Dissertations / Theses on the topic 'Hydrazine – Synthèse'
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Zerkout, Saïd. "Synthèse d'hydrazino peptides." Vandoeuvre-les-Nancy, INPL, 1994. http://www.theses.fr/1994INPL052N.
Full textGuevrekian, Soghomoniantz Marina. "Synthèse de nouvelles hydrazones dérivées d'hydrazines disubstituées en position 1 : étude de leurs propriétés antibactériennes, de leur cytotoxicité sur deux espèces d'algues et de leur toxicité sur les alevins de truites." Paris 7, 1985. http://www.theses.fr/1985PA07F059.
Full textRoussi, Fanny. "Synthèse asymétrique d'hydrazines mono et bicycliques polyfonctionnalisées via de nouvelles méthodes d'alkylations et de cycloadditions 1,3-dipolaires." Paris 5, 1999. http://www.theses.fr/1999PA05P620.
Full textSalas-Padron, Alejandrina. "Synthèse de la tertiobutylhydrazine : détermination du modèle cinétique, faisabilité du procédé." Lyon 1, 1988. http://www.theses.fr/1988LYO10142.
Full textCriton, Thomas. "Systèmes polyazotés énergétiques : stratégie de synthèse, caractérisation et réactivité." Thesis, Lyon, 2019. http://www.theses.fr/2019LYSE1222.
Full textHydrazines for propulsion have been identified by REACH regulation as Substances of Very High Concern (SVHC) and their use is therefore threatened. High Energy Density Materials (HEDM) represent a class of polynitrogen compounds with computed energetic performances breaking away from existing technologies. Besides solving toxicity issues thanks to their decomposition in molecular nitrogen, their use would highly simplify launcher’s technologies and decreases their cost. Two candidates have been proposed by the CNES and ArianeGroup to replace hydrazines: triaziridine (N3H3) and tetrazetidine (N4H4). The main goal of this thesis is to develop new methodologies for the synthesis of polynitrogen compounds and to investigate their reactivity to access to original structures such as triaziridine and tetrazetidine. Homologation of simple nitrogen-based compounds with azodicarboxylates enabled us to access new original superior polynitrogen molecules (N3, N4, N5, N6…). Structural evidences of these new polynitrogen backbones have been obtained by X-ray diffraction. Their reactivity by regioselective activation and by oxidation has been studied to access cyclic polynitrogen structures
Fleurentdidier, Thomas. "Étude théorique du mécanisme de la réaction d’Ing-Manske : Application à la synthèse stéréosélective du pyrazépate de méthyle." Université Louis Pasteur (Strasbourg) (1971-2008), 2007. https://publication-theses.unistra.fr/public/theses_doctorat/2007/FLEURENTDIDIER_Thomas_2007.pdf.
Full textThe Ing-Manske reaction is a well-known variant of the Gabriel synthesis reaction which is used to synthetize primary amines under mild conditions. Yet, its mechanism has never been theoretically studied. Only few intermediates have been experimentally isolated or characterised. Its use with methyl pyrazepate showed an unexpected diastereoselective behavior that we have tried to clarify. The mechanism has been studied at the DFT-B3LYP level. Transition states and reaction intermediates have been calculated for various possible reaction pathways. Solvation effects, either microsolvatation or bulk effects (via PCM method), have been taken into account. On this basis some rationalization for the observed diastereoselectivity is proposed
Pinto, Maria-Fatima. "Nouvelles voies de synthèse d'hydrazines fonctionnalisées : application à la préparation d'isoniazide monomarqué à l'azote 15 et d'alpha-hydrazinoesters chiraux." Nancy 1, 2002. http://www.theses.fr/2002NAN10189.
