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Dissertations / Theses on the topic 'Rearrangements (Chemistry) Chemistry'

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Published: 4 June 2021

Last updated: 3 February 2022

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1

Sellers, Thomas G. R. "Stereoselective N,O rearrangements." Thesis, University of Oxford, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.270280.

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2

Mohamed, Mustafa Abdi. "Synthesis of [alpha]-allynyl and [alpha]-allylsilane amino acids by the Claisen rearrangement /." *McMaster only, 2001.

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3

Guevel, Ronan. "Synthetic Studies towards Vinigrol Tandem Cope-Cope Rearrangements /." The Ohio State University, 1994. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487850665559446.

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4

Birkinshaw, Simon Jonathan. "1,2-metallate rearrangements of #alpha#-alkoxyvinylborates." Thesis, University of Southampton, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.293210.

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5

Mohamed, Mubina. "Understanding cyclobutenone rearrangements : a study under flow." Thesis, University of Southampton, 2014. https://eprints.soton.ac.uk/362639/.

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6

McCormick, Alison Sarah. "Synthesis and rearrangements of vinylidenecyclopropanes and dimethylenecyclopropanes." Thesis, University of Edinburgh, 1985. http://hdl.handle.net/1842/15322.

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7

Loparo, Joseph J. (Joseph John). "Ultrafast structural fluctuations and rearrangements of water's hydrogen bonded network." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/38623.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, February 2007.<br>"December 2006." Vita.<br>Includes bibliographical references.<br>Aqueous chemistry is strongly influenced by water's ability to form an extended network of hydrogen bonds. It is the fluctuations and rearrangements of this network that stabilize reaction products and drive the transport of excess protons through solution. Experimental observations of the dynamics of the hydrogen bonded network are difficult because (1) the timescales are exceedingly fast with relevant fluctuations occurring on a tens

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8

Mulhall, Steven Eric. "I. Rearrangements of beta-heteroatomic carbenes ; II. Chemistry of 2-tert-butyl-4-diazobenzopyran /." The Ohio State University, 1989. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487675687173776.

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9

Gabbutt, Christopher David. "Reactions and rearrangements of chroman-4-ones and related compounds." Thesis, University of Central Lancashire, 1987. http://clok.uclan.ac.uk/19780/.

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The synthesis of a range of novel 2,2-disubstituted chroman-4-ones has been accomplished by the pyrrolidine catalysed condensation of a 2-hydroxyacetophenone with aldehydes and ketones. The reaction permits access to both symmetrically and unsymmetrically substituted compounds. The reaction has been extended to the preparation of a novel furochromanone, an analogue of the natural product khellin. The Schmidt reaction of 2,2-disubstituted chroman-4-ones in an acetic-sulphuric acid mixture affords 2,3,4.5-tetrahydro-1.4- benzoxazepine-5(411)--ones, resulting from alkyl migration of the iminodisz

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10

老永康 and Wing-hong Lo. "Novel rearrangements of dioxodibenz[b,f]azocine." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1996. http://hub.hku.hk/bib/B3121437X.

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11

Lo, Wing-hong. "Novel rearrangements of dioxodibenz[b, f]azocine /." Hong Kong : University of Hong Kong, 1996. http://sunzi.lib.hku.hk/hkuto/record.jsp?B18597671.

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12

Doyon, Julien Georges Pierre-Oliver. "Application of the sigmatropic and electrocyclic rearrangements to the rapid construction of polycyclic carbogens /." The Ohio State University, 1995. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487861796819656.

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13

Jones, Sally A. "Acyclic stereocontrol via tandem [2,3]-Wittig-[3,3]- anionic oxy-cope rearrangements." Thesis, University of Liverpool, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.266314.

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14

Jones, Alan Morenc. "The synthesis of medium-sized ring containing libraries using oxidative fragmentation and rearrangement strategies /." St Andrews, 2009. http://hdl.handle.net/10023/663.

