Dissertations / Theses on the topic 'Époxydes – Composés – Synthèse'
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Maraval, Martine. "Synthèse de composés furanniques à chaîne latérale bifonctionnelle par voie organosiliciée." Toulouse, INPT, 1989. http://www.theses.fr/1989INPT023G.
Full textPorcu, Bernardi Elisabeth. "Cyclotetrapeptides analogues de la chlamydocine et de l'HC-toxine à visée thérapeutique." Montpellier 2, 1991. http://www.theses.fr/1991MON20153.
Full textYangkou, Mbianda Xavier. "Synthèse d'analogues de la phosphomycine." Montpellier 2, 1995. http://www.theses.fr/1995MON20234.
Full textMonfort, Nicolas Bernard. "Application de l'époxyde hydrolase d'Aspergillus niger à la synthèse préparative de précurseurs énantiopurs de composés antifongiques de type triazole." Aix-Marseille 2, 2005. http://www.theses.fr/2005AIX22009.
Full textMouledous, Gérard. "Synthèse de polyols phosphones précurseurs de polyuréthanes." Montpellier 2, 1997. http://www.theses.fr/1997MON20254.
Full textLaurent, Philippe. "Synthèse de molécules difonctionnelles hautement fluorées." Montpellier 2, 1992. http://www.theses.fr/1992MON20061.
Full textGembus, Vincent. "Sur quelques utilisations d'époxydes en synthèse organique : nouvelles voies d'accès au tocophérol et synthèse formelle de la borrélidine." Université Louis Pasteur (Strasbourg) (1971-2008), 2006. https://publication-theses.unistra.fr/public/theses_doctorat/2006/GEMBUS_Vincent_2006.pdf.
Full textWith the aim of preparing tocopherol (Vitamin E) from bulk chemicals as citral, linalool and dihydromyrcen, the condensation of trimethyhydroquinone with these terpenic derivatives has been reexamined. Suitable conditions have found and both the chroman and the chromen that formed, respectively, have been converted in the target molecule by means of epoxidation – Al(Oi-Pr)3 promoted isomerization – Wurtz like coupling sequence. Besides, an efficient bis-functionnalization of dihydromyrcen has been realized by performing sequentially an epoxidation and a chlorosulfanylation. The vinylic sulfides obtained has been converted into either dehydroisophytol and a dehydrophytylsulfone respectively by a piperidine induced Mislow-Evans rearrangement of corresponding sulfoxides and DBU isomerisation of a vinylic sulfone. Next, efficient conditions have been discovered to selectively rearrange a sulfonated cyclobutanediol, itself derived from the Yang cyclisation product of 2,3-pentanedione into a cyclopropyl ketosulfone. This paves the was for a short synthesis of tocopherol from 2-pentene and geranylacetone. Finally, enantiomerically hydroxysulfone has been prepared by mean of a very simple desymetrization process of a prochiral diol with an enzyme. Repeated condensation of this sulfone with the (R)-epoxide of 2-butene-1,4-diol has been successfully accomplished, with the result of a very short, highly stereoselective synthesis of the Morken polypropionate intermediate to borrelidine ; this has to be considered as a formal synthesis of this antibiotic macrolide
Grelet, Danielle. "Ouverture d'époxydes par la triphénylphosphine en milieu phénolique." Montpellier 2, 1990. http://www.theses.fr/1990MON20244.
Full textNguyen, Dinh Vu. "Synthèse de composés antidépresseurs et anticancéreux - Contribution méthodologique à la réactivité des époxydes et des dérivés organiques du bismuth." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLS374/document.
