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Dissertations / Theses on the topic 'Nucleophilic substitution reactions'

Author: Grafiati

Published: 4 June 2021

Last updated: 5 February 2022

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1

Martin, Peter Arnold. "Nucleophilic substitution reactions of some polyhalogenated compounds." Thesis, Durham University, 1987. http://etheses.dur.ac.uk/6876/.

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Rate measurements for the reactions of a series of polyfluoro - and polychloro - pyridines with aniline and ammonia in 60/40 dioxan/water at 25ºC has shown that chlorine, when ortho and para to the position of attack, is activating with respect to fluorine, but at the position meta to the point of attack, chlorine and fluorine are virtually equivalent in their effect on reaction rate. The trifluoromethyl and nitrile groups were found to be activating relative to fluorine when ortho and para to the position of substitution and the nitrile group was thus found to be ortho/para directing. The ort

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2

Jones, Craig Warren. "Nucleophilic aromatic substitution using supported copper(I) reagents." Thesis, University of York, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.236184.

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3

Drew, S. M. "Photochemical nucleophilic substitution reactions of quinones and related systems." Thesis, University of Leeds, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.374182.

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4

Van, der Westhuizen Carl Johan. "Nucleophilic substitution reactions of α-haloketones : a computational study". Diss., University of Pretoria, 2017. http://hdl.handle.net/2263/63346.

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This dissertation describes the computational modelling of reactions between α-haloketones and various nucleophiles. Nucleophilic substitution reactions of α-haloketones (also known as α- halocarbonyls in literature) are utilised in synthetic laboratories to obtain 1,2-disconnections; which are typically difficult to obtain otherwise. To gain insight into these reactions, DFT modelling was carried out in this project, with further understanding into these reactions being obtained using Quantum Fragment Along Reaction Pathway (QFARP) which is an extension of Interacting Quantum Atoms (IQA

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5

Iagrossi, Anna. "Stereochemical studies of reactions of phosphate and thiophosphate esters." Thesis, University of Leicester, 1988. http://hdl.handle.net/2381/33748.

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Nucleophilic substitution reactions involving phosphate monoesters have been investigated. Two general syntheses of O-alkyl or O-aryl [16O,18O] thiophosphate monoesters are reported. An independent and general method for the determination of the enantiomeric excess of isotopically chiral thiophosphate monoesters has been developed and the absolute configurations of the diastereoisomers of (2R)-O-(O-ethyl thiophosphoryl)-3, 4S-dimethyl-5S-phenyl-l,3,2-oxazaphos- pholidin-2-one have been assigned. The solvolysis of p-nitrophenyl [R-16O,18O] thiophosphate in ethanol gives rise to ethyl [16O, 18O]

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6

Balan, Gayatri. "Studies on the nucleophilic substitution reactions of a dimeric cyclopentadienone." Diss., Columbia, Mo. : University of Missouri-Columbia, 2007. http://hdl.handle.net/10355/6265.

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Thesis (M.S.)--University of Missouri-Columbia, 2007.<br>The entire dissertation/thesis text is included in the research.pdf file; the official abstract appears in the short.pdf file (which also appears in the research.pdf); a non-technical general description, or public abstract, appears in the public.pdf file. Title from title screen of research.pdf file (viewed on January 11, 2008) Includes bibliographical references.

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7

James, Rachel Anne. "Nucleophilic substitution reactions of (alkoxymethylene) dimethylammonium chloride and cyclopropane methodology." Thesis, Imperial College London, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.342180.

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8

Williams, Kenneth Bruce. "The effect of methyl groups on nucleophilic substitution reactions of chlorocyclotriphosphazenes." Diss., Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/49962.

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The reactions of methyl-substituted chlorocyclotriphosphazenes with aryl Grignard reagents and with bifunctional amines, aminoalcohols, and alkoxides were investigated. The characterization data for the compounds formed in the reactions of monomethylpentachlorocyclotriphosphazene and the Grignard reagents were found to be informative with respect to the extent and nature of the interaction between the phosphazene ring and its exocyclic substituents. This interaction was found to be responsible for significant effects on the reactions of the phosphazene ring with nucleophiles. The reactions o

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9

Drury, Christopher John. "Nucleophilic substitution and cyclisation reactions of some polyfluoro-heteroaromatic and polyfluoroaromatic compounds." Thesis, Durham University, 1994. http://etheses.dur.ac.uk/5845/.

