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Dissertations / Theses on the topic 'Tautomerism'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Loghmani-Khouzani, Hossein. "Investigations of tautomerism in 2- and 4- ketomethylquinolines." Thesis, University of Bradford, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.281216.

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2

Kazantsev, Andriy [Verfasser]. "Nucleobase tautomerism in codon-anticodon decoding / Andriy Kazantsev." Hamburg : Staats- und Universitätsbibliothek Hamburg Carl von Ossietzky, 2020. http://d-nb.info/1236695275/34.

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3

郭富超 and Fu-chiu Kwok. "A systematic study of heterocyclic keto-enol tautomerism and the observation of mechanistic change in the hydrolysis of someheterocyclic vinyl ethers." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1987. http://hub.hku.hk/bib/B31230908.

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4

Kwok, Fu-chiu. "A systematic study of heterocyclic keto-enol tautomerism and the observation of mechanistic change in the hydrolysis of some heterocyclic vinyl ethers /." [Hong Kong : University of Hong Kong], 1987. http://sunzi.lib.hku.hk/hkuto/record.jsp?B1234560X.

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5

Lamont, R. Brian. "Studies of ring-chain tautomerism and molecular conformation by X-ray crystallography." Thesis, Queen's University Belfast, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.335988.

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6

Moosavi, Mehr Seyed Hessam. "Novel structures and unusual reactivity powered by tautomerism and electron delocalization in salicylimines." Thesis, University of British Columbia, 2017. http://hdl.handle.net/2429/62701.

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7

Hare, Patrick Michael. "Excited state dynamics in DNA base monomers the effects of solvent and chemical modification on ultrafast internal conversion /." Columbus, Ohio : Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1166623261.

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8

McGeorge, Gary. "NMR studies of solid nitrogen-containing dyestuffs." Thesis, Durham University, 1996. http://etheses.dur.ac.uk/5197/.

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This thesis is concerned with the structural analysis of dyestuffs in their natural solid state by the application of solid-state nuclear magnetic resonance. These dysetuffs are all derived from the phenylazobenzene group, but tautomerism can produce structural changes, which have so far been uncharacterised in the solid-state for many of the dyestuffs currently under investigation. The information obtainable from (^13)C and (^15)N chemical shifts, both isotropic and anisotropic will be applied in this structure determination. Under magic-angle spinning the anisotropic nature of solid-state in

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9

Moustras, Marios Zacharias. "Imine formation relating to cross-linking in cellular macromolecules." Thesis, University of Exeter, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.260620.

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10

Shibl, Mohamed F. "Mechanisms of double proton tautomerization & quantum control of tautomerism in enantiomers by light." kostenfrei, 2006. http://www.diss.fu-berlin.de/2006/622/index.html.

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11

郭伯章 and Bozhang Guo. "NMR spectroscopic and kinetic studies on acyclic and homocyclic enols." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1988. http://hub.hku.hk/bib/B31231135.

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12

Elder, David. "Physicochemical and crystallographic investigations into the salt formation of two heterocyclic drugs." Thesis, University of Edinburgh, 1992. http://hdl.handle.net/1842/8721.

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Salt formation provides a means of altering the physicochemical and resultant biological characteristics of a drug entity without modifying its molecular structure. Many published reviews have indicated the importance of the selection of the most appropriate salt form. This work is an investigation into the salt formation of two heterocyclic drugs. This is done by the physicochemical and the crystallographic studies of 19 high resolution single crystal diffraction studies. The particular targets of the work are the selection of the most appropriate salt forms, investigations into the tautomeri

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13

Guo, Bozhang. "NMR spectroscopic and kinetic studies on acyclic and homocyclic enols /." [Hong Kong : University of Hong Kong], 1988. http://sunzi.lib.hku.hk/hkuto/record.jsp?B12352366.