Full textMy PhD thesis mainly involves the enantioselective synthesis of the Milnacipran's analog, a trisubstituted cyclobutane bearing two contiguous stereogenic centers. We have devised a conventional approach which consists of an intramolecular SN2 cyclization. After an acidic treatment, the key intermediate lactone was isolated with an ee > 99%, which was converted to the Milnacarre with no erosion of the ee value. We have also interested in the nanometric formulation of Podophyllotoxine derivatives. The natural product was designed to bear a hydrophilic and hydrophobic side chain. Its micellar solution was evaluated in vitro, in vivo and the obtained resuls were shown to be promising.We have also studied two methodologies: the reactivity of glycidyl ether toward alkyllithium reagents and oxydation of hydroxylamines to nitrone using triphenylbismuth carbonate. We observed in the former case an original rearrangement of the substrate to a vicinal diol, while in the latter case we have developped a mild condition to perform an tandem oxydation/1,3-dipolar cycloaddition in situ with a strained alkyne
Pullez, Maddalena. "Etudes sur la synthèse totale de la macrolactine A." Université Louis Pasteur (Strasbourg) (1971-2008), 2004. http://www.theses.fr/2004STR13001.
Full textThe overall aim of this Ph. D work is the total synthesis of macrolactin A. Macrolactin A is a 24-membered polyene macrolide exhibiting antiviral activity against type I and II Herpes simplex and against HIV. Until now only a few total and partial synthesis were reported. A new and convergent synthesis of C12-C24 fragment has been achieved during the Ph. D research period. This synthesis has been accomplished using consecutive organometallic additions to aldehydes and the novel application of eliminative reduction to introduce the E,E-diene moiety. The synthesis features the application of chiral sulfoxides and the novel use of a versatile 1,3-diol synthon. The two stereogenic centers of the anti-1,3-diol synthon were introduced utilizing a chiral starting epoxide and the diastereoselective reduction of a β-hydroxyketone. One of the key step of the synthesis of this synthon is the functional transformation of a protected homoallylic alcohol into a α-hydroxyketone with KMnO4. The chiral center of C23 was introduced by the diastereoselective reduction of a β-ketosulfoxide. The reductive elimination with sodium amalgama offered an efficient and highly stereoselective mean to introduce directly in one step the C16-C19 (E,E) diene. Our approach furnished the C12-C24 fragment of macrolactin A in 14 steps and 6% overall yield. Studies on the upper part of the molecule are still in course
Caille, Dominique. "Synthèse et propriétés de réseaux à base d’époxy et d'isocyanate." Lyon, INSA, 1991. http://www.theses.fr/1991ISAL0060.
Full textThe purpose of this thesis is to study the networks obtained from the reaction between a diepoxy and a diisocyanate. This materials possess two chemical species which are the oxazolidone bifunctional resulting from the addition reaction between an epoxy and an isocyanate. The second species is the isocyanurate, tridimensional, derived from the trimerization of the isocyanate groups. The preliminary study by DSC and FTIR leads· to identification of the temperature range of the two heterocycles formation reaction , By HPLC and NMR, the study of model mono functional molecules shows that there is a competition between the two reactions described above and the homopolymerization of the epoxy groups present in the reaction mixture. The viscoelastic properties of the networks are determined using the polymers obtain from a diepoxy and a diisocyanate. These mechanical properties are interesting but decrease rapidly high temperatures in the presence of oxygen. The network structures before and after oxidation are studied by 13C NMR wîth Magic Angle spinning
Castries, Augustin de. "Synthèse de dérivés du cyclam et applications de leurs complexes métalliques dans des procédés catalytiques de chimie verte." Versailles-St Quentin en Yvelines, 2007. http://www.theses.fr/2007VERS0013.
Full textThis work has been devoted to the synthesis of various macrocycles derived from cyclam bearing sulfinyl and sulfonyl pendant arms and to the study of their potential applications in catalysis. The first part describes the synthesis of perfluorinated macrocycles by Michael addition on various perfluorinated acceptors. The catalytic activity of the corresponding complexes has been studied in autoxidation under fluorous biphasic conditions. The second part describes the synthesis of macrocycles from arylvinylsulfoxides and sulfones. The auxiliary role of the sulfinyl and sulfonyl moieties in the complexation of metallic cations Cu2+ and Eu3+ has been studied. The catalytic activity of the Cu (II) complexes and their ligands has been evaluated in catalytic reactions of Michael additions and ring opening of epoxides in aqueous and organic medium. The third part is devoted to the development of solid phase synthesis for the preparation of trifunctionnalized cyclams
Guyot, Bernard. "Synthèses d'acrylates fluorés alpha-modifiés, polymérisations et applications." Montpellier 2, 1995. http://www.theses.fr/1995MON20091.