Full textThis work aims at developing a new efficient synthetic route to N-functionalised hydrazine derivatives using N-aminophtalimide, N-acyl and N-alkyloxycarbonylaminophtalimides. The first part describes the synthesis of regioselective singly-labeled nitrogen 15 hydrazide, starting from N-aminophtalimide (15N). The direct application of this first study is the synthesis of two isotopic isomers of isoniazid (a front-line antituberculosis drug), which elucidate the activation of isoniazid by catalase-peroxydase from Mycobacterium tuberculosis. Moreover the reactivity of N-acyl and N-alkyloxycarbonylaminophtalimides which can be considered as hydrazines bearing three electron-withdrawing groups including two incorporated into the phtaloyl moiety, is developed in a second part. These compounds were used in phase transfert catalysis conditions and as acidic partners in the Mitsunobu reaction for the preparation of monoalkylhydrazines, monoalkylhydrazides and alkylcarbazates. In the third part , this current method was extented to include the preparation of protected chiral hydrazinoacid derivatives via the Mistunobu protocol. Finally the conformationel study and reactivity of N-aminophtalimide and its derivatives is reported
Peyrot, Laurent. "Nouvelle avancée dans le procédé Raschig : élaboration de chloramine haute teneur, extension à la synthèse d'une hydrazine à structure indolique : la N-amino-2-méthylindoline." Lyon 1, 1998. http://www.theses.fr/1998LYO10006.
Full textGonce, Frédéric. "Phosphorylation d'hydrazines. Applications à la synthèse de systèmes insaturés acycliques et macrocycliques." Toulouse 3, 1991. http://www.theses.fr/1991TOU30196.
Full textLe, Duc Minh. "Nouvelle stratégie d’élaboration de la monométhylhydrazine via le procédé Raschig en utilisant la technologie des microréacteurs : synthèse de la chloramine dans des conditions quasi-stoechiométriques et isolement en une seule étape multifonctionnelle." Thesis, Lyon 1, 2012. http://www.theses.fr/2012LYO10335.
Full textThis work, conducted as part of a collaboration with the Safran-Heraklès group, aims at developing a new synthesis concept for the monomethylhydrazine (MMH), by process intensification using microreactor technology. The work was funded by the Rhône-Alpes region in the form of a doctoral fellowship TARGET 2008-2011. The first part of this research aims to study the stability of monochloramine solutions prepared in stoichiometric conditions. This synthesis was carried out continuously, for the first time ever, using microreactor technology. Optimal synthesis conditions as well as a set of security parameters have been established for a fast and secured transfer to industrial scale. The second part, also one of the main objectives of this work, is the extraction, under pressure, of all organic products (mostly MMH and monomethylamine) in the form of one condensed phase by demixing the crude reaction liquors. This phenomenon is related to the existence of a miscibility gap in the liquid ternary system H2O-MMA-NaOH. The optimization of the demixing step requires then the study of different solid-liquid-liquid phase diagrams involved. The last part deals with the chemical engineering aspect of the research. A kinetic modeling of the synthesis of MMH by the Raschig way was used in order to estimate the composition of the synthesis solution. These results and the application of phase diagrams allow the determination of optimal conditions for the isolation step and the establishment of process flow-sheets for the synthesis of MMH
El, Khatib Mazen. "Mécanisme et modélisation des réactions intervenant au cours de la synthèse d'une hydrazine d'intérêt pharmaceutique : le N-amino3-aza bicyclo [3,3,0]octane." Lyon 1, 1994. http://www.theses.fr/1994LYO18994.
Full textGoutelle, Véronique. "Synthèse de la 2-hydroxyéthylhydrazine par voie chloramine et par alkylation de l'(hydrate d'hydrazine) : mécanistique, modélisation cinétique et optimisation." Lyon 1, 2006. http://www.theses.fr/2006LYO10273.