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14

Peng, Chunte Sam. "Two-dimensional infrared spectroscopy of nucleic acids : application to tautomerism and DNA aptamer unfolding dynamics." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/91113.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Chemistry, 2014.<br>Cataloged from PDF version of thesis. Vita.<br>Includes bibliographical references.<br>The structural dynamics of nucleic acids are intimately related to their biological functions; however, our ability to study these molecular dynamics has been largely impeded by the lack of techniques that possess both high time resolution and structural sensitivity. The motivation for the work in this thesis was to develop and apply two-dimensional infrared spectroscopy (2D IR) as a new experimental tool to investigate

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15

Silva, Edvonaldo Florêncio e. "Um Estudo teórico da doxorrubicina: espectroscopia no UV/Vis e reatividade." Pós-Graduação em Química, 2013. https://ri.ufs.br/handle/riufs/6100.

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The doxorubicin (DOX) assumes a prominent position among the drugs widely applied in treatment human cancer. This chemotherapeutic presents efficiency in the regression of various neoplasms, although adverse reactions may occur. As a result several strategies have been developed to reduce the adverse effects caused by the continued use of DOX. One of these strategy is the incorporation of doxorubicin into MOF (Metal Organic Framework), since these materials can act as excellent carriers of drugs. The color change exhibited by doxorubicin as a function of pH, or even possibly when adsorbed in

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16

Da, Chenxiao. "The Development and Applications of the HINT Scoring Function: Exploring Colchicine-Site Anticancer Agents and Tautomerism." VCU Scholars Compass, 2013. http://scholarscompass.vcu.edu/etd/3002.

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The overall aim of this work was to apply HINT, an empirical scoring function based on the understanding of hydrophobicity, to analyze and predict the binding affinities and biological activities of colchicine-site anticancer agents. The second, concurrent aim was to improve the scoring function by incorporating tautomerism within the modeling process. Our belief is that proper evaluation of tautomeric forms for small molecules will improve performance of virtual screening. The novel pyrrole-based compounds targeting the colchicine site were docked into the receptor using HINT as a rescoring

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17

Greenwood, Jeremy R. "Pyridazinediones and amino acid receptors theoretical studies, design, synthesis and evaluation of novel analogues /." [Sydney : J. Greenwood], 1999. http://www.pharmacol.usyd.edu.au/thesis.

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Thesis (Ph. D.)--Dept. of Pharmacology, University of Sydney, 1999.<br>Title from title screen. Interactive three dimensional molecular data and multiple colour images. Text presented in Hypertext Markup Language (.htm); images in standard formats (.jpg, .gif); molecules presented mostly as Cambridge Protein Data Bank format (.pdb); some molecules presented in alternative X. Mol cartesian co-ordinates format (.xyz); search facility in PERL script. Includes bibliographical references. A printed form was produced with limited features as a Faculty requirement; may also be issued in CD-ROM.

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18

Dolai, Ramapada [Verfasser], and Hans-Jörg [Akademischer Betreuer] Krüger. "Switching of Electronic States of Cobalt Dioxolene Complexes Triggered by Spin-Crossover Process and Valence Tautomerism / Ramapada Dolai ; Betreuer: Hans-Jörg Krüger." Kaiserslautern : Technische Universität Kaiserslautern, 2020. http://d-nb.info/1204425434/34.

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19

黃友民 and Youmin Huang. "NMR spectroscopic and kinetic studies on secondary enamines of heterocyclic oximes hydrazones and semicarbazones." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1991. http://hub.hku.hk/bib/B31232243.

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20

Greenwood, Jeremy R. (Jeremy Robert) 1971. "Pyridazinediones and amino acid receptors theoretical studies, design, synthesis and evaluation of novel analogues." [Sydney : J. Greenwood], 1999. http://www.pharmacol.usyd.edu.au/thesis.

