Tesis sobre el tema "Furanes – Synthèse (chimie)"
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Soro, Yaya. "Synthèse et applications de furylcarbinols en chimie macro et glycohétérocyclique". Lyon 1, 2001. http://www.theses.fr/2001LYO10082.
Rigal, Luc. "Matière végétale et chimie fine : synthèse de l'hydroxyméthyl-5 furanne carboxaldéhyde-2". Toulouse, INPT, 1987. http://www.theses.fr/1987INPT038G.
Sanda, Komla. "Chimie fine du D-fructose : synthèse du chloromethyl-5 furannecarboxaldéhyde-2". Toulouse, INPT, 1989. http://www.theses.fr/1989INPT034G.
Bouda, Hamilton. "Réactions en milieu hétérogène solide-liquide faiblement hydraté : généralisation de la synthèse d'époxydes : synthèse du furyl-2 thiirane et de ses homologues". Toulouse, INPT, 1987. http://www.theses.fr/1987INPT005G.
Sene, Mame Birame. "Chimie des agroressources : nouveaux procédés de synthèse de l'acide 2,5-furane dicarboxylique à partir de l'acide mucique". Toulouse, INPT, 1994. http://www.theses.fr/1994INPT058G.
Compain, Philippe. "Réarrangement thermique d'α-hydroxyimines scalémiques : approche synthétique du squelette 1-azaspiro[5,5]undécane : synthèse de γ-butyrolactones catalysée par des sels de palladium(II)". Lyon 1, 1997. http://www.theses.fr/1997LYO10120.
Dheur, Julien. "Hydroacylation carbonylante d'alcynes : nouvelle voie d'accès à des cétones alpha, béta-insaturées". Electronic Thesis or Diss., Lille 1, 2008. http://www.theses.fr/2008LIL10113.
By their difonctionnality and, then, by their special reactivity, alpha,beta-unsaturated ketones are involved in numerous synthesis to access complexe molecules. The development of new pathways for their fonnation is a major field of research interest. This work deals with the application of carbonyaltive hydroacylation reaction on terminal akynes for enones synthesis. After an optimisation step and the development of this system, we were able to obtain different enones in good yield and selectivities. ln addition, the use of propargyl alcohols as substrate leads to the fonnation of furane derivatives. A mecanistic investigation upon this reaction has been done with the help of analytical tools, especially NMR under high pressure of carbon monoxide. This study has brought several informations concerning the catalytic cycle of this transformation
Benameur, Leila. "Réactions d'addition-cyclisation de la 2-éthoxybut-2-énal N,N-diméthylhydrazone sur des P-quinones : synthèse de dérivés du naphtofurane et de la furoquinoléine : étude de l'activité cytotoxique in vitro". Lyon 1, 1995. http://www.theses.fr/1995LYO1T182.
Nasr, Kifah. "Enzyme-catalyzed synthesis of polyesters by step-growth polymerization : a promising approach towards a greener synthetic pathway". Electronic Thesis or Diss., Université de Lille (2018-2021), 2021. http://www.theses.fr/2021LILUR030.
Enzyme-catalyzed polymerization have been witnessing a growing attention in recent years as an eco-friendly substitute to metal-based catalysis. The objective of our work is to synthesize a series of polyesters via enzymatic catalysis based on different aliphatic and aromatic diols and diesters, where we focused on the influence of reaction parameters, monomer structures, and depicted the advantages and limitation of enzymatic catalysis in polymer synthesis. The enzyme used throughout our work was Novozym 435, a lipase from Candida antarctica, immobilized on an acrylic resin. In Chapter 1, we reviewed the different methods and approaches used in the literature to synthesize polymers via enzymatic catalysis. In Chapter 2, we performed the reaction between hexane-1,6-diol and diethyl adipate via a two-step polycondensation approach where we monitored the effect of certain parameters on the number average molecular weight (Mn). The influence of temperature, vacuum, and the amount of enzyme loading were determined using a central composite design. Other factors such as the reaction media, oligomerization time, and catalyst recyclability were also assessed. In Chapter 3 furan-based copolyesters were synthesized, where we showed that we can incorporate higher amounts of furan when using aliphatic diols with longer chains such as dodecane-1,12-diol. In Chapter 4, levoglucosan, an anhydrous 6-carbon ring structure and a pyrolysis product of carbohydrates such as starch and cellulose, was reacted against different chain length diesters in the presence of aliphatic diols and Novozym 435 as a catalyst. The polyesters produced were limited in their number average molecular weight (Mn) and the amount of levoglucosan that was successfully incorporated into the polymeric structure. Nevertheless, by increasing the chain length of the diester, we were able to produce a copolymer containing higher amounts of levoglucosan and a higher molecular weight
Borghèse, Sophie. "Toward green processes organic synthesis by catalysis with metal-doped solids". Thesis, Strasbourg, 2013. http://www.theses.fr/2013STRAF008/document.
