Dissertationen zum Thema „Alcools – Synthèse (chimie)“
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Pop, Laura Ancuta. „Synthèse stéréosélective d'hétéroaryl alcools et alanines“. Phd thesis, INSA de Rouen, 2011. http://tel.archives-ouvertes.fr/tel-00940020.
Bouilleau, Laurent. „Utilisation en synthèse d'organolithiens allyliques alpha et gamma fonctionnels“. Poitiers, 1999. http://www.theses.fr/1999POIT2343.
Violleau, Frédéric. „Étude d'un procédé de synthèse et de décomposition en dérivés chlorés de chloroformiates, optiquement actifs ou non, en présence de chlorure d'hexaalkylguanidinium“. Toulouse, INPT, 2000. http://www.theses.fr/2000INPT018C.
Huguenot, Florent. „Réactivité d'imines et d'oxazolidines fluorées chirales : application à la synthèse d'aminoacides et d'aminoalcools fluorés énantiopurs : thèse pour le doctorat en sciences spécialité Chimie Organique“. Reims, 2004. http://theses.univ-reims.fr/exl-doc/GED00000050.pdf.
This thesis falls under the field of organofluorinated chemistry and the asymmetrical synthesis. We studied various original methodologies of synthesis of di- and trifluoromethyl enantiopur compounds starting from chiral fluorinated oxazolidines and ketimines. The trifluoromethyl ketimines and oxazolidines are prepared by reaction of the fluoral or trifluorométhyl ketones with chiral amines or aminoalcohols. The difluoromethyl analogues are obtained by exploiting the electrophilic properties of difluoroenoxysilanes. The reduction of fluorinated oxazolidines by the hydrides is completely stereoselective, which gives access to enantiopur di- and trifluoromethyl amines. Oxazolidines with Lewis acid form in situ iminium species, which give access to the a-aminonitriles, precursors of enantiopur a-amino acids and 1,2-diamines, and acces to b-aminoesters and the b-aminoketones, precursors of enantiopur b-amino acids and 1,3-aminoalcohols
Fernandes, Beiramar Jorge Miguel. „Etude de la promotion des catalyseurs CuZnAl pour la production d’alcools supérieurs à partir du biosyngaz“. Electronic Thesis or Diss., Lille 1, 2013. http://www.theses.fr/2013LIL10170.
This PhD thesis addresses design of novel catalysts for conversion of syngas obtained from biomass into alcohols. It is shown that the catalytic performance of copper-zinc catalysts in carbon monoxide hydrogenation is principally affected by dispersion of copper metallic phase. The performance of these catalysts is strongly affected by promotion with different elements. The activity of the promoted catalysts was correlated with the reducibility of copper phase; the ease of copper reduction leads to more active catalysts. In addition, promotion with iron, chromium and manganese significantly modifies the reaction selectivity. A spectacular increase in carbon monoxide hydrogenation rate was observed on iron-containing catalysts and was attributed to the formation of iron carbide species. Increasing iron content in the catalysts led to higher alcohols productivity and was also accompanied by significant activity in water gas-shift reaction. The catalysts exhibited relative stability in the presence of sulphur containing syngas
Pasco, Morgane. „Synthèse asymétrique de diamines cyclopentaniques polyfonctionnelles : des outils pour l'étude d'interactions avec l'ARN“. Paris 5, 2010. http://www.theses.fr/2010PA05P626.
In the laboratory, functionalized 1,3-cyclopentanic diamines have been developped to design new RNA ligands by mimicking the central framework of aminoglycosides. These diamines are easily obtained after functionalization of bicyclic hydrazines and cleavage of the N-N bond. Different synthetic routes has been explored to allow a regio-, diastereo- and in some cases enantioselective introduction of a fluorine atom on these polynitrogenated compounds. Binding experiments using 19F NMR highlighted a supramolecular chiral recognition phenomenon between the fluorinated diamines and RNA. This led to a split of the signal correlated with the location of the fluorine nucleus and the structure of the RNA. Fluorinated diaminocyclopentanes could then serve as useful probes for the study of ligand-RNA interactions. The desymmetrisation of meso 1,3- cyclopentanic diamines using allylic substitution reactions has been studied as well. With the use of iridium catalysis, the efficiency of the resolution of the two amines proved to be very low, and only stereochemistry of the allylic position has been fully controlled. However, the linear monoallylated product could been obtained with an enantiomeric exces up to 61 % using palladium catalysis
Harfouche, Joyce. „Nouvelles méthodologies de synthèse de ligands NN, NNO, et nos chiraux : utilisation en catalyse asymétrique homogène pour la réduction de cétones“. Lyon 1, 2005. http://www.theses.fr/2005LYO10147.