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15

He, Wei. "Application of (3,3)-sigmatropic rearrangements to the rapid elaboration of complex molecules including natural products /." The Ohio State University, 1991. http://rave.ohiolink.edu/etdc/view?acc_num=osu1341508945.

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16

Roberts, Sean T. (Sean Thomas). "Hydrogen bond rearrangements and the motion of charge defects in water viewed using multidimensional ultrafast infrared spectroscopy." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/57678.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Chemistry, February 2010.<br>"December 2009." Cataloged from PDF version of thesis. Vita.<br>Includes bibliographical references.<br>Compared with other molecular liquids, water is highly structured due to its ability to form up to four hydrogen bonds to its nearest neighbors, resulting in a tetrahedral network of molecules. However, this network is highly dynamic, exhibiting fluctuations and rearrangements that take place on femtosecond to picosecond time scales. The transport of excess protons and proton holes in water makes ex

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17

MacCorquodale, Finlay. "Radical rearrangements of unsaturated ring derivatives and the investigation of routes to polynitroxides." Thesis, University of St Andrews, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.278104.

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18

Bohnert, Gary J. "A 4+3 cycloaddition / quasi-favorskii rearrangement approach to the total synthesis of sterpurene /." free to MU campus, to others for purchase, 2003. http://wwwlib.umi.com/cr/mo/fullcit?p3091900.

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19

Rasheed, Omer. "Aspects of organonitrogen and organosulphur chemistry in synthesis and recognition." Thesis, University of Manchester, 2016. https://www.research.manchester.ac.uk/portal/en/theses/aspects-of-organonitrogen-and-organosulphur-chemistry-in-synthesis-and-recognition(c5f19156-176a-4110-8518-a70698d79f2f).html.

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Further investigations intending illucidate the mechanism of a newly discovered redox-alkylation reaction of azo dyes are presented. Preliminary results indicate that this reaction most probably proceeds via initial N-alkylation of the anion derived from an alpha-ketohydrazone. An investigation is continued to study the synthesis of macrocycle-carbohydrate-dye hybrids. The development of a modular approach to macrocycle assembly has enabled the synthesis of a library of pyridine-based macrocycles possessing multiple donor sites. A central dye scaffold, prepared from the SNAr reaction between h

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20

Moss, Neil. "Divinylcyclopropane rearrangements : preparation of tricyclic ring systems and a formal total synthesis of (±)-quadrone." Thesis, University of British Columbia, 1985. http://hdl.handle.net/2429/25942.

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The first section of this thesis describes three model studies involving the synthesis of the divinylcyclopropanes (135), (136), and (137) and the subsequent thermal rearrangement of these compounds to provide the interesting tricyclic compounds (139), (140), and (141). [Formula Omitted] The second section of this thesis describes a formal total synthesis of the antitumor sesquiterpenoid (±)-quadrone (34). The synthesis is based on the chemistry developed in the model studies and involves the thermal rearrangement of the divinylcyclopropane (304) as the key step. The resulting product, compoun

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21

Wireko, Fred Christian. "Crystallographic studies on the di-[pi]-methane rearrangement of dibenzobarrelenes." Thesis, University of British Columbia, 1988. http://hdl.handle.net/2429/29216.

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The molecular and crystal structures of dibenzobarrelene and a number of its diester derivatives, and three dibenzosemibullvalenes have been determined by the use of X-ray crystallography. The objectives of the study were to investigate whether or not the di-π-methane photorearrangement could be carried out in the solid state, and how such solid state results would differ from results obtained in solution. In addition, we were interested in investigating the extent to which intermolecular steric effects would modulate or change the course of the photorearrangement in the solid state as compare

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22

Dimartino, Gianluca. "Ring expansion routes to cyclic fluoroketones by oxy-Cope and Claisen rearrangements." Thesis, University of Birmingham, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.369156.

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23

Lamb, Alan David. "Asymmetric synthesis of heterocycles via cation-directed cyclizations and rearrangements." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:4c0cf06c-d461-42a4-b4d8-a2a2bd961435.

