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Dissertations / Theses on the topic 'Epoxide ring opening by amines'

Author: Grafiati

Published: 9 March 2023

Last updated: 31 July 2025

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1

Miceli, Claudia. "Aminotriphenolate complexes for effective epoxide activation." Doctoral thesis, Università degli studi di Padova, 2017. http://hdl.handle.net/11577/3424731.

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This thesis focuses on the synthesis of vanadium(V) and molybdnenum(VI) aminotriphenolate complexes VO(Ld,h,q,r), MoO(Lc)(TU), MoO(Lc)(U), Al(Lq,r,s)(DMF) and their use in activation of epoxides in ring opening reactions by amines and CO2 cycloadditions. Triphenolamines have been chosen as ligands because of their high versatility in metal complexation and the possibility of functionalization. Indeed, it will be pointed out that according to the metal employed and the different ligand substitutions, aminotriphenolate complexes exert a preferential activity towards a specific reaction or substr

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2

Deshpande, Nitish. "Catalytic Material Design: Design Factors Affecting Catalyst Performance for Biomass and FineChemical Applications." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu154273906480973.

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3

Green, Dale. "A probabilistic approach to reaction coordinate and rate constant modeling applied to epoxide ring-opening reactions." Kansas State University, 2012. http://hdl.handle.net/2097/15085.

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Master of Science<br>Department of Chemical Engineering<br>Keith Hohn<br>The study will utilize a probabilistic reaction modeling method for ring-opening reactions of epoxide. In particular, to elucidate the reaction mechanism by the methods presented, focus will be placed on the nucleophillic attack of ethylene oxide by ammonia and its anion. This focus was chosen because of the potential to gain significant advantage in computational intensity required to model the epoxy-amino macromolecular curing reactions and resulting thermochemical and physical properties of the cured resin. The method

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4

Townsend, Michael Arthur Edward. "A Computational Investigation of the Biosynthesis of Lanosterol." Thesis, University of Canterbury. Chemistry, 2006. http://hdl.handle.net/10092/1329.

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The biosynthesis of the steroid precursor molecule lanosterol is a remarkable process in which the enzyme-bound substrate 2,3-S-oxidosqualene forms four new carbocyclic rings by a cascade of cation-alkene addition reactions, followed by a series of 1,2-methyl and hydride shifts. The work presented in this thesis is a computational study of the reactions of compounds designed to model the oxidosqualene-lanosterol cyclisation in order to establish details of the mechanism of this amazing cyclisation. The initiation of oxidosqualene cyclisation has been modelled by the intermolecular reaction of

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5

Karadka, Shankara Girish [Verfasser], and Michael [Akademischer Betreuer] Grunze. "Sulfur containing biologically responsive polymers synthesized via thiol-yne/ene and thiol-epoxide ring opening polymerization / Girish Karadka Shankara ; Betreuer: Michael Grunze." Heidelberg : Universitätsbibliothek Heidelberg, 2017. http://d-nb.info/1180985354/34.

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6

Drese, Jeffrey Hayden. "The design, synthesis, and characterization of aminosilica adsorbents for CO2 capture from dilute sources." Diss., Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/42829.

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The use of novel hyperbranched aminosilica (HAS) materials created through the ring-opening polymerization of aziridine from mesoporous silica supports was proposed for the adsorption of CO2 from dilute sources. The limits of the adsorptive performance of these adsorbents were investigated via the preparation of sets of materials with a range of aminopolymer loadings on several different silica supports with different pore space characteristics. Relationships were determined between the materials' amine loadings and the CO2 adsorption performance. Adsorbents with substantial remaining pore vol

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7

Grimm, Michelle L. "Development of New N-Cyclopropyl Based Electron Transfer Probes for Cytochrome P-450 and Monoamine Oxidase Catalyzed Reactions." Diss., Virginia Tech, 2011. http://hdl.handle.net/10919/37919.

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The recent upsurge of degenerative diseases believed to be the result of oxidative stress has sparked an increased interest in utilizing the fundamental principles of physical organic chemistry to understand biological problems. Enzyme pathways can pose several experimental complications due to their complexity, therefore the small molecule probe approach can be utilized in an attempt understand the more complex enzyme mechanisms. The work described in this dissertation focuses on the use of N-cyclopropyl amines that have been used as probes to study the mechanism of monoamine oxidase (MAO) a

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8

Thevenon, Arnaud. "Homogeneous catalysts for the synthesis of oxygenated polymers." Thesis, University of Oxford, 2017. https://ora.ox.ac.uk/objects/uuid:25c312d1-11c9-4180-a62d-b87a41f521c0.