Gravil, Sébastien. „Utilisation d'enzymes en synthèse organique : accès à des alcools allyliques et époxydes d'esters d'énols chiraux, acétates de pyranose de configuration anomérique fixée“. Clermont-Ferrand 2, 2004. http://www.theses.fr/2004CLF21521.
Wang, Jingjuan. „Design of efficient catalysts for hydrogenation of carbon oxides to alcohols and olefins“. Electronic Thesis or Diss., Lille 1, 2012. http://www.theses.fr/2012LIL10052.
Catalytic hydrogenation of carbon monoxide and carbon dioxide leads to valorisation of syngas which can be produced from fossil and renewable resources. This thesis addresses design of new catalysts for synthesis of alcohols and olefins from syngas containing carbon monoxide and carbon dioxide. Catalyst characterization has demonstrated formation of bimetallic particles in copper-cobalt mixed supported catalysts and enrichment of metallic particles with copper on the outer surface in the reduced catalysts. Comparison with catalytic data suggests that these bimetallic particles probably contain the active sites for the synthesis of alcohols from syngas. The supports (SiO2, Al2O3 and carbon nanotubes), and some promoters, especially iron, also have a very strong influence on the catalyst performance. Promotion with iron also increases productivity of Rh catalysts in the synthesis of ethanol from syngas. The formation of interfaces between the iron and rhodium seems to improve the selectivity of this reaction to ethanol, while carbon monoxide conversion principally depends on rhodium dispersion. The Fe/ZrO2 catalysts promoted with potassium showed a very important selectivity for the synthesis of olefins from carbon dioxide. This increase in selectivity was attributed to the synergy between iron and oxidized species Fe0/χ-Fe5C2 which are involved in this reaction
Nguyen, Tien Thao. „Development of perovskite catalysts for the synthesis of higher alcohols from syngas“. Thesis, Université Laval, 2007. http://www.theses.ulaval.ca/2007/24583/24583.pdf.
Oukessou, Mohamed. „Synthèse, dérivation et évaluation de pharmacophores hybrides Alcynyl-TriAzolyCarbinols N-glycosylés“. Toulouse 3, 2014. http://thesesups.ups-tlse.fr/2387/.
The alkenyl-alkynylcarbinol function (AAC) is a key pharmacophore encountered in natural products extracted from marine sponges, the petrosiacetylenes, exhibiting various biological properties, and in particular a remarkable cytotoxicity on tumor cells. In a different context, the 1H-1,2,3-triazole (TA) core is a peptido-mimetic motif identified in several enzymatic inhitors, for example of beta-lactamases in the Tazobacatm(r) drug. The fusion -or intimate hybridization-and glyco-conjugation of these two pharmacophores is envisaged in unprecedented structures like N-glycosylated bis(1H-1,2,3 triazolyl)carbinols (BTACs), alkynyl-triazolylcarbinols (ATAC = ATAC(y)), or alkenyl-triazolylcarbinols (ATAC(e)). Such molecules were synthesized by Huisgen reaction of glycosyl azides, functional at the primary or anomeric position of O-protected (D)-ribose, (D)-galactose, or (D)-glucose units, with dialkynylcarbinols (DAC) and AAC substrates substituted in various manners at positions 1 and 3. These [2+3] cycloaddition dipolarophiles proved to react regio-selectively in standar click-chemistry conditions (CuSO4,5H2O + sodium ascorbate, in ethanol/water mixtures). The principle has been generalized to trialkynylcarbinol substrates, and the reactivity of the tris-(N-benzyl-1H-1,2,3-triazolyl)carbinol product, Taz3C-OH, was studied. In the presence of trifluoroacetic anhydride, the latter carbinol dissociates to the corresponding tris(triazolyl)carbenium - for which the term "trizyl cation" is coined, by analogy with the trityl cation-, whose SN1 reactivity with various O-, N-, S-and Cnucleophiles was found to selectively produce new structures, which are heterocyclic analogues of known or unknown triphenylmethane derivatives. Among the described new compounds, a few ATACs and BTACs were selected and tested for their inhibition activity towards enzymes (a-glucosidase and sphingosine kinase) or cytotoxicity towards tumor cells (adenocarcinome)
Hémelaere, Rémy. „Mise au point de réactions tandems catalytiques incluant une étape d'isomérisation pour la synthèse de molécules naturelles“. Thesis, Rennes 1, 2013. http://www.theses.fr/2013REN1S173/document.