Nowadays, the modern chemical industry has to deal with increasing environmental concerns, including the disposal of waste and its economic impact, or the diminution of important worldwide resources such as transition metals. In this Ph.D. thesis, we aimed to bring improvement in this area by the development of green processes, based on the use of recyclable heterogeneous catalysts. By combining the catalytic properties of several metal cations with the properties of solid catalysts such as polyoxometalates or zeolites, we were able to set up new tools for organic synthesis. Silver-doped polyoxometalates proved to be very efficient catalysts in the rearrangement of alkynyloxiranes to furans. Acetals and spiroketals were synthetized by dihydroalkoxylation of alkynediols under catalysis with silver-zeolites. As a perspective, we highlighted the potential applications of such green procedures in the total synthesis of more complex molecules. The first results suggested that these environmental friendly processes should gain increasing interest in the future
Fernandez, Anne-Marie. "Préparation de γ-butyrolactones γ-alkylées optiquement pures à partir de l'acide L-tartrique. Application à la synthèse totale de la L-bioptérine". Rouen, 1996. http://www.theses.fr/1996ROUES025.
Marref, Mohamed. "Synthèse et caractérisations de réseaux thermosensibles à base époxy / amine par réactions de Diels-Alder". Phd thesis, Université Jean Monnet - Saint-Etienne, 2013. http://tel.archives-ouvertes.fr/tel-01004162.
Gaudy, Laurent. "Synthèse chimio-, régio- et stéréosélective de molécules de type cinnamylique ou hétérocyclique d'intérêt organoleptique pour les eaux-de-vie". Poitiers, 1999. http://www.theses.fr/1999POIT2356.
Rigal, Luc. "Matière végétale et chimie fine synthèse de l'hydroxyméthyl-5 furanne carboxaldehyde-2 /". Grenoble 2 : ANRT, 1987. http://catalogue.bnf.fr/ark:/12148/cb376093847.
Dartiguelongue, Caroline. "Contribution a la synthese de derives 2-hydroxyethylamine en serie cylopenta(b) cyclohexa(b) furaniques a proprietes antivirales et cytotoxiques potentielles". Angers, 1997. http://www.theses.fr/1997ANGE0502.
Fournier-Nguefack, Christelle. "Synthèses de composés furaniques et pyraniques catalysées par les complexes du palladium(0)". Lyon 1, 1996. http://www.theses.fr/1996LYO10262.
Truel, Isabelle. "Synthèses d'hétérocycles phosphoniques dans les séries de l'indole, du furane, du pyrrole et de la pyridazine". Rouen, 1998. http://www.theses.fr/1998ROUES062.
McCann, Lucas. "Total synthesis of rubrolide L, Yangjinhualine 'A' and the development of chiral modifiers for the Orito reaction". Thesis, Université Laval, 2011. http://www.theses.ulaval.ca/2011/27840/27840.pdf.
In first part of this thesis we describe the total synthesis of the Spanish tunicate constituent rubrolide L (32), a potent inhibitor of human aldose reductase (hARL2).19-24 Blocking this enzyme plays a key role in reducing the quantities of sorbitol found in cells that are insulin independent for glucose diffusion such as nerves, kidneys and the retina.17 Inhibitors of human aldose reductase inhibitors are few and far between with the only example available on the market in Japan. In tests, rubrolide L showed a five-fold increase in inhibitory property compared to Pfizer’s widely studied Sorbinil®. These highly sought biological properties make rubrolide L an eminent target for synthesis. Our previous works based on rubrolide C offered a scaffold upon which our synthesis was designed including a Suzuki coupling reaction, followed by utilization of our newly developed method for regio-controlled aldol condensation. Next, the alkylidene was selectively brominated leaving the methoxyphenyl ring untouched (as confirmed by the Nuclear Overhauser Effect Spectroscopy).* Leaving a final deprotection step before the final product was obtained. Recently, a method was observed by our group in which the regio-controlled aldol condensation was made effective by using a brominated substrate with an unprotected phenol, eliminating one step and opening the door to a potential three-step synthesis. The overall yield for our new synthesis of rubrolide L is 42% over 5 steps or 37% over 4 steps. In the second part of the synthesis, we further build upon our scaffolding from Rubrolide L to examine the synthesis of yangjinhualine A (70), a potential anti-inflammatory agent. The optimized conditions for the Suzuki coupling from rubrolide L served as a sturdy starting point of synthesis from the structurally similar triflate. Yangjinhualine A was synthesized in 6 steps with 33% yield. In the third part we discuss the synthetic route towards (-)-hygrine (91), (-)-norhygrine (92). Although unsuccessful in this endeavour, we have further understood the *See ‘Annexe’ reactions of alkylhalides on a nitrile moiety adjacent to a pyrrolidine center. In doing so, we have developped a synthesis towards (-)-pyrrolsedamine (93). And finally, the fourth part describes the development of chiral modifiers for the Orito reaction on a Pt(111) surface; the goal of which was to improve upon the widely used cinchonidine (CD). Reported within are the synthesis of 3-benzyl-1,7,7-trimethylbicyclo[2.2.1]heptan-2-ol (117).
