Dissertations / Theses on the topic 'Réaction de Friedel-Crafts'
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Elmamouni, Elhachemia. "Nouvelles applications de la réaction de Passerini dans des réactions de type Friedel-Crafts et Tsuji-Trost." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLX011/document.
Full textThe development of rapid and efficient syntheses of complex molecules from simple starting substrates using a minimum of steps is a real challenge of contemporary organic chemistry. In this context, multicomponent reactions, thanks to their ability to create several one-step bonds, offer a high efficiency in synthesizing structures of great molecular complexity. Moreover, organometallic catalysis has developed considerably in recent years, becoming a tool of choice for the formation of carbon-carbon bonds. The Tsuji-Trost reaction is specially well known in this field.In this thesis, the discovery of the original post-condensations from the adducts obtained by multicomponent reactions involving isonitrile is the major axis of our research. These reactions allow efficient access to a wide range of heterocyclic compounds.First, we have developed a new efficient pathway for the synthesis of indolylacetamides via the Passerini/Friedel-Crafts cascade from the Passerini adducts and indole in the presence of a Lewis acid. A one-pot version of this cascade has been also developed.Furthermore, we have exploited the reactivity of N-monosubstituted hydrazones as 1,3-bis-nucleophile in order to prepare various 2-pyrazoline derivatives via a pallado-catalyzed Tsuji-Trost/Cyclisation cascade from the Passerini adducts or Phosphonates. In order to prepare enantioselectively enriched 2-pyrazolines, the enantioselective version of this cascade was also realized from the Passerini adduct.Finally, the development of a new Tsuji-Trost/Cyclization cascade from the Passerini adducts and the allyl methyl carbonate provide straight fast and efficient access to oxazolidine-2,4-diones heterocyclic units by exploiting the carbon dioxide generated in situ
Gonçalves, de Almeida José Luis. "Alkylation du benzène par le 1-dodécène sur catalyseurs zéolithiques." Lyon 1, 1994. http://www.theses.fr/1994LYO10292.
Full textVece, Vito. "Formation de liaisons C-C et C-O par activation électrophile de doubles liaisons catalysée par des superacides de Brönsted et de Lewis." Nice, 2011. http://www.theses.fr/2011NICE4028.
Full textThe use of Brönsted superacids (TfOH and Tf2NH) or Lewis superacids (M(n)(OTf)n and M(n)(NTf2)n) in organic synthesis presents a high interest in a wide number of reactions, particularly for the C-O, C-N and C-C bond formation involving the electrophilic activation of a double bond. These superacids could be used in sub-stoichiometric amounts whiole remaining more active and selective than more conventional Lewis acids, therefore improving the Green Chemistry aspects of our studies. We have used these catalysts to carry out Friedel-Crafts type reactions, tandem Friedel-Crafts-hydroalkoxylation processes and cycloisomerisations. The polyfunctionalised compounds for which a novel and efficient access is proposed present potential applications in medicinal, agricultural and perfume chemistry. A first chapter is devoted to the bibliographical studies of the various topics presented in this manuscript. In a second chapter, the Friedel-Crafts type allylation reaction from aromatic cycles, phenolic or not, have been studied and oriented towards the synthesis of valuable chemicals of industrial relevance. In a third chapter, mechanistic studies based on kinetic measurements and theoretical calculations on this reaction are presented. In a fourth chapter, cyclisation reactions of polyinsaturated compounds such as 1,6-dienes and aza-dines are presented. The cycloisomerisation of substituted 1,6-dienes allowed the access to several new compounds of interest in fragrance chemistry, a central interest of our laboratory. The application of the catalytic systems studied in the synthesis of compounds with odorant properties has
Ricci, Jérémy. "La catalyse par les triflates et triflimidures métalliques : réaction d'allylation de Friedel-Crafts et alkenylation intramoléculaire." Nice, 2009. http://www.theses.fr/2009NICE4038.
Full textAromatic polyfunctionalised compounds constitute an important class of intermediates and may present a wide scope of applications not only in the pharmaceutical field, but also in flavour and fragrance chemistry. The scope of this work was focused on the elaboration of a catalytic system promoting allylation of aromatics compounds by Friedel-Crafts method and intramolecular cyclisation reaction. Trifluoromethanesulfonate catalysts [M+n(OSO2CF3)n] are strong Lewis acids, considered as Lewis « superacids ». The allylation of various aromatic compounds, using acetates as the allylating agents has been developed. The method requires only a low amount of In(OTf)3 (1 mol%), operate at room temperature and the target molecules are obtained in yields of 50-90%. Allylation reactions with phenol derivatives have also been examined in catalytic reactions. Products involving intramolecular cyclisation are obtained with good yields. The same method is also extended for intramolecular Friedel-Crafts alkenylation reactions. Products are obtained quantitatively. A complementary study with chiral allylic acetate and other experiences led to a proposed reaction mechanism
Dinut, Aurélia Viorica. "Etude des sélectivités de la réaction d'alkylation de friedel-crafts catalysée par des complexes de lanthanides." Paris 11, 2010. http://www.theses.fr/2010PA112166.
