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Dissertations / Theses on the topic 'Amidyl radical'

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Published: 5 June 2025
Last updated: 2 August 2025

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1

Peacock, Joanne Linda. "Synthesis of nitrogen heterocycles via amidyl radical cyclisations." Thesis, University of Warwick, 1998. http://wrap.warwick.ac.uk/108362/.

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Intramolecular radical additions to alkenes have become increasingly popular in synthetic organic chemistry as a means for constructing cyclic arrays. The majority of work has focused upon the reactions of carbon-centred radicals but nitrogen radical cyclisations can provide an effective route to forming a variety of N-heterocycles. Cyclisation of nucleophilic aminyl radicals can be problematic due to their potential reversibility so the more electrophilic amidyl radicals were used for this investigation. O-Benzoyl hydroxamic acid derivatives proved to be suitable precursors for forming the de
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2

Shah, Hitesh. "Studies of aminyl radicals." Thesis, Loughborough University, 1999. https://dspace.lboro.ac.uk/2134/26945.

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This section contains a brief overview of alkyl radicals in synthesis and methods for their generation. The aminyl radical section gives a brief description of the nature of the radical and then proceeds with general techniques used, or now abandoned, for aminyl radical formation. It also reviews amidyl, aminium cation and Lewis acid metal complexed aminyl radicals describing their superiority over neutral aminyl radicals. Various methodologies are also described using aminyl radicals in the synthesis of heterocyclic and natural products.
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3

Mills, Tim. "Studies in free radical chemistry." Thesis, University of Nottingham, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.342465.

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4

Pedersen, Jan Mondrup. "Amides as radical precursors in heterocyclic chemistry." Thesis, Loughborough University, 2005. https://dspace.lboro.ac.uk/2134/34502.

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In this project the use of amides as precursors for imidoyl radicals in heterocyclic chemistry has been developed. Amides were converted to thioamides, which function as precursors for imidoyl radical equivalents. Also, a novel protocol for the synthesis of imidoyl selanides was developed for the purpose of using these as imidoyl radical precursors. The precursors were used in a study of intramolecular oxidative cyclisation of imidoyl radicals onto electron deficient pyrroles and indoles. The imidoyl radical equivalents derived from thioamides did not cyclise onto heteroarene double bonds. In
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5

Donati, Nicola. "Rhodium and iridium coordinated aminyl radicals : synthesis and catalytic applications /." Zürich : ETH, 2007. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=16946.

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6

Lewis, Kirk Alexander. "Stereoselective synthesis using aminyl radicals derived from α-amino acids". Thesis, Loughborough University, 1997. https://dspace.lboro.ac.uk/2134/32976.

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Chapter 1 is the introduction to the thesis. It contains an overview of amino acids and aminyl radicals. The amino acids section includes material on their synthesis through traditional methods and asymmetric syntheses, as well as the use of radical reactions in their formation. The aminyl radical section gives a description of the nature of the radical and then proceeds with general techniques for aminyl radical formation. A more detailed account of our own group's use of sulfenamides and imines in aminyl radical formation is ·covered and the chapter is ended with a look at the work of aminyl
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7

Toon, Richard Clive. "A study of directed cleavage of aziridinylcarbinyl radicals." Thesis, Loughborough University, 1998. https://dspace.lboro.ac.uk/2134/13710.

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The work described in this thesis is an investigation into the reactivity and possible synthetic applications of aziridinylcarbinyl radicals. These radicals rapidly rearrange via β cleavage, which can proceed by breakage of either the CoN or C-C bond. Cleavage of the latter has been found when the molecule has a phenyl stabilising group attached to the aziridine ring. Chapter I is a review of the known radical reactions involving aziridines whilst chapter 2 discusses the various methods of aziridine syntheses. Chapter 3 outlines the project aims with reference to the potential of directed clea
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8

Clark, D. N. "Generation of aminyl radicals and use in the synthesis of nitrogen heterocycles." Thesis, Loughborough University, 1994. https://dspace.lboro.ac.uk/2134/33025.

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The purpose of this project was to show that aminyl radicals (nitrogen atoms with one unpaired electron) could be generated from the radical reactions between tri-n-butyltin hydride and sulfenamides. Sulfenamides are defined as a divalent sulfur atom bonded to a trivalent nitrogen atom. A wide range of sulfenamides were prepared in good yield using two methods. Benzenesulfenyl chloride and primary or secondary amines were reacted at room temperature with triethylamine as base to yield sulfenamides. Sulfenamides were also synthesised in good yield from the reaction between amines and N-(benzene
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9

Large, Jonathan Martin. "A radical cyclisation approach to kainoids and related nitrogen heterocycles." Thesis, University of York, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.313877.

