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Dissertations / Theses on the topic 'Halogenatio Reactions'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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1

Benmansour, Hadjar. "Palladium catalysed reactions of halogenated heterocycles." Thesis, Durham University, 2001. http://etheses.dur.ac.uk/4948/.

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1- The synthesis of unusually substituted halo-fluoroheterocycles has been achieved. 2,4,6-Tribromo-3,5-difluoropyridine and 4-bromo-2,3,5,6-tetrafluoropyridine were prepared from pentafluoropyridine, aluminium bromide and hydrogen bromide Reactions with lithium halides allowed the preparation of 4-iodo-2,3,5,6- tetrafluoropyridine, 4-iodo-2,6-dibromo-3,5-difluoropyridine, 4-iodo-2,3,5,6- tetrafluoropyridine and 4-chloro-2,6-dibromo-3,5-difluoropyridine.2- Reactions of 2,4,6-tribromo-3, 5-difluoropyridine with nucleophiles showed that selective substitution at the C-F centre can be achieved us

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2

Mashino, Michio. "Photoinduced Chemical Reaction of Halogenated Hydrocarbons." 京都大学 (Kyoto University), 2004. http://hdl.handle.net/2433/147629.

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3

Palau, Lluch Gerard. "alpha,beta-difunctionalization of alpha,beta-unsaturated carbonyl compounds through borylation reaction." Doctoral thesis, Universitat Rovira i Virgili, 2015. http://hdl.handle.net/10803/311620.

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Aquesta tesi presenta resultats referits a noves metodologies aplicades cap a la obtenció de productes alfa-funcionalitzats i beta-borilats, que no tenen precedents en la bibliografia, a partir de cetones alfa,beta-insaturatdes. Les funcionalitzacions estudiades han sigut utilitzant fluor, per obtenir alfa-fluoro beta-boryl cetones; halogens, per obtenir alfa-halo beta-boryl cetones (sent els halogens clor i brom); i finalment difuncionalitzar cetones alfa,beta-insaturades per obtenir alfa-aryl beta-boryl cetones, que tal i com es reporta a la tesi, han sigut els intermedis cap a la sintesi de

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4

Yeung, Chi-shun, and 楊智淳. "The experimental and AB initio studies of the photolysis of selected tribromo-compounds and the water assisted dehalogenation reactions of selected isotribromo-compounds." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2014. http://hdl.handle.net/10722/206479.

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The photochemistry of several tribromo-compounds, R−CBr3 (R = CH2OH, CH2OC(O)CF3, COOH) have been studied by utilizing nanosecond transient absorption (ns-TA) and femtosecond transient absorption spectroscopy. Femtosecond transient absorption experiments showed that isomer species R−CBr2−Br were formed after excitation of R−CBr3 within several picoseconds. The absorption band of the isomers R−CBr2−Br showed a strong solvent dependence upon changing the solvent from cyclohexane to acetonitrile. The absorption wavelength of the proposed isomer intermediates and the spectral shift in cyclohexane

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5

Minton, Mary Amanda. "Reactions of Halogenated Ethylenes on the alpha-Cr2O3 (1012) Surface." Diss., Virginia Tech, 2006. http://hdl.handle.net/10919/29014.

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The thermally induced reaction of halogenated ethylenes on the Î±-Cr<sub>2</sub>O<sub>3</sub> (10 2) single crystal surface results in the formation of gas phase hydrocarbons including acetylene, ethylene, butadiene, and dihydrogen, and deposition of surface chlorine adatoms. No surface carbon or combustion products are observed in any reactions indicating no thermally induced C-C bond cleavage occurs and surface lattice oxygen is not incorporated into surface intermediates. Thermal desorption spectroscopy indicates that in all halogenated ethylene reactions acetylene is the major product, r

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6

Huang, Jinqing, and 黃普卿. "A study of the reaction mechanisms and reactive intermediates involved in halogenated compounds : trichloroethylene oxide, halogenated benzophenones, and halogenated quinoline-based phototriggers." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2014. http://hdl.handle.net/10722/208036.

