

Cross, David J. "Asymmetric transfer hydrogenation reactions using Rh(III) catalysts." Thesis, University of Warwick, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.403114.

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9

Parekh, Vimal. "Asymmetric transfer hydrogenation reductions using tethered ruthenium (II) catalysts." Thesis, University of Warwick, 2011. http://wrap.warwick.ac.uk/45754/.

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By asymmetric transfer hydrogenation, substituted quinolines, which are generally regarded as challenging substrates for reduction, were successfully converted into tetrahydroquinolines using "tethered" Ru(II) and "tethered" Rh(III) complexes in formic acid/triethylamine. An ether-linked "tethered" catalyst was successfully synthesized through a sequence that avoids the use of a Birch reduction for the formation of a 1,4-cyclohexadiene moiety. The ether link is incorporated between the basic amine of the ligand and the η6- arene ring, giving results comparable to the alkyl-"tethered" complexes

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10

Taylor, David J. "Metal catalysed transfer hydrogenation, dehydrogenation and racemisation of amines." Thesis, University of York, 2010. http://etheses.whiterose.ac.uk/1473/.

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This thesis describes the study of the fundamental mechanisms relating to asymmetric transfer hydrogenation (ATH) of imines and the transfer dehydrogenation and racemisation of secondary amines by Cp*Rh and Cp*Ir complexes. A series of 16-electron complex of the type Cp*M(XNC6H4NX’) (where M = Rh or Ir and X, X’ = H or Ts) have been synthesised, fully characterised and demonstrated to be active catalysts for the transfer hydrogenation of imines. The crystal structures of the complexes reveal structural features that are important in understanding their unique ability to act as transfer hydroge

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11

Macfarlane, Kenneth Shawn. "Asymmetric transfer hydrogenation using a rhodium(I) IN SITU system containing Chiral Sulphoxide Ligands." Thesis, University of British Columbia, 1989. http://hdl.handle.net/2429/29471.

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This thesis describes the results from in situ catalytic rhodium(I) systems with acylated methionine sulphoxide ligands for the transfer hydrogenation of aryl alkyl ketones (eq. 1) and imines (eq. 2) from 2-propanol. All the chiral ligands studied are easily prepared derivatives of the amino acid methionine and include: N-acetyl-(S)-methionine-(R,S)-sulphoxide [(S)-AMSO], N-acetyl-(R)-methionine-(R,S)-sulphoxide [(R)-AMSO], and N-benzoyl-(S)-methionine-(R,S)-sulphoxide [(S)-BMSO]. [equation 1 omitted] [equation 2 omitted] The catalytic res

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12

Ferraro, Antonino. "Synthesis and organocatalyzed enantioselective transfer-hydrogenation of beta-amino nitroolefins." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amslaurea.unibo.it/9977/.

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The importance of the β-amino nitroalkanes is due to their high versatility allowing a straightforward entry to a variety of nitrogen-containing chiral building blocks; furthermore obtaining them in enantiopure form allows their use in the synthesis of biologically active compounds or their utilization as chiral ligands for different uses. In this work, a reaction for obtaining enantiopure β-amino nitroalkanes through asymmetric organocatalysis has been developed. The synthetic strategy adopted for the obtainment of these compounds was based on an asymmetric reduction of β-amino nitroolefins

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13

Ahlford, Katrin. "Asymmetric transfer hydrogenation of ketones : Catalyst development and mechanistic investigation." Doctoral thesis, Stockholms universitet, Institutionen för organisk kemi, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-55412.

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The development of ligands derived from natural amino acids for asymmetric transfer hydrogenation (ATH) of prochiral ketones is described herein. In the first part, reductions performed in alcoholic media are examined, where it is found that amino acid-derived hydroxamic acids and thioamides, respectively, are simple and versatile ligands that in combination with [RhCp*Cl2]2 efficiently catalyze this particular transformation. Selectivities up to 97% ee of the corresponding secondary alcohols are obtained, and it is furthermore observed that the two different ligand classes, albeit based on th

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14

Dasgupta, Debalina. "Ambient pressure hydrogenation of alpha-methylstyrene using hydrogen transfer agent /." Available to subscribers only, 2005. http://proquest.umi.com/pqdweb?did=1075699771&sid=2&Fmt=2&clientId=1509&RQT=309&VName=PQD.