Full textFriedel-Crafts alkylation reaction is one of the most fundamental C-C bond forming reactions in organic synthesis. This work concerns the study of Friedel-Crafts alkylation reaction involving various arenes and electrophiles such as imines and trifluoropyruvates. The addition of electron-rich aromatic compounds to imines, known as the aza-Friedel-Crafts reaction has been realized in the presence of a catalytic amount of samarium diiodide. This one showed good activity and provided access to new products such as triarylmethanes, a-amino esters and diarylamines. For the latter two compounds, a second Friedel-Crafts reaction, catalyzed by samarium diiodide, was performed using an aromatic compound different from the first step. This methodology has provided new unsymmetrical diarylesters and triarylmethanes. The study of the asymmetric aza-Friedel-Crafts reaction was also undertaken using samarium iodobinaphtholate as a chiral catalyst; maximum selectivity of 78% is then obtained. The enantioselective addition of various indole derivatives to alkyl trifluopyruvates is described in the presence of a new catalytic system based on ytterbium triflate and chiral pyridylalkylamines. Good yields and high enantioselectivities (up to 83% ee) in the Friedel-Crafts alkylation were obtained. This is the first report concerning the use of a chiral ytterbium complex in asymmetric Friedel-Crafts alkylation reactions. Moreover, the alkylation of anisole, phenol and naphthols by methyl trifluopyruvate was affectively performed in the presence of iron chloride (II) and indium chloride (III)
Cseri, Tivadar. "Utilisation de montmorillonites comme catalyseurs ou supports dans des réactions organiques." Lyon 1, 1995. http://www.theses.fr/1995LYO10137.
Full textWiné, Gauthier. "Synthèse de zéolithe BETA sur du β-SiC et dans des nanotubes de carbone : Application à la réaction d'acylation de Friedel-Crafts." Université Louis Pasteur (Strasbourg) (1971-2008), 2004. https://publication-theses.unistra.fr/public/theses_doctorat/2004/WINE_Gauthier_2004.pdf.
Full textThe work which was carried out for this PhD Thesis was based on the synthesis of BETA zeolite, supported on preshaped silicon carbide (SiC) or as nanowire form, and their uses as catalyst in liquid phase Friedel-Crafts acylation : first, the benzoylation of anisole by benzoyl chloride and second, the acylation of anisole by acetic anhydride. The first part of the PhD Thesis presents the synthesis of BETA and ZSM-5 zeolites, coated on silicon carbide (SiC) in different forms : grains, extrudates and foam. Silicon carbide exhibits high thermal conductivity, high resistance towards oxidation, high mechanical strength and chemical inertness, properties required for heterogeneous catalyst supports. It was efficiently used as support for dispersing BETA zeolite. The possibility of preparing BETA coated on SiC with a more open shape, i. E. Monolith, allows the use of these supported catalysts for a high rate reaction, with a minimum diffusion limitation. In a second part, we synthesized BETA zeolite in a non aqueous synthesis middle, with carbon multiwalled nanotubes as a shape matrix. We carried out these synthesis under hydrothermal and non-hydrothermal conditions. Finally, all the synthesized composites were used as catalysts for Friedel – Craft benzoylation and acetylation in both reaction modes : slurry and fixed-bed. Comparisons between our catalysts and a commercial bulk BETA are also reported, and show that catalytic activity and stability can be improved by supporting the zeolite
Montagne, Fabienne. "Les sels de terres rares en catalyse hétérogène des réactions de Friedel-Crafts : applications en polycondensation." Dijon, 1997. http://www.theses.fr/1997DIJOS033.
Full textAribert, Nicolas. "Acylation hétérogène de Friedel-Crafts en milieu CO2 supercritique." Phd thesis, Toulouse, INPT, 2009. http://oatao.univ-toulouse.fr/16222/1/aribert.pdf.
Full textOlivon, Kevin. "Procédés catalytiques et outils millifluidiques : applications aux réactions de Friedel-Crafts et d'oxydation." Thesis, Bordeaux, 2014. http://www.theses.fr/2014BORD0143.