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Title from title screen. Interactive three dimensional molecular data and multiple colour images. Text presented in Hypertext Markup Language (.htm); images in standard formats (.jpg, .gif); molecules presented mostly as Cambridge Protein Data Bank format (.pdb); some molecules presented in alternative X.Mol cartesian co-ordinates format (.xyz); search facility in PERL script. Includes bibliographical references. Text, numeric and representational data System requirements: for text, any standard web browser on any platform, Netscape 2.x or higher, Internet Explorer 3.x or higher; for molecular

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21

Holroyd, Leo. "Mutagenicity of 5-bromouracil : quantum chemical study." Thesis, University of St Andrews, 2015. http://hdl.handle.net/10023/7063.

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This thesis describes a computational investigation of the mutagenicity of 5-bromouracil (BrU). In Chapter 1, three models of spontaneous and BrU-induced base mispairing (rare tautomer, wobble pair, and ion) are reviewed. Chapter 2 presents the computational techniques used: electronic structure methods (Hartree–Fock-based and density functional theory) and molecular dynamics. Chapter 3 presents optimisations of the keto and enol tautomers of BrU and uracil (U) in water clusters. The enol tautomer of BrU is found to be more stable than that of U. Chapter 4 is a molecular dynamics study of the

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22

Schade, Alexander. "Synthese und Charakterisierung von enolisierbaren Barbituratfarbstoffen als Sensoren für Nukleinbasenderivate." Doctoral thesis, Universitätsbibliothek Chemnitz, 2016. http://nbn-resolving.de/urn:nbn:de:bsz:ch1-qucosa-215808.

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In dieser Arbeit wird die Synthese neuartiger 5-monosubstituierter Barbituratfarbstoffe mit elektronenziehenden Substituenten in 5-Position beschrieben. Durch diese Funktionalisierung entstehen schaltbare Farbstoffe mit einer farblosen Ketoform und einer farbigen Enolform. Die Einflüsse verschieden stark elektronenziehender Substituenten sowie unterschiedlich großer konjugierter π-Systeme auf die Keto-Enol-Tautomerie wurden untersucht. Dies erfolgt einerseits mittels Röntgeneinkristallstrukturanalysen der Festkörper und andererseits mit solvatochromen Untersuchungen in Lösung. Durch die Keto-E

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23

M'BOUNGOU-M'PASSI, ATHANASE. "Tautomerie enantioselective de photoenols." Reims, 1993. http://www.theses.fr/1993REIM5014.

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Au cours de ce travail, nous avons effectue l'irradiation d'un ester alpha,beta-insature a temperature variable, pour rechercher les points isocinetique et d'iso-inversion de la reaction de protonation asymetrique du photodienol. Nous avons aussi developpe une nouvelle voie de synthese asymetrique permettant d'acceder en milieu neutre a des cetones chirales. Selon cette methode, un photoenol est genere a partir d'une cetone aromatique ayant un hydrogene en gamma suivant la reaction de norrish ii. L'induction asymetrique est obtenue par tautomerie de l'enol intermediaire, en presence d'une quan

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24

Greenwood, Jeremy Robert. "Pyridazinediones and amino acid receptors: theoretical studies, design, synthesis, and evaluation of novel analogues." Thesis, The University of Sydney, 1999. http://hdl.handle.net/2123/394.

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http://www.pharmacol.usyd.edu.au/thesis This thesis is primarily concerned with a class of chemical compounds known as pyridazinediones, being 6-membered aromatic rings containing two adjacent nitrogen atoms (pyridazine), doubly substituted with oxygen. In particular, the work focuses on pyridazine-3,6-diones, derivatives of maleic hydrazide (1). Understanding of the chemistry of these compounds is extended, using theoretical and synthetic techniques. This thesis is also concerned with two very important classes of receptors which bind amino acids in the brain: firstly, the inhibitory GABA re

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25

Greenwood, Jeremy Robert. "Pyridazinediones and amino acid receptors: theoretical studies, design, synthesis, and evaluation of novel analogues." University of Sydney, Department of Pharmacology, 1999. http://hdl.handle.net/2123/394.