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The aim of this project was to utilize chiral cation-directed catalysis in the asymmetric synthesis of novel hererocycles. This goal was initially realized by the synthesis of azaindolines in high yields and enantioselectivities (Chapter 2). Extension of this methodology to substrates bearing two stereogenic centres was successful, although control over both diastereoselectivity and enantioselectivity in this process was modest. Finally the synthesis of heterocycles utilizing cation-directed rearrangement processes was examined, with proof of concept obtained for a novel asymmetric cyclization

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24

Hutson, Leslie K. "Synthesis of Benzoxazoles Containing Allyl Crosslinking Sites via Claisen Rearrangements." Wright State University / OhioLINK, 1999. http://rave.ohiolink.edu/etdc/view?acc_num=wright974400715.

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25

White, Walter Reynolds. "Rearrangements in the ground and excited states of carbenes and diazirines : the equilibrium constant between homocubene and homocubanylidene and concurrent hydrogen migration and nitrogen extrusion in the excited... /." The Ohio State University, 1992. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487760357822815.

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26

Suvannachut, Kessara. "Scope and mechanism of the rearrangement of alkoxybenzyl anions to alkylphenoxide ions; cyclophanes from 2,6-dimethylanisole." Diss., The University of Arizona, 1989. http://hdl.handle.net/10150/184679.

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Alkoxy alkyl groups migrate to benzylic carbon when alkyl alkylphenyl ethers are treated with n-butyllithium and potassium t-butoxide. For alkyl 2,6-dialkylphenyl ethers, yields of the rearrangement products range from 45-70%. Rearrangement products are obtained in 10-30% yield from other dimethylanisoles and methylanisoles. The reactions appear to proceed by homolytic cleavage of the alkoxy alkyl group of alkoxybenzyl anions followed by recombination of the resulting radical pair in a different way. The reaction is useful for preparing 2,6-dialkylphenols and their corresponding ethers. The re

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27

Zhurakovskyi, Oleksandr. "Pericyclic and related rearrangements for the synthesis of nitrogen heterocyclic ring systems." Thesis, University of Oxford, 2013. http://ora.ox.ac.uk/objects/uuid:d7e4bbea-4009-4e7e-838c-46b4bb81bc13.

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The thesis describes synthesis and reactions of allene azides tethered to various functional groups and the application of the discovered cascade transformations towards the synthesis of radianspene J model system. Chapter 1 covers reactions of simple allene azides containing alkyl and cycloalkyl substituents. Thermal rearrangements of these substrates delivered isocyanides and azadienes via the proposed azatrimethylenemethane (ATMM) intermediates. On the other hand, vinylidenecyclopropanes (VDCPs) gave dramatically different products, as described in Chapter 2. A phenyl-substituted VDCP was t

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28

Biggs, Timothy Nolen. "Part I. Thermal and photochemical rearrangements of p-quinol cyclopropyl ethers to spiro-fused tetralones. Part II. Preparation and reactivity of p-benzoquinol imines. Investigation of glutathione/quinol imine coupling and quinol... /." The Ohio State University, 1994. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487849696967873.

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29

Arrey, Lucas Nyenty. "Part I. Synthetic efforts towards 4H-cyclobuta(de);quinoline; chemistry of 4-quinolyldiazomethane. Part II. The effects of temperatures and bases on the stereochemistry of hydrogen rearrangements in alkyl 3- and 4-pyridylmethylenes /." The Ohio State University, 1997. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487942739806582.

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30

Lerach, Jordan O. "Investigations into the Gas-Phase Rearrangements of Some Transition Metal β-Diketonate Complexes". Youngstown State University / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1222114603.

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31

Kurian, Anish. "Molecular Rearrangements at Polymeric Interfaces Probed by Sum Frequency Spectroscopy." University of Akron / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=akron1301163423.

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32

Bozkaya, Ugur. "Theoretical Study Of Thermal Rearrangements Of 2-alkylidenecyclopenta-1,3-diyl Biradicals." Phd thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613301/index.pdf.