Full textThe search for new methods for the acquisition of physical and chemical reactions by limiting the effect on humans is of great importance for modern chemistry. The use of new miniaturized tools can limit the quantities of chemicals used while increasing research productivity. Indeed, the study of the various parameters monitored simultaneously increases the number of experimentsfor a given time. Nevertheless, this step must be performed after prior determination ofthe key parameters of the reaction by the use of high flow tools such as robotics. These tools are used for optimization and the search for new synthetic pathway of a reaction of industrial interest. In addition, to meet the interests of heterogeneous catalysis in industry for easier separation and recycling of these catalysts, we have developed two miniaturized tools. These allow the study and data acquisition of chemical reactions catalyzed by solid. Development was registeredin two stages : a physical characterization tools and the study of an industrial model reaction, the acylation of anisole with zeolite catalysts
Vincent-Guignard, Cécile. "Synthèse et réactivité d'acétophénones : étude du processus de désactivation de catalyseurs zéolithiques au cours de l'acylation du vératrole." Poitiers, 2002. http://www.theses.fr/2002POIT2272.
Full textPeyronneau, Magali. "Nouveaux catalyseurs pour les réactions d'alkylsulfonylation et de chlorosulfinylation : nouveau procédé de synthèse des triflates métalliques." Toulouse 3, 2003. http://www.theses.fr/2003TOU30076.
Full textAcylation and sulfonylation Friedel-Crafts reactions needs the use of a stœchiometric amount of catalyst (in particular AlCl3) because of the complexation of this latter with ketones and sulfones formed. So, this process generates significant amounts of wastes due to the required hydrolytic step to isolate the product. This work concerns the discovery and the study of new Friedel-Crafts reaction catalysts, and particularly for alkylsulfonylation reaction that be used in truly catalytic amount. These catalytic systems based on a synergy between metallic chlorides (BiCl3 and SbCl3) and triflic acid (TfOH, Tf = SO2CF3) have been studied and they allowed to synthesize some aromatics methylsulfones by reaction between methanesulfonyl chloride (MeSO2Cl) and aromatics. .
Legrand, Anne. "Conception et synthèse d'inhibiteurs potentiels de la topoisomérase II." Lille 1, 1996. http://www.theses.fr/1996LIL10176.
Full textMeric, Pascal. "Acétylation du 2-méthoxynaphtalène en présence de zéolithes acides." Montpellier 2, 2001. http://www.theses.fr/2001MON20174.
Full textKadleciková, Katarina. "Synthèse des nouveaux benzo et hétéroanalogues d'alcaloi͏̈des indolozidiniques hydroxylés." Le Havre, 2003. http://www.theses.fr/2003LEHA0002.
Full textIn this thesis, we synthesised new aromatic analogs of indolizidine alkaloids. We used the (S)-N-(phénylméthyl)-5-oxopyrrolidine-2-carboxylic acid as a chiral starting material in the synthesis of benzoanalogs of the tylophorine, the swainsonine and the lentiginosine alkaloids. The synthesis of benzoanalogs of the tylophorine was achieved in 4 steps and good overall yields (30. 9% and 27%). The synthesis of benzoanalogs of the swainsonine and the lentiginosine was accomplished in 9 steps in overall yields 6. 4% and 1. 3% (swainsonine) and de 10. 7% and 3. 4% (lentiginosine). We also developed a new simple methodologie for the preparation of 7-ethyl-substitued octahydroindolizines based on the desulfuration of the hexahydrothieno[2,3-f]indolizinones through hydrogenation on Raney nickel
Jebali, Khaoula. "Cétones α,β-insaturées α-bromométhylées β-fonctionnalisées : Synthèse et étude de la réactivité électrophile." Nantes, 2016. https://archive.bu.univ-nantes.fr/pollux/show/show?id=20a7413c-ace3-46a7-ba0d-f9018089434e.
Full textDue to their multifunctionnality and their special reactivity the α,β-unsaturated α-bromomethylated β-functionnalized esters particularly occupy a prominent place in organic chemistry. They have been used as building blocks in the preparation of some natural products and their biologically active derivatives. Surprisingly, ketone analogs of these Michael acceptors have not been the subject of many studies. We propose in this work, the synthesis of new α,β-unsaturated α- bromomethylated β-functionnalized ketones and an innovative study of their electrophilic reactivity toward various nucleophiles, the results indicate that these compounds are the target of particularly nucleophilic SN2 and SN2’ substitutions or 1,2- addition. The reaction of synthesized ketones with suitably chosen amines provides a new family of 4-acylpyrrol-2(5H)-ones whose cyclization under Friedel-Crafts conditions gives access to tricyclic systems like pyrroloisoquinolines, considered as precursors of (±)-Crispine A analogs
Richard, Stéphanie. "Chimie propre : activité catalytique de sels de métaux f dans les réactions de Friedel-Crafts et de Diels-Alder." Dijon, 1999. http://www.theses.fr/1999DIJOS072.