Pourashraf, Mehrnaz. "Synthèse asymétrique de cyclopentanones et de lactanes : application à la synthèse de la (+)-taonianone et de la (-)-slaframine". Université Joseph Fourier (Grenoble), 1999. http://www.theses.fr/1999GRE10267.
Peltier, Pauline. "Nucléotides-sucrés furaniques : synthèses et activités anti-mycobactériennes". Rennes 1, 2008. http://www.theses.fr/2008REN1S098.
Furanosides are original glycosides which are presents in several micro-organisms, particulary in pathogenic species, such as those responsible for tuberculosis, leprae, Chagas diseases. . . The fact that those glycoconjugates are absent in mammal makes those five-membered ring sugars, valuable targets to design new pharmacophores and/or treatments. Therefore, a better understanding of furanoconjugates 's biosynthetic pathways is a crucial step of this new therapeutic strategy. This report presents a straightforward chemical synthesis of nucleotides-sugars from thioimidoyl furanosides. Then, this work underlines also the biocatalytic behavior of nucleotidylyltransferases in order to synthesize non-natural furanosyl nucleotides. At last, activities of those new compounds were evaluated on the enzymes involved in the biosynthesis of the arabinogalactan of Mycobacterium tuberculosis
Coutrot, Frédéric. "Préparation de nouveaux synthons [alpha]-aminoacides C-glycosylés en position 5 d'un furanose ou en position 6 d'un pyranose et application à la synthèse de nouveaux glycopeptides". Nancy 1, 1999. http://www.theses.fr/1999NAN10243.
Goussé, Cécile. "Applications de la réaction de Diels-Alder aux polymères furaniques". Grenoble INPG, 1997. http://www.theses.fr/1997INPG0007.
Pouliot, Martin. "Synthèse totale du (-)-panacène et correction de sa configuration relative & synthèse totale de la cadiolide B et du Vioxx(R) par la fonctionnalisation séquentielle et régiosélective de furanones". Thesis, Université Laval, 2006. http://www.theses.ulaval.ca/2006/24125/24125.pdf.
Foucher, Elsa. "Métallation de positions allyliques en série terpénique par des systèmes superbasiques". Rouen, 1998. http://www.theses.fr/1998ROUES052.
Renault, Louise. "Nouvelles molécules à motif furane ou sucre pour la synthèse et l’évaluation de tensioactifs et d’intermédiaires chimiques biosourcés à partir de polysaccharides d’algues". Thesis, Rennes, Ecole nationale supérieure de chimie, 2019. http://www.theses.fr/2019ENCR0060.
Azevedo, Mariangela Burgos Martins de. "Synthèse énantiosélective de (gamma)-butyrolactones : ()-méthylénolactocine, (-)-acide protolichestérinique, (-)-blastmycinolactol, (+)-blastmycinone, (-)-NFX-2 et (+)-antimycinone". Université Joseph Fourier (Grenoble ; 1971-2015), 1995. http://www.theses.fr/1995GRE10116.
Jacoby, Denis. "Synthese et reactivite des cyclopropanes actives". Paris 6, 1987. http://www.theses.fr/1987PA066439.
Gilbert, Laurent. "Réactions stéréosélectives contrôlées par un groupe thermolabile : applications en synthèse". Paris 11, 1987. http://www.theses.fr/1987PA112318.
This work deals with the use of steric and electronic properties of thermolabile protective group of olefins in order to induce stereoselective reactions. The chelating properties of the bridge oxygen of the furan adduct of a conjugated aldehyde allow to achieve stereoselective addition reactions on the carbonyl group. These reactions have been used for the synthesis of optically active adduct. Application to the synthesis of γ-dodecanolactone and quercus lactone a, two naturally occurring γ-lactones are described. The steric bulk of the double bond protective group of vinyl and isopropenyl ethyl ketones induce highly syn stereoselective aldol condensations between these protected conjugated ketones and various aldehydes. A selective reduction of the aldols followed by a thermal double bond regeneration lead to allylic 1,3-diols where the relative configuration of three consecutive asymetric carbons is well defined
Colin, Sylvie. "Nouveaux accès aux esters α-aminoboroniques". Rouen, 1999. http://www.theses.fr/1999ROUES026.
PETIT, YVES. "Synthese d'hydroxy-2 esters enantiomeriquement purs a partir d'amino-2 acide : etude stereochimique de l'addition 1,4 d'organometalliques sur des systemes insatures-2,3 hydroxy-4". Paris 6, 1987. http://www.theses.fr/1987PA066578.
Masse, François. "Une nouvelle approche vers la synthèse de 1'-homonucléosides via une cycloaddition de Diels-Alder à partir du furane comme diène". Mémoire, 2010. http://www.archipel.uqam.ca/3432/1/M11527.pdf.