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Dissertations / Theses on the topic 'Halogenation Reactions'

Author: Grafiati
Published: 5 June 2025
Last updated: 1 August 2025

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Consult the top 16 dissertations / theses for your research on the topic 'Halogenation Reactions.'

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1

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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2

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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3

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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4

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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5

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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6

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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7

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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8

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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9

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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10

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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11

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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12

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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13

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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14

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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15

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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16

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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