Full textMondière, Aurélie. "Réactions multicomposants et applications : synthèse de cyclopent[b]indoles et pyrrolo[1,2-a]indoles : synthèse diastéréosélective de lignanes tétrahydrofuraniques trisubstitués." Phd thesis, Université Claude Bernard - Lyon I, 2010. http://tel.archives-ouvertes.fr/tel-00837814.
Full textCourant, Thibaut. "Multi-fonctionnalisation d’imines : synthèse de composés aminés α-β-fonctionnalisés par procédé photocatalysé et réactions asymétriques organocatalysées." Thesis, Paris 11, 2013. http://www.theses.fr/2013PA112308.
Full textThe aim of this study is the development of new methodologies for imines functionalization by organocatalysed and photocatalysed processes.First, a photocatalysed alkylation reaction of enecarbamates have been described. The use of organometallic Iridium complexes allowed the double functionalization of enecarbamates leading to highly substituted imines surrogates. This process is a green alternative to the use of heavy metals and only needs visible light as an renewable energy source to proceed. This environment-friendly radical transformation has been submitted to mechanistic study.In a second part, an aza-Friedel-Crafts reaction organocatalysed by chiral Brønsted acid has been studied. The bi-fonctionnality of chiral phosphoric acids has been advantageously used to perform the Friedel-Crafts addition of various substituted indole to in situ generated acyl-iminium ions. The compounds obtained by this methodology are showing interesting biological activities on central nervous system. Finally, the first enantioselective Povarov reaction involving amino-heterocycles as 2-azadienes precursors has been reported. This reaction is based on previous lab reports and the synthesis of tetrahydroquinoline analogues has been described. The multicomponent reduction/Povarov reaction sequence catalyzed by chiral phosphoric acids derived gives a rapid access to a wide library of bioactives analogues
Ratinaud, Céline. "Pyrroloazépinediones, pyrrolopyridinediones, pyrrolopyrrolones : synthèse et recherche d'inhibiteurs de topoisomérases et de kinases." Paris 11, 2006. http://www.theses.fr/2006PA112362.
Full textThe work described in this manuscript deals with the synthesis of analogues of marine metabolites isolated from sponges. Our objective was directed to a research of a new scaffold inspired from nature and from previously known biological results on kinases ans topoisomerases inhibitors. The first aim of this work was to develop new syntheses of pyrroloazepinediones and pyrrolopyridinediones derivatives. The key steps of our synthesis are a regioselective Friedel-Crafts acylation of pyrrolic derivatives with N-protected α or β-aminoacids, followed by a cylization-lactamisation. The synthesis of pyrrolopyridinediones systems was quite difficult. Lt's nevertheless the first lime that a Friedel-Crafts acylation of pyrrolic derivatives desactivated by an ester function with glycine is described. The particular reactivity with regard to α-aminoacids, besides glycine, was the origin of three pyrrolopyrrolone type original molecules. The acylation study with β-alanine and the further cylization attempts permitted to synthesize the desired azepinediones derivatives. These reactions are realized on multigrams of material. The second aim of this work was to use the carbonyl function reactivity of the prepared pyrroloazepinediones derivatives to introduce pharmocophores for pharmacological activity discovery and modulation. The developed chemistry allowed us the synthesis of marin hymenialdisin analogues. Several oximes have also been prepared with good yields. The pharmacological results in cell proliferation as well as in kinases inhibitions are as yet modest
Vukovic, Vuk. "Synergistic effect of acids and HFIP on Friedel-Crafts reactions of alcohols and cyclopropanes." Thesis, Strasbourg, 2018. http://www.theses.fr/2018STRAF068.
Full textThe catalytic activation of alcohols towards dehydrative bond formation in the absence of pre-activation has become a major research interest over the past two decades. In this thesis, the peculiar synergistic effect of strong acids as catalysts in hexafluoroisopropanol (HFIP) as solvent on various classes of unstable carbocations in Friedel-Crafts chemistry was investigated. It was found that for the first time, Brønsted acid catalyzed Friedel-Crafts reactions of highly electronically deactivated primary benzylic alcohols proceeded smoothly due to the acid-induced aggregation phenomena in HFIP. A similar strategy was used for the activation of propargylic alcohols as a new route to selectively access CF3-substituted allenes and indenes from the same starting compounds. Furthermore, this catalytic system was succesfully applied for Friedel-Crafts reactions of unactivated and donor-acceptor cyclopropanes. Finally, it was discovered that HFIP can mitigate against classical carbocation rearrangement in Friedel-Crafts alkylations, allowing access to linear alkyl chain products in a single step from linear alkyl alcohols
Joerger, Jean-Michel. "1. Catalyse asymétrique dans les liquides ioniques : applications à la réduction par transfert d'hydrogène et à l'époxydation ; 2. Réactions de substitutions électrophyles aromatiques avec des chloroformiates." Rennes 1, 2005. http://www.theses.fr/2005REN1S008.