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UV/Vis absorption spectroscopy (UV/Vis), femtosecond transient absorption spectroscopy (fs-TA), nanosecond transient absorption spectroscopy (ns-TA), and nanosecond time-resolved resonance Raman spectroscopy (ns-TR3), as well as density functional theory (DFT) computations were employed to study the mechanisms and the intermediates in reactions of selected halogenated compounds, including trichloroethylene oxide (TCE oxide), halogenated benzophenones (4-FBP, 4-ClBP, 4-BrBP, 3-FBP, 33’-DFBP, 3-ClBP, 3-BrBP, 2-FBP, 2-ClBP, and 2-BrBP), and halogenated quinoline-based phototriggers (BHQ-OPh and B

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7

Vipond, Alison. "Laboratory studies of reactions of some halogenated species in the atmosphere." Thesis, University of Oxford, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.301791.

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8

Guan, Xiangguo. "The photochemistry of polyhalomethanes in water and the water-catalyzed dehalogenation reactions of selected isopolyhalomethanes, halogenated methanols and halogenated formaldehydes." Click to view the E-thesis via HKUTO, 2006. http://sunzi.lib.hku.hk/hkuto/record/B38718960.

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9

Guan, Xiangguo, and 官向國. "The photochemistry of polyhalomethanes in water and the water-catalyzed dehalogenation reactions of selected isopolyhalomethanes,halogenated methanols and halogenated formaldehydes." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2006. http://hub.hku.hk/bib/B38718960.

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10

Foley, Loraine Johanna. "Photochemically induced reactions between ozone and halogenated species : a matrix isolation study." Thesis, University College London (University of London), 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.369260.

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11

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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12

Itoh, Nobuya. "STUDIES ON THE HALOGENATION REACTIONS CATALYZED BY THE HALOPEROXIDASES FROM CALDARIOMYCES FUMAGO AND CORALLINA PILULIFERA." Kyoto University, 1987. http://hdl.handle.net/2433/78187.

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13

Tillu, V. H. "Synthesis of thiaprostaglandins and some organic transformations like oxidative halogenation protection deprotection and multicomponent reactions." Thesis(Ph.D.), CSIR- National Chemical Laboratory, Pune, 2006. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/3829.

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14

Blight, John. "A study of the reactions of some halogenated ethanes on silica-supported copper." Thesis, Brunel University, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.357701.

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15

Petzold, Daniel [Verfasser], and Burkhard [Akademischer Betreuer] König. "Visible Light Mediated Oxidative Halogenation Reactions and Reductive Liberation of Fluorophosgene / Daniel Petzold ; Betreuer: Burkhard König." Regensburg : Universitätsbibliothek Regensburg, 2020. http://d-nb.info/1210701987/34.

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16

Kale, S. M. "Halogenation and isomerization reactions of aromatics over K-L, H-Beta and H-Zsm-5 zeolite catalysts." Thesis(Ph.D.), CSIR-National Chemical Laboratory, Pune, 2002. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/2530.

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17

Jaramillo-Fellin, Donna Marie. "Reactions of halogenated compounds on Pd(111) studied by LITD-FTMS, TPD, and FT-RAIRS /." For electronic version search Digital dissertations database. Restricted to UC campuses. Access is free to UC campus dissertations, 2002. http://uclibs.org/PID/11984.

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18

Niefer, B. I. (Bernadette Irene) Carleton University Dissertation Chemistry. "The dynamics in the reaction of oxygen(even singlet-D) with various halogenated methanes." Ottawa, 1990.

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19

Inomata, Satoshi. "Spectroscopic measurement of halogenated vinoxy radicals and mechanism for the reactions of haloethylenes with atomic oxygen." 京都大学 (Kyoto University), 2003. http://hdl.handle.net/2433/149574.

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20

Ferreira, Bruno Ricardo Vilachã. "Estudos visando a uma nova abordagem para a sintese total da (+)-Napalilactona, um sesquiterpeno halogenado isolado de fonte marinha." [s.n.], 2005. http://repositorio.unicamp.br/jspui/handle/REPOSIP/250228.