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This thesis describes the reactions of some highly fluorinated aromatic and heteroaromatic compounds, in particular derivatives of naphthalene, quinoline and isoquinoline. Chapter 1 provides a general introduction to the preparation, reactions and applications of fluorine containing organic materials. Chapter 2 describes the reactions of some quinoline- and isoquinoline- thiolates with dimethyl acetylenedicarboxylate in an attempt to form six membered heterocycles. Chapter 3 describes nucleophilic substitution reactions of heptafluoro- quinoline and -isoquinoline with sulphur and oxygen nucleo

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10

Donham, Leah L. "Gas-Phase Studies of Nucleophilic Substitution Reactions: Halogenating and Dehalogenating Aromatic Heterocycles." VCU Scholars Compass, 2018. https://scholarscompass.vcu.edu/etd/5645.

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Halogenated heterocycles are common in pharmaceutical and natural products and there is a need to develop a better understanding of processes used to synthesize them. Although the halogenation of simple aromatic molecules is well understood, the mechanisms behind the halogenation of aromatic heterocycles have been more problematic to elucidate because multiple pathways are possible. Recently, new, radical-based mechanisms have been proposed for heterocycle halogenation. In this study, we examine and test the viability of possible nucleophilic substitution, SN2@X, mechanisms in the halogenat

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11

Liu, Jiangqiong. "Kinetic Studies of 6-Halopurine Nucleoside in SNAr Reactions; 6-(Azolyl, Alkylthio and Fluoro)-purine Nucleosides as Substrates for Suzuki Reactions." Diss., CLICK HERE for online access, 2007. http://contentdm.lib.byu.edu/ETD/image/etd1821.pdf.

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12

Dolliver, Debra D. "Mechanisms of Methoxide Ion Substitution and Acid- Catalyzed Z/E Isomerization of N-Methoxyimines." Thesis, University of North Texas, 2001. https://digital.library.unt.edu/ark:/67531/metadc3017/.

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The second order rate constants for nucleophilic substitution by methoxide of (Z)- and (E)-O-methylbenzohydroximoyl fluorides [C6H4C(F)=NOCH3] with various substituents on the phenyl ring [p-OCH3 (1h, 2h), p-CH3 (1g, 2g), p-Cl (1f, 2f), p-H (1e, 2e), (3,5)-bis-CF3 (1i, 2i)] in 90:10 DMSO:MeOH have been measured. A Hammett plot of these rate constants vs σ values gave positive ρ values of 2.95 (Z isomer) and 3.29 (E isomer). Comparison of these rates with methoxide substitution rates for Omethylbenzohydroximoyl bromide [C6H4C(Br)=NOCH3] and Omethylbenzohydroximoyl chloride [C6H4C(Cl)=NOCH3] r

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13

Li, Ho Yin. "Rhodium and iridium-catalysed nucleophilic addition/substitution reactions for the synthesis of lead-like scaffolds." Thesis, University of Leeds, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.634530.

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The research project presented in this thesis aimed to synthesise lead-like scaffolds under array conditions utilizing a novel metal catalysed reaction sequence. The reaction sequence was designed to synthesize libraries of compounds with structural diversity and maximum functional group compatibility in order to aid organic synthesis in modern medicinal industry. The first part of this thesis involved the study of rhodium-catalysed conjugate addition of boronic acids/esters to various Michael acceptors. This methodology has been investigated in order to expand the nucleophile scope to ortho-s

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14

Schory, David Henry. "Quantum Chemical Investigations of Nucleophilic Aromatic Substitution Reactions and Acid Dissociations of Aliphatic Carboxylic Acids." Wright State University / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=wright1253480264.

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15

HADDAD-FAHED, OMAIMA. "Catalyse micellaire de reactions de substitution nucleophile aromatique comportant des reactifs electriquement charges." Paris 6, 1987. http://www.theses.fr/1987PA066419.

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16

Hayes, Roger Nicholas. "A study of some gas phase nucleophilic substitution reactions of carbon, silicon and boron by ion cyclotron resonance mass spectrometry /." Title page, table of contents and summary only, 1985. http://web4.library.adelaide.edu.au/theses/09PH/09phH418.pdf.