Full textDuquenne, Christophe. "Vers une réaction de Friedel-Crafts "verte". Mise en évidence de nouveaux catalyseurs recyclables dérivés de l'indium (III) : application à l'acylation des composés aromatiques." Rennes 1, 2003. http://www.theses.fr/2003REN10012.
Full textHerblot, Martin. "Synthèse et caractérisation de monomères téléchéliques précurseurs de polymères thermostables de type PEKK." Thesis, Rouen, INSA, 2014. http://www.theses.fr/2014ISAM0009.
Full textA new synthetic route to poly(ether ketone ketone), thermostable and semi-crystalline polymers, has been studied towards composite materials with a thermoplastic matrix obtained by a resin transfer molding process (RTM). This original synthesis was conducted by coupling reactions between difunctionals monomers and coupling agents. Nine X-EKKE-X monomers with different reactive extremities have been synthesized by Friedel-Crafts acylation or nucleophilic aromatic substitution. Thermal and structural properties were thoroughly investigated. Four polymers with semi-crystalline or amorphous morphologies and low molecular weights were obtained by coupling reactions between monomers with COOH functional extremities and bisoxazolines. Through the study of the thermal behavior of models molecules, a thermal fragility was highlighted for these polymers from 250°C and assigned to the amide-ester bridge between two EKKE units
Salmoria, Gean Vitor. "Application des micro-ondes à la chimie fine et aux transformations des matériaux céramiques, polymères et bois : mesure des propriétés électromagnétiques pour l'optimisation et le contrôle des procédés." Toulouse, INPT, 2000. http://www.theses.fr/2000INPT022H.
Full textGratais, Alexandre. "Chimie des acrylamides chiraux : nouvelles méthodologies et application à la synthèse de nouvelles architectures moléculaires." Thesis, Rouen, INSA, 2014. http://www.theses.fr/2014ISAM0013/document.
Full textReactions allowing carbon-carbon bond creation are essential tools in the field of organic synthesis. These reactions are used to access to more and more complex structures. However their control in the case of highly functionnalized partners is still a serious concern.Development of new methodologies based on the reactivity of aminoacid derivating chiral acrylamides is reported. A new version of pyrrole alkylation reaction was developed using the electrophilic behaviour of highly functionnalized chiral acrylamides. Pyrrole can be selectivly monoalkylated or dialkylated leading to new heterocyclic structures bearing peptidic sequences containing up to four aminoacids residues. Chiral acrylamides bearing a conjuguated allyltrimethylsilane moiety have been used as new reagent in highly diastereoselective and chemospecific towards aldehydes allylation reactions. This methodology was extended to α-aminoaldehydes allowing easy access to γ-aminoacidsanalogues
Moussa, Saber. "Réactions tandem de type aza-MIRC et ions N-acyliminiums : accès rapide et stéréocontrôlé à des nouvelles structures aza-cycliques." Le Havre, 2010. http://www.theses.fr/2010LEHA0009.
Full textThis report presents a new method of the preparation of a new class of highly functionalized N, O – acétals and the study of their ability to react towards catalytic intra – and intermolecular α-amidoalkylation reactions. In a first chapter, we described some methods of synthesis of the precursors of N–acyliminiums ions and their various activation pathways. In the second chapter we elaborated the synthesis of functionalized 5-alkoxypyrrolidinones as precursors of N–acyliminiums species according to a new aza-MIRC tandem process with involves commercial diester-, cyanoester-, and dicyano alkoxymethylenes and various N-substitued α-bromoacetamides as dipole-[1,3]. A first application of the N,O-acetalic moiety in previously synhesized lactams is described in the third chapter involving intramolecular Friedel-Crafts reactions. This study, conducted from N-arylethyl substituted γ-lactams, and leading and a simple and fast way to tricyclic compounds of biological interest. These results allowed us to point out the positive effects of both arms ester in α-position of the reaction site. Explained essentially by an assistance to the generation of the N-acyliminium ion and also by an increase of its reactivity potential by the formation of a pseudocyclic intermediate resulting from an anchimeric assistance. The fourth chapter was the object of a complementary study that led previously by the investigation of the intermolecular approach of the α-amidoalkylation reaction. The reactivity results showed a perfect analogy with those of the intramolecular study. The synthetic application of thes adducts was demonstrated by some examples of synthesis of bicycles compouds by metathesis
Goma, Jean Richard. "Applications de l'alkylation catalysée par transfert de phase dans la synthèse de coumarines, de chromones, d'amides et de photoxyéthers d'intérêt thérapeutique." Paris 11, 1989. http://www.theses.fr/1989PA114820.