Some of the new challenges of modern synthetic chemistry are: atom economy, employment of catalytic processes, avoidance of toxic reactants and limitation of purification steps. A lot of work has been devoted to the development of tandem reactions. A new reactivity could be generated in a molecule thanks to an isomerisation (or migration) reaction of an alkene. This reaction often needs an hydride specie which comes from a transition metal catalyst. This PhD thesis is about the development of new tandem reactions in which at least one step is an isomerisation of an olefin. A great attention has been dedicated to the synthesis of vinylboronates especially with a cross-metathesis strategy. These intermediates are of great importance in organic chemistry and can be useful in a wide range of reactions. One of those reactions is the transformation of vinylboronates to allylboronates thanks to an isomerisation step. Allylboronates can then react with aldehydes to generate homoallylic alcohols with total diastereoselectivity. These new reactions have found applications in total synthesis of natural molecules with a 2,3-dihydrobenzofuran core
Zhang, Jidong. „Utilisation des N-oxydes dérivés d'amino-alcools pour la synthèse de N-H pyrrolidines substituées en position 2, 3 ou 4 et pour l'α-fonctionnalisation d'amines secondaires“. Paris 11, 1989. http://www.theses.fr/1989PA112213.
Azomethine ylids generated from tertiary amine oxides by double deprotonation are the only azomethine ylids able to undergo intermolecular 3+2 cycloaddition with non-activated olefins. Thus, 3- or 4-substituted or 3, 4-disubstituted N-alkyl pyrrolidines can be obtained by a simple and direct method. It was important to develop this method for preparing N-H pyrrolidines found in natural products. In the first pan of this thesis, demethylation of N-methyl pyrrolidines was attempted using a variety of literature methods. However none of them appeared suitable for our purpose, mainly because of the lability of the 5 membered heterocyclic ring. Then, we looked for an amine oxide which could easily undergo 3+2 cycloaddition and whose N-alkyl group could be removed under mild conditions. We found that β-amino alcohol (protected) derived amine oxides gave good yields of the corresponding pyrrolidines. Hofmann elimination of the quatemary ammonium salt followed by debenzylation gave quantitatively the N-H pyrrolidines substituted in positions 2, 3 or 4. This methodology is used for the synthesis of a precursor of kainic acid and one of its analogues. In the second part, we propose an original and general method for functionalisation of secondary amines at α-position. β-amino alcohol (unprotected) derived amine oxides treated with t-butyllithium give oxazolidines after intramolecular trapping of the intermediate immonium by the alcoholate. Opening of the oxazolidine ring by a Grignard reagent and removal of the amino alcohol moiety (according to the sequence described above) give access to α-alkylated amines. Several exemples are reponed
Bruniaux, Sophie. „Nouveaux hydrotropes biosourcés : conception, synthèse et propriétés physico-chimiques en milieu hautement salin“. Thesis, Compiègne, 2017. http://www.theses.fr/2017COMP2378.
Historically, chemical industry was based on fossil ressources, but alternative processes have been developed since the nineteens to be green and to answer to the environmental eco-responsibility questions. In this context, a collaboration work between three public laboratories and the SAS PIVERT emerged to find new biosourced hydrotropes starting from various polyols – such as glycerol, main byproduct of the fuel production – and resistant to high saline conditions. A specific design was defined by our physico-chemical partner for the synthesis of hydrotropes. Differents approaches were used to obtain these compounds, such as a new method of methylation using sub/supercritical methanol with a phase of optimization, and another about the scope of the reaction that reduced the reaction steps. The transposition of the reductive alkylation of various alcohols was also realized – using a heterogeneous catalysis – with the obtention of various ethers, in continuous flow conditions, by the intermediate of the use of the HCube Pro from ThalesNano
Diaf, Ilhem. „Développement de nouveaux processus de cyclisation de dérivés alléniques catalysés par des triflates métalliques et synthèse de molécules odorantes“. Thesis, Nice, 2014. http://www.theses.fr/2014NICE4124.