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Thesis (M.S.)--Southern Illinois University Carbondale, 2005.<br>"Department of Mechanical Engineering and Energy Processes." Includes bibliographical references (leaves 112-119). Also available online.

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15

Cheung, Fung Kei. "Stereochemically Well-Defined Ruthenium (II) TetheredCatalysts for Asymmetric Transfer Hydrogenation." Thesis, University of Warwick, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.502158.

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A series of novel ether-linked tethered catalysts were synthesised based on fJ-amino alcohol and monotosylated diamine. This type of catalysts allow modifications of the chiral space in the region of the transition state which lies below the Ru-H bond, without destroying the diastereoselectivity observed for the formation of Ru-Hydride from the 16 electron intermediate. This modification is hoped to increase the sensitivity towards unsymmetrical dialkyl ketone reductions. A 4-methyl analogue of the recently developed reverse tethered catalyst was synthesised where the tether chain is incorpora

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16

Hannedouche, JeÌroÌ‚me. "New ruthenium(II) catalysts for asymmetric transfer hydrogenation of ketones." Thesis, University of Warwick, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.406812.

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17

ELHUSSIEN, HUSSIEN Eldod. "NON- CATALYTIC TRANSFER HYDROGENATION IN SUPERCRITICAL CO2 FOR COAL LIQUEFACTION." OpenSIUC, 2014. https://opensiuc.lib.siu.edu/theses/1409.

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This thesis presents the results of the investigation on developing and evaluating a low temperature (<150oC) non - catalytic process using a hydrogen transfer agent (instead of molecu-lar hydrogen) for coal dissolution in supercritical CO2. The main idea behind the thesis was that one hydrogen atom from water and one hydrogen atom from the hydrogen transfer agent (HTA) were used to hydrogenate the coal. The products of coal dissolution were non-polar and polar while the supercritical CO2, which enhanced the rates of hydrogenation and dissolution of the non-polar molecules and removal from th

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18

Javle, B. R. "Synthesis of amino acid amide based ionic liquids: their utilization in asymmetric transfer hydrogenation." Thesis(Ph.D.), CSIR-National Chemical Laboratory Pune-411008, 2018. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/4581.

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19

Roth, Peter. "Asymmetric transfer hydrogenation of aromatic ketones and azirines with NH-ligands." Doctoral thesis, Uppsala University, Organic Chemistry, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-2679.

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<p>The Ru(arene)[(1<i>S</i>, 3<i>R</i>, 4<i>R</i>)-3-(Hydroxymethyl)-2-azabicyclo[2.2.1]heptane catalyst was optimized as ligand in the asymmetric transfer hydrogenation of ketones and resulted in increased activity and enantioselectivity of the catalyst. Dioxolane substitution at the rear end of the amino alcohol ligand and introduction of a (<i>R</i>)-methyl substituent yielded a catalyst that reduced acetophenone in 96% enantiomeric excess in 90 minutes with a substrate to catalyst molar ratio of 5000. A diversity of substituted aromatic ketones was reduced with excellent rate and enantiose

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20

Grace, Jake. "The Rh catalysed asymmetric transfer hydrogenation of imines; a mechanistic study." Thesis, University of York, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.485090.

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In a study of the mechanism of Catalytic Asymmetric Transfer Hydrogenation (CATHy), we report the synthesis and characterisation of the monotosylated diamine. ligands (R,R and S,S)-p-fluorobenzenesulfonyl-l,2diphenylethylenediamine (FsDPEN) and (R,R and S,S)-p-lbutylbenzenesulfonyll, 2-diphenylethylenediamine (BusDPEN) and the corresponding Cp*Rh .complexes Cp*RhO(TsNCHPhCHPh.NH2) (i), Cp*RhO(FsNCHPhCHPhNlli) (2) and Cp*RhCI(BusNGIPhCHPhNlU) (3). (1) has been shown to react with NaOMe to form Cp*Rh(H)(TsNCH:I'hCHPhNH2) (5) as the)najor product,.as evidenced by NMR spectroscopy, and also a smal

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21

Cheng, Xiaohui. "Transition metal catalysed homogeneous hydroamination, allylic substitution and transfer hydrogenation reactions." Thesis, King's College London (University of London), 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.410013.

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22

Sun, Xiuyan. "Studies of catalytic asymmetric transfer hydrogenation in batch and continuous reactors." Thesis, University College London (University of London), 2008. http://discovery.ucl.ac.uk/1446201/.

