Dissertationen zum Thema „Butadiène – Dérivés – Synthèse (chimie)“
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Zhang, Hui-Jun. „Novel syntheses from building blocks based on 1,3-butadienyl skeleton and new polysubstitued ruthenium based catalysts for regioselective allylation“. Rennes 1, 2010. http://www.theses.fr/2010REN1S011.
Der volle Inhalt der QuelleUn objectif de cette thèse était la préparation de nouveaux fragments organique à partir du squelette butadiényle et leurs applications en synthèse organique. Des 1,1,4,4-tétrahalo-1,3-butadiènes ont été préparés de façon stéréosélective. La réaction de ces butadiènes avec le butyllithium et leur couplage de Suzuki avec des acides arylboroniques constituent des transformations nouvelles et originales. De nouveaux gem-diboryldiènes, également d���excellents agents de couplage de Suzuki, ont été obtenus à partir des gem-dihalodiènes correspondants. Le traitement avec LiAlH₄ de 1,4-dicyano-1,4-bis(triméthylsilyl)-1,3-diènes a conduit à une nouvelle réaction de cyclisation induite par des hydrures pour former des cyclopentadiènes multi-fonctionnalisés avec de très bons rendements. Dans un deuxième objectif, une série de complexes inédits du ruthénium porteurs de nouveaux ligands Cp et N-O chelatants ont été conçus et préparés avec l’objectif d’obtenir de bonnes propriétés catalytiques en allylation de nucléophiles. Ces complexes ont été utilisés comme catalyseurs d’allylation et ont conduit pour la première fois à d’excellentes régiosélectivités en faveur des produits branchés à partir de substrats allyliques purement aliphatiques et à la préparation de dérivés vinylsilanes fonctionnels
Guillam, Anne. „Synthèse et cycloadditions [4+2] des 1,4-dialkoxybutadiènes“. Rouen, 1997. http://www.theses.fr/1997ROUES078.
Der volle Inhalt der QuelleDrelon, Mathieu. „Synthèse d’éthers insaturés dérivés de polyols par transformation du butadiène“. Thesis, Lille 1, 2019. http://www.theses.fr/2019LIL1R084.
Der volle Inhalt der QuelleGreen chemistry is today a priority axis of research and industry. The use of biobased compounds, safe solvents and economic processes is at the heart of this sustainable chemistry. In particular, many polyhydroxy compounds can be obtained by treatment of the biomass and use in this chemistry. The telomerization of butadiene catalysed by palladium on alcohol or polyol results in the formation of ethers with octadienyl chain. The reaction allows 100% atom economy which is in agreement with the previous concepts of sustainable chemistry. Our study relates the selective synthesis of mono-, di-, tri- or tetratelomers obtained by telomerization of butadiene on biosourced polyols. Optimization of the reaction was first carried out on the glycerol and then transposed on other biosourced polyols such as erythritol, pentaerythritol, methylglucose or sorbitol in order to obtain telomeres which ultimately have two functions. The kinetic studies of the telomerization reaction were also conducted under constant flow of butadiene to include this system in a continuous process. The installation of this system, from the production of biobutadiene from ethanol to its use in the telomerization reaction was carried out. Finally, the synthesized diols have been used in polycondensation reactions with diacids in order to produce alkyd resins present in the paint composition
Pages, Patrice. „Synthèse de pyrrolidines alpha-phosphorylées et des nitroxydes dérivés“. Aix-Marseille 1, 1990. http://www.theses.fr/1990AIX11311.
Der volle Inhalt der QuelleThomas, Anne. „Synthèse de dérivés pipéridiniques sur support solide“. Clermont-Ferrand 2, 2004. http://www.theses.fr/2004CLF21499.
Der volle Inhalt der QuelleVoisin-Chiret, Anne-Sophie. „Synthèse de nouveaux dérivés pyridiniques à visée cholinergique nicotinique“. Caen, 2005. http://www.theses.fr/2005CAEN4066.
Der volle Inhalt der QuelleThe present study describes, on the one hand, the synthesis, the physicochemical study and the biological evaluation of novel pyridylethers as potential nicotinic cholinergic receptor ligands. On the other hand, the Petasis reaction, a multicomponent reaction, is used in the pyridine series to synthesize novel complexes. In the first part, after a general review about nicotinic cholinergic receptors, their localization, their structure and their function as well as a description of different technologies used in parallel chemistry, the chemical study is developed. Various synthetic approaches to prepare pyridylethers were used, along with studies on stability and reactivity. A small but diverse chemical library was accomplished. The first biological results are reported. Further tests are currently under investigation. In the second part, after a general review about multicomponent reactions, the Petasis reaction was studied with an emphasis parallelization. The implementation of this reaction allowed us to obtain original compounds whose structure was investigated and determined as complex (1:1) of dioxaborolanone and an amine. The experimental part of this document describes the procedures and the physicochemical characteristics of the compounds presented. Finally, more than 270 bibliographical references replace this study in its chemical and biological context
Breton, Anne-Catherine. „Synthèse et caractérisation de copolymères dérivés de quinoxaline et de carbazole“. Thesis, Université Laval, 2012. http://www.theses.ulaval.ca/2012/28992/28992.pdf.
