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Dissertations / Theses on the topic 'Fluorination'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Breen, Jessica Ruth. "Selective fluorination strategies." Thesis, Durham University, 2012. http://etheses.dur.ac.uk/3479/.

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There is a great interest in the synthesis of fluorinated aromatic and heterocyclic compounds, which have a range of applications in the pharmaceutical industry. Many common routes to these compounds, however, are low yielding and or/expensive. This thesis is concerned with novel methods for the synthesis of fluoro-aromatics and fluoro-pyrazoles using conventional fluorinating agents, such as Selectfluor™, as well as using elemental fluorine and the flow reactor technology developed in Durham. Firstly, elemental fluorine was used to fluorinate a range of aromatics containing electron-donating

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2

Thomas, Emmanuelle Maitrise de Chimie. "Electrophilic fluorination methodology." Thesis, Durham University, 2002. http://etheses.dur.ac.uk/4151/.

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Chapter One This chapter reviews the historical background of the fluorination using both elemental fluorine and N-F reagents. It relates the properties and preparations of these electrophilic reagents. And finally it discusses the use of these reagents in selective electrophilic fluorination (formation of C-F bond from C-H bond) of organic compounds. Chapter Two, Three and Four These chapters present our investigations into the fluorination of hydrocarbon systems containing an electron withdrawing group (ewg).Chapter Two shows the difference in reactivity of elemental fluorine and Selectfluor

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3

Scott, William Duncan Semion. "Catalytic fluorination of haloethanes." Thesis, University of Glasgow, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.337526.

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4

Greaney, Michael Francis. "Fluorination studies using difluoroiodotoluene." Thesis, University College London (University of London), 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.322308.

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5

Hollingworth, Charlotte. "Palladium mediated allylic fluorination." Thesis, University of Oxford, 2013. http://ora.ox.ac.uk/objects/uuid:8c61b9e9-b143-4c5e-b151-7e62bf4ecc03.

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In this thesis, the construction of the allylic fluorides under palladium catalysis was investigated. Chapter 1 provides a general introduction to organofluorine compounds and the use of palladium for the formation of both Csp<sup>2</sup>- and Csp<sup>3</sup>-F bonds. The aims of the thesis are presented. In Chapter 2 the identification that a p-nitrobenzoate is the optimum leaving group under Pd-catalysis to give allyl fluorides is described. A range of allylic fluorides was synthesized in 35->95% yield using the nucleophilic fluorinating reagent, TBAF(tBuOH)<sub>4</sub>. To further develop t

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6

Cresswell, Alex. "New methods for nucleophilic fluorination." Thesis, University of Oxford, 2011. http://ora.ox.ac.uk/objects/uuid:612ea592-2f52-407b-b761-36b02b746e9d.

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This thesis describes investigations into the utility of boron fluorides and tetrafluoroborates as sources of nucleophilic fluorine. Chapter 1 discusses the history and importance of the field of organofluorine chemistry and outlines some of the principle motivations for the site-selective fluorination of organic molecules. Some of the most commonly useed methods of nucleophilic fluorination are briefly surveyed, with an emphasis on the formation of fluorinated stereogenic centres. Literature precedent for the use of tetrafluoroborates and boron trifluoride as nucleophilic fluorinating agents

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7

Murray, Christopher B. "New methodology for nucleophilic fluorination." Thesis, Durham University, 2003. http://etheses.dur.ac.uk/3687/.

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This work describes the development of three methods for the fluorination of electrophilic substrates:1.) The reaction of caesium fluoride with perfluoro(2-methylpent-2-ene) leads to the formation of perfluoro(2-methylpentan-2-yl)caesium. This perfluoroalkyl carbanion has been shown to undergo significant fluoride ion exchange at temperatures above 60 C. Thus, reaction of a solution of the carbanion with a suitable electrophile resulted in the selective formation of a carbon-fluorine bond or perfluoroalkylation of the electrophile.2.) Caesium fluoride has been developed as a moderately effecti

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8

Mullins, Stephen T. "New methods for selective fluorination." Thesis, Durham University, 1986. http://etheses.dur.ac.uk/7056/.