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The aim of this work was to design novel reactors to increase the reaction conversion and enantioselectivity for the asymmetric transfer hydrogenation (ATH) of acetophenone. The reactor designs should also be amenable to scale-out for increase of productivity. Asymmetric transfer hydrogenation of acetophenone with isopropanol is a reversible reaction and backwards reaction limits the reaction conversion and enantioslectivity. Novel reactor design aims to efficient acetone removal, which is a byproduct in the reaction system. By gas stripping, reaction equilibrium can be shifted and hence conve

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23

Thorpe, Tim. "Synthesis of polar aminosulfonamide ligands and their application in enantioselective transfer hydrogenation." Thesis, University of Bath, 2002. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.760806.

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24

Kotze, Hendrik de Vries. "Immobilized Ru(II) catalysts for transfer hydrogenation and oxidative alkene cleavage reactions." Thesis, Stellenbosch : Stellenbosch University, 2015. http://hdl.handle.net/10019.1/96593.

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Thesis (PhD)--Stellenbosch University, 2015.<br>ENGLISH ABSTRACT: The synthesis of a range of siloxane functionalized Ru(arene)Cl(N,N) complexes allowing for the synthesis of novel MCM-41 and SBA-15 immobilized ruthenium(II) catalysts, is described in this thesis. Two distinctly different approaches were envisaged to achieve successful heterogenization of these siloxane functionalized complexes. Condensation of the siloxane functionalized complexes, C2.4-C2.6 (siloxane tether attached to imine nitrogen) and C3.5-C3.7 (siloxane tether via the arene ring), with the surface silanols of the s

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25

Ahmadi, Sara. "Exploring Simple Catalyst for Transfer Hydrogenation of Ketones and Photocatalytic Hydrogen Production Using Homogeneous Metal Complexes." Thesis, Université d'Ottawa / University of Ottawa, 2019. http://hdl.handle.net/10393/39622.

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Transfer hydrogenation has been recognized to be an important synthetic method in both academic and industrial research to obtain valuable products including alcohols. Transition metal catalysts based on precious metals, such as Ru, Rh and Ir, are typically employed for this process. This thesis starts with a study on the potential of an Fe based complex carrying a PNP ligand (2,6-{Ph2PNH}2(NC5H3)) to function as an active transfer hydrogenation catalyst for the conversion of ketones to alcohols. During the analysis of the performance parameters of this potential catalyst, it was discovered t

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26

Wilson, Gleason. "Hydrogen Transfer Reaction Involving Nickel POCOP-Pincer Hydride Complexes." University of Cincinnati / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1447688935.

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27

Hayes, Aidan Michael. "The synthesis and evaluation of new ruthenium(II) catalysts for asymmetric transfer hydrogenation." Thesis, University of Warwick, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.479287.

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28

Wu, Jianjun. "From transfer hydrogenation to transamination : new methods for the preparation of N-heterocycles." Thesis, University of Liverpool, 2013. http://livrepository.liverpool.ac.uk/17713/.

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Reduction of N-heteroaromatic compounds is a challenging and important reaction. Transfer hydrogenation using organic molecules as hydrogen donors is a safe and operationally simple alternative to hydrogenation with H2. However, it has been underutilised and less developed. In this thesis, our contribution to the transfer hydrogenation of N-heteroaromatic compounds is described. Following a brief introduction of transfer hydrogenation of N-heteroaromatic compounds in Chapter 1, Chapter 2 presents a novel method for the mild reduction of quinolines, isoquinolines and quinoxalines to correspondi

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29

Hasan, Tanvir. "NON-CATALYTIC TRANSFER HYDROGENATION IN SUPERCRITICAL CO2 FOR COAL LIQUEFACTION AND GRAPHENE EXTRACTION." OpenSIUC, 2015. https://opensiuc.lib.siu.edu/theses/1742.

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The paper discusses a two-step process for the simultaneous extraction of graphene quantum dots and chemicals. The two steps are sequential structure disruption by supercritical CO2 explosion followed by a low temperature (120oC), non-catalytic transfer hydrogenation in supercritical CO2. The key idea of this research is, one hydrogen atom from hydrogen transfer agent (HTA) one hydrogen atom from water is used to hydrogenate the coal. The use of supercritical CO2 enhances the rate of hydrogenation, helps in dissolution of non-polar molecules and removal from the reaction site. The coal dissol

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30

Parambadath, S. "Heterogenized nitrogen containing metal complexes over SBA-15 for asymmetric transfer hydrogenation reaction." Thesis(Ph.D.), CSIR-National Chemical Laboratory, Pune, 2008. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/2683.