Novel processes of metal triflate-catalyzed cyclizations of functionalized allenes are presented. Two strategies have been developed. In a first part, the intramolecular carbonyl-ene reaction with γ-allenic ketones is described. This reaction proceeds under very mild conditions using only 1 mol% of bismuth(III) triflate. The scope of this reaction was extended to several γ-allenic ketone derivatives, featuring various substitution patterns. The resulting dienols were successfully engaged in a Diels-Alder reaction allowing the formation of polycyclic functionalized frameworks in good yields with excellent regio- and diastereoselectivities. In a second part, the metal triflate-catalyzed cyclization of allenic-enol ethers is described. This reaction gives access to cyclopentene derivatives in good yields using only 0.1 mol% of bismuth(III) triflate. Dihydrofuran derivatives could also be formed using this strategy. This cycloisomerisation reaction proceeds through an initial enol ether activation, followed by the nucleophilic attack of the allene moiety. This reactivity could be inverted using a gold(I) catalyst, in the presence of an exogenous nucleophile, allowing the formation of different products. Within our interest in flavor and fragrance chemistry, allenic acetates and alcohols have been synthesized and subjected to olfactive evaluation, revealing dominant fruity and floral notes. Green and woody undertones have been detected as well
Vaton-Chanvrier, Laurence. „Synthèse et greffage sur silice de dérivés de l'acide cholique. Evaluation de l'énantiosélectivité par chromatographie liquide haute performance“. Rouen, 1999. http://www.theses.fr/1999ROUES078.
Batt, Frédéric. „Approches synthétiques vers le mycothiazole-4,19-diol : utilisation du palladium en synthèse organique“. Phd thesis, Université Claude Bernard - Lyon I, 2009. http://tel.archives-ouvertes.fr/tel-00654585.
Ratajczak, Fabien. „Synthèse et réactivité de nitroxydes chiraux“. Université Joseph Fourier (Grenoble), 1997. http://www.theses.fr/1997GRE10134.
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.
SPASSOVA, NADEJDA. „Etude d'une nouvelle methode radicalaire pour la desoxygenation des alcools. Nouvelles approches radicalaires : synthese de -aminotetralones et reduction de derives iodes“. Palaiseau, Ecole polytechnique, 2000. http://www.theses.fr/2000EPXX0053.
Feraud, Michel. „Substances naturelles : nouvelles méthodologies d'élaboration de briques moléculaires à méthylène exocyclique : application à la synthèes diastéréolective de la (+-)-cis-gamma-irone“. Aix-Marseille 3, 1996. http://www.theses.fr/1996AIX30063.
Mercey, Guillaume. „Nouvelles synthèses et applications de β [béta]-aminothiols“. Caen, 2009. http://www.theses.fr/2009CAEN2055.
The first part of this work deals with a new method to synthesize primary béta-aminothiols from easily accessible starting materials, an aminoalcohol and a dithioester. A large series of compounds was prepared by this way in good overall yields. This methodology was then extended to secondary béta-aminothiols. Two routes have been employed, depending on the starting aminoalcohol. The N-methyl cysteamine and the prolinethiol were synthesized from the corresponding secondary aminoalcohols via a thiazolidine. The second method starts from primary aminoalcohols. The key intermediate is a thiazolinium salt of which substituents on the heterocycle and on the nitrogen atom can be easily modified, affording various aminothiols. In a second part, the previously prepared 2-aminothiols were used to synthesize heterocyclic compounds. New 2H-thiazolines were obtained by reacting aminothiols with ethyl orthoformate. The N-alkylation of these thiazolines led to the corresponding thiazolinium salts. Finally, starting from 2-benzyl-2-amino-ethanedisulfides, a new family of 3-aminothiochromans was prepared. The reaction involved in this transformation is a new example of a direct introduction of a sulfanyl group on the benzene ring via an electrophilic aromatic substitution. In the particular case of an N-allyl derivative, a thiomorpholine was obtained (instead the expected thiochroman) via an intramolecular hydrothiolation of the allylic double bond
Andreu-Solano, Raquel. „Synthèse, propriétés redox, mesogenes et optiques non linéaires de nouveaux tetrathiafulvalènes“. Angers, 1996. http://www.theses.fr/1996ANGE0012.