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New methods have been developed for the selective introduction of fluorine into benzenoid aromatic compounds involving the cleavage of aryl-metal bonds by various ‘electrophilic’ fluorinating agents. Cleavage of aryl-metal bonds has been achieved using trifluoromethyl hypofluorite (CF(_3)OF), caesium fluoroxysulphate (CsSO(_4)F) and elemental fluorine and, by the nature of the process, is regiospecific. Attempts have been made to extend this method to the introduction of fluorine into imidazole bases with some success. This approach has involved the synthesis of trialkylstannyl derivatives of

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9

Nakano, Takashi. "Methodologies for selective electrophilic fluorination." Thesis, Durham University, 2004. http://etheses.dur.ac.uk/2989/.

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Chapter 1 Chapter 1 contains a discussion of the effects of the introduction of fluorine atoms into organic molecules. A review of electrophilic fluorination reactions which have been reported recently, from the viewpoint of selectivity is given. Chapter 2 As a new methodology for selective fluorination of unactivated C-H sites, geometrically directed remote fluorination of steroid derivatives was investigated. Steroid derivatives bearing a variety of tethers which possess an ability to interact with elemental fluorine were prepared. Direct fluorination of 3ɑ-(3-cyanobenzoyloxy)- 5ɑ-androstan-

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10

Parsons, Mandy. "Electrophilic fluorination at saturated carbon." Thesis, Durham University, 2000. http://etheses.dur.ac.uk/4415/.

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Chapter 1 - Chapter 1 contains a discussion of the preparation and properties of elemental fluorine. A review of the use of elemental fluorine as a selective fluorinating in organic chemistry is given and the preparation and use of other selective fluorinating agents is also described. Chapter 2 - Direct fluorination methodology for the preparation of selectively fluorinated hydrocarbon compounds was developed and used to prepare a range of both cyclic and acyclic fluoroalkanes. Selectfluor™ a commercial fluorinating agent of the N-F class, was also used to prepare selectively fluorinated hydr

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11

Sparrowhawk, Matthew Edward. "Elemental fluorine for selective fluorination." Thesis, Durham University, 1998. http://etheses.dur.ac.uk/4814/.

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This thesis relates an investigation into the use of elemental fluorine in the direct and selective fluorination of organic molecules. The thesis is divided into seven chapters which may be outlined in the following manner. Chapter One. This chapter reviews the established background of the project. It discusses the historical background of direct fluorination, the preparation and properties of elemental fluorine, its use as a reagent in selective electrophilic fluorinations in organic synthesis and its use in the generation of other selective electrophilic fluorinating agents. Chapter Two. Th

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12

Breddemann, Ulf [Verfasser], Ingo [Akademischer Betreuer] Krossing, and Harald [Akademischer Betreuer] Hillebrecht. "Fluorination of cathode active materials." Freiburg : Universität, 2020. http://d-nb.info/1238016014/34.

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13

Ó, Dúill Miriam Leslie. "Late-stage fluorination and perfluoroalkylation." Thesis, University of Oxford, 2015. https://ora.ox.ac.uk/objects/uuid:25373cc9-ae25-45c4-aafc-a1706e289ea3.

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In this thesis new synthetic routes towards perfluorinated compounds are described, as well as their radiolabelling with fluorine-18, with the aim of application in pharmaceutically interesting targets. Part A investigates late-stage fluorination, i.e. retrosynthetic CâF bond disconnections. A silver catalysed electrophilic fluorodecarboxylation of fluorinated carboxylic acids for the formation of difluoromethyl-, trifluoromethyl-, and pentafluoroethylarenes is developed and transferred to a radiochemistry setting using [<sup>18</sup>F]Selectfluor bis(triflate). Part B explores late-stage pe

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14

Kamlet, Adam Seth. "Late-Stage Fluorination with \(^{18}F\)." Thesis, Harvard University, 2012. http://dissertations.umi.com/gsas.harvard:10530.

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Positron emission tomography (PET) is a powerful, non-invasive in vivo imaging technique used for diagnostics and drug development. The synthesis of \(^{18}F\)-PET tracers is challenging due to the short half-life of the unnatural isotope that necessitates late-stage fluorination, and the limited reactivity of nucleophilic fluoride, the preferred and widely accessible form of \(^{18}F\). This thesis describes the development of an electrophilic fluorination reagent derived from fluoride. The reagent can be employed in a late-stage fluorination reaction of palladium aryl complexes to give ac

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15

Bourgeois, Amy Laura Liu. "Biodegradability of Fluorination Fire Fighting Foams." Digital WPI, 2014. https://digitalcommons.wpi.edu/etd-theses/502.