Full textThis work was carried out with ISOCHEM (SNPE company). It presents various access roads to the synthesis of hydroxyethylhydrazine. This molecule arouses today a great interest taking into account its applications in the field aerospace, Defense, pharmaceutical and cosmetics industry. - The 1st part is devoted to the Raschig way. A kinetic and mechanistic study of the reactions of formation and degradation made it possible to identify the products and to establish a model. The optimum conditions for synthesis were defined as well as an approach of the operations of extraction. - The 2nd part relates to the alkylation of hydrazine hydrate by chloroethanol with and without the presence of a strong base. The rates laws of the mono and dialkylation relating to each option were given. This work was supplemented by a calorimetric study of the enthalpy of solvation and reaction. A total modeling makes it possible to control the whole of the reactional entities (ethylene oxide…)
Bataille, Patricia. "Synthèse asymétrique d'alpha-phénylalcanamines au moyen d'hydrazines N,N-disubstituées dérivant du (R)-(-)-2aminobutan-1-ol." Le Mans, 1999. http://www.theses.fr/1999LEMA1003.
Full textSchneider, Yoann. "Utilisation des diazirines comme source d'azote électrophile pour la synthèse d'hydrazines et d'hétérocycles." Thèse, Université de Sherbrooke, 2016. http://hdl.handle.net/11143/8736.
Full textPerez, Luna Alejandro. "Synthèse asymétrique d'amines cycliques polyfonctionnelles chirales non racémiques par désymétrisation d'hydrazines bicycliques meso." Paris 5, 2003. http://www.theses.fr/2003PA05P622.
Full textThe enantioselective preparation of a variety of potential biologically active nitrogen containing compounds can be achieved via catalytic desymmetrization of meso 2,3-diazabicyclo[2. 2. 1]hept-5-enes. Catalytic asymmetric hydroboration with rhodium or iridium complexes gives hydrazinoalcohols that lead to 1,3-diaminocyclopentanic cores. On their side, electrophilic additions are followed by a rearrangement that generates non symmetrical species. Desymmetrization of 2,3-diazabicyclo[2. 2. 1]hept-5-enes can also result from fragmentation reactions. The cis-1-aminocyclopent-2-ol-3-ene core can be obtained stereoselectively via an acido catalysed rearrangement. Palladium-catalyzed enantioselective allylic substitutions with oxygen, nitrogen or carbon nucleophiles give cis- 4 substituted aminocyclopent-2-enes. The enantioselectivity is independent of the nucleophile used
Vieira, Ricardo. "Synthèse et utilisation de nouveaux catalyseurs nanostructurés de décomposition de l'hydrazine pour des applications spaciales." Strasbourg 1, 2003. http://www.theses.fr/2003STR13093.
Full textDuring its lifespan, a satellite may undergo a variety of exterior influences that can eventually deviate it from its original orbit. As a result, it is necessary periodically to effectuate small corrections in the orbit of the satellite in order to maintain it on its desired course. This is done with the help of low-powered microthrust engines. Most satellites presently in use function using hydrazine catalytic decomposition microthrust engines with 30 to 40 wt. % iridium catalyst supported by stabilised alumina. We have developed by chemical vapordeposition a new material carbon nanofiber (CNF) base as an alternative to the traditional support. The procedure for this synthesis consists in growing CNF on a macroscopic support of a predefined nature (felt, foam, tissue, etc. ) and to form it by catalytic decomposition of ethane on nickel particles dispersed upon the surface of the support. We have chosen graphite as our precursor material, partly as a result of its elevated thermal conductivity and partly as a result of its total absence of porosity. This absence of porosity facilitates the access of reactive substances and at the same time does not impede the growth of the nanofibers. The NFC based composite was impregnated with 30 wt. % of iridium and submitted to a variety of thermal treatments. The overall performance of these catalysts has been evaluated in the hydrazine catalytic decomposition reaction, first in a micro-pilot plant under laboratory conditions, then in a 2 N microthruster under real-life conditions. The results obtained were compared with those of a commercial catalyst. The CNF based catalysts showed for better performance than the commercial catalyst from a standpoint of activity as from a standpoint of stability. In conclusion, we have demonstrated that this support is highly efficient in reaction needing fast mass and heat transfer due to its texture and it's thermal conductivity
Betton, Clélia. "Nouvelle stratégie d'extraction et de purification de l'hydrazine N2H4 de grade spatial via le procédé Raschig : synthèse, modélisations cinétiques, équilibres entre phases et schémas de procédé." Thesis, Lyon 1, 2014. http://www.theses.fr/2014LYO10366/document.