Der volle Inhalt der QuelleTrépanier, Isabelle. „Synthèse de cyclobutanes et de leurs dérivés fluorés“. Thesis, Université Laval, 2010. http://www.theses.ulaval.ca/2010/27663/27663.pdf.
Der volle Inhalt der QuelleBen, jamaa Abdelkhalek. „Hémiaminals trifluorométhylés dérivés de l'acide (L)-tartrique : synthèse et réactivité“. Thesis, Reims, 2017. http://www.theses.fr/2017REIMS002.
Der volle Inhalt der Quelle(L)-tartaric acid, a by-product of the wine industry, is a small chiral and polyfunctional molecule, affordable at low cost. Its chirality combined with the physical and chemical properties of fluorine enabled to afford original polyfunctional and optically pure nitrogen-containing heterocycles, incorporating a quaternary trifluoromethylated carbon.Our starting materials, the variously substituted trifluoromethylated cyclic hemiaminals derived from the (L)-tartaric acid, have been synthesized using two different methods : one is based on the cyclization of a trifluoromethylated keto amide in the presence of an amine, and the other one consists in a nucleophilic trifluoromethylation of a cyclic imide.These hemiaminal derivatives constitute N-acyliminium precursors in various diastereoselective α-amidoalkylations. However, the addition of C-nucleophiles has shown varying efficacy. The highly diastereoselective addition of nitriles on these hemiaminals, according to a Ritter-type reaction, led to the synthesis of original and optically pure oxazolines and (amido)pyrrolidin-2-ones including a chiral trifluoromethylated carbon.Key-words : Tartaric acid, Nucleophilic trifluoromethylation, Asymmetric synthesis, Hemiaminal, N-acyliminium, Carbinamide, Ritter reaction
Uerpmann, Carsten. „Diazabutadiène et imino-pyrinides porteurs de radicaux nitroxyles : nouvelles briques pour la construction de matériaux moléculaires magnétiques. Radicaux N-ferrocènyl-N-tert-butyl aminoxyles synthèse et étude préliminaire“. Montpellier 2, 2001. http://www.theses.fr/2001MON20074.
Der volle Inhalt der QuelleMouaziz, Hanna. „Synthèse et polycondensation de macrocycles dérivés du 1,4,7,10-tétraazacyclododécane“. Le Mans, 2000. http://cyberdoc.univ-lemans.fr/theses/2000/2000LEMA1014.pdf.
Der volle Inhalt der QuelleHénault, Christelle. „Synthèse de récepteurs (poly)cyclo-bis-intercalants dérivés d'acridine“. Aix-Marseille 3, 2001. http://www.theses.fr/2001AIX30076.
Der volle Inhalt der QuelleThe molecular recognition of planar substrates needs the preparation of receptors molecules built on planar bubunits. Heterocyclic dye molecules interact with planar substrates by stacking, or with double stranded nucleic acids by intercalation. In the previous work, our goal was to incorporate two subunits-type into macropolycyclic systems called (poly)cyclo-bis-intercalands. For this purpose, symmetrical diazoted and dioxygenated acridinone and acridine derivatives have been choosed as moieties units. We report here the preparation of several series of these tricyclic planar compounds and their use as monomeric synthons for building artificial (poly)cyclo-bis-intercalands receptors of large size. In the first part of this work, we describe a general synthesis of several members of a novel class of cyclo-bis-intercalands resulting from the double bridging of two acridinone-type subunits. Macrocyclic dimeric structures were readily obtained via the efficient [2-2] condensation between diazoted and dioxygenated derivatives acridinone and various linear polymethylenic and oxopolyethylenic a,w-dichlorides acids
Leroi, Corinne. „Nouvelles applications pour les alcoxyamines en chimie organique fine“. Lyon 1, 2003. http://www.theses.fr/2003LYO10172.
Der volle Inhalt der QuelleGaval, Pooja. „Catalyseurs pour la synthèse du butadiène via le procédé Ostromyslensky développés par Chimie organométallique de surface“. Thesis, Lyon, 2018. http://www.theses.fr/2018LYSE1315/document.