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Fluorinated fire fighting foams provide superior performance for extinguishing Class B flammable liquid fires when compared to other types of fire fighting foams. Perfluorocarboxylates and perfluorosulfonates have historically been surfactants used in these foams with a recent shift to fluorotelomer-based foams due to environmental and health concerns surrounding perfluorinated compounds such as PFOA and PFOS. Releases of aqueous film forming foams from training, accidental spills, or fire events where wastewater is not captured have, among other sources, led to detectable concentrations of fl

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16

Holling, Darren. "Microreactors and other technologies for direct fluorination." Thesis, Durham University, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.442152.

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17

Murphy, Cormac Declan. "Biological fluorination and defluorination in Streptomyces cattelya." Thesis, Queen's University Belfast, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.263506.

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18

Bankhead, Mark. "Theoretical investigation of alumina based fluorination catalysts." Thesis, University of Liverpool, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.366978.

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19

Nightingale, David J. "Novel fluoride sources for selective aromatic fluorination." Thesis, University of York, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.265565.

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20

Edmunds, J. J. "Novel fluorination reactions via hypervalent iodine reagents." Thesis, Imperial College London, 1988. http://hdl.handle.net/10044/1/47045.

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21

De, Mas Valls Nuria 1975. "Scalable multiphase microchemical systems for direct fluorination." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/29446.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemical Engineering, 2004.<br>Includes bibliographical references.<br>Microchemical systems or microreactors refer to a new class of continuous reactors that have feature sizes in the submillimeter range. In particular, microfabricated chemical reactors are built using silicon-based photolithographic fabrication techniques that were originally developed to create integrated microelectronic circuits. Because silicon microfabrication allows precise control over the geometry of the reactor features down to the micron scale, as well

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22

FIELDING, JENNIFER CHASE. "FLUORINATION OF SILICONE RUBBER BY PLASMA POLYMERIZATION." University of Cincinnati / OhioLINK, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1085442499.

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23

Trmcic, Jelena. "Electrophilic fluorination of ethers and deactivated benzene derivatives." Thesis, Durham University, 2005. http://etheses.dur.ac.uk/2769/.

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Chapter 1 - Chapter 1 provides a literature review of the relevant topics for this thesis in organofluorine chemistry: effect of fluorine as a substituent on the molecule, synthesis of C-F bond from C-H bond using electrophilic reagents with discussions of mechanisms. Chapter 2 ― Direct fluorination of electron-rich systems such as alkyl and cyclic saturated ethers using elemental fluorine results in the formation of unexpected products: fluorinated aldal acetáis. Selectfluor™ was also used to prepare these products in good yield, but also to gain information about mechanism. Chapter 3 - Same

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24

Tsiliopoulos, Efthimios. "Studies on the specific fluorination of organic substrates." Thesis, University of Manchester, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.333646.

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25

Beaumont, Andrew J. "A study of some selective nucleophilic fluorination reactions." Thesis, University of York, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.306248.

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26

Comeforo, Kristofer. "Harnessing the Power of Fluorination for Protein Engineering." Thesis, Boston College, 2009. http://hdl.handle.net/2345/682.

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Thesis advisor: Jianmin Gao<br>A common method of studying proteins is to introduce mutations into the amino acid sequence of the system. Incorporating phenylalanine analogs of varying degrees and sites of fluorination on the aromatic system gave substantial insight into the structure—function relationship of model peptide systems. By strategically placing tetrafluorinated phenylalanine mutants into the villin headpiece, HP35, increased thermodynamic and thermal stability was achieved. Using these highly but not fully fluorinated novel amino acid analogs allowed for the retention of the import

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27

Xu, Wenjian. "Fluorination Effect on the Conformational Properties of Alkanes." Thesis, University of North Texas, 2002. https://digital.library.unt.edu/ark:/67531/metadc3103/.