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17

Dandekar, Sushama A. "Studies of intramolecular S_RN1 reactions of carbanions derived from 2-(o-halobenzyl)amides and 3-(o-halobenzyl)imides: application to the synthesis of succinimido[3,4-b]indane, a potential anticonvulsant." Diss., Virginia Tech, 1992. http://hdl.handle.net/10919/40096.

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18

Machover, Sarah B. "Understanding the Solvent-free Nucleophilic Substitution Reaction Performed in the High Speed Ball Mill (HSBM): Reactions of Secondary Alkyl Halides and Alkali Metal-Halogen Salts." University of Cincinnati / OhioLINK, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1307043848.

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19

Chae, Hyun Sik. "Applications of nucleophilic substitution and addition reactions of dicationic ruthenium and iridium arene complexes in organic synthesis and materials chemistry /." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2004. http://wwwlib.umi.com/cr/ucsd/fullcit?p3127638.

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20

Brammer, Larry E. "The elucidation of single electron transfer (SET) mechanisms in the reactions of nucleophiles with carbonyl compounds." Diss., This resource online, 1996. http://scholar.lib.vt.edu/theses/available/etd-06062008-151247/.

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21

Mahmood, Tariq. "Aspects of the chemistry of 1,4-naphthoquinones : an investigation of nucleophilic substitution reactions of alkylamines and hydroxyalyklamines on 1,4 napthoquinones and the role of solvent on the position of substitution." Thesis, University of Bradford, 2012. http://hdl.handle.net/10454/5746.

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Nucleophilic substitution reactions of alkylamines, cyclic alkylamines, and hydroxyalkylamines with 5-substituted-1,4-naphthoquinones have been studied. It has been found that the nature of the solvent employed in the reaction influences the position of mono-substitution at either the 2- or 3-position. Although both regioisomers were produced in all the reactions, protic polar solvents favoured the formation of the 3-regioisomer, whereas non-protic solvents favoured the formation of the 2-regioisomer. It has also been found that formation of 2,3-diaminoalkyl derivatives is normally unlikely. A

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22

Xie, Sheng. "Perfluroaryl azides : Reactivities, Unique Reactions and their Applications in the Synthesis of Theranostic Agents." Doctoral thesis, KTH, Organisk kemi, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-172950.

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The work centersaround perfluoroaryl azides (PFAAs), and theirability to undergo certain fast and robusttransformations. The chemistry was furtherappliedfor biomedical applications. The first section focuses on the azide-aldehyde-amine cycloaddition using PFAAs. Experimental and computational investigations uncovered a fast azide-enamine cycloaddition to form triazolines, which spontaneously rearrange into stable amidine products. In addition, this transformation was explored in the formulation of pure nanodrugs. Because this reaction can introduce a phenyl and a perfluoroaryl moiety enabling

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23

Belknap, Ethan M. "Computational Model of the Nucleophilic Acyl Substitution Pathway." Wittenberg University Honors Theses / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=wuhonors1623251026132848.

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24

Fejfar, José Luiz. "Resolução cinética em reações de substituição nucleofílica mediadas por catalisadores por transferência de fase derivados da efedrina, cinchonidina e quinina." Universidade de São Paulo, 2001. http://www.teses.usp.br/teses/disponiveis/46/46135/tde-29112018-120557/.

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Neste trabalho foram estudadas reações de substituição nucleofílica alifática de seis substratos halogenados, na presença de sais quaternários de amônio quirais (catalisadores por transferência de fase), derivados de alcalóides naturais. O sistema usado durante os trabalhos foi o sólido-líquido, sendo utilizado o tolueno como solvente do substrato halogenado. Os eletrófilos escolhidos para este trabalho foram, em sua grande maioria, compostos halogenados na posição alfa à carbonila e o nucleófilo foi o fenilmercapteto de sódio. A estrutura do substratos, as condições de reação e o tipo de cata

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25

SEMRA, ASSIA. "Substitutions nucleophiles en serie arenetricarbonylchrome." Paris 6, 1987. http://www.theses.fr/1987PA066622.

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26

Gimadiev, Timur. "Modèles prédictifs pour les paramètres cinétiques et thermodynamiques des réactions chimiques." Thesis, Strasbourg, 2018. http://www.theses.fr/2018STRAF007/document.