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10

Huang, Huanming. "Radical cyclisation cascades triggered by electron-transfer to amide derivatives." Thesis, University of Manchester, 2017. https://www.research.manchester.ac.uk/portal/en/theses/radical-cyclisation-cascades-triggered-by-electrontransfer-to-amide-derivatives(c743a30d-3f82-4cf1-bda3-d8191567cc8d).html.

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Radical cyclisation and cyclisation cascades are a powerful synthetic approach for the formation of multiple carbon-carbon bonds to generate complex carbo and heterocyclic architectures in synthetic chemistry. Radical cyclisation and cyclisation cascades triggered by electron transfer reduction to amide-type carbonyls have been demonstrated for the first time. In one step, simple achiral barbiturates can be converted to hemiaminal or enamine-containing tricyclic scaffolds or unprecedented spirotetracyclic architectures containing up to five contiguous stereocentres (including quaternary stereo
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11

Dahlgren, Björn. "On the aqueous reactions of the aminyl radical with molecular oxygen and the superoxide anion." Thesis, KTH, Skolan för kemivetenskap (CHE), 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-147521.

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Two key routes of the oxidation of ammonia is the reaction between the aminyl radical with molecular oxygen and superoxide. Fundamental insights in its oxidation is of great importance to both our understanding of atmospheric chemistry, biological effects as well as the safety assessments in nuclear industry. The gas phase reactions differ largely in rate compared to the aqueous reactions. In this work, the mechanism for the aqueous reactions have been studied computationally using ab initio quantum chemical calcultions. Reaction barriers have been quantified and compared with experimental dat
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12

Morin, Aurélie. "Controlled radical polymerization of vinyl esters and vinyl amides : experimental and theoretical studies." Thesis, Toulouse, INPT, 2013. http://www.theses.fr/2013INPT0117/document.

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Ces travaux de thèse portent sur la polymérisation radicalaire contrôlée (PRC) des esters et amides de vinyle. L’une des possibilités de contrôle est le piégeage dynamique réversible des chaînes radicalaires croissantes (P•) par un agent de contrôle (T) formant une espèce dormante (P─T’). La concentration en radicaux dans le milieu peut alors diminuer dramatiquement de sorte que les réactions indésirables de terminaisons soient négligeables et que le contrôle de la masse molaire des polymères soit atteint avec un faible indice de dispersité. L’utilisation de complexes métalliques, pouvant s’ox
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13

Svejstrup, Thomas. "Visible light-mediated synthesis of nitrogen-containing molecules : photoredox generation of amidyl and aminium radicals and nitrile oxides." Thesis, University of Manchester, 2018. https://www.research.manchester.ac.uk/portal/en/theses/visible-lightmediated-synthesis-of-nitrogencontaining-molecules-photoredox-generation-of-amidyl-and-aminium-radicals-and-nitrile-oxides(c8134c85-2bcd-4441-84da-0553a2769477).html.

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Nitrogen-centred radicals (NCRs) are a versatile class of reaction intermediates that can lead to useful synthetic transformations. Classical generation of NCRs requires pre-functionalised precursors that can be difficult to access and requires harsh reaction conditions in the formation of the NCR itself, which had limited synthetic application and interest. With the emergence of visible-light mediated photoredox catalysis as a method for the generation of radicals, interest in NCRs has been renewed. In this thesis, the generation of amidyl and aminium radicals is demonstrated and their applic
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14

Daoust, Benoit. "Réactivité des radicaux amidyle, imidyle et carbamyle vis-à-vis des oléfines." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq26378.pdf.

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15

Daoust, Benoit. "Réactivité des radicaux amidyle, imidyle et carbamyle vis-à-vis des oléfines." Sherbrooke : Université de Sherbrooke, 1997.

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16

El, Dib Gisèle Chakir Abdelkhaleq. "Dégradation atmosphérique des composés organiques volatils carbonyles (amides, aldéhydes aromatiques) par le radical nitrate et l'atome de chlore et réactivité atmosphérique du radical benzylperoxyle." Reims : S.C.D. de l'Université, 2006. http://scdurca.univ-reims.fr/exl-doc/GED00000952.pdf.

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17

Tolando, Roberto. "Probing the mechanism of the cytochrome P-450 catalysed dealkylation of amides." Thesis, Open University, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.389317.