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A Series of fluorophores of the general formular P(CF2)nP and P(CF2)n-1CF3 has been synthesized. Copper catalyzed coupling of 1-bromopyrene and the corresponding mono and di-iodoperfluoroalkanes were used in most cases. For the n=3 dimer, a novel 1,w-perfluoroalkylation of pyrene via bis-decarboxylation of hexafluorogultaric acid was utilized. These compounds, along with suitable hydrocarbon analogs, are being used to study the flexibility of fluorocarbon chains using emission. We have found that the excimer formation for the fluorinated pyrene monomers is highly dependent on concentration

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28

Okazoe, Takashi. "Synthetic Studies on Perfluorinated Compounds by Direct Fluorination." 京都大学 (Kyoto University), 2009. http://hdl.handle.net/2433/70019.

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29

Pienaar, A. D. "Niobium and tantalum beneficiation using gas-phase fluorination." Thesis, University of Pretoria, 2014. http://hdl.handle.net/2263/46243.

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The processing of minerals containing tantalum and niobium is a challenge that has most modern researchers focused on optimising the processes that have already reached scientific maturity. Ore digestion in aqueous mixtures of sulfuric and hydrofluoric acid, followed by selective liquid-liquid extraction, is the method of choice for recovery of tantalum and niobium from the parent minerals. As this method has significant environmental and practical drawbacks, there is a need for a new process to beneficiate these minerals. The Advanced Metals Initiative (AMI) programme of the Department of Sc

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30

Zhang, Pengcheng [Verfasser], Ingo [Akademischer Betreuer] Krossing, and Peter [Akademischer Betreuer] Woias. "Study of direct fluorination in mini- and microreactors." Freiburg : Universität, 2020. http://d-nb.info/1211326551/34.

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31

Callahan, Ryan Patrick. "The synthesis of perfluorinated compounds by direct fluorination organometallic compounds and carboranes /." Access restricted to users with UT Austin EID Full text (PDF) from UMI/Dissertation Abstracts International, 2001. http://wwwlib.umi.com/cr/utexas/fullcit?p3036160.

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32

Yeamans, Charles Burnett 1978. "Dry process fluorination of uranium dioxide using ammonium bifluoride." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/58370.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 2003.<br>Includes bibliographical references (p. 59-60).<br>An experimental study was conducted to determine the practicality of various unit operations for fluorination of uranium dioxide. The objective was to prepare ammonium uranium fluoride double salts from uranium dioxide and ammonium bifluoride, then decompose these salts to uranium tetrafluoride through heating to temperatures near 425 °C in either a fluidized bed or a stirred bed. Fluorination in the stirred bed was attempted without pretreatment of th

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33

Samsonov, Sergey. "Protein-protein interactions: impact of solvent and effects of fluorination." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2009. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-25194.

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Proteins have an indispensable role in the cell. They carry out a wide variety of structural, catalytic and signaling functions in all known biological systems. To perform their biological functions, proteins establish interactions with other bioorganic molecules including other proteins. Therefore, protein-protein interactions is one of the central topics in molecular biology. My thesis is devoted to three different topics in the field of protein-protein interactions. The first one focuses on solvent contribution to protein interfaces as it is an important component of protein complexes. The

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34

Ojogun, Vivian Aramide. "EFFECT OF FLUORINATION ON PARTITIONING BEHAVIOR AND BILAYER SELF ASSEMBLY." UKnowledge, 2010. http://uknowledge.uky.edu/gradschool_diss/791.

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Fluorinated systems are defined by unique properties that offer advantages in drug delivery, material synthesis and industrial applications. In comparison to their hydrocarbon counterparts, the design of fluorinated solutes for tailored applications is limited by the inability to predict the effect of fluorination on phase behavior. This work examines and interprets the influence of fluorination on the phase behavior of fluorinated solutes and surfactants, with emphasis on their impact on vesicle bilayers. Thermodynamic partitioning of functionalized series of fluorinated and hydrocarbon nicot

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35

Milner, Phillip J. "The Pd-catalyzed fluorination of (hetero)aryl bromides and triflates." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/98788.

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Thesis: Ph. D. in Organic Chemistry, Massachusetts Institute of Technology, Department of Chemistry, 2015.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references.<br>Chapter 1: This chapter details mechanistic work regarding the reductive elimination of electron-rich aryl fluorides from L-Pd(Ar)F species. An unexpected dearomatization/arylation process of Pd(II) complexes bearing bulky biaryl phosphines was discovered, resulting in ligand arylation during the catalytic fluorination of aryl triflates. This process must occur prior to C-F reductive elimination. Further e

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36

Ogbeifun, Osemeikhian. "Sol-gel and solid-state fluorination of lithium cobalt oxide for Li-ion secondary batteries." Diss., University of Pretoria, 2017. http://hdl.handle.net/2263/66580.