Full textCacciuttolo, Bastien. "Formation de composés polycycliques par activation de doubles liaisons : approche catalytique intra et intermoléculaire de réactions de type Friedel-Crafts : applications au domaine des arômes et parfums." Phd thesis, Université Nice Sophia Antipolis, 2013. http://tel.archives-ouvertes.fr/tel-00833191.
Full textAllous, Iyad. "Synthèse de composés diaza-spiraniques analogues d'alcaloïdes cytotoxiques et anticancéreux." Le Havre, 2010. http://www.theses.fr/2010LEHA0004.
Full textOur contribution for the synthesis of spiro-oxindole templates is presented in this memory. For that purpose we have investigated two different approaches employing N-substituted α-bromoacetamides in tandem processes. In the first chapter we have highlighted the importance of chemotherapy in the treatment of disease such as cancer. Among the efficient molecules discovered, the unique structure of the spiro oxindole framework has encouraged the creativity of many researchers. In the second chapter our work was focused on the development of a tandem process to allow the access to oxindoles spiro-fused with succinimide ring. α-Hydroxy-γ-lactams were obtained by regio- and stereoselective reduction of one of both carbonyls of the succinimide moiety and were then engaged in π-cationic cyclization reactions via N-acyliminium species generated by Lewis or Bronsted acids. Thus, complex pentacyclic spiro oxindoles molecules were isolated in good yields and high diastereoselectivities. The third chapter was centered on the application of a new tandem reaction developed in our Laboratory for the synthesis of oxindoles spiro-fused with γ-lactams. The wide variety of reachable structures employing this strategy should allow us to obtain in the near future numerous spiro oxindole frameworks depending on the chemistry involved. Already, Friedel-Crafts and Dieckmann cyclizations were shown to be efficient for the synthesis of elaborated tetra- and pentacyclics spiro oxindole systems, which could be considered as analogous to numerous spiro alkaloids models
Fogain-Ninkam, Alain. "Synthèse de structures hétérocycliques incluant un motif isoindole par cyclisation intramoléculaire." Le Havre, 2000. http://www.theses.fr/2000LEHA0007.
Full textGonnot, Vanessa. "Synthèse de molécules d'intérêts thérapeutique: Rhéine et Méquitazine : Mise au point de procédés de synthèse." Strasbourg 1, 2007. http://www.theses.fr/2007STR13241.
Full textThis Ph-D work in collaboration with Laboratoires Pierre Fabre has lead to the developpment of new synthetic routes to biologically active coumpounds. In chapter 1, we have synthetised Mequitazine by a new route. Key step is a palladium-catalysed allylic substitution on a new allylic substrate. Racemic Mequitazine is obtained by hydrogenation in the last step, but this route could lead to biologically active Mequitazine enantiomer by the mean of an asymmetric hydrogenation catalyst. Two new ways for the synthesis of Rhein has been developped in chapter 2. They are both based on ortho-metallation reaction. The first route has been optimised so that it can be used industrially, while the second one, by changing the electrophile, leads to Rhein in only three steps. Last step’s Friedel Crafts’acylation selectivity has been improved by detailed study of Hayashi rearrangement in molten salt. In a third chapter, a new method for converting -fluorocyanhydrines into aldehydes has been studied
George, Nicolas. "Étude de la synthèse totale de tétrahydroisoquinoléines naturelles : quinocarcine, Tétrazomine et Lémonomycine. : rapide accés aux α-amidosulfures et leur utilisation en tant que précurseurs de N-acylimines dans la réaction de Friedel-Crafts." Phd thesis, Université Paris Sud - Paris XI, 2011. http://tel.archives-ouvertes.fr/tel-00980348.
Full textMorizur, Vincent. "Fonctionnalisation de polymères et applications dans les domaines de l’énergie, de la catalyse, de la cosmétique et de la santé." Thesis, Nice, 2014. http://www.theses.fr/2014NICE4102.