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http://www.pharmacol.usyd.edu.au/thesis This thesis is primarily concerned with a class of chemical compounds known as pyridazinediones, being 6-membered aromatic rings containing two adjacent nitrogen atoms (pyridazine), doubly substituted with oxygen. In particular, the work focuses on pyridazine-3,6-diones, derivatives of maleic hydrazide (1). Understanding of the chemistry of these compounds is extended, using theoretical and synthetic techniques. This thesis is also concerned with two very important classes of receptors which bind amino acids in the brain: firstly, the inhibitory GABA re

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26

Baldasare, Corey Adam. "Quantum Chemical pK_a Estimation of Carbon Acids, Saturated Alcohols, and Ketones via Quantitative Structure-Activity Relationships." Wright State University / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=wright1598550823525731.

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27

Guven, Alaettin. "Potentially tautomeric pyridazino(4, 5-b)indolones." Thesis, University of East Anglia, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.306148.

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28

Lannes, Anthony. "Chimie de coordination de radicaux nitronyl-nitroxyde pontants pour l’élaboration de matériaux magnétiques moléculaires : synthèse, structures cristallines, propriétés magnétiques et spectroscopie électronique." Thesis, Lyon 1, 2014. http://www.theses.fr/2014LYO10173/document.

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Au cours des dernières décennies, l'électronique s'est développée de manière à répondre au besoin grandissant de stocker et traiter toujours plus d'information, et elle a évolué de manière incessante vers une miniaturisation extrême. Dans ce contexte, les molécules-aimants, qui sont des entités moléculaires magnétiques, présentent une bistabilité magnétique permettant de stocker l'information dans des unités de la taille d'une molécule. Le principal frein aux applications tient aux basses températures auxquelles ces molécules présentent de telles propriétés (< 15K). Il est donc important de

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29

Celik, Bayar Caglar. "Theoretical Investigation Of Tautomeric Equilibria In Certain Explosive Materials." Phd thesis, METU, 2012. http://etd.lib.metu.edu.tr/upload/12615630/index.pdf.

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Explosive materials have always been attracting the attention of scientists. Various explosives either in pure bulk form or as admixtures are synthesized and investigated from different points of view. However, because of dangerous character of these materials, their syntheses and properties have to be forecasted by theoretical studies. The new research trends of explosive materials generally include the designs of novel derivatives of well&ndash<br>known explosives to improve their detonation performances (heats of explosion, detonation velocities and detonation pressures) and thermal stabi

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30

Walli, Adam. "Biomimetic Copper(I)-Mediated Activation of Dioxygen and Redox Non-Innocence in Copper(II) Complexes of Bis(oxazoline)s." Doctoral thesis, Niedersächsische Staats- und Universitätsbibliothek Göttingen, 2014. http://hdl.handle.net/11858/00-1735-0000-0023-9636-9.

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31

Sevastik, Robin. "Quantum chemical moceling of enzymatic reactions : applications to the tautomerase superfamily." Licentiate thesis, KTH, School of Biotechnology (BIO), 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4702.

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<p><i>In this thesis, quantum chemical methods are used to investigate enzymatic reaction mechanisms. The Density functional theory, in particular the hybrid B3LYP functional, is used to model two enzymes belonging to the tautomerase superfamily; 4-Oxalocrotonate Tautomerase (4-OT) and cis-Chloroacrylic Acid Dehalogenase (cis-CAAD). The methodology is presented and new mechanistic insights for the two enzymes are discussed.</i></p><p><i>For 4-OT, two different models are built and the potential energy curves are computed. This allows the methodology to be evaluated. The results give new insigh

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32

Sevastik, Robin. "Quantum chemical modeling of enzymatic reactions : applications to the tautomerase superfamily." Licentiate thesis, Stockholm : Bioteknologi, Biotechnology, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4702.