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A series of fluorinated LiCoO2 compounds, LiCoO2−xFx with x = 0.05 − 0.65, were synthesised by both a sol-gel and a solid-state method. The sol-gel method utilises LiNO3 and Co(NO3)2.6H2O as Li and Co sources respectively, water and 1-butanol as solvent for the fluoride precursor LiF, and citric acid as the chelating agent. The prepared materials were compared using pXRD, SEM, Raman, TG and DTA analyses. pXRD revealed a secondary phase appearing at x= 0.25 in materials prepared by the sol-gel method and as early as x= 0.08 in materials prepared by the thermal solid-state method. Materials prep

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37

Vasdev, Neil Chirakal R. V. Schrobilgen G. J. "Syntheses of fluorine-18 labelled compounds and radiopharmaceuticals by electrophilic fluorination /." *McMaster only, 2003.

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38

Ilupeju, John Oluwafemi. "Synthesis and use of new chiral DABCO derivatives for asymmetric fluorination." Thesis, University of Oxford, 2012. http://ora.ox.ac.uk/objects/uuid:1ee07d47-49ce-4072-a739-c20857d3b468.

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In this thesis, the synthesis, reactivity and enantioselectivity of novel chiral Selectfluor Analogues were investigated. Chapter 1: Discussed is a general introduction to Selectfluor as an achiral electrophilic fluorinating reagent and its role as an oxidant in a wide variety of transformations and summarises the aims and objectives of the project. Chapter 2: The synthesis of chiral 2-monosubstituted, 2,3-disusbstituted and 2,5-disubstituted DABCO derivatives is described. We selected two strategies to prepare these chiral analogues of DABCO. Strategy A takes advantage of a large range of com

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39

Pfeifer, Lukas. "New methods and reagents for carbon-fluorine bond formation." Thesis, University of Oxford, 2016. https://ora.ox.ac.uk/objects/uuid:fe082120-eae7-4299-a349-0d42401ff501.

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After a general introduction about the properties and preparation of organofluorine compounds (Chapter 1), this thesis is divided into two parts focussing on the development of new methods for C-F bond formation (Part A) as well as studies towards the development of novel fluorinating reagents (Part B). Part A: New Methods for Carbon-Fluorine Bond Formation Part A consists of two chapters outlining the development of a Pd-catalysed hydrofluorination of alkenylarenes (Chapter 2) as well as a halofluorination of alkynes (Chapter 3). Chapter 2 This chapter describes the development of a novel, re

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40

De, Villiers Jandré. "Attempted routes towards the synthesis of fluorinated analogues of ornithine as potential inhibitors of ornithine decarboxylase /." Link to the online version, 2007. http://hdl.handle.net/10019/417.

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41

Hopkins, Janet. "Plasma treatment of polysulfone gas separation membranes." Thesis, Durham University, 1995. http://etheses.dur.ac.uk/5231/.

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The chemical and topographical nature of a polymer surface can be changed by non-equilibrium glow discharge treatment. Surface modification of polysulfone and polyethersulfone was examined using a variety of plasma treatments at a fixed power, pressure and treatment time. The modification observed was found to be dependent upon the type of feed gas employed. Tetrafluoromethane plasmas fluorinate polymer surfaces. The influence of polymeric structure on the extent of modification was examined. Phenyl ring containing polymers experienced a greater extent of modification compared to saturated pol

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42

Hill, Mathias [Verfasser], and Ingo [Akademischer Betreuer] Krossing. "Direct fluorination in mini and microreactors = Direkte Fluorierung in Mini- und Mikroreaktoren." Freiburg : Universität, 2013. http://d-nb.info/1115494619/34.

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Irving, Susan. "Studies on the development of a new NF reagent for asymmetric fluorination." Thesis, University of Newcastle Upon Tyne, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.424131.

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Zheng, Hong. "Designing Peptides to Target Membrane Lipids and to Evaluate Fluorination of Proteins." Thesis, Boston College, 2012. http://hdl.handle.net/2345/3682.