Der volle Inhalt der QuelleIn the recent years on-purpose synthesis of butadiene using bioethanol has gained unprecedented attention owing to rise in interest for bio-based feedstock along with the steeply increasing demand for butadiene (BD). In this regard a relevant process is the Ostromyslensky’s two-step process, involving dehydrogenation of ethanol to acetaldehyde in a separate step, followed by butadiene production in the second stage by co-feeding ethanol and acetaldehyde. Although the economic viability and feasibility of this ethanol to butadiene (ETB) process is well established, there is a room for better catalytic performances and selectivity. In this endeavour our aim was to develop a family of well-defined Ta-based silica-supported catalysts through Surface Organometallic Chemistry (SOMC) and test them in the conversion of EtOH/AA to BD. The first set of pre-catalysts was synthesized by treating the previously known [(=SiO)2TaHx] with N2O as mild oxidant. The second family of catalysts was prepared by calcination of the tantalum alkyl species at 500°C. The pre-catalysts were characterized by FTIR, SS NMR, UV-vis-DRS, XRD, EXAFS and HR-STEM. The N2O oxidized SOMC pre-catalysts were found to have mostly isolated [(=SiO)2Ta(OH)x] species populating the surface whereas the family of pre-catalysts synthesized via calcination evidenced a mixture of surface species, including string-like aggregations.Catalytic tests over these catalysts generated promising results exhibiting superior catalysis in the transformation of EtOH/AA to BD in terms of both BD selectivity and yield compared to the state of the art. In addition to the excellent selectivity a narrow range of product distribution and negligible coke formation was observed. Isolated TaOx species on the N2O oxidized pre-catalyst showed markedly better activity and were found to be the active sites in this conversion compared to the string-like aggregation of tantalum centres on the calcined material. Based on this and in-situ DRIFT studies over the catalysts a preliminary mechanism for this conversion was proposed
Surpateanu, Georgiana. „Structure et réactivité d'ylures de triazolium : applications à la synthèse des dérivés isoindoliques“. Lille 1, 2000. https://pepite-depot.univ-lille.fr/LIBRE/Th_Num/2000/50376-2000-418-419.pdf.
Der volle Inhalt der QuelleGaly, Nicolas. „Synthèse de 13-aryl stéroïdes et études de diverses réactions de synthèse“. Aix-Marseille 3, 2010. http://www.theses.fr/2010AIX30053.
Der volle Inhalt der QuelleOur work is divided in 6 chapters. The first chapter is a bibliographical introduction concerning the biological activity of steroids, their total synthesis, the previous results of the laboratory, the presence of natural steroids with a 17-vinyl group. In the second chapter are shown results concerning the total synthesis of 13-p-bromophenyl-11,11-di(methoxycarbonyl)-3-methoxy-17b-vinylgonatrienes and of derivatives resulting from modifications of their side chain. In the third chapter, we show results about the condensation of ketals of ethylene glycol and catechol with the allylsilane and we show that the diallylation of catechol ketals leads to 4,4-dialkylhepta-1,6-dienes which should later be cyclised in 4,4-dialkylcyclopentenes. Various 1,1-dialkyl-2,5-divinylcyclopentanes are obtained by condensation with the 1,8-bis(trimethylsilyl)octa-2,6 diène (Bislro). Some compounds obtained by condensation of diallylsilanes on anhydrides undergo a metathesis reaction. The results, which constitutes chapter fourth, vary with the catalyst precursor used. The fifth chapter shows the results of ab initio calculalions which were carried out to solve the structure of cationic intermediates of the homoallenic transposition. They are supported by the hydrolysis of deuterated b-allenic tosylates. The sixth chapter is about the synthesis and the reactivity of the C2 molecule
Silva, Vinicius Barros Ribeiro da. „Synthèse et évaluation biologique de nouveaux dérivés imidazoliniques, thiazoliniques et d'aminosucres“. Thesis, Université Grenoble Alpes (ComUE), 2017. http://www.theses.fr/2017GREAV022/document.
Der volle Inhalt der QuelleThe epidemiological situation of infectious and parasitic diseases has presented significant changes worldwide. This group of diseases continues to pose challenges to prevention programs, such as the ebola virus epidemic, which is responsible for more than 11,000 deaths in 2015, the emergence of the zika virus in Brazil, the cases of schistosomiasis in the region of Corsica, France, in 2014, not including the exposure of patients to endemic areas in tropical countries. This scenario reflects the social transformations that have occurred in the last decades, characterized by accelerated urbanization, communication between continents, among other factors that contributed to the delineation of the current epidemiological profile of infectious and parasitic diseases worldwide. Schistosomiasis mansoni is a severe parasitosis caused by the Schistosoma mansoni trematode. Currently, praziquantel (PZQ) is the only drug capable of treating all the different forms of schistosomiasis. The imidazolidines are represented by a group of pentagonal heterocyclic substances possessing diverse biological activities, among them the schistosomicidal activity. The first objective of this work is the investigation of the schistosomicidal activity of new thioxoimidazolidine derivatives. In this context, 24 new arylidene-3-(2-chloro, 6-fluoro)-benzyl-imidazolidin-2-thioxo-4-one derivatives of (PTS) were obtained. After principal component analysis (PCA), the most dissimilar derivatives were evaluated biologically. The indolyl-imidazolidinic derivative, LPSF / PTS-14, presented greater results than PZQ, 100% death of worms in 24 h at 5 μg / mL, and a toxicity below 5 μg / mL against BALB splenocytes / C mice. These results, combined with low cytotoxicity, stimulated the development of a pharmacophor model using FLAP software, as well as the evaluation of the mode of action by the Michael Addition reaction, and the development of a prediction model for cytotoxicity. The second objective of this work was the accomplishment of a bibliographic study about the PZQ, making it possible to propose a model relating chemical structure and biological activity. Then, in works still under development, a model of pharmacophores will be proposed, and prediction of activity through chemometric methods made. In relation to bacterial infections, the appearance of superbugs, such as the Escherichia coli strain resistant to all antibiotics available in the clinic in 2016, again calls attention to the development of new antibiotics. Aminoglycosides, such as Neamine, are a family of substances of natural or semi-synthetic origin that are effective against Gram (+) and Gram (-) bacteria. The third objective of this work was the synthesis of analogues of Neamine from N- Acetyl-D-glucosamine and the use of metathesis reactions. Although none of the proposed derivatives were synthesized in the allotted time, important advances were made in the proposed routes, and key intermediaries were obtained. It was also possible to develop an evaluation study between the compatibility of protective groups used in derivatives and the occurrence of metathesis reactions. These studies led to the proposition of a synthetic route compatible with the protective groups, initiated at the end of this work, and to be concluded in the future
Renault, Olivier. „Les acides 3-amino-3-arylpropioniques dans la synthèse de nouvelles aminocyclopentathiophénones à visée antinéoplasique et arylpipéridines à visée nicotinique“. Caen, 1999. http://www.theses.fr/1999CAEN4040.