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Thermal rearrangements of Berson TMMs have been investigated. For this purpose, the potential energy surface of the singlet S state has been explored to test Benson&rsquo<br>s Schemes 1-2 (Figure 1.10 and 1.11). It is verified that the enyne 9c plays a central role in connecting the two portions of the reaction path (Berson Schemes 1 and 2). Connectivity of successive minima on a given surface has been verified by intrinsic reaction coordinate (IRC) computations. Density functional theory (DFT) and multiconfiguration self consistent field (MCSCF) methods have been employed for these purposes.

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33

Rigby, Suzie S. "Sigmatropic and haptotropic shifts in complexes of cyclopenta(l)phenanthrene." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape16/PQDD_0020/NQ30185.pdf.

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34

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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35

郭乃超 and Nai-chiu Kwok. "Some chemistry of dibenzo-azocine, -azonine and -azecine rings, attempted synthesis of 6, 12-dioxodibenzo[b,f]oxocin, and novelreactions and rearrangements of deoxybenzoin carboxylic acidderivatives." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1992. http://hub.hku.hk/bib/B31210843.

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36

Brown, Trevor C. "Studies in collisional energy transfer of highly rotationally and vibrationally excited molecules /." Title page, contents and abstract only, 1988. http://web4.library.adelaide.edu.au/theses/09PH/09phb881.pdf.

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Thesis (Ph. D.)--University of Adelaide, 1989.<br>Typescript (Processed). Errata slip inserted. Spine title: Studies in collisional energy transfer of highly excited molecules. Includes bibliographical references (leaves 143-167).

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37

Kwok, Nai-chiu. "Some chemistry of dibenzo-azocine, -azonine and -azecine rings, attempted synthesis of 6, 12-dioxodibenzo[b, f]oxocin, and novel reactions and rearrangements of deoxybenzoin carboxylic acid derivatives /." [Hong Kong : University of Hong Kong], 1992. http://sunzi.lib.hku.hk/hkuto/record.jsp?B13387613.

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38

Topiwala, Upendra P. "Biomimetic radical spirocyclisation and rearrangement chemistry." Thesis, University of Nottingham, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.338494.

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39

Campbell, Craig D. "Lewis base-promoted organocatalysis : O- to C-carboxyl transfer reactions." Thesis, University of St Andrews, 2010. http://hdl.handle.net/10023/2609.

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This work describes the application of a variety of Lewis bases, encompassing predominantly N-heterocyclic carbenes (NHCs), but also the use of imidazoles, aminopyridines, amidines and isothioureas, as effective catalysts in the dearomatisation of heterocyclic carbonates, predominantly the rearrangement of oxazolyl carbonates to their C-carboxyazlactone isomers by means of the Steglich rearrangement. This rearrangement reaction has been investigated extensively, with the development of simplified reaction procedures and the invention of domino cascade protocols incorporating this transformatio

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40

Liu, Gu. "Target identification and validation studies in chemical biology & Synthesis of medium-sized ring containing compounds via oxidative fragmentation." Thesis, University of St Andrews, 2010. http://hdl.handle.net/10023/986.

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Part I of this thesis describes the development of bioactive small molecules of relevance to the study of the apicomlexan parasite Toxoplasma gondii into useful chemical tools. The research includes the target identification and validation studies, using both chemical and biological methods. Chapter 1 provides an overview of chemical genetics with a particular emphasis on methods for the identification of the protein targets of bioactive small molecules. The concept of biochemical protein target identification techniques was introduced with a detailed discussion of interesting applications fro

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41

Lefranc, Julien. "Lithiation chemistry of vinyl ureas." Thesis, University of Manchester, 2011. https://www.research.manchester.ac.uk/portal/en/theses/lithiation-chemistry-of-vinyl-ureas(b559b2b8-744e-4dbe-87ee-4a5fef7d3443).html.