Lhomme, Julien. „Nouveaux catalyseurs et systèmes catalytiques appliqués à la synthèse du polyuréthane via la réaction isocyanate – alcool“. Thesis, Lyon, INSA, 2013. http://www.theses.fr/2013ISAL0158/document.
The aim of this work is to replace organotin and organomercury catalysts used for the synthesis of polyurethane via the isocyanate – alcohol reaction. A bibliographic review revealed that basicity and nucleophilicity of an organic catalyst affect its activity and the reaction mechanism it induces. For organometallic catalysts, these catalytic properties can be explained by electronic considerations and by the HSAB principle. On the other hand, a comprehensive study of the organomercury catalyst highlighted the benefit to combine it with a carboxylic acid, preferably with a long carbon backbone. This slows down hydrolysis of the catalyst while increasing its selectivity toward the isocyanate – alcohol reaction. New original catalysts or catalytic systems were then evaluated using a simplified experiment. Three organometallic catalysts were selected for further testing in conditions closer to industrial ones. They all showed appropriate catalytic activity, but the zinc II -diketonate is the only one to provide a colorless and transparent prepolymer, two essential criteria for the intended applications. This complex could therefore replace the organotin catalyst. Finally, the study of the selectivity of catalytic systems involving a commercial catalyst in the presence of neodecanoic acid confirmed its protective role toward hydrolysis. The previously retained zinc complex was also evaluated and revealed a selectivity 2.5 times greater than that of the organomercurial complex to replace
Bombarda, Isabelle. „Hémisynthèses d'alcools sesquiterpéniques : application à la valorisation de la fraction hydrocarbure de l'huile essentielle de Vetiver Bourbon“. Aix-Marseille 3, 1994. http://tel.univ.run.elgebar.univ-reunion.fr/H/1994_Bombarda_I.pdf.
Lagnel, Béatrice. „Valorisation du larixol en chimie fine : applications à la synthèse de drimanes et labdanes fonctionnalisés“. Université Joseph Fourier (Grenoble), 2001. http://www.theses.fr/2001GRE10036.
Niu, Feng. „Development of novel catalysts for selective amination of alcohols“. Thesis, Lille 1, 2019. http://www.theses.fr/2019LIL1R068.
Amines are very important intermediates for chemical industry and life science, which can be synthesized through different traditional routes. Metals based catalytic amination of alcohols via the so-called “hydrogen borrowing” mechanism is a relative efficient and environmental benign way for synthesis of different primary amines. However, there are still some challenges exist, such as high cost of noble metals, low selectivity of primary amine products, and poor stability and recyclability for industrial applications. To solve these problems, different strategies have been applied in this thesis. Carbon deposition produced by catalyst pre-treatment with alcohols under the optimized conditions has been employed for major enhancement of the selectivity of alcohol amination to primary amines (from 30-50 to 80-90%), which arises from steric hindrance in hydrogenation of bulky secondary imines as intermediate products over partially carbon-decorated cobalt nanoparticles. An efficient approach to protect cobalt catalyst from catalytic deactivation by liquid bismuth promotion with different loading content was disclosed for selectively amination of 1-octanol. The N-alkylation of amines by alcohols over a cheap and efficient heterogeneous catalyst-titanium hydroxide was also proposed. The catalyst with mild Brönsted acidity provides the selectivity higher than 90% to secondary amines for functionalized aromatic and aliphatic alcohols and amines at high catalytic activity and stability
Ronsin, Gaël. „Acylation d'un alcool achiral et d'un thiol chiral par le méthylphénylcétène : catalyse et sélectivité“. Rouen, 1999. http://www.theses.fr/1999ROUES025.
Gregoire, Brigitte. „Synthèse arynique de benzocyclobutenols fonctionnels : Quelques propriétés chimiques et pharmacologiques“. Nancy 1, 1986. http://www.theses.fr/1986NAN10398.