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This thesis describes the synthesis and characterisation of novel mono and dinuclear homogenous [Zn(II)] and [In(III)] metal complexes. Their applications as catalysts for CO<sub>2</sub>/epoxide or epoxide/anhydride ring opening copolymerisation and lactide ring opening polymerisation to generate polycarbonates and polyesters, respectively, are also reported. Chapter 3 reports the first indium phosphasalen catalysts for CO<sub>2</sub>/cyclohexene oxide ring opening copolymerization. The catalysts are active at 1 bar pressure of CO<sub>2</sub> and are most effective without any co-catalyst. It

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9

Long, Wei. "Designing immobilized catalysts for chemical transformations: new platforms to tune the accessibility of active sites." Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/49017.

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Chemical catalysts are divided into two traditional categories: homogeneous and heterogeneous catalysts. Although homogeneous (molecular) catalysts tend to have high activity and selectivity, their wide application is hampered by the difficulties in catalyst separation. In contrast, the vast majority of industrial scale catalysts are heterogeneous catalysts based on solid materials. Immobilized catalysts, combining the advantages of homogeneous and heterogeneous catalysts, have developed into an important field in catalysis research. This dissertation presents synthesis, characterization and e

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10

Parulkar, Aamena. "Developing Synthesis and Characterization Methods for Enhancing Material Performance." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1542739064703435.

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11

Frigell, Jens. "Synthesis of O-linked Carbasugar Analogues of Galactofuranosides and N-linked Neodisaccharides." Doctoral thesis, Stockholms universitet, Institutionen för organisk kemi, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-43561.

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In this thesis, carbohydrate mimicry is investigated through the syntheses of carbohydrate analogues and evaluation of their inhibitory effects on carbohydrate-processing enzymes. Galactofuranosides are interesting structures because they are common motifs in pathogenic microorganisms but not found in mammals. M.tuberculosis, responsible for the disease tuberculosis, has a cell wall containing a repeating unit of alternating (1→5)- and (1→6)-linked β-D-galactofuranosyl residues. Synthetic inhibitors of the enzymes involved in the biosynthesis of the cell wall could find great therapeutic use.

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12

Scalabrino, Gabrielle. "Modifications catalytiques d’huiles végétales pour des applications en matériaux polymères." Thesis, Lyon 1, 2015. http://www.theses.fr/2015LYO10304.

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Dans le cadre de cette thèse, les dérivés d’huiles végétales sont utilisés pour la synthèse de bioplastifiants bio-résistants pour le PVC d’une part et la plastification et la réticulation d’un élastomère d’autre part (EPDM). Les huiles ont été choisies comme matières premières renouvelables car elles ont des fonctions esters qui permettent la solubilisation du PVC et des chaines grasses compatibles avec l’EPDM. Les réactions d’ouvertures d’époxydes d’esters gras en di-esters (symétriques et dissymétriques) ont été étudiées et principalement appliquées à la plastification du PVC. L’ouverture d

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13

Roels, Jochen. "Beiträge zur Synthese von Modellsystemen des heterobicyclischen Grundgerüstes der Saragossasäuren/Squalestatine sowie methodische Untersuchungen zur chemoselektiven mono-Debenzylierung von N,N-Dibenzylaminen und katalytischen enantioselektiven Ringöffnung von meso-Epoxiden." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2000. http://nbn-resolving.de/urn:nbn:de:swb:14-994697037140-73077.

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Es wurden Untersuchungen zur Synthese von Modellsystemen des heterobicyclischen Grundgerüsts der Saragossasäuren/Squalestatine durch Acetalisierung unterschiedlich konfigurierter acyclischer Diketohexaole durchgeführt. In diesem Zusammenhang gelang die biderektionale Darstellung eines Modellsystems in sieben Stufen mit einer Gesamtausbeute von 34 %. Als Methode zur Etablierung der korrekten Konfiguration der Hydroxygruppen diente die asymmetrische Dihydroxylierung nach Sharples. In einem weiteren Teil der Arbeit wurde die selektive mono-Debenzylierung verschiedener N,N-Dibenzylamine mit Cer(IV

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14

Zhang, Jianbin. "Ring-opening of cycloalkane epoxides and aziridines with aromatic amines : toward the total synthesis of pactamycin." Thèse, 2009. http://hdl.handle.net/1866/3794.