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Ce travail est consacré à la modélisation QSPR des propriétés cinétiques et thermodynamiques des réactions chimiques à l'aide de l'approche Graphe Condensé de Réaction (CGR). Le CGR permet de coder des structures de réactifs et de produits en un seul graphe moléculaire pour lequel des descripteurs moléculaires peuvent être générés.Une base de données contenant plus de 11000 réactions collectées manuellement a été développée puis utilisée dans la modélisation. Les modèles prédictifs ont été construits pour les constantes de vitesse de réactions Diels-Alder, SN2 et E2 ainsi que pour les constant

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27

Parker, David J. "Modelling nucleophilic substitution at main group elements by NMR spectroscopy and X-ray crystallography." Thesis, Open University, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.363493.

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28

Kahef, Lana el. "Oxydation des mesotetraphenyl porphyrines : beta-substitution par voie electrochimique directe." Université Louis Pasteur (Strasbourg) (1971-2008), 1987. http://www.theses.fr/1987STR13221.

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29

Curry, Omadee S. "Reaction of o-Nitrobenzenesulfonyl Azide/n-Butyl Lithium with Hindered Alcohols." Youngstown State University / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1379945812.

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30

Mikosch, Jochen. "Dynamics of anion-molecule reactions at low energy." [S.l. : s.n.], 2007. http://nbn-resolving.de/urn:nbn:de:bsz:25-opus-42129.

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31

LEBBAR, NOUR-EDDINE. "Substitutions differenciees dans le cas de reactions de substitutions nucleophiles radicalaires d'ordre electroinduites sur des derives aromatiques dihalogenes." Paris 6, 1992. http://www.theses.fr/1992PA066215.

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La reaction d'un dihalogenure aromatique avec un nucleophile mou dans les conditions des reactions de substitution nucleophile radicalaire d'ordre un conduit dans le cas general a quatre produits: monohalogene reduit et monohalogene-monosubstitue (monosubstitution), monosubstitue reduit et disubstitue (disubstitution). La competition entre la mono ou la disubstitution depend du mode d'induction (electrochimique ou photochimique) et la nature du nucleophile. L'espece clef du processus est l'anion-radical du produit monohalogene-monosubstitue

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32

Mangion, Bernardino. "Extending and diverting the photochemical nucleophile-olefin combination, aromatic substitution (photo-NOCAS) reaction." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/NQ66652.pdf.

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33

Belaroussi, Rabia. "Synthèse et fonctionnalisation de nouveaux dérivés tricycliques [6-5-6] polyhétéroaromatiques à visée thérapeutique potentielle." Thesis, Orléans, 2016. http://www.theses.fr/2016ORLE2002/document.

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La découverte de nouveaux candidats susceptibles de lutter contre différentes pathologies, en l’occurrence le cancer et les maladies neurodégénératives, constitue l’un des principaux objectifs de notre groupe de recherche. Dans ce contexte, les travaux de cette thèse ont pour but principal, la conception de deux nouvelles classes d’hétérocycles de structure planes, jusqu’à ce jour, très rarement étudiées, à savoir les pyrido[2’,1’ :1,5]pyrazolo[3,4-d]pyridazines et les pyrido[2’,1’ :1,5]pyrazolo[3,4-d]pyrimidines. Ce manuscrit est essentiellement dédié à un travail de méthodologie décrivant le

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34

Chan, Mary S. W. "Factors influencing the regiochemistry of nucleophilic addition to the radical cation of alkenes and dienes studied in the context of the photochemical nucleophile-olefin combination, aromatic substitution (photo-NOCAS) reaction." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp02/NQ36574.pdf.

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35

Moagi, Kgotso Herbet. "Reaction Mechanism of 2-monosubstituted Quinoxalines with Organolithium Compounds : a Theoretical Study." Diss., University of Pretoria, 2020. http://hdl.handle.net/2263/75182.

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This dissertation describes the density functional theory (DFT) computational modelling of reactions between organolithium nucleophiles and various substituted quinoxalines. These reactions result in the functionalisation of the C (sp2)–H bond, thus substituting the sigma-hydrogen. The reactions are known as nucleophilic substitution of hydrogen (SNH) and are used by experimental chemists to form new C–C bonds. The SNH reactions are very important in various industries, e.g. in designing and manufacturing of pharmaceuticals. Quinoxaline is widely used in medicinal chemistry due to its various

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36

Buquoi, John Quentin III. "Exploration Using Reaction Temperature to Tailor the Degree of Order in Micro-Block Copolymer Proton Exchange Membranes." Wright State University / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=wright1274493418.