FRATONI, DAVIDE. „Amino Alcohols and Diamines: Novel Syntheses of Enantiopure Molecules useful in Catalysis“. Doctoral thesis, Università degli Studi di Camerino, 2012. http://hdl.handle.net/11581/401805.
Thavornprasert, Kaew-arpha. „Production of acetals from bio-resourced alcohols over bifunctional catalysts“. Electronic Thesis or Diss., Lille 1, 2013. http://www.theses.fr/2013LIL10016.
The severe environmental issues caused by the fossil-based sources consumption have driven numerous studies to find alternative sustainable resources. Biomass is a renewable feedstock for a large spectrum of valuable chemicals especially for fuels applications. Acetals, dimethoxymethane (DMM) and diethoxythane (DEE), can be produced from biomass-derived methanol and ethanol, respectively. Herein, a concept of synthesizing acetals via a one-step alcohol conversion is applied instead of the currently used two-steps reactions of alcohol partial oxidation/acetalization. The DMM synthesis is studied on FeMo mixed oxide having needed redox/acidic functions. 50 % of DMM yield is achieved at 255 °C on the catalyst with a Mo/Fe ratio of 3.2. DMM selectivity is boosted when using a methanol-rich (40 mol.%) feed and a high selectivity is kept up to 60 % of methanol conversion. A synergistic effect between Mo and Fe species on the conversion is evident. The active sites incorporating Mo and Fe cations is suggested, involving lattice O2- and anionic vacancies generated by surface dehydroxylation. LEIS analysis confirms the presence of Mo and Fe species in the outermost atomic layer. XPS and in situ EPR studies show that Fe centers provide the redox property. The acidity is brought by anionic vacancies acting as Lewis acid. XPS results confirm the role of gas-phase O2 to reoxidize the surface and regenerate the active sites. FeMo-based catalysts were applied in the DEE synthesis due to analogous pathways of methanol/ethanol reactions. The catalyst is not selectively to acetal DEE as expected, probably due to the steric hindrance or to the inadequate acidic strength of the FeMo system
DIAGNE, CHEIKH T. „Transformation du gaz de synthese en alcools sur catalyseurs a base de palladium et de cobalt-cuivre : aspects mecanistiques“. Université Louis Pasteur (Strasbourg) (1971-2008), 1988. http://www.theses.fr/1988STR13199.
Posseme, Françoise. „Synthèse et évaluation biologique d'analogues borylés et fluorés de polyamines. Nouvelle voie d'accès stéréocontrôlée ayx (E)-(gamma-alocoxyallyl)boronates alpha-substutués“. Rennes 1, 2001. http://www.theses.fr/2001REN10149.
Al, Badri Hashim. „Synthèse et réactivité d'énamines phosphoniques fonctionnelles et de phosphonates allyliques. Applications à la synthèse de diènes fonctionnels utilisés dans la réaction de Diels-Alder“. Rouen, 1996. http://www.theses.fr/1996ROUES054.
Niu, Feng. „Development of novel catalysts for selective amination of alcohols“. Electronic Thesis or Diss., Université de Lille (2018-2021), 2019. http://www.theses.fr/2019LILUR068.
Amines are very important intermediates for chemical industry and life science, which can be synthesized through different traditional routes. Metals based catalytic amination of alcohols via the so-called “hydrogen borrowing” mechanism is a relative efficient and environmental benign way for synthesis of different primary amines. However, there are still some challenges exist, such as high cost of noble metals, low selectivity of primary amine products, and poor stability and recyclability for industrial applications. To solve these problems, different strategies have been applied in this thesis. Carbon deposition produced by catalyst pre-treatment with alcohols under the optimized conditions has been employed for major enhancement of the selectivity of alcohol amination to primary amines (from 30-50 to 80-90%), which arises from steric hindrance in hydrogenation of bulky secondary imines as intermediate products over partially carbon-decorated cobalt nanoparticles. An efficient approach to protect cobalt catalyst from catalytic deactivation by liquid bismuth promotion with different loading content was disclosed for selectively amination of 1-octanol. The N-alkylation of amines by alcohols over a cheap and efficient heterogeneous catalyst-titanium hydroxide was also proposed. The catalyst with mild Brönsted acidity provides the selectivity higher than 90% to secondary amines for functionalized aromatic and aliphatic alcohols and amines at high catalytic activity and stability
Milani, Roberto. „Matériaux à base de phosphazènes chlorés pour la fonctionnalisation de surface, la synthèse de précurseurs monomères et la chimie supramoléculaire“. Thesis, Lille 1, 2008. http://www.theses.fr/2008LIL10013/document.