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Orientador: Fernando Antonio Santos Coelho<br>Dissertação (mestrado) - Universidade Estadual de Campinas, Instituto de Quimica<br>Made available in DSpace on 2018-08-07T03:08:23Z (GMT). No. of bitstreams: 1 Ferreira_BrunoRicardoVilacha_M.pdf: 1423792 bytes, checksum: 7de8ab5e57971637382e0a11e87dbdf0 (MD5) Previous issue date: 2005<br>Resumo: Napalilactona e Patilactona A são dois sesquiterpenóides espirolactônicos isolados de fontes marinhas. Esses sesquiterpenos, biogeneticamente derivados de um esqueleto carbônico do tipo aristoleno, apresentam em suas estruturas quatro centros estereogên

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21

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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22

Tiwari, Rohit. "COMPUTATIONAL AND SYNTHETIC STUDIES ON ANTIMETABOLITES FOR ANTICANCER-, ANTIVIRAL-,AND ANTIBIOTIC DRUG DISCOVERY." The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1267819591.

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23

Chaumette, Jean-Louis. "Synthèse asymétrique d'acides α-halogénés par halogénation diastéréosélective d'acétals de cétènes silylés ; addition asymétrique d'alcools sur des cétènes α-halogénés". Rouen, 1996. http://www.theses.fr/1996ROUES052.

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Le potentiel des hydrates de carbones et plus particulièrement des acétals du glucose lorsqu'ils sont utilisés en tant qu'auxiliaires chiraux dans une réaction de synthèse asymétrique a été montré au cours de ce travail : il a été utilisé comme inducteur de chiralité pour la synthèse d'acides α-halogénés. Ainsi l'halogénation diastéréoselective d'acétals de cétènes trialkyl silylés dérivés du glucose permet d'accéder aux (S)-2-chloro-acides avec des excès énantiomèriques allant jusqu'à 95% et aux (S)-2-bromoacides avec une pureté énantiomèrique allant jusqu'à 85%. D'autre part, l'addition asym

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24

Legoupy, Stéphanie. "Synthèse et réactivité de nouveaux complexes organométalliques chiraux du rhénium." Rennes 1, 1997. http://www.theses.fr/1997REN10148.

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Le travail présenté dans ce mémoire concerne la synthèse et la réactivité de complexes du rhénium. De nouveaux complexes organométalliques chiraux du rhénium des alcools propargyliques et homoallylique ont été synthétisés. Des alcools allyliques secondaires et 1,2-disubstitues ont été coordonnés à l'entité chirale (#5C#5H#5)Re(No)(Pph#3)#+Bf#4#-. Dans le cas du 3-buten-2-ol complexe, les deux diastéréoisomères ont pu été séparés. L'étude de la réactivité de ces complexes du rhénium a montré qu'ils sont compatibles avec des réactions d'oxydation, de Wittig, de réduction, d'estérification, de ch

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25

Tang, Datong. "Chemistry of highly halogenated cyclopentadiene dimers and cages /." 2002. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:3039059.

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26

Hardas, Nitin Ramkrishna. "Halogen tagging derivatization reactions and analysis of halogenated hydrocarbons by gas chromatography element specific detection." 1998. https://scholarworks.umass.edu/dissertations/AAI9823743.

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Atomic plasma emission spectroscopy provides a versatile element-specific detection tool for gas chromatography. Element selective detection has many applications in the field of petrochemical, environmental, pesticide and industrial analysis. It affords the analysis of compounds of interest in relatively complex samples, as the element selective response can flag compounds containing specific elements even if such compounds are co-eluting with other compounds. This dissertation research has been focused on the applications of GC-AED coupled with sample derivatization techniques for the analys

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27

MORRISON, MATTHEW. "A Convenient Synthesis of Pyrrolnitrin and Related Halogenated Phenylpyrroles." Thesis, 2009. http://hdl.handle.net/1974/5265.