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Résumé Cette thèse consiste en trois thèmes résumés dans les paragraphes ci-dessous. L’influence de différents groupements protecteurs du groupe hydroxyle lors des réactions d’ouverture des cis- et trans- 3-hydroxy-1,2-époxycycloalcanes a été étudiée. Il a été montré que Yb(OTf)3 constituait un catalyseur doux pour l’ouverture régiosélective de cycles afin d’obtenir les -anilino cycloalcanols correspondants avec de bons rendements. Le chauffage du milieu réactionnel dans le toluène comme solvant a permis d’augmenter la cinétique de la réaction, au dépend du rendement. La partie aniline a été

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15

Huang, Yu-Chieh, and 黃毓傑. "Asymmetric Ring Opening of meso-Epoxide with TMSSPh Catalyzed by (salen)VIVO Complexes." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/56465296649395852144.

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碩士<br>國立清華大學<br>化學系<br>90<br>Asymmetric syntheses of β-hydroxylsulfides are carried out by using chiral VO(salen) 18 complex at low temperature. The complex 18 is prepared from 3,5-di-tert-butyl-2-hydroxybenzaldehyde with optically pure (R,R)-cyclohexanediamine followed by reflux with VO(acac)2 in two steps. Complex 18 is stable at room temperature and easy to prepare. In our research, the enantioselectivity of products are carried out by charging chiral ligand, solvent, lewis acid, substrate and maintaining at different temperatures (-30oC-rt). The active catalyst is prepared from

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16

Sureshkumar, D. "Chemistry Of Tetrathiomolybdate And Tetraselenotungstate : Studies On Aziridine And Epoxide Ring Opening Reactions." Thesis, 2007. https://etd.iisc.ac.in/handle/2005/643.

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The thesis entitled “Chemistry of Tetrathiomolybdate and Tetraselenotungstate: Studies on Aziridine and Epoxide Ring Opening Reactions” is divided into five chapters. (For Formulas and Equations Refer PDF File) Chapter 1: Part 1: Synthesis of β-Sulfonamidodisulfides and β-Sulfonamidosulfides using Benzyltriethylammonium Tetrathiomolybdate In this chapter, a comprehensive study of general and effective one step procedure for the synthesis of β-sulfonamidodisulfides directly from optically pure N-tosyl aziridines using benzyltriethylammonium tetrathiomolybdate [BnEt3N]2MoS4 as sulfur trans

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17

Sureshkumar, D. "Chemistry Of Tetrathiomolybdate And Tetraselenotungstate : Studies On Aziridine And Epoxide Ring Opening Reactions." Thesis, 2007. http://hdl.handle.net/2005/643.

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The thesis entitled “Chemistry of Tetrathiomolybdate and Tetraselenotungstate: Studies on Aziridine and Epoxide Ring Opening Reactions” is divided into five chapters. (For Formulas and Equations Refer PDF File) Chapter 1: Part 1: Synthesis of β-Sulfonamidodisulfides and β-Sulfonamidosulfides using Benzyltriethylammonium Tetrathiomolybdate In this chapter, a comprehensive study of general and effective one step procedure for the synthesis of β-sulfonamidodisulfides directly from optically pure N-tosyl aziridines using benzyltriethylammonium tetrathiomolybdate [BnEt3N]2MoS4 as sulfur transfer

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18

Rios, Luis Alberto [Verfasser]. "Heterogeneously catalyzed reactions with vegetable oils: epoxidation and nucleophilic epoxide ring-opening with alcohols / Luis Alberto Rios." 2003. http://d-nb.info/971536392/34.

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19

Alagiri, K. "Metal-Mediated And Metal-Free Organic Transformations : C-H Functionalization Of Tertiary Amines, Synthesis Of Carbonyl Compounds And Ring-Opening Of Aziridines." Thesis, 2011. https://etd.iisc.ac.in/handle/2005/2061.

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20

Alagiri, K. "Metal-Mediated And Metal-Free Organic Transformations : C-H Functionalization Of Tertiary Amines, Synthesis Of Carbonyl Compounds And Ring-Opening Of Aziridines." Thesis, 2011. http://hdl.handle.net/2005/2061.

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