Full textPolymers are now being studied in many fields such as chemistry, biochemistry, nanotechnology, electronics, medicine or material science and have applications in areas such as automotive industry, food industry, fine chemistry. The objective of this thesis is to achieve the functionalization of polymers and modify the properties of these materials in order to consider new applications. We were interested in polymers with the poly(aryl ether) motif, more particularly poly(ether ether ketone) (PEEK). This polymer is known for its mechanical, thermal, electrical properties and for its resistance to chemicals. In the first chapter, we present the functionalization of different polymers by sulfonyl chloride, sulfonic acid and sulfonamide functions. The second chapter is devoted to the synthesis and electrochemical study of novel polymeric electrolytes and new membranes for potential applications in the field of lithium and sodium batteries, as well as in the field of fuel cells. In the third chapter, the preparation of new metal catalysts derived from polymeric sulfonic acids is discussed. A study of the catalytic activity of these different polymeric catalysts was carried out on the Friedel-Crafts acylation reaction. The fourth chapter is devoted to the preparation of new materials with interesting optical properties. Finally, in the fifth chapter, the preparation and the study of new materials with antibacterial properties are reported
Ibrahim, Houssein. "Synthèse de nouveaux composés chiraux à partir d'isosorbide et d'isomannide : applications en catalyse asymétrique." Thesis, Paris 11, 2011. http://www.theses.fr/2011PA112159.
Full textThe Thesis deals with the synthesis of new chiral compounds derived from isosorbide and isomannide and their applications to asymmetric catalysis. The first part of this work consisted in perfecting the chemical and enantioselective hydrogenation conditions of olefins using chiral monophosphines as ligands (up to 96% ee). These phosphines were also used as organocatalysts for [3+2] cyclisation reactions showing good catalytic activity and moderate enantioselectivity. The second part turned to the synthesis of a series of chiral nitrogen compounds which were evaluated in the asymmetric transfer hydrogenation of aromatic ketones giving good enantioselectivity (up to 73% ee). The complexes formed with amine ligands were also applied to the addition reaction of phenylacetylene to imines. Good catalytic activity but low enantioselectivity were observed. These nitrogen compounds were also used as organocatalysts in the Michael addition reaction of aromatic ketones to the nitrostyrene. Again, low enantiomeric excess was obtained. The last part of this work consisted in preparing new chiral thiourea compounds which were applied as organocatalysts to the Friedel-Crafts alkylation reaction of different indoles with nitroolefines, and to the conjugate addition reaction of hydroxylamines to pyrazoles derivatives for the synthesis of β-amino acids. In two cases, these catalysts have proved active but not enantioselective
Eck, Geneviève. "Synthèse partielle de la frédéricamycine A." Paris 6, 1986. http://www.theses.fr/1986PA066466.
Full textSmutek, Bernhard. "Réactions Organiques des Alcools en Conditions Hydrothermales." Thesis, Montpellier 2, 2011. http://www.theses.fr/2011MON20180.
Full textThis thesis aims to study and to apply reactions of alcohols under hydrothermal conditions.Studies on 1-phenyl-ethanediol show an aldolisation, followed by an intramolecular Friedel-Crafts type reaction and an aromatisation. Finally, it ends up by as 1-phenyl-naphthalene.Ethylene glycol reacts on itself with a strong dependence on the temperature and the solvent. The conversion of 1,2-propanediol showed similar dependences and obtained even the aromatic compound mesitylene and especially the amount of products proves dependence on the temperature and the duration of the reaction. The main compounds can be used as solvents, as biofuel and for syntheses, whereas the byproducts might be biocarburants after hydrogenation.The Friedel-Crafts type reaction is transferred to an intermolecular one. Naphthalene and phenol are studied in more detail. 0.05mol/L HCl are enough in order to benzylate an aromatic compound at 180°C. HCl can be replaced by acetic acid or formic acid, but even concentrations of 1.0mol/L do not achieve results as good as 0.05mol/L HCl. The recycling of the aqueous phase of these reactions is advantageous. Additionally, benzyl alcohol alkylates benzyl alcohol and thus it can polymerize. Higher temperatures lead to longer polymers. This polymerization can be used in the domain of nuclear fuel recycling in order to separate platinum group metals out of a model solution
Boiaryna, Liliana. "Evaluation de la catalyse à l’or dans la chimie des ions N-acyliminiums : application à la synthèse one-pot de composés polycycliques azotés." Thesis, Le Havre, 2013. http://www.theses.fr/2013LEHA0008/document.