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31

Melis, Diana. "Quinoline-triazole half-sandwich iridium(III) complexes: Synthesis, antiplasmodial activity and preliminary transfer hydrogenation studies." Master's thesis, Faculty of Science, 2020. http://hdl.handle.net/11427/32414.

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Malaria is a devastating and pervasive infectious disease and continues to be a major global health issue, with over half the world's population being at risk of transmission. In the absence of a suitable vaccine, efforts to eradicate the disease rely heavily on clinically available drugs. Plasmodium falciparum, the deadliest species of malaria, has however become resistant to most conventional antimalarial treatments, resulting in the worldwide search for new, effective drugs. Amongst other requirements, these drugs should target resistant parasitic strains in an attempt to curb the escalatio

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32

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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33

Seashore-Ludlow, Brinton. "New Methods for the Synthesis of Vicinal Stereocenters : Palladium-Catalyzed Domino Reactions and Asymmetric Transfer Hydrogenation." Doctoral thesis, KTH, Organisk kemi, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-95327.

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In this thesis the synthesis of vicinal stereocenters is investigated in two distinct contexts, namely the construction of 3,3-disubstituted oxindoles and the synthesis of b-hydroxy-a-amino acids. Both scaffolds are prevalent in a range of natural products and biologically relevant compounds and, therefore, methods for their synthesis are of great import. First, the construction of 3,3-disubstituted oxindoles using palladium-catalyzed domino reactions is described. This covers two stereospecific methods for the construction of the desired oxindoles based on domino carbopalladation sequences.

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34

Dimroth, Jonas [Verfasser], and Reinhard [Akademischer Betreuer] Schomäcker. "Immobilization of Catalysts for the Asymmetric Transfer Hydrogenation of Aryl Ketones / Jonas Dimroth. Betreuer: Reinhard Schomäcker." Berlin : Universitätsbibliothek der Technischen Universität Berlin, 2011. http://d-nb.info/1016533470/34.

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35

Lucas, Stephanie Jayne. "The synthesis of group 9 complexes for use as transfer hydrogenation catalysts and anti-cancer agents." Thesis, University of Leeds, 2013. http://etheses.whiterose.ac.uk/4441/.

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This thesis concerns the synthesis of group 9 Cp* and hydroxyl tethered Cp* based complexes for their use as both anti-cancer agents and transfer hydrogenation catalysts. The successful catalysts were immobilised covalently onto Wang resin for their use as recyclable transfer hydrogenation catalysts in the reduction of benzaldehyde and acetophenone. Chapter 1 is a current review of transfer hydrogenation using metal-arene complexes and immobilised catalysts. Chapter 2 describes the synthesis and characterisation of group 9 hydroxyl tethered Cp* based dihalide dimers. Chapter 3 describes the sy

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36

Bizet, Vincent. "Synthèses énantiosélectives de composés trifluorométhylés via l’étude de la réaction d’isomérisation rédox d’alcools allyliques trifluorométhylés." Thesis, Rouen, INSA, 2012. http://www.theses.fr/2012ISAM0016.

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Ce travail traite de la synthèse énantiosélective de composés trifluorométhylés via l’étude de la réaction d’isomérisation rédox d’alcools allyliques trifluorométhylés catalysée par des complexes de ruthénium. Nous avons mis au point la réaction d’isomérisation rédox d’alcools allyliques secondaires β-trifluorométhylés. Une étude du mécanistique réactionnel a mis en évidence que l’étape cinétiquement déterminante de cette réaction pour les substrats β-trifluorométhylés est différente de celle décrite pour les substrats non fluorés, il s’agit de l’étape d’insertion. Cette observation nous a per

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37

Canciani, Andrea. "Effect of ZrO2 phases in the Catalytic Transfer Hydrogenation of Methyl Levulinate: a computational and experimental study." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/24377/.

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The Levulinic Acid (LA) and its esters like Methyl Levulinate (ML) are promising bio-derived molecules and their study is a crucial step in the development of a new and greener chemical industry. Among the possible product derived from their transformation, there is the γ-Valerolactone (GVL), which is itself a platform molecule but even a promising biofuel. For several reasons, the Catalytic Transfer Hydrogenation (CTH) process is gaining more and more interest, representing a desirable route to produce GVL. The CTH is a Lewis acid-catalyzed reaction, therefore cheap materials with acid proper

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38

Madern, Nathalie. "Design of artificial metalloenzymes by functional mutation of Papain : application to asymmetric transfer hydrogenation in aqueous media." Paris 6, 2013. http://www.theses.fr/2013PA066354.