Der volle Inhalt der QuelleBolduc, Mélanie. „Synthèse chimio-enzymatique de dérivés chiraux du glycérol“. Thesis, Université Laval, 2010. http://www.theses.ulaval.ca/2010/26698/26698.pdf.
Der volle Inhalt der QuelleHoreau, Maxime. „Synthèse de dérivés poly-aza-hétérocycliques pour une application en chimie supramoléculaire“. Nantes, 2015. http://archive.bu.univ-nantes.fr/pollux/show.action?id=6b0d83b1-eafe-434b-8763-58a9aa87721f.
Der volle Inhalt der QuelleAza-aromatic oligoamide foldamers self-organise in helical structures and can find an application in the field of molecular recognition. Single-stranded helices with a wide diameter at their centre and a shortened diameter at their extremities define a central cavity isolated from external medium and covered with hydrogen bonding acceptors and donors, which allow guest molecules to be encapsulated. This thesis aim at the elaboration of original foldamers whose helical structure, required for molecular recognition, will be induced through metal coordination. This conformational change is based on the presence of a carefully designed central linker that acts as a molecular hinge. The key linker studied in this work is a pyridazinepyridine-pyridazine compound introduced in two oligoamide sequences in order to generate two model foldamers. After the description of the synthesis of these targets, their complexation to several metals has been studied. The concept of molecular hinge, allowing to induce the helical structure in a totally controlled manner, has been validated. In order to conclude this work, an encapsulation study of several guest molecules has been conducted on this new generation of foldamer. Another aspect addressed in this thesis is the design and the synthesis of a high molecular weight foldamer, spontaneously helically folded, and possessing an enlarged cavity to anticipate the encapsulation of large substrates
Gonnot, 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.
Der volle Inhalt der QuelleThis 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
Achelle, Sylvain. „Synthèse de nouveaux oligomères possédant un ou plusieurs motifs diaziniques : applications en tant que cristaux liquides et matériaux fluorescents“. Rouen, INSA, 2007. http://www.theses.fr/2007ISAM0012.
Der volle Inhalt der QuelleChapelon, Anne-Sophie. „Chimie des allylsilanes et application à la synthèse de précurseurs de la vitamine D3“. Aix-Marseille 3, 2007. http://www.theses.fr/2007AIX30078.
Der volle Inhalt der QuelleThis work deals with the reactivity of allylsilanes and their use in the synthesis of vitamin D3 precursors. The first chapter depicts reactions between 1,4-bis(trimethylsilyl)-2-butene and various substituted aromatic aldehydes leading to the corresponding vinylallylbenzenes. This part also reviews the synthetic scope of 1,8-bis(trimethylsilyl)-octa-2,6-diene (BISTRO) involved in the synthesis of divinylcyclopentanes which were used as building blocks for the preparation of vitamin D3, precursors. The second chapter reviews various works related to the synthesis of vitamin D3, precursors. In this part, we have prepared a fulvene derivative of cycle A as well as a parent compound of bicycle CD threw 1,3 dipolar cycloaddition. Finally, we have achieved the enantioselective synthesis of a sulfonyl derivative of bicycle CD. Functionalisation studies were then conducted on its side chain
Tabatchnik-Rebillon, Alexandra. „Synthèse de dérivés pyrroliques par régression de cycles et applications biologiques“. Nantes, 2009. http://www.theses.fr/2009NANT2102.