To the research described in this thesis two principal topics of studies have been performed: - the use ofhexachlorocyc1otriphosphazene (HCCP) and poly(dichlorophosphazène) (PDCP) as coupling agents for the surface functionalization of solid substrates (inorganic materials containing organic silicon and polymerie materials), - The synthesis of phosphazenic compounds as new materials exhibiting the supramolecular structures
Yu, Zhifang. „Synthèse et stéréochimie d'organosilanes cycliques polyfonctionnels pentacoordinés“. Montpellier 2, 1990. http://www.theses.fr/1990MON20198.
Prom, Marie-Rose. „Solubilisation d'une huile essentielle dans un milieu hydroalcoolique à faible teneur en alcool“. Montpellier 2, 1990. http://www.theses.fr/1990MON20283.
Cornu, Agnès. „Synthèse et biosynthèse de composés modèles de complexes lignine-polysaccharides“. Grenoble 1, 1989. http://www.theses.fr/1989GRE10051.
Iloughmane-Gaspard, Hafida. „Ene reactivite d'alcenylsilanes et -germanes : synthese et stabilisation de metalloles du groupe 14“. Toulouse 3, 1986. http://www.theses.fr/1986TOU30214.
Bréault, Raymond. „Synthese de l'ethanol a partir de gaz de synthese (co+h::(2)) sur des catalyseurs au rhodium modifies : etude mecanistique“. Université Louis Pasteur (Strasbourg) (1971-2008), 1986. http://www.theses.fr/1986STR13034.
Lebarillier, Loïc. „Synthèse et étude de la réactivité des esters α-phénylséléniés“. Rouen, 1999. http://www.theses.fr/1998ROUES054.
Marek, Ilane. „Syntheses enantioselectives et diastereoselectives d'allenes fonctionnalises ou non“. Paris 6, 1988. http://www.theses.fr/1988PA066392.
Chemla, Philippe. „Reactions diastereospecifiques de dienones fer-tricarbonyle : applications a la synthese d'alcools fonctionnalises optiquement purs“. Université Louis Pasteur (Strasbourg) (1971-2008), 1988. http://www.theses.fr/1988STR13049.
Npetgat, Ngoutane Eloïne Arlette. „Elaboration de biocatalyseurs artificiels à deux composantes“. Electronic Thesis or Diss., Aix-Marseille, 2012. http://www.theses.fr/2012AIXM4354.
In recent years we are witnessing the development of new bio-catalysts which are hybrids combining the advantages of organometallic catalysis (robust and efficient system, but expensive) to those of enzymatic catalysis (ecological, specific but not very flexible). Among the various strategies used to create artificial enzymes, none of them has yet seriously considered to combine an enzyme activity with that of an organic compound. This is the new approach proposed in this work to try to orient the catalytic activity of the laccase, an oxidase with an industrial potential. The oxidation products of the laccase are phénoxy radicals which recombine in the medium regardless of the activity of the enzyme. In some plants, small proteins called "dirigent proteins" interact with phénoxy radicals leading to the formation of a single optically pure product. In this work, we tried to mimic the "dirigent proteins" by grafting a cyclodextrin-cage molecule near the active site of the laccase. As a first step, we performed the synthesis of organic modules called "platforms" with a) an anchor point to the enzyme, b) a group for functionalized protein purification c) a cyclodextrin that encapsulates a large number of organic molecules. By fluorescence and immunodetection measurements, we identified the optimal conditions for laccase functionalization and thus validated its derivatization. Monitoring the oxidation of coniferyl alcohol by the functionalized laccase with a cyclodextrined platform highlights a change in the kinetic profiles of the substrate and products. This difference appears due to the location of the cyclodextrin near the substrate oxidation site
Beji, Mohamed. „Heterocumulenes alpha -sulfonyles et leurs applications a la synthese de nouvelles structures heterocycliques : alkylation des esters sulfamiques en catalyse par transfert de phase“. Paris 7, 1987. http://www.theses.fr/1987PA077183.
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