Full textAGold catalysts, as soft carbophilic Lewis acids, have rapidly develop and mature to become nowadays an outstanding tool for new C-C and C-X bonds (X = O, S, N) through π-bond activation. Moreover, its σ-Lewis acidity was also acknowledged and exemplified by numerous examples of carbonyl, imine, π-activated alcohol and epoxide activation. As part of our ongoing studies on N-acyliminium ion chemistry, we have been interested in using gold catalysts for N-acyliminium ion generation. First, we have shown that the σ-Lewis acidity of gold(I) and gold(III) could be exploited to efficiently catalyze the nucleophilic substitution reactions of various alkoxy- and acetoxylactams, precursors of N-acyliminium ions. The reaction was found to tolerate a wide range of nucleophiles, including allyltrimethylsilane, silyl enol ethers, arenes as well as active methylene derivatives. Next, gold catalysis was applied to cascade α-amidoalkylation/hydroarylation sequences unifying both the σ- and π-Lewis acid properties of gold complexes. Alternatively, Brønsted acid/Lewis acid multicatalysis approach has been alternatively developed to override some limitations featuring this unprecedented tandem intermolecular Friedel–Crafts/intramolecular hydroarylation sequence. This two complementary and highly efficient cascade sequences enable expedient access to complex fused polycyclic structures from trivial materials
Bac, Alain. "Nouveaux matériaux organophiles filmogènes à squelette inorganique : application à l'extraction par pervaporation de composés organiques en solution aqueuse." Vandoeuvre-les-Nancy, INPL, 1996. http://www.theses.fr/1996INPL050N.
Full textDrouillard, Joe͏̈lle. "Utilisation de zéolithes dans les réactions de type Friedel-Crafts : acylation et alkylation du thiophène." Poitiers, 1995. http://www.theses.fr/1995POIT2266.
Full textAzizi, Mohamed Salah. "Développement des nouvelles réactions catalytiques en chimie des ions N-acyliminiums initiées par l’acide triflimidique : diastéréosélectivité et multi-catalyse." Thesis, Le Havre, 2014. http://www.theses.fr/2014LEHA0004/document.
Full textMalic acid is an inexpensive natural product which is widely used as a chiral source in natural product synthesis. N,O-acetals derived from malic acid are regularly used in N-acyliminium ions endocyclic chemistry. The use of this very popular class of iminium ion precursors is mainly limited to stereopure 4,5-di-acetoxy lactams, the C-C bond coupling reactions of which with various nucleophiles are frequently reported to exhibit insufficient diastereocontrol. Moreover, the subsequent separation of the resulting mixture of diastereoisomers might also be an issue. Hence, developing novel N,O-acetalic malic acid derivatives is desirable in order to improve the diastereoselectivity of this type of α-amidoalkylation reactions (and/or to facilitate the separation of diastereomers) which are frequently used as a pivotal step in the context of multi-step syntheses of natural products and analogues. The work described in this manuscript lies in this context, with the preparation of a library of novel stereopure N,O-acetals and their subsequent use in new, catalytic and diastereoselective transformations based on N-acyliminiums ions chemistry. This thesis firstly describes the improvement of the intrinsic trans diastereoselectivity of the α-amidoalkylation reactions of silyl enol ethers with N-acyliminium ions derived from malic acid, generated in situ under triflimidic acid catalysis. It is shown that the structure of both reaction partners can be tuned to raise diastereomeric ratios to very high levels up to 98:2. In a second phase of this work, the development of a multicatalytic cascade sequence involving an intermolecular Friedel-Crafts type -amidoalkylation catalyzed by triflimidic acid, followed by an intramolecular hydroarylation catalyzed by cationic gold(I) complexes, is presented. The methodology developed in this second part of our work combines two hot contemporary topics of organic synthesis, namely organocatalysis and gold catalysis, and allows extremely fast access to new, sophisticated fused polyheterocyclic chiral structures
Osegueda, Juan. "Synthèse et caractérisation de poly(aryl éther cétone amide)s." Thesis, Rouen, INSA, 2016. http://www.theses.fr/2016ISAM0022/document.
Full textSome demanding applications (especially in aerospace) require more and more semi-crystalline thermostable polymers with high temperature resistance and durability (Tg above 170 °C) while maintaining good processing properties (Tm not exceeding 350°C) suitable for industrial manufacturing.This work deals with the synthesis and characterization of new high performance poly(aryl ether ketone amide)s polymers from an EKKE monomer with carboxylic acid extremities. Thus, three amide condensation synthetic routes were studied: between carboxylic acids and isocyanates, between acyl chlorides and amines, and between carboxylic acids and amines by phosphorylation. The thermal properties and their correlation with the chemical structures of the obtained aromatic and semi-aromatic poly(aryl ether ketone amide)s are compared and especially detailed