Der volle Inhalt der QuelleFor many years, our team has been particularly interested in the electrochemical reduction of monopyridazines into monopyrroles. This original and smooth methodology allows the access to monopyrrolic compounds, by extrusion of a nitrogen atom from the correspondent pyridazinic precursor. During the course of this thesis, we made the most of this strategy for synthesizing bipyrrolic chains from bipyridazinic precursors. Except for the synthetic challenge represented by those two families of polyazaheterocycles, their interest lays in their numerous potential applications in fields like biology or supramolecular chemistry. Two series of bipyrrolic structures were therefore studied :The a a'-bipyrrolic series, called linear, in which pyrrolic systems are directly linked to each other The bipyrrolic series, called alternate, in which pyrrolic units are linked by a spacer, like a pyridine Each series of compound ends by a pyridyl functionali sewith one more methyl groups. For each targeted compound, our study took place in the following order :I Preparation of « linear and alternate » bipyridazinic precursors II – Study of their reduction into the correspondent bipyrrolic derivative by an electrochemical way III Experimental and theoretical study of the conformations of the two kinds of families and their preferred complexation sites IV Evaluation of their potential for biological applications and a supramolecular perspective
Le, Gac Stéphane. „Synthèse et auto-assemblage de récepteurs moléculaires ditopiques dérivés de calix[6]arène“. Le Havre, 2006. http://www.theses.fr/2006LEHA0016.
Der volle Inhalt der QuelleThe realisation of ditopic molecular receptors derived from calix[6]arenes has been studied according to three different methodologies. The formation, thnaks to cooperative and allosteric processes, of sophisticated hetero self-assembled receptors has been achieved. The originality of theses edifices stands in the fact that the processes are directed by the inclusion of the guests, thus increasing the preorganisation degree of the hosts and directionnality of the interactions between the sub-units. [1+1] macrocyclisation reactions have led efficiently to new calix[6]azacryptands and calix[6]azatubes. Endo-complexation of the guests was accomplished through induced fir processes according to two new original modes of recogintion, thus leading to multitopic receptors. A calix[6]arenic key intermediate possessing three of the six amino groups regioselectively protexted have been obtained quantitatively, conducting to the first ditopic calix[6]azacryptand able to perform ion pair recognition
Champagne, Amélie. „Synthèse et caractérisation de nouveaux matériaux dérivés de la polyaniline“. Thesis, Université Laval, 2011. http://www.theses.ulaval.ca/2011/28424/28424.pdf.
Der volle Inhalt der QuelleOrtin, Yannick. „Synthèse et réactivité de complexes manganèse-propynylidène dérivés du méthylcymantrène“. Toulouse 3, 2002. http://www.theses.fr/2002TOU30036.
Der volle Inhalt der QuelleMartin, Sandrine. „Synthèse de ligands cyclopentadienyles et indenyles dérivés des sucres : applications en chimie organométallique“. Aix-Marseille 3, 1999. http://www.theses.fr/1999AIX30025.
Der volle Inhalt der QuelleLabéguère, Frédéric. „Synthèse de nouveaux synthons glycosyl-α-aminoacides et de glycopeptides dérivés“. Montpellier 2, 2001. http://www.theses.fr/2001MON20188.
Der volle Inhalt der QuelleGosset, Cyrille. „Réactions photorédox appliquées à la valorisation du monoxyde de carbone et du 1,3-butadiène“. Thesis, Lille, 2019. http://www.theses.fr/2019LIL1R034.
Der volle Inhalt der QuellePhotocatalysis field is of great interest because it allows development of eco-friendly processes and use of mild conditions. Many organic and organometallic photocatalysts, such as xanthenes, as well as ruthenium and iridium complexes were then developed. To date, very few examples describe recovery of gases such as carbon monoxide and butadiene by photoredox catalysis. Therefore, the work presented in this thesis has reported synthesis of arylcarboxylic acids and fonctionalisation in position α of aldehydes, photocatalysed respectively by ruthenium tris(bipyridine) and eosin Y, under pressure of carbon monoxide. Valorisation of butadiene has also been described using Meerwein arylation from aryl diazonium salts, associated with Ritter reaction, photocatalysed by ruthenium tris(bipyridine). Meerwein arylation has also been conjugated to nucleophiles other than nitriles, as well as cyclisation steps for dihydroisoquinoleines and isochromanones synthesis. Finally, phtalides synthesis was carried out by intramolecular cyclisation, photocatalysed by 4CzIPN
Bouhroum, Saliha. „Synthèse et propriétés de complexation des dérivés thiacalix[4]arènes“. Université Louis Pasteur (Strasbourg) (1971-2008), 2006. http://www.theses.fr/2006STR13099.