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This thesis details a straightforward synthetic route to the antifungal compound pyrrolnitrin 1.2, along with several analogous halogenated phenylpyrroles. The proposed synthetic protocol involved the Suzuki-Miyaura cross-coupling of appropriately halogenated pyrrole pinacolboronate esters and aryl compounds. In the efforts towards preparing the cross-coupling partners, we report a regiospecific and high yielding synthesis of a 3-chloro pyrrole compound 2.14, its brominated analog 2.16, an iodinated analog 2.17, and the corresponding pinacolboronate ester 2.18. We also report a generalized re

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28

Liu, Shui-Te, and 劉水德. "PART(I):Halogenation of 2-Anilino-1,4-Naphthoquinoes With Copper(II) Halids PART(II):5-Phenylpentenes In Free Radical Reactions." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/60077039871725641018.

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29

Liu, Shui-De, and 劉水德. "PART(I):Halogenation of 2-Anilino-1,4-Naphthoquinoes With Copper(II) Halids PART(II):5-Phenylpentenes In Free Radical Reactions." Thesis, 1998. http://ndltd.ncl.edu.tw/handle/06112566658534312231.

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30

Wang, Yen-Jhung, and 汪彥璋. "1.Application of Halogenated Benzyl Ether in Carbohydrate Chemistry2.Iron-Catalyzed Cross-Coupling Reaction of Formamides with Thiols." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/88670261212170566024.

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碩士<br>國立中興大學<br>化學系所<br>101<br>The first part of this thesis, we introduce the halogenated benzyl ether as a new protecting group carbohydrate chemistry. First, the combination of palladium acetate (1.0 mol%) and Josiphos (1.0 mol%) can be used as a powerful catalytic system to form C-S bond between halogenated benzyl ethers with thiols. Interestingly, the resulting thioether-containging benzyl group can be selectively removed and afforded the corresponding alcohols. In the second part of this thesis, we report that iron dichloride can be used as a catalyst for the coupling reaction of thiols

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31

Li, Liao. "Chemical Forays of Fungal Metabolites." Phd thesis, 2018. http://hdl.handle.net/1885/148782.

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This thesis contains six chapters and the research presented within focuses on three parts. The first part (chapter one to three) was the isolation of antibacterial and antioxidant mushroom metabolites, and the synthesis towards analogues of discovered natural products. The following part (chapter four) was to assess antioxidant activities of synthetic compounds and investigate their SAR (structure-activity relationship), by use of a developed DPPH assay. The last part (chapter five to six) was the discovery of an abiotic halogenation reaction among a class of fungal metabolites, azaphilones.

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32

Wang, Chunrong. "Prehydrated Electron and Its Role in Ionizing Radiation Induced DNA Damage and Molecular Mechanisms of Action of Halogenated Sensitizers for Radiotherapy of Cancer." Thesis, 2012. http://hdl.handle.net/10012/7101.

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Despite advances in technology and understanding of biological systems in the past two decades, modern drug discovery is still a lengthy, expensive, difficult and inefficient process with low rate of new therapeutic discovery. The search for new effective drugs remains a somewhat empirical process. There is compelling need for a more fundamental, mechanistic understanding of human cancers and anticancer drugs to design more appropriate drugs. Radiotherapy is still the major therapy of cancer. It uses high-energy ionizing radiation such as x-rays and charged particle beams to destroy cancer ce

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33

Tomé, Sara Mirassol. "Synthesis of flavonoid-type compounds and sugar-substituted phenolics of pharmacological importance." Doctoral thesis, 2021. http://hdl.handle.net/10773/31390.

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Flavonoids are a large class of secondary metabolites widespread in the Plant Kingdom. These natural organic compounds possess a prominent interest as therapeutic agents. Among the vast range of biological properties of both natural and synthetic derivatives are their antioxidant and anti-inflammatory activities. Among the naturally occurring oxygen containing heterocyclic compounds, flavones (2-arylchromones) assume pronounced importance due to both their spread and diverse abundance as well as their well-known wide range of pharmacological properties. Halogenated derivatives of

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