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33

Henze, Rüdiger. "Tautomérisation énantiosélective d'un énol." Rouen, 1997. http://www.theses.fr/1997ROUES020.

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La réaction de l'aldéhyde 2-benzylacrylique avec des acides thiocarboxyliques donne accès à de nouveaux énols métastables. Leur conformation a été étudiée en utilisant des calculs semi-empiriques et des méthodes spectroscopiques. Des calculs AM1 ont révélé que la conformation préférée du Z-éthanethioate de 2-benzyl-3-hydroxy-2-propényle en absence de solvants fait intervenir une interaction intramoléculaire entre les groupements hydroxyle et carbonyle du thioester. Une étude par IR et par RMN a montré que la conformation du Z-1-benzènecarbothioate de 2-benzyl-3-hydroxy-2-propényle était dépend

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34

Lecourt, Constance. "Chimie de coordination du manganèse(II) à partir de radicaux nitronyl nitroxyde et de macrocycles thiacalix[4]arènes : tautomérisme de valence et luminescence." Thesis, Lyon, 2019. http://www.theses.fr/2019LYSE1173.

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La chimie de coordination de l’ion manganèse(II), à partir de radicaux nitronyl nitroxyde et de macrocycles thiacalix[4]arènes, a mis en évidence des propriétés magnétiques et optiques remarquables au sein de ses complexes. Ces matériaux moléculaires ont la particularité de manifester leurs propriétés sous l’application de stimuli externes. Ainsi, un composé lamellaire à base de polymères de coordination bidimensionnels d’ions Mn(II) et de radicaux nitronyl nitroxyde, a révélé une conversion de tautomérisme de valence induite thermiquement, et des complexes polynucléaires d’ions Mn(II)−sulfony

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35

Élise, Sabrina. "Synthèse et caractérisation de bis(oxazolidines) dérivées du tris(hydroxyméthyl)aminométhane pour la conception de prodrogues de répulsifs naturels." Phd thesis, Université de la Réunion, 2011. http://tel.archives-ouvertes.fr/tel-00686915.

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La réévaluation des impacts toxicologique et environnemental des répulsifs synthétiques conduit à reconsidérer les répulsifs d'origine naturelle pour la prévention des maladies transmises par les insectes (dengue, chikungunya, paludisme,...). Cette étude se rapporte aux structures de type bis(oxazolidine) envisagées comme prodrogues de répulsifs naturels par leur conversion avec le tris(hydroxyméthyl)aminométhane (TRIS). Différents protocoles et voies de synthèse ont été étudiés sur une série représentative d'aldéhydes pour définir l'étendue et les limites de l'approche permettant de concentre

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36

AMIEL, PASCALE. "Tautomerie et dithioalkylations du 2,5-dimercapto-1,3,4-thiadiazole : synthese de nouveaux heterocycles : 2-thione-n(3)-acridinyl-5-alkyltio-1,3,4-thiadiazoles : activites antiparasitaires et anticancereuses de quelques derives thiadiazoles." Aix-Marseille 2, 1994. http://www.theses.fr/1994AIX22955.

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37

Bosc, Jean-Jacques. "Etudes en série 2-amino-2-oxazolines : action d'isocyanates, synthèse, réactivité, étude physico-chimique et pharmacologique." Bordeaux 2, 1994. http://www.theses.fr/1994BOR2B001.

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38

Pulst, Martin [Verfasser]. "1,2,3-Triazole : Ionenleitung, Tautomerie und Defekte in Kristallen des Poly(ethylenoxid)s ; [kumulative Dissertation] / Martin Pulst." Halle, 2019. http://d-nb.info/1179184440/34.

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39

Gupta, Yashi. "Understanding the Role of Macrophage Migration Inhibitory Factor (MIF) and its Homologue D-Dopachrome Tautomerase (DDT) in Cancer." Case Western Reserve University School of Graduate Studies / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=case1497113473427922.