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37

FRINAULT, THIERRY. "Nouvelles reactions de substitution nucleophile radicalaire en chaine en serie aliphatique fonctionnalisee : synthese d'heterocycles oxygenes et d'imidazoles n-alcoyles." Paris 11, 1990. http://www.theses.fr/1990PA112031.

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Les anions derives de composes beta-dicarbonyles se sont montres des nucleophiles efficaces visa-vis de gem-chloro nitro-alcanes simples ou fonctionnalises dans des reactions de substitution nucleophile radicalaire en chaine. On obtient alors des composes alcoyles hautement fonctionnalises ou des olefines tetrasubstituees bi, tri, ou tetrafonctionnalisees qui, apres des transformations chimiques simples, conduisent a des heterocycles oxygenes: nitrofuranones, spironitrofuranones, butenolides. Les anions de derives fonctionnalises ou non de l'imidazole s'averent des nucleophiles efficaces vis-a

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38

GHARBAOUI, TAWFIK. "Les purines en reaction de substitution nucleophile radicalaire en chaine s#r#n1 : synthese d'une nouvelle famille d'acyclonucleosides." Paris 11, 1991. http://www.theses.fr/1991PA111587.

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Les differentes bases puriques: purine, 6-chloropurine, 6-methoxypurine, 6-aminopurine, 2-amino-6-chloropurine; se sont averees etre de bons nucleophiles dans lesreactions de substitution nucleophile radicalaire en chaine, exceptions faites de l'hypoxanthine et de la guanine qui sont des reducteurs et favorisent fortement la reaction competitive halogenophile s. E. T. On observe une bonne regioselectivite de ces nucleophiles et les produits de substitution sont majoritairement des bases puriques alcoylees en n#9 (l'alcoyle est de type -cn#1r#2no#2 avec r#1, r#2=ch#3, ch#2oh. . . ). Les produit

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39

Chamseddine, Yssam. "Sondes mecanistiques chirales et/ou regioselectivement deuteriees : application a l'etude de quelques processus de substitution nucleophile." Paris 6, 1988. http://www.theses.fr/1988PA066133.

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40

Dlubala, Alain. "Etude de la reactivite de dianions formes par double deprotonation de dithioesters beta-thiosubstitues." Caen, 1987. http://www.theses.fr/1987CAEN2010.

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41

MacMillar, Susanna. "Isotopes as Mechanism Spies : Nucleophilic Bimolecular Substitution and Monoamine Oxidase B Catalysed Amine Oxidation Probed with Heavy Atom Kinetic Isotope Effects." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis (AUU), 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-7441.

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42

Halldin, Stenlid Joakim. "Computational Studies of Chemical Interactions: Molecules, Surfaces and Copper Corrosion." Doctoral thesis, KTH, Tillämpad fysikalisk kemi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-213028.

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The chemical bond – a corner stone in science and a prerequisite for life – is the focus of this thesis. Fundamental and applied aspects of chemical bonding are covered including the development of new computational methods for the characterization and rationalization of chemical interactions. The thesis also covers the study of corrosion of copper-based materials. The latter is motivated by the proposed use of copper as encapsulating material for spent nuclear fuel in Sweden. In close collaboration with experimental groups, state-of-the-art computational methods were employed for the study of

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43

Kulchat, Sirinan. "Dynamic covalent chemistry of C=N, C=C and quaternary ammonium constituents." Thesis, Strasbourg, 2015. http://www.theses.fr/2015STRAF018/document.

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Cette thèse décrit la Chimie Covalente Dynamique (CCD) des échanges imine/imine, Knoevenagel/imine et Knoevenagel/Knoevenagel. La L-proline est un excellent organocatalyseur pour la formation de Bibliothèques Covalentes Dynamiques (BCDs). Cependant, l’interconversion entre des dérivées Knoevenagel de l’acide diméthylbarbiturique et des imines se déroule rapidement sans catalyseur. Une nouvelle classe de CCD basée sur des échanges par substitutions nucléophiles (SN2/SN2’) entre des sels d’ammonium quaternaires et des amines tertiaires est développée, impliquant la catalyse par l’iodure. Les réa

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44

CAPET, MARC. "Synthese d'amines allyliques : oxydation de sulfones." Paris 6, 1986. http://www.theses.fr/1986PA066547.