Full textBurger, Benjamin Jean-Baptiste François. "Tensio-actifs macrocycliques chiraux dérivés de sucres : synthèse, propriétés de complexation, auto-agrégation et application pour la mise en oeuvre de réactions sélectives en milieu micellaire aqueux." Versailles-St Quentin en Yvelines, 2005. http://www.theses.fr/2005VERS0015.
Full textCe travail est consacré à l'étude de la régio- et stéréosélectivité de réactions en milieu micellaire aqueux. L'étude de l'ouverture de l'époxystyrène en solution micellaire aqueuse d'un tensioactif cationique (bromure de dodécyltriméthyl ammonium) montre que la chimiosélectivité (hydrolyse/bromolyse) et la régio-sélectivité sont contrôlées par la partition et son orientation dans les agrégats. Un tensio-actif chiral (DAC12) constitué de deux blocs amphiphiles dérivés du glucose liés à un macrocycle a été préparé, ses propriétés de complexation et d'agrégation étudiées. Des réactions d'ouverture d'époxyde et d'additions de Michael ont été réalisées en solutions aqueuses micellaires de DAC12. Une légère énantiosélectivité est observée lors de la bromolyse du 2,3-époxypropylbenzène par contre l'addition de -cétoesters sur des cétones conjuguées, bien que favorisée en présence de DAC12, n'est pas stéréosélective. Ces additions-1,4, catalysées par des acides de Lewis Cu(II) ou Eu(III), peuvent être réalisées sans solvant ni tensio-actif avec d'excellents rendements
Ishak, Dridi Islem. "Synthèse stéréosélective et réactivité des 4-hydroxy-1-boryl-1-allénylsilanes. Synthèse et étude théorique de nouveaux dérivés de dimères benzimidazolo-1,3,5,2-triazaphosphorine-2-oxydes." Thesis, Sorbonne université, 2019. https://accesdistant.sorbonne-universite.fr/login?url=http://theses-intra.upmc.fr/modules/resources/download/theses/2019SORUS573.pdf.
Full textThis thesis has focused on two different topics. Firstly, the synthesis of 1-silylalleneborane was studied, for the first time, from acetylenic epoxide and a silylborane. This method allows the stereoselective and stereospecific preparation of allenylboranes through an anti SNi mechanism. Subsequently, propargylation of the aldehydes using allenes afforded stereoselective access to the corresponding 2-alkynyldiols-1,3. A six-member closed transition state has been proposed for this last transformation which proceeds via a SE2' type mechanism. The scope and limitations of these two reactions have been explored.Finally, the electrophilic and nucleophilic reactivity of imidates resulting from the condensation of 2-aminobenzimidazole on a variety of orthoesters was studied as a route for the preparation of N-benzimidazole dimers. We also studied the synthesis of [1,2a] benzimidazolo-1,3,5,2-triazaphosphorin-2-oxide dimers through the action of hexamethylphosphoramide on N-benzimidazole dimers, the evaluation of the antioxidant activity of these new compounds formed (amidic and phospho-nitrogen dimers) is in progress
Leblond, Bertrand. "Préparation de fluorhydrines et d'époxydes fluorés à partir de la 2,2,6,6-tétrachlorocyclohexanone. Accès à des dérivés aromatiques fluorés." Rouen, 1991. http://www.theses.fr/1991ROUES012.
Full textTadj, Fatemeh. "Approche générale pour la synthèse des composés cyclopentaniques chiraux possédant deux groupements hydroxy vicinaux trans. , à partir de l'acide D(-)quinique et L(+)tartrique en vue de l'obtention d'analogues oxa-13 carbacyclines." Paris 11, 1985. http://www.theses.fr/1985PA112208.