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We designed and prepared artificial metalloenzymes for asymmetric transfer hydrogenation of ketones by covalent anchoring of [Cp*Rh(diimine)Cl]Cl complexes (Cp* = pentamethylcyclopentadienyl) to the cysteine endoproteinase papain. Papain was chosen as protein host because its active site consists in a large pocket of 25 Å long by 15 Å wide including a cysteine (Cys25) carrying a highly nucleophilic thiol function. Preliminary catalytic studies with the model complex [Cp*Rh(dpa)Cl]Cl (dpa = 2,2’-dipyridylamine) enabled to delineate the optimal experimental conditions for the transfer hydrogenat

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Mendonca, Paul. "The development of novel enantiomerically pure ligands for use in the asymmetric catalytic transfer hydrogenation of ketones." Thesis, University of Bath, 2001. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.341683.

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40

Zhan, Xiaotong. "Heterogeneous catalysis in microreactors : study of the performance of various supports." Thesis, Ecole centrale de Marseille, 2018. http://www.theses.fr/2018ECDM0007/document.

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Cette étude présente la préparation et l’évaluation de l’activité d’un nouveau catalyseur monolithique en microréacteur. La réaction d’hydrogénation du p-nitrophénol par transfert d’hydrogène avec l’acide formique a été choisie comme réaction modèle pour comparer les performances du monolithe à celles d’un catalyseur commercial en lit fixe.Cette thèse comporte une partie expérimentale importante. D’un côté, un montage expérimental et des protocoles d’analyse en ligne ont été mis au point pour faire une étude quantitative précise de la réaction modèle. De l’autre côté, les conditions de prépara

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41

Owston, Nathan Ashley. "Novel transition metal-catalysed syntheses of carboxylic acid derivatives." Thesis, University of Bath, 2008. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.512253.

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This thesis describes the chemistry developed during a study of novel transition metalcatalysed reactions for the synthesis of carboxylic acid derivatives. Chapter 2 describes a novel protocol for the synthesis of primary amides from alcohols in one-pot where a metal complex mediates two fundamentally different catalytic processes. An iridium catalyst has been shown to be effective for the selective rearrangement of aldoximes into primary amides. In addition, an iridium-catalysed oxidation of activated alcohols via hydrogen transfer has been developed using an alkene as formal oxidant. These r

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42

Yamani, Khalil. "Réduction de difluorocyclopropènes par transfert d'hydrogène. Synthèse de difluorocyclopropanes optiquement enrichis." Thesis, Université Paris sciences et lettres, 2020. http://www.theses.fr/2020UPSLS024.

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Les gem-difluorocyclopropanes sont rencontrés dans des produits bioactifs et suscitent un intérêt croissant en chimie médicinale. Des réactions diastéréo sélectives, contrôlées par le substrat ou par des auxiliaires chiraux, ainsi que des réactions enzymatiques ont été traditionnellement utilisées pour accéder à des gem-difluorocyclopropanes optiquement enrichis. Le développement de méthodes de synthèse énantiosélectives catalytiques de gem-difluorocyclopropanes fonctionnalisés constitue donc un défi important. Dans ce contexte, nos travaux ont porté sur la mise au point d’une méthode de réduc

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43

Ropic, Melanie. "Kinetic studies of asymmetric transfer hydrogenation of 1-Methyl-6,7-dimethoxy-3,4-dihydroisoquinoline using in-situ FTIR spectroscopy." Thesis, University of Hull, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.479148.

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44

Mphahlele, Mamabolo Geoff. "Evaluation of mass transfer in a catalytic distillation column using hydrogenation of 1 -hexene as a test reaction." Master's thesis, University of Cape Town, 2003. http://hdl.handle.net/11427/6083.

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Bibliography: leaves 101-108.<br>The aim of this project is to evaluate experimentally the overall vapour/liquid mass transfer coefficient, and to develop a simple model for evaluating the effect of chemical reaction on the overall vapour/liquid mass transfer coefficient.