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L'amination allylique des olefines est catalysee par le cuivre ; application a la synthese de la gabaculine en 4 etapes. Les regio- et stereoselectivite de cette reaction sont comparees a celles de l'acetoxylation de kharasch et de sosnovsky. Des sulfones sont oxydees par des complexes peroxydique du molybdene en hydroxysulfones a squelette carbone symetrique

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45

Alvarez, Gonzalez Eleuterio. "Substitution d'ethers et d'alcools allyliques par differents nucleophiles en presence de complexes de nickel(0) : synthese stereoselective des dienes-1,4 a partir des sulfones dieniques avec le chlorure d'isopropylmagnesium en presence de sels de." Paris 6, 1987. http://www.theses.fr/1987PA066064.

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46

Jund, Rodolphe. "Electrochimie de clusters mixtes tetrametalliques." Université Louis Pasteur (Strasbourg) (1971-2008), 1987. http://www.theses.fr/1987STR13175.

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47

Bogle, Xavier Sheldon. "Dynamic Effects in Nucleophilic Substitution Reactions." Thesis, 2011. http://hdl.handle.net/1969.1/ETD-TAMU-2011-12-10313.

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In order to rationally optimize a reaction, it is necessary to have a thorough understanding of its mechanism. Consequently, great effort has been made to elucidate a variety of reaction mechanisms. However, the fundamental ideas needed to understand reaction mechanisms are not yet fully developed. Throughout the literature, one encounters numerous examples of experimental observations that are not explainable by conventional mechanistic ideas and methods. The research described in this dissertation employs a unique approach towards the identification and analysis of systems whose observations

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48

MALMBERG, SEAN MAGNUS. "Nucleophilic Catalysis of Brominated Butyl Rubber Substitution Reactions." Thesis, 2009. http://hdl.handle.net/1974/5257.

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The allylic bromide functionality within brominated poly(isobutylene-co-isoprene), or BIIR, is amenable to substitution by a wide range of nucleophiles. The objective of this work was to gain insight into the dynamics of these substitution reactions, and to develop methods for accelerating these processes. Of particular interest was the reactivity of exomethylene (Exo-Br) and bromomethyl (BrMe) isomers found within BIIR toward various nucleophiles, and catalytic techniques for affecting the proportion of these isomers. BIIR isomerization can be catalyzed through ionic chemistry involving so

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49

林謙芳. "Nucleophilic Substitution Reactions of Oxa-Cages with Allyltrimethylsilane and Triethylsilane." Thesis, 2002. http://ndltd.ncl.edu.tw/handle/89018175920475199669.

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碩士<br>國立交通大學<br>應用化學系<br>90<br>Abstract The reaction of the trioxa-cage compounds 4, 10, 14, 23, 28 with allyltrimethylsilane and triethylsilane gave the corresponding compounds 5, 6, 11, 15, 24. Their stereochemistry can be determined by H,H-COSY and NOE experiments. Ozonolysis of the diol compound 17 gave the tetraoxa-cage compound 18. Doubled nucleophilic substitution reaction of 18 with allyltrimethylsilane gave linear trioxatriquinane derivative compound 19. The double nucleophilic substitution reactions of oxa-cage compound 32, only gave mono-substituted

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Hsin-I, Hsieh, and 謝馨儀. "Nucleophilic Substitution Reactions of5-Bromo-4-sulfur-substituted 5,6-Dihydro-2-Pyridones." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/45763674896989364064.

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碩士<br>輔仁大學<br>化學系<br>93<br>This thesis mainly studied the substitution reactions of bromo compound 5 and its sulfone derivative 19 with carbon nucleophiles, and explored the reactivity, solvent effect, and regioselectivity of the reaction. Compounds 5 or 19 underwent nucleophilic substitution reactions with dimethyl malonate anion,acetylacetone anion, ethyl acetoacetate anion, and dimethyl cuprate in a SN2' fashion. Aromatic derivative 21 underwent nucleophilic substitution reaction only with dimethyl malonate anion to give product 23, whereas its reaction with other nucleophiles yielded only

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