Full textIn this work, we describe different approaches to the synthesis of chiral 2,3-dihydroxycyclopentanone starting from D(-)quinic acid or L(+)tartaric acid. Only L(+)tartaric acid led to the targe molecule; this synthesis was optimized. The halogenated and sulphonylated epoxide intermediates were prepare in good yield by a new route. After in situ cyclisation of these intermediates with thiophenylacetonitrile, the cyclopentane obtained was transformed, in several steps, into the desired ketone by two pathways. In particular, the oxidative rupture of an α-hydroxy amide afforded the cyclopentanone in reasonable yield
Nguyen, Thi Bich Viet. "Synthèse et Caractérisation de POSS (Polyhedral Oligomeric SilSesquioxane) greffé POE. Application aux Systèmes Epoxy-Amine à base Aqueuse." Phd thesis, Université du Sud Toulon Var, 2010. http://tel.archives-ouvertes.fr/tel-00617530.
Full textBidois, Séry Laure. "Nouvelle méthode d'accès aux composés aromatiques fluorés. Alkylations et aldolisations d'énolates préparés à partir d'énoxysilanes." Rouen, 1995. http://www.theses.fr/1995ROUES029.
Full textTarsha, Kurdi Kheir Eddine. "Contraintes résiduelles de cuisson dans les stratifiés composites à finalité aéronautique : intégration du procédé de mise en oeuvre et étude de leur influence sur les caractéristiques mécaniques." Toulouse 3, 2003. http://www.theses.fr/2003TOU30061.
Full textChardin, Charline. "Design et synthèse de nouveaux sels organiques pour le développement de polyélectrolytes." Thesis, Normandie, 2018. http://www.theses.fr/2018NORMC278/document.
Full textSince the beginning of the 21th century, Ionic liquids (ILs) have been an important source of innovation in chemical academic and industrial research because they can be synthesized, modulated and used then in many applications. Because of their advantages, ILs are of great interest in the field of polymer materials. Thus, this work describes the synthesis of original organic salts to develop innovative polyelectrolytes. For this, we have developed new routes to access to imidazolium salts functionalized by reactive epoxide functions thanks to the development of an effective and flexible oxidative methodology, feasible on a large scale. The thermal analysis of this salts revealed a very good thermal stability up to 400°C and a low glass transition temperature between -60 °C and -26 °C generally. Following these results, the study was extended to anions to provide epoxides associated with novel sulfonimides. During this second phase, the insertion of epoxide functions on the sulfonimide anion was successfully carried out allowing access to different prepolymers such as a triepoxide cation/anion. In a second part, we carried out a mechanistic study using a monoepoxide salt in the presence of different amines to identify the main active sites during the polymerization. According to this information, we have confirmed the stability of the imidazolium and the very good reactivity of the epoxide with various amines leading to a better understanding of the overall architecture of the network. From this work, a novel epoxy network was prepared in collaboration with the polymer materials engineering laboratory (IMP) of INSA of Lyon. For this, a diepoxide salt was selected and copolymerized in the presence of a diamine hardener (Jeffamine D230) in order to design flexible epoxy/amine networks having very interesting properties in comparison with conventional epoxy networks
Schneider, Raphaël. "Mise au point d'une méthode de synthèse de bêta-nitroénones : étude de leur réactivité." Nancy 1, 1994. http://www.theses.fr/1994NAN10005.
Full textTue, Bi Balo. "Etude de la synthèse électrochimique de chloro-oléfines par réaction de Wittig-Horner in situ." Rouen, 1988. http://www.theses.fr/1988ROUES025.
Full textAmadji, Morad. "Catalyse asymétrique à l'aide d'alcoolates chiraux : synthèse de chirons en série 1,3-dioxanes." Rouen, 1997. http://www.theses.fr/1997ROUES011.
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