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Geburtig, Denise [Verfasser], Peter [Akademischer Betreuer] Wasserscheid, and Peter [Gutachter] Wasserscheid. "Transfer hydrogenation using Liquid Organic Hydrogen Carrier systems as hydrogen source / Denise Geburtig ; Gutachter: Peter Wasserscheid ; Betreuer: Peter Wasserscheid." Erlangen : Friedrich-Alexander-Universität Erlangen-Nürnberg (FAU), 2019. http://d-nb.info/1198486465/34.

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Stridfeldt, Elin. "Amino Alcohols from Asymmetric Transfer Hydrogenation of α-Amido-β-Keto Esters Possessing Olefins: Formal Total Synthesis of Sphingosine". Thesis, KTH, Skolan för kemivetenskap (CHE), 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-156316.

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In this thesis a methodology to synthesize anti-β-hydroxy-α-amino esters possessing olefins has been investigated. The developed procedures originate from two already established procedures in which α-amido-β-keto esters, which do not contain olefins, has been stereoselectively reduced to the corresponding anti-β-hydroxy-α-amino alcohols via asymmetric transfer hydrogenation coupled with dynamic kinetic resolution. Both established methods, one solvent free and one emulsion procedure, have been investigated on the expanded substrate scoop. Four different α-amido-β-keto ester containing olefins

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Grazia, Lorenzo <1990&gt. "Exploring the gas-phase catalytic transfer hydrogenation as a tool for the production of fuels and chemicals from renewables." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2018. http://amsdottorato.unibo.it/8434/1/Grazia_Lorenzo_tesi.pdf.

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Over the past decade, great efforts have been devoted in the field of biomass valorization to the development of reductive processes for the sustainable production of bio-fuel and chemicals. Catalytic transfer hydrogenation, which uses alcohols as the hydrogen source, offers an interesting approach that avoids the use of both high H2 pressure and precious metal catalysts. In this work, the vapour-phase production of furfuryl alcohol (FAL) and 2-methylfuran (MF) from biomass-derived furfural (FU), using methanol as the H-transfer agent was studied. Two class of catalysts were employed: basic-ba

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Ortayli, Oytun. "Asymmetric Synthesis Of 1,4-diamine Based Chiral Ligand And Organocatalyst And Their Applications." Master's thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12612335/index.pdf.

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Novel 1,4-chiral diamine ligand possessing a trans-9,10-dihydro-9,10-ethanoanthracene backbone was synthesized. The synthetic plan involves first LiAlH4 reduction of the Diels-Alder adduct obtained by reaction of dimenthyl fumarate and anthracene, which is followed by reacting the corresponding alcohol and subsequent attachment of mesylate and triflate units to get good leaving groups which are available substances for introducing nitrogen units via SN2 type reactions. Consequently, by using dimesyl ester and ditriflate esters five catalysts 27, 29, 30, 33 and 38 were synthesized. The first fo

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Åberg, Jenny B. "Mechanistic Studies on Ruthenium-Catalyzed Hydrogen Transfer Reactions." Doctoral thesis, Stockholms universitet, Institutionen för organisk kemi, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-27596.

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Mechanistic studies on three different ruthenium-based catalysts have been performed. The catalysts have in common that they have been employed in hydrogen transfer reactions involving alcohols and ketones, amines and imines or both. Bäckvall’s catalyst, η5-(Ph5C5)Ru(CO)2Cl, finds its application as racemization catalyst in dynamic kinetic resolution, where racemic alcohols are converted to enantiopure acetates in high yields. The mechanism of the racemization has been investigated and both alkoxide and alkoxyacyl intermediates have been characterized by NMR spectroscopy and in situ FT-IR meas

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Zhou, Shuzhen. "Compact photocatalytic reactors for water treatment : mass and photon transfer issues." Thesis, Lyon 1, 2014. http://www.theses.fr/2014LYO10331.

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Le but de ce travail est de concevoir, opérer et caractériser un réacteur photo-catalytique compact qui opère en régime non limité par le transfert de matière et le transfert de la lumière. Plus particulièrement, il s'agit de traiter de l'eau polluée par un principe pharmaceutique, le diclofénac (DCF) dans un pilote à l'échelle du laboratoire et, essentiellement, de fournir les données quantitatives pour le dimensionnement d'un pilote industriel. La fabrication du dépôt du photocatalyseur TiO2, la désactivation, les transferts interne et externe de matière et l'extinction lumineuse dans la cou

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