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18

Hassan, Haitham. "Total synthesis of eucophylline : a free-radical approach towards total synthesis of cytotoxic leucophyllidine." Thesis, Bordeaux, 2016. http://www.theses.fr/2016BORD0153/document.

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La thèse décrit la première synthèse totale de l'Eucophylline, le fragment sud de l'alcaloïde Leucophyllidine récemment isolé à partir de Leuconotisgriffithii et L. eugenifolius. La synthèse en 10 étapes comprend une nouvelle méthode d’accès au squelette azabicyclo[3.3.1]nonane par un processus de carbooximation radicalaire d'oléfines à trois composants. Au cours de ces études, nous avons également isolé des énamines présentant des stabilités inhabituelles résultant de leur conformation bicyclique tendue. La synthèse de la partie éburnane, le fragment nord de la Leucophyllidine, a été réalisée
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19

El, Dib Gisèle. "Dégradation atmosphérique des composés organiques volatils carbonyles (amides, aldéhydes aromatiques) par le radical nitrate et l’atome de chlore et réactivité atmosphérique du radical benzylperoxyle." Reims, 2006. http://theses.univ-reims.fr/exl-doc/GED00000952.pdf.

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L’objectif de la thèse est de définir le devenir atmosphérique de quelques COV utilisés dans différents secteurs industriels ou produits directement dans la troposphère lors de l’oxydation d’autres COV. Nous avons étudié la dégradation du radical benzylperoxyle, d’une série d’amides (N-diméthyl formamide, N-diméthyl acétamide, N-méthylpyrrolidinone, N-diméthyl proprionamide) et d’une série d’aldéhydes aromatiques (2,4-diméthyl benzaldéhyde, 2,5-diméthyl benzaldéhyde, 2,6-diméthyl benzaldéhyde, 3,4-diméthyl benzaldéhyde et 3,5-diméthyl benzaldéhyde). Pour réaliser ce travail différentes techniq
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20

Gaudreault, Philippe. "Études sur les précurseurs et la réactivité des radicaux amidyles." Mémoire, Université de Sherbrooke, 2006. http://savoirs.usherbrooke.ca/handle/11143/4728.

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Les travaux qui sont décrits dans les pages qui suivent constituent ce qui a été accompli au cours de ma maîtrise. Ils ont porté sur l'étude de précurseurs et de la réactivité des radicaux amidyles. Plus spécifiquement, nous nous sommes intéressés à la cyclisation de ceux-ci sur des insaturations qui a pour effet la formation d'hétérocycles azotés par la création d'un lien carbone-azote. Une grande partie de ces travaux s'est concentrée sur la cyclisation de radicaux amidyles primaires. Plusieurs précurseurs ont été étudiés dans ce but. L'un d'eux s'est avéré efficace et ceci nous a poussé [i.
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21

Gaudreault, Philippe. "Études sur les précurseurs et la réactivité des radicaux amidyles." [S.l. : s.n.], 2006.

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22

Itsenko, Oleksiy. "Photoinitiated Radical Carbonylation Using [11C]Carbon Monoxide : 11C-Labelling of Aliphatic Carboxylic Acids, Esters, and Amides." Doctoral thesis, Uppsala universitet, Kemiska institutionen, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-6021.

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One-step photoinitiated free radical carbonylation was employed for the rapid (5–7 min) labelling of aliphatic carboxylic acids, esters, and amides with a short-lived positron emitter 11C (t½ = 20.3 min) at the carbonyl position. The labelled compounds were synthesized from alkyl iodides (0.05–0.1 mmol), [11C]carbon monoxide, and appropriate nucleophiles. Decay-corrected radiochemical yields were up to 74%; conversion of [11C]carbon monoxide reached 85–90%; specific radioactivity was 158–192 GBq/mmol. The labelled compounds were identified and characterized using HPLC, LC-MS, and 1H and 13C NM
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23

Wen, Zhiwei. "Azido- and Triazolyl-modified Nucleoside/tide Analogues: Chemistry, Fluorescent Properties, and Anticancer Activities." FIU Digital Commons, 2018. https://digitalcommons.fiu.edu/etd/3789.