Der volle Inhalt der QuelleThis work is devoted to the synthesis and characterisation of thiacalix[4]arene derivatives and to the study of their interactions with alkali, alkaline earth, heavy and transition metal ions. Two approaches have been used i) biphasic transfer of metal picrates from water into dichloromethane; ii) complexation in a single phase. The stability of the complexes in methanol and/or acetonitrile has been assessed by UV absorption spectrophotometry and potentiometry. The stoichiometry of the complexes in chloroform and the localisation of the cation in the ligand cavity have been determined by 1H NMR. The first part concerns the study of the extraction and complexation properties of two thiacalix[4]arenes-bis-crown-ethers. The results show that the replacement of methylene bridges by sulphur atoms decreases the extraction levels and the complex stability. However, these compounds can be more selective than calix[4]arenes, especially for caesium. The second part deals with the synthesis and study of the thiacalix[4]arene diethylamide, and the study of related p-adamantyl and the amidomorpholine derivatives. Results show the influence of the substituent in the para position and on the amide function on the binding abilities and the selectivity of these compounds. If a decrease of the performances of thiacalix[4]arenes amides with respect to corresponding calix[4]arenes is still observed, their selectivity for some heavy metal ions is improved. The third part reports on the synthesis of p-tert-butyl(thia)calix[4]arenes enriched in sulphur by substitution of the narrow rim by diethylthiophosphate functions, of corresponding calixarenes and of mixed derivatives bearing also ethyl ester groups. X-ray structures of some of the ligands were solved indicating their cone conformation. Extraction and complexation results showed that the presence of sulphur atoms in the molecules does not improve their affinity towards heavy metal cations. However, interesting selectivities are observed for silver and cadmium
Fournier, Ludovic. „Synthèse et évaluation de nouveaux groupements protecteurs photoactivables dans le visible“. Paris 6, 2010. http://www.theses.fr/2010PA066685.
Der volle Inhalt der QuelleBusch, Alexandrine. „Synthèse de dérivés de benzo- et pyridodiazines à propriétés optiques non linéaires potentielles“. Rouen, INSA, 2005. http://www.theses.fr/2005ISAM0004.
Der volle Inhalt der QuelleAouf, Nour-Eddine. „Synthèse, structure et réactivité de sulfahydantoi͏̈nes dérivées d'aminoacides par insertion de sulfamoyle“. Montpellier 2, 1994. http://www.theses.fr/1994MON20095.
Der volle Inhalt der QuelleLe, Brazidec Jean-Yves. „Synthèse de bêta-C-glucosides catalysée par le palladium(0) et application à la synthèse de dérivés oxacycliques“. Aix-Marseille 3, 1995. http://www.theses.fr/1995AIX30063.
Der volle Inhalt der QuelleAlves, Marie-Hélène. „Nouvelles approches de synthèse de dérivés de l'acide L-iduronique à partir de glyconolactones“. Nancy 1, 2005. http://www.theses.fr/2005NAN10020.
Der volle Inhalt der QuelleThis work deals with the development of new synthetic approaches of a saccharidic sub-unit, present in the active pentasaccharide of heparin. This unit, which has L-ido configuration, has to be obtained from cheap and abundant sugars. The first part of this work concerns the pursue of researchs about activated gluconamides cyclisation strategy, with inversion of configuration at C-5. The second part is oriented on transformation of glucose into L-iduronic acid, performed thanks to efficient protection sequence and lactonisation. The two latest parts concern the study of the conversion of L-gulono-1,4-lactone into L-ido derivatives by inversion of configuration at C-2. A short synthesis of L-idose and the preparation of methyl L-iduronates derivatives, fonctionnalised in position 3 by a methyl or benzyl group, are reported
Magueur, Guillaume. „Méthodologie de synthèse de composés di- et trifluorométhylés : application à la synthèse de dérivés fluorés de l'artémisinine“. Paris 11, 2005. http://www.theses.fr/2005PA114803.
Der volle Inhalt der QuelleCabral, dos Santos Leila. „Synthèse et évaluation de l'activité biologique de nouveaux dérivés imidazolidiniques 2, 3, 5-trisubstitués“. Aix-Marseille 2, 2005. http://www.theses.fr/2005AIX22950.
Der volle Inhalt der QuelleBoyer, Gérard. „Dérivés acridiniques pontés en positions latérales et pyrazolo acridanones : synthèse, physico-chimie, étude biologique“. Aix-Marseille 3, 1989. http://www.theses.fr/1989AIX30076.
Der volle Inhalt der QuelleHalsdorf, Jean-Marie. „Le zinc et ses dérivés : applications en chimie de synthèse et dans la thérapeutique“. Strasbourg 1, 1985. http://www.theses.fr/1985STR10471.
Der volle Inhalt der QuelleDevillard, Marc. „Dérivés ambiphiles : chimie de coordination d'un phosphine-alane, synthèse et réactivité de phosphine-boréniums“. Toulouse 3, 2014. http://thesesups.ups-tlse.fr/2647/.