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The construction of tertiary alkylamines is a synthetic challenge exacerbated by the poor electrophilicity of imines. Due to the presence of this kind of building block in a large number of bioactive molecules, the development of new strategies to synthesise the quaternary carbon centre is essential. This thesis describes the work carried out on the rearrangement of lithiated vinyl ureas in order to form α-tertiary amines. The first part presents how vinyl ureas were synthesised, using the reaction between an imine and an aryl isocyanate. The development of one-pot process allows the synthesis

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42

Alabdullah, Basil. "Stereoselective organoborate rearrangement reactions." Thesis, Cardiff University, 2015. http://orca.cf.ac.uk/75961/.

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This thesis describes the use of organoborate rearrangement reactions to generate quaternary carbon centres, with the ultimate goal of exploring new procedures for the asymmetric synthesis of chiral quaternary carbon centres. Chapter One: this chapter contains a historical review of the use of organoboranes in organic synthesis, focusing mainly on the use of boronic esters in asymmetric organic synthesis. Chapter Two: this chapter focuses on attempts at developing a catalytic method for the generation of quaternary stereocentres using migration reactions of boronic esters with n-butyllithium i

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43

Larsson, Per-Erik. "Modelling Chemical Reactions : Theoretical Investigations of Organic Rearrangement Reactions." Doctoral thesis, Uppsala University, Department of Quantum Chemistry, 2003. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-3475.

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<p>Chemical reactions are ubiquitous and very important for life and many other processes taking place on earth. In both theoretical and experimental studies of reactivity a transition state is often used to rationalise the outcome of such studies. The present thesis deals with calculations of transition states in radical cation rearrangements, and a principle of least motion study of the rearrangements in the barbaralyl cation.</p><p>In particular, alternative quadricyclane radical cation (<b>Q∙</b><b>+</b>) rearrangements are extensively studied. The rearrangement of <b>Q∙</b><b>+</b> to nor

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44

Noble, Lynda. "Photochemical rearrangement and dehalogenation of polyhalogenodiazines." Thesis, University of Sunderland, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.329818.

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45

Button, Martin Andrew Colin. "Development of the amino-cope rearrangement." Thesis, University of Huddersfield, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.285613.

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46

O'Mahony, Donogh John Roger. "Rearrangement and trapping of organozinc carbenoids." Thesis, University College London (University of London), 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.308938.

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47

Pocock, Ian. "Novel cascade aryne-capture/rearrangement reactions." Thesis, University of Huddersfield, 2014. http://eprints.hud.ac.uk/id/eprint/23743/.

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Arynes are reactive intermediates that have been an academic curiosity for over a century. A recent renaissance of interest in the chemistry of these intermediates can be traced back to the development of ortho-(silyl)aryl triflates as aryne precursors. The application of aryne chemistry outside academia has been precluded by the expense and laborious preparation of these precursors. Diphenyliodonium-2-carboxylate has been shown to be a stable and inexpensive benzyne precursor, however application has been limited due to the high temperature (>160 ºC) and long reaction times required to genera

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48

DeRussy, Donald Thomas. "Diastereoselective formation and stereocontrolled rearrangement of anionic oxy-cope precursors /." The Ohio State University, 1989. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487671640054272.

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49

Krishnamurthy, Venkatanarayanan. "The oxiranyl carbinyl radical rearrangement synthetic applications and kinetic studies /." The Ohio State University, 1995. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487864485228417.

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50

Chogii, Isaac, and Isaac Chogii. "New Anionic Annulation Reactions and Anion Accelerated Amino-Cope Rearrangement." Diss., The University of Arizona, 2016. http://hdl.handle.net/10150/621558.

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New Anionic Annulation Reactions and Anion Accelerated Amino-Cope Rearrangement. This dissertation compiles asymmetric anionic reactions of chiral Ellman sulfinyl imines and dienolates to access diverse nitrogen-containing compounds. Chiral sulfinimines and dienolates derived from 𝛾-bromocrotonates reacted diastereoselectively forming 3-pyrrolines and 𝑐𝑖𝑠-vinyl aziridines via a formal [3+2]-annulation and vinylogous 𝑎𝑧𝑎-Darzens reactions respectively. Concise asymmetric syntheses of three natural products have been achieved demonstrating the power of the [3+2]-methodology. Reaction of conjugat

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