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Two classes of C5 azido-modified pyrimidine nucleosides were synthesized and explored as radiosensitizers. The 5-azidomethyl-2'-deoxyuridine (AmdU) was prepared from thymidine and converted to its cytosine counterpart (AmdC). The 5-(1-azidovinyl) modified 2'-deoxyuridine (AvdU) and 2'-deoxycytidine (AvdC) were prepared employing regioselective Ag-catalyzed hydroazidation of 5-ethynyl pyrimidine substrates with TMSN3. AmdU and AmdC were converted to 5'-triphosphates AmdUTP and AmdCTP, and incorporated into DNA-fragments via polymerase-catalyzed reaction during DNA replication and base excision
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24

Syrstad, Erik Alan. "Neutralization-reionization mass spectrometry and computational studies of hydrogen atom adducts to the amide bond /." Thesis, Connect to this title online; UW restricted, 2004. http://hdl.handle.net/1773/11612.

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25

Gennet, Dominique. "Etude de nouvelles réactions radicalaires : applications à la synthèse d'alcaloi͏̈des." Palaiseau, Ecole polytechnique, 2004. http://www.theses.fr/2004EPXX0013.

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26

Gennet, Dominique. "Etude de nouvelles réactions radicalaires : Application à la synthèse d'alcaloïdes." Phd thesis, Ecole Polytechnique X, 2004. http://pastel.archives-ouvertes.fr/pastel-00000808.

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La chimie des radicaux azotés permet d'obtenir d'une manière simple et rapide de nombreux types d'alcaloïdes. Au cours de ce travail, une nouvelle voie d'accès aux 2-imidazolines, précurseurs de diamines vicinales et d'imidazoles, utilisant des radicaux amidinyles et des composés stannylés a été étudiée, puis étendue à des transferts de groupes autres que l'atome d'hydrogène. Dans un deuxième temps, une nouvelle méthode de création de radicaux amidyles par voie photochimique basée sur l'utilisation de xanthates d'hydroxamyle a également été développée. Enfin, une synthèse de l'aspidospermidine
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27

Bernier, Caroline. "Étude de précurseurs de radicaux amidyles et de l'oxydation électrochimique du 5-aminoindole." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/mq26539.pdf.

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28

Bernier, Caroline. "Étude de précurseurs de radicaux amidyles et de l'oxydation électrochimique du 5-aminoindole." Sherbrooke : Université de Sherbrooke, 1997.

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29

Mudgal, Mukesh M. Dr. "Insight Into the Inhibition of Ribonucleotide Reductases by 2'-chloro-2'-deoxynucleotides and 2'-azido-2'-deoxynucleotides: Biomimetic Studies with Model Substrates." FIU Digital Commons, 2016. http://digitalcommons.fiu.edu/etd/2597.

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Ribonucleotide Reductases (RNRs) are crucial enzymes that catalyze reduction of ribonucleotides to deoxyribonucleotides, required for the biosynthesis of DNA. Vital role played by RNR in the biosynthesis of DNA and its control on cell growth made it one of the main targets for anticancer therapy. Several laboratories clarified the aspects of reaction cascades at active site of RNR. Biochemical studies of RNR by Stubbe for the inactivation of RDPR by 2'-chloro-2'-deoxyuridine-5'-diphosphate emphasizes departure of chlorine as an anion, while biomimetic studies by Robins with 6'-O-nitro-2'-chlor
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30

Itsenko, Oleksiy. "Photoinitiated Radical Carbonylation Using [11C]Carbon Monoxide : 11C-Labelling of Aliphatic Carboxylic Acids, Esters, and Amides." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis: Univ.-bibl. [distributör], 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-6021.

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31

Fan, Weijia. "Design and Utilization of New Organotellurium Chain Transfer Agents for Advanced Polymer Synthesis." Kyoto University, 2019. http://hdl.handle.net/2433/242914.

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32

Júnior, Antonio Carlos Roveda. "Reatividade química de um novo nitrosilsulfito complexo trans-[Ru(NH3)4(isn)(N(O)SO3)](PF6), e desenvolvimento de filmes de amido doadores de óxido nítrico." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/75/75135/tde-26072016-144608/.

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Na busca por novos materiais doadores de óxido nítrico (NO), o presente trabalho descreve o desenvolvimento de um filme à base de amido de mandioca, no qual foi incorporado um nitrosilo complexo de rutênio, e o estudo da liberação de NO nesse material. O nitrosilo complexo trans-[Ru(NH3)4(isn)NO](BF4)3 (RuNOisn; isn = isonicotinamida) apresenta a propriedade de liberar NO de forma controlada, por meio de fotólise (λirr = 310-370 nm) e de redução química. A incorporação desse complexo em filmes de amido foi realizada em condições brandas, resultando em um novo material para o armazenamen
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33

Beaume, Aurore. "Nouveaux accès à des polycycles azotés et carbonés par cascades radicalaires et réactions multi-composants." Paris 6, 2007. http://www.theses.fr/2007PA066285.