Der volle Inhalt der QuelleThis work deals with the chemistry of ambiphilic derivatives that combine a Lewis base and a Lewis acid of general formula PE (E = B, Al). The first chapter deals with the study of phosphine-borane and phosphine-borenium adducts in peri position on a naphthalene backbone. First, the influence of the naphthyl backbone and the substituents at boron on the PB donor-acceptor interaction was studied with different analytical methods. This system was then applied to the prepration of boreniums stabilized intramolecularly by the phosphorus. The Lewis acidity as well as the reactivity of such species toward small molecules were studied. The second chapter focuses on the coordination chemistry of a phosphine-alane ambiphilic ligand containing a Csp2 linker toward M-Cl bonds in transition metal fragments of groups 9 to 11. The gold chemistry has been studied particularly in detail as well as the capability of the resulting complexes to promote cycloisomerisation processes catalytically. The third chapter further explores the coordination chemistry of the phosphine-alane ligand and focuses on its ability to behave as a Z-type ligand. The propensity of the aluminum atom to accept electron density from the isoelectronic gold(I) and platinum(0) has been assessed by experimental and computational means. The influence of the organic co-ligand on the strength of the interaction was also investigated. Finally, the reactivity of the platinum complex toward dihydrogen has been studied
Lai, Jonathan. „Ethers en C8 dérivés de polyéthylènes glycols, de l’isosorbide et du sorbitol : synthèse par télomérisation du butadiène et étude des propriétés amphiphiles“. Thesis, Lille 1, 2011. http://www.theses.fr/2011LIL10196/document.
Der volle Inhalt der QuelleThis paper describes the synthesis and physicochemical studies of amphiphiles based on ethylene glycol, isosorbide and sorbitol. Noteworthy in an actual context of green chemistry, the telomerization of butadiene, a pallado-catalyzed and industrially viable reaction, was used to obtain the corresponding unsaturated C8 ethers with a high atom-economy and smooth conditions. It provides access to non-ionic amphiphilic compounds with an octadienyl chain that can be hydrogenated to give the saturated derivatives. The physicochemical properties of octadienyl and octyl ethers based on tri-and tetra-ethylene glycol were compared using the HLD concept in order to determine the effects induced by the presence of unsaturations in the C8-chain on those properties. This manuscript describes an application of this reaction with isosorbide as nucleophile. Isosorbide is an asymmetric diol issuing from biomass. The corresponding ethers are good candidates to replace harmful short-ethers derived from ethylene glycols. The telomerization reaction with this substrate has been optimized to produce amphiphilic monoalkylated species, taking into account the asymmetry of the molecule. The synthesis challenge has been issued in the case of sorbitol, a hexitol obtained from the hydrogenation of glucose. Ethers derived from sorbitol are currently not easily accessible at the industrial scale. By hydrogenation of the products of telomerization, a fraction of pure saturated monoethers has been synthesized at the laboratory scale. The performances of this product, especially as foaming agent, are similar or even better than the ones of octylglucoside, a 100 % biodegradable alkyl glucoside
Rycke, Nicolas de. „Nouveaux analogues de la DMAP : synthèse et réactivité“. Versailles-St Quentin en Yvelines, 2011. http://www.theses.fr/2011VERS0024.
Der volle Inhalt der QuelleCatalysts which act as Lewis bases show a growing interest because of their capacity to promote a significant number of transformations in organic synthesis. Specifically, since its discover at the end of the 1960’s, 4-(dimethylamino)pyridin (DMAP) has been studied and introduced to accelerate the rate of several reactions such as the acylation of tertiary alcohols. The reactivity of this derivative is sometimes limited with deactivated substrates leading to a very slow conversion in products. First, we were interested on the synthesis of tricyclic triaminopyridins, strong analogs of DMAP and their reactivity was studied with the determinations of kinetic N and Lewis parameters thermodynamic basicity. Secondly, we prepared a new class of chiral DMAP derivatives, the structure of which is included in a paracyclophanic backbone. In parallel to this work, we developed a new nucleophilic probe which was involved in the comparison of the reactivity of aziridinium and azetidinium towards nucleophiles, by measuring their ring opening rates by UV-visible and RMN 1H spectrophotometry. Finally, the last part of this pH. D. Work was about the design and the synthesis of organocatalytic cages. This kind of derivatives would encapsultate substrates within its cavity to promote chemical reactions like enzymes do, while avoiding their difficulties of use such as a limited stability under certain protocols
Lormier, Anh Tuan. „Synthèse et résolution des dérivés biacridiniques fonctionnalisés sur les positions 2 et 2'“. Aix-Marseille 3, 2000. http://www.theses.fr/2000AIX30008.
Der volle Inhalt der QuelleThis work was aimed on the obtention, the resolution and thé derivatization of the [9,9'-biacridmyl]-2,2'-diol. The derivatives of 9,9'-biacridinyl type have a C2-symmetry axe and present inclusion properties; consequently, three synthesized compounds were able to give addition compounds. The [9,9'-biacridinyl]-2,2'-diol was obtained by demethylation of racemic 2,2'-dimethoxy-9,9'-biacridine, and the presence of the two enantiomers in the mixture was showed by using chiral NMR shift reagents. Physicochemical technical separations of diastereomers were applied and crystallisation gave pure optical R-(-)-[9,9'biacridinyl]-2,2'-diol enantiomer. From [9,9'-biacridinyl]-diol we also synthesized various compounds; among them, a crown ether and a macrocycle
Salame, Rim. „Synthèse biomimétique d'alcaloïdes dérivés de la lysine et étude phytochimique d'hoslundia opposita Vahl. (Lamiaceae)Titre“. Paris 11, 2010. http://www.theses.fr/2010PA114826.