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Thesis advisor: Jianmin Gao<br>My graduate research has used engineered peptides to perturb the non-covalent interactions in protein folding, protein-protein association and protein-membrane association. We have focused on understanding the fundamental principles of molecular recognition behind protein-protein and protein-membrane interactions, and further using these principles in protein engineering. This thesis includes three projects. I) Towards Small Molecule Receptors for Membrane Lipids: A Case Study on Phosphatidylserine The lipid composition and distribution of cell membranes play imp

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Kaur, Sandeep. "Modify the electronic structure of monolayer MoS2 through electron-beam-activated fluorination." Thesis, Uppsala universitet, Institutionen för fysik och astronomi, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-426011.

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46

Furuta, Satoru. "Synthetic Studies on Organofluorine Compounds through Oxidative Desulfurization -Fluorination of Organosulfur Compounds." Kyoto University, 2000. http://hdl.handle.net/2433/151524.

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47

Taylor, Nicholas J. "Copper-mediated nucleophilic 18F-radiolabelling of (hetero)arenes for applications in positron emission tomography." Thesis, University of Oxford, 2017. http://ora.ox.ac.uk/objects/uuid:3fbaaf65-a9a0-4522-8310-6acf29e3ff7c.

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This thesis focuses on the development of a novel nucleophilic <sup>18</sup>F-fluorination of (hetero)arenes and of a rapid screening experiment to facilitate the application of this reaction to complex heterocyclic targets of medicinal importance. <strong>Chapter 1</strong> introduces the use of molecules labelled with fluorine-18 as tracers in positron emission tomography and reviews methods for the preparation of [<sup>18</sup>F]fluoroarenes published prior to the start of the work in this thesis. <strong>Chapter 2</strong> describes the development of a novel method for the preparation of

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48

Buckingham, Faye. "Organomediated approaches to 18F-radiochemistry for PET." Thesis, University of Oxford, 2015. https://ora.ox.ac.uk/objects/uuid:00774f21-9abf-4a4a-b4d3-1300e3ae3fa1.

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This thesis has focussed on <sup>18</sup>F-fluorination reactions activated by an organomediator, with the aim of broadening the scope of metal-free reactions in <sup>18</sup>F-radiosynthesis. <b>Chapter 1</b> provides an introduction to positron emission tomography (PET) and <sup>18</sup>Fradiochemistry, including radioisotope production and modes of activation in <sup>18</sup>Fradiosynthesis. In <b>Chapter 2</b>, the concept of chirality and its relevance in the context of radiotracer design is introduced. The previously disconnected fields of organomediated asymmetric fluorination and <sup>

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Durie, Alastair J. "Multivicinal fluorine substitution of the cyclohexane ring." Thesis, University of St Andrews, 2014. http://hdl.handle.net/10023/8080.

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Highly polar organic fluorinated motifs are of interest in materials chemistry, for example, in liquid crystal applications. Cyclohexane is an important and widely used structural motif within organic chemistry. Work has been carried out to prepare single stereoisomers of multivicinal fluorinated cyclohexanes, a class of compounds that has not been previously produced. A synthesis of the all-syn-1,2,3,4-tetrafluorocyclohexane, in 9 steps from cyclohexa-1,3-diene will be presented. The ¹⁹F NMR spectra of the all-syn-1,2,3,4-tetrafluorocyclohexane shows interesting dynamic conformational effects

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Harrison, Kareem. "Inhibition of Hydrocarbon Autoxidation by Nitroxide Catalyzed Cross Dismutation of Alkylperoxyl and Hydroperoxyl Radicals & a Novel Approach Toward Fluorinated Polyunsaturated Lipids." Thesis, Université d'Ottawa / University of Ottawa, 2020. http://hdl.handle.net/10393/40026.

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Nitroxides are intermediates in the accepted reaction mechanisms of the antioxidant activity of diarylamines and hindered alkyl amines. The parent amines are used as additives to preserve synthetic and natural hydrocarbon-based materials from oxidative degradation. New methodology which enables monitoring of hydrocarbon autoxidations at low rates of radical generation has revealed that diarylnitroxides and hindered nitroxides are far better inhibitors of unsaturated hydrocarbon autoxidation than their precursor amines, implying intervention of a previously overlooked mechanism. Experimental a

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