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40

Rocha, Valéria Alves. "Síntese e estudo estrutural de azo-enaminonas." Programa de Pós-Graduação em Química da UFBA, 2006. http://www.repositorio.ufba.br/ri/handle/ri/10018.

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Submitted by Edileide Reis (leyde-landy@hotmail.com) on 2013-04-23T14:14:08Z No. of bitstreams: 1 Valeria Rocha.pdf: 3157080 bytes, checksum: 5aeb84b9943c3f42e20393e8ad4cdcee (MD5)<br>Made available in DSpace on 2013-04-23T14:14:08Z (GMT). No. of bitstreams: 1 Valeria Rocha.pdf: 3157080 bytes, checksum: 5aeb84b9943c3f42e20393e8ad4cdcee (MD5) Previous issue date: 2006<br>As azo-enaminonas pertencem a uma classe particular de enaminonas obtidas pela incorporação de um grupo azo (N=N), proveniente de sal de diazônio, ao sistema conjugado N-C=C-C=O da porção enaminona, e constituem uma nova

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41

Schulte, Wibke Karin [Verfasser]. "D-Dopachrome tautomerase (D-DT) : functional homologue or cross-regulator of macrophage migration inhibitory factor (MIF)? / Wibke Karin Schulte." Aachen : Hochschulbibliothek der Rheinisch-Westfälischen Technischen Hochschule Aachen, 2012. http://d-nb.info/1019235020/34.

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Hofer, Luisa [Verfasser], and Stefan [Akademischer Betreuer] Endres. "Die Rolle des Macrophage-migration-inhibitory-factor-Homologs D-dopachrome tautomerase im murinen Tumormodell / Luisa Hofer. Betreuer: Stefan Endres." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2015. http://d-nb.info/1076242952/34.

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43

García, Ortega Héctor. "Porfirinas solubles en agua: Síntesis, homoasociación y propiedades fotofísicas de porfirinas sulfonadas 5,15-difenilsustituidas." Doctoral thesis, Universitat de Barcelona, 2003. http://hdl.handle.net/10803/2784.

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El trabajo reporta el estudio realizado sobre 5,15-difenilporfirinas sulfonadas. La sulfonación de la 5,15-difenilporfirina (DPP) con H2SO4 conc. procedió sobre la posición C2 del anillo de porfirina y en las posiciones <i>para</i> de los anillos fenílicos obteniéndose las porfirinas 2-sulfonato-5,15-bis(4-sulfonatofenil)porfirina (DPPS3), 5,15-bis(4-sulfonatofenil)porfirina (DPPS2A), 5-fenil-2-sulfonato-15-(4-sulfonato-<br/>fenil)porfirina (DPPS2B), 15-fenil-5-(4-sulfonatofenil)porfirina (DPPS1A) y <br/>2-sulfonato-5,15-difenilporfirina (DPPS1B). Al utilizar H2SO4 fumante (30% SO3) la sulfona

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44

Wessner, Rachael Ann. "Theoretical Estimation of pKa’s of Pyrimidines and Related Heterocycles." Wright State University / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=wright1469798346.

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45

Dobosz, Robert. "Badanie równowag tautomerycznych w roztworach dikarbonylowych pochodnych 2-metylopirydyny i jej benzologów." Rozprawa doktorska, [Nakł.aut.], 2007. http://dlibra.utp.edu.pl/Content/128.

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W pracy przebadano pod kątem tautomerii 24 związki (w tym 15 nieopisanych wcześniej w literaturze). Były to p-diketony o różnej budowie (alicykliczne, pierścieniowe - pięcio-, sześcio-, siedmioczłonowe) podstawione w pozycji 2 pierścieniem heterocyklicznym (pirydyl-2-yl, chinolin-2-yl)

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46

CASTELLI, SILVIA. "Catterizzazione della dna topoisomerasi I umana e della sua interazione con il farmaco antitumorale camptotecina." Doctoral thesis, Università degli Studi di Roma "Tor Vergata", 2005. http://hdl.handle.net/2108/202651.