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Les cyclisations radicalaires en cascade de précurseurs insaturés conduisent à des polycycles complexes. La cyclisation radicalaire d’ynamides a été utilisée comme étape clé dans la synthèse totale de la mappicine, un alcaloïde polycyclique naturel. Les N-acylcyanamides, analogues azotés des ynamides, ont aussi été engagés dans des cascades radicalaires. La portée et le mécanisme de cette cascade ont été étudiés, notamment grâce à une modélisation faisant appel aux calculs DFT, et une chimiothèque a été synthétisée. La première synthèse totale par voie radicalaire sans étain de la luotonine A
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34

Pelloux, Nadia. "Mécanisme de fixation d'amines aromatiques cancérogènes sur l'ADN : étude à l'aide de systèmes modèles." Grenoble 1, 1992. http://www.theses.fr/1992GRE10167.

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Le n-acetyl-2-aminofluorene et le 2-aminofluorene sont des cancerogenes, qui apres activation metabolique, reagissent avec les nucleophiles de l'adn, et plus particulierement sur l'atome de carbone c-8 de la guanine. Nous avons etudie le mecanisme de fixation de ces cancerogenes sur la desoxyguanosine en utilisant une approche intramoleculaire qui permet de modeliser le complexe d'intercalation cancerogene-base forme dans la phase initiale qui precede la reaction de fixation covalente du cancerogene sur l'adn. Une etude solvolytique de ces composes en milieu aqueux a montre que l'adduit forme
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35

Amiel, Catherine. "Etude expérimentale de la transition sol-gel." Paris 6, 1986. http://www.theses.fr/1986PA066323.

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36

Potin-Gautier, Martine. "Photoamidation d'olefines fluorees, en milieu homogene et en milieux microemulsions non aqueux." Toulouse 3, 1987. http://www.theses.fr/1987TOU30011.

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Les amides perfluores et mixtes (a doubles chaines hydrogenee et perfluoree) sont des precurseurs de tensioactifs susceptibles d'ameliorer les proprietes des mousses extinctrices, par diminution de la tension interfaciale entre l'eau et l'huile par un meilleur etalement de la mousse. Ces amides sont synthetises par photoamidation d'olefines : r::(f)-ch=ch::(2), r::(f)-ch=ch-r::(h), r::(f)-ch::(2)-ch=ch-r::(h) dans le t-butanol et dans des microemulsions de formamide
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37

YE, RU-LONG, and 葉儒隆. "The study of asymmetric radical cyclization involving carbon radicals carrying asymmetric a-ester of a-amide groups." Thesis, 1991. http://ndltd.ncl.edu.tw/handle/65811272705285114560.

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38

Yi-JieHuang and 黃奕傑. "The Applications of Sulfonyl Radical on The Synthesis of 2-Quinolinones from N-aryl Amides and Quinolines from N-aryl Enamines." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/42836009015597216859.

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碩士<br>國立成功大學<br>化學系<br>104<br>Recently, there has been a growing interest in the application of free radical cyclization reactions to the formation of ring systems. Free radical reactions mediated by sulfonyl radicals have been noted by several groups. Free radical of sulfonyl radical can undergo addition reaction with unsaturated bond generate radical intermediate to undergo either 6-membered or 5-membered ring cyclization onto the aromatic ring effectively and provide synthetically useful methods for the syntheses of 2-quinolinones and quinolines. This thesis is divided into two parts：(1) Th
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39

Hidasová, Denisa. "Asymetrická tandemová konjugovaná adice lithného amidu/radikálové reakce a jejich aplikace v totální syntéze přírodních látek." Doctoral thesis, 2019. http://www.nusl.cz/ntk/nusl-436925.

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This thesis deals with single-electron transfer (SET) radical processes mediated by ferrocenium hexafluorophosphate and TEMPO and their application in the total synthesis of natural products. Asymmetric aminooxygenation methodology for the synthesis of anti-β-amino-α-hydroxy acid derivatives has been developed by utilizing a highly diastereoselective aza-Michael addition of chiral lithium amides to various α,β-unsaturated esters or amides/SET oxidation/radical α-oxygenation. The potential of this methodology was demonstrated in short total syntheses of the anti-β-amino-α-hydroxy acid fragments
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