Der volle Inhalt der QuelleIn this work, we have been particularly interested in the metabolism of the amino acid lysine as a precursor of C5 reactive units. Initially, we have shown that key intermediates in the metabolism of lysine could be mimicked efficiently in simple reactions conditions by the use of glutaraldehyde (which can be formally considered as a metabolite of lysine). A "toolbox" of small molecule has been prepared and subsequently exploited for the total synthesis of alkaloid. Based on our own biogenetic hypotheses, a total synthesis of tangutorine, an indole alkaloid isolated from Nitraria tangutorum, was achieved in three steps. These results from our work on tangutorine led us to discuss the actual structure of another alkaloid called nitraraïne and propose a biomimetic approach of the synthesis of natural substances such as komarovinine. A similar study, which can be seen as a multicomponent reaction, demonstrated that nitrarine, a complex alkaloid, could be formed spontaneously in biomimetic conditions and without any enzymatic assistance. We then turned our attention to an original family of alkaloids recently isolated from Myrioneuron nutans. Even if our biomimetic investigations towards myrioneurinol were disappointing, very promising results were obtained towards the total synthesis of myrobotinol, the most complex representative of this group up to now. A phytochemical study of the leaves of Hoslundia opposita, a plant collected in Ivory Coast, has been undertaken. This study allowed the isolation and characterization of a new molecule which origin does not appear to be artifactual and that we named hoslunforanone. A O-methylated analog was also characterized
Boscher, Sophie. „Synthèse et réactivité d'amines β-séléniées et d'amides dérivés“. Rouen, 1994. http://www.theses.fr/1994ROUES034.
Der volle Inhalt der QuelleFabis, Frédéric. „Synthèse et étude physico-chimique de nouveaux systèmes hétérocycliques thiophéniques à visée thérapeutique“. Caen, 2000. http://www.theses.fr/2000CAEN4002.
Der volle Inhalt der QuelleChabaud, Laurent. „Carboazidation d'allylsilanes chiraux : application à la synthèse totale d'alcaloïdes polyhydroxyles inhibiteurs de glycosidases“. Bordeaux 1, 2005. http://www.theses.fr/2005BOR13040.
Der volle Inhalt der QuelleGaulon-Nourry, Catherine. „Les N-vinyl-2-oxazolidinones, nouveaux diénophiles en hétérocycloaddition [4+2] : application à la synthèse asymétrique de N-glucosides originaux“. Le Mans, 2003. http://cyberdoc.univ-lemans.fr/theses/2003/2003LEMA1010.pdf.
Der volle Inhalt der QuelleOur project was to study the reactivity of N-vinyl-2-oxazolidinones as new dienophiles in inverse demand [4+2] heterocycloaddition. Having finalised an easy-made and efficient procedure to synthesize N-vinyl-2-oxazolidinones in high yields, we studied their reactivity towards various ß,?-unsaturated a-ketoesters as heterodienes. Under Eu(fod)3 catalysis in refluxing cyclohexane, the cycloadditions afforded original functionnalized dihydropyranes in good yields, moreover dispaying both high endo-selectivity and facial diastereoselectivity. The stereocontrolled transformation of the cycloaddition product let us synthesize original diastereomerically and enantiomerically pur sugar derivatives, possessing the N-(2-deoxy-glucosyl)oxazolidinone structure. Finally, promising preliminary results were obtained from the [3+2] cycloaddition between N-vinyloxazolidinone as a new dipolarophile and N-benzyl- -ethoxycarbonylnitrone, thus opening a new application field for N-vinyloxazolidinones
Veillard, Romain. „Les alcynylphosphines et leurs dérivés : nouvelles voie de synthèse par couplage C-P oxydant application en "click-chemistry"“. Caen, 2014. http://www.theses.fr/2014CAEN2047.
Der volle Inhalt der QuelleThis thesis was devoted to the synthesis and the structural modification of alkynylphosphine derivatives. A new method was developed based on an oxidative cross-coupling reaction between various copper acetylides and secondary phosphine oxides (dialkyl, diaryl, alkylaryl, allylalkyl and allylaryl) or secondary phosphine boranes (dialkyl) as organophosphorus coupling partner. In both cases the corresponding alkynylphosphine derivatives were obtained with moderate to good yields. This strategy was applied to the synthesis of a P-stereogenic enantioenriched alkynylphosphine borane. Silyl alkynylphosphine boranes were next engaged in a tandem desilylation/ [3+2] cycloaddition reaction with a set of azides to obtain triazolylphosphine boranes with good to excellent yields. After borane decomplexation the electronics properties of the corresponding triazolylphosphines were evaluated through the synthesis and IR spectroscopic analysis of their rhodium carbonyl complexes. Finally, palladium and copper complexes involving triazolylphosphine ligands were prepared and their catalytic activities were tested