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La topoisomerasi I eucariotica è un enzima monomerico, il quale catalizza il rilassamento del DNA durante importanti processi cellulari, che comprendono la replicazione, la trascrizione, la ricombinazione e la condensazione cromosomica. La topoisomerasi I umana è composta di 765 amminoacidi e la struttura cristallografica della proteina priva del dominio N-terminale, insieme ad esperimenti di proteolisi hanno mostrato che la proteina è composta di quattro differenti domini: il dominio N-terminale (residui 1-214), il dominio core (residui 215635), il dominio linker (residui 636-712) e il domin

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47

Elacqua, Elizabeth. "Supramolecular chemistry of molecular concepts: tautomers, chirality, protecting groups, trisubstituted olefins, cyclophanes, and their impact on the organic solid state." Diss., University of Iowa, 2012. https://ir.uiowa.edu/etd/3447.

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The research presented in this thesis is founded upon the ability to mimic Nature by using highly directional forces to influence self-assembly, while achieving the formation of desired supramolecular structures. The successful engineering of such solids relies upon a full comprehension of supramolecular synthons, so as to apply them to design complex architectures. We have studied synthon formation in multifunctional pharmaceutical solids. Through the formation of salts and co-crystals, we uncovered a role of tautomers in the salt – co-crystal continuum. From a solid-state perspective, one ca

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Hlimi, Fouzia. "Cycloaddition de diarylnitrilimines sur des dérivés de la benzodioxine 1,4 et de la benzoxazine-1,4 : regiochimie de la réaction sur un alcene portant un groupe donneur et un groupe accepteur sur la même extrêmité." Besançon, 1987. http://www.theses.fr/1987BESA2018.

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La cycloaddition dipolaire 1,3 des diarylnitrilimines sur le benzodioxinne-1,4 carboxylate-2 d'ethyle conduit a des cycloadduits qui apres ouverture donnent des derives de l'aryloxy-4 diphenyl-1,3 pyrazole qui ne sont pas accessibles par une methode classique de synthese de pyrazoles

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LOPPINET, SERANI ANNE. "Etude d'un catalyseur bifonctionnel tautomerique : la 2-(1h)-pyridone. equilibre de tautomerie, synthese de chaines polyamides aromatiques pour l'habillage du catalyseur, activite catalytique." Paris 6, 1997. http://www.theses.fr/1997PA066444.

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Le travail presente dans ce memoire est une etude de catalyseurs de la famille des catalyseurs bifonctionnels tautomeriques. Ces catalyseurs ont comme particularite importante d'avoir de nombreux points communs avec les enzymes. C'est en raison de telles proprietes que nous nous sommes interessees a la 2-(1h)-pyridone en particulier ainsi qu'a certain de ses derives. Ces catalyseurs bifonctionnels tautomeriques mettent en jeu, lors de l'etape de catalyse, leur deux formes tautomeres. Il s'agissait donc tout d'abord de connaitre le mieux possible cet equilibre de tautomerie avant de commencer t

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Gledhill, Karl, L. E. Rhodes, M. Brownrigg, et al. "Prostaglandin-E2 is produced by adult human epidermal melanocytes in response to UVB in a melanogenesis-independent manner." Wiley, 2010. http://hdl.handle.net/10454/4579.

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no<br>Erythema occurs in human skin following excessive exposure to ultraviolet radiation (UVR), and this is in part mediated by the vasodilator prostaglandin E2 (PGE2). While keratinocytes are a major source of this pro-inflammatory eicosanoid, epidermal melanocytes (EM) also express some of the cellular machinery required for PGE2 production. The primary aim of this study is to determine whether EM can produce PGE2 and so potentially also contribute to UVR-induced skin inflammation. Furthermore, we investigate the likely pathway by which this PGE2 production is achieved and investigate wheth

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