Full textThis work, funded by the CIBLE-Rhône-Alpes Region, in partnership with the HERAKLES-SAFRAN group, aims to develop a new method for extracting and purifying hydrazine N2H4, for space applications. This monopropellant must be of very high purity, with an upper mass composition of 99.5% hydrazine and a carbon content of less than 30 ppm.The first part of this study allowed us to identify the reactions of formation and degradation to establish a global kinetic model and determine the guiding parameters of synthesis. Knowledge of the compositions of reaction liquors function of operating conditions of the synthesis, has allowed us to position, on leaving the reactor, the overall mixing point in the diagrams of ternary and quaternary phases in order to define the optimum extraction conditions.The second part concerns the detailed thermodynamic study of the new method of extraction, which is, not to extract excess ammonia from the reaction mixture but maintain the in situ to extract the hydrazine in the liquid phase separation -liquid by solvent effect. The aim ultimately is to get a virtually anhydrous ammonia phase so as to eliminate multiple distillations and complex extraction and purification encountered in the traditional process. This new strategy is based on the existence of a miscibility gap in the liquid state, in the H2O-NH3-H2O-NaOH ternary system and N2H4-NH3-NaOH quaternary system at a pressure of between 15 and 20 bar.The last part deals with the process engineering component. The operation of kinetic model and phase diagrams involved allowed us to determine the optimum conditions of synthesis and isolation, to calculate the composition of the material flow at the end of each unit operation and compare them with previous industrial processes . The process diagrams for each option have been prepared and analyzed at cost, safety and specifications obtained useful product
Fogain-Ninkam, Alain. "Synthèse de structures hétérocycliques incluant un motif isoindole par cyclisation intramoléculaire." Le Havre, 2000. http://www.theses.fr/2000LEHA0007.
Full textBenamour, Khalid. "Produits dérivés de la 2-iminoimidazolidine : synthèse, structure et résultats pharmacologiques." Université Joseph Fourier (Grenoble), 1993. http://www.theses.fr/1993GRE18013.
Full textFrangieh, Marie-Rose. "Thermodynamique des équilibres entre phases appliquée à la définition des conditions d’extraction et de purification de la N-aminopyrrolidine." Thesis, Lyon 1, 2011. http://www.theses.fr/2011LYO10016/document.
Full textThis global work is related to the synthesis, extraction and purification of a new exocyclic hydrazine with cosmetic applications, the N-aminopyrrolidine (NAPY). Firstable, the optimization of the synthesis conditions by the Raschig way are carried out by studying the influence of two parameters, the reagents’ molar ratio and the temperature, on the yield of the reaction. Due to the very low hydrazine content in the reaction liquors (≈5%w of NAPY), the extraction and purification of the useful product are often linked to successive demixing and distillation operations. The determination of these separation conditions requires then the knowledge of thermodynamics’ properties of the phase equilibria in these unitary steps. The optimization of the demixing needs then the study of the solid-liquid-liquid ternary solution NaOH/Pyrrolidine/Water. In this aim, three isothermal isobaric sections were studied, by combination of ATI (Isoplethic Thermal Analysis) and chemical analysis. The diameter and modulus method was developed in order to determine the composition of the critical point of the demixing curve. The distillation steps involve the liquid-vapor ternary system NAPY/Pyrrolidine/Water. The limit binary system Water/Pyrrolidine was determined by ebulliometry under atmospheric pressure. For a better understanding of the heteromolecular interactions in the liquid phase, two others liquid-vapor binary systems Water/Amine were obtained. The study of the ternary liquid-vapor system lad us to deduce two various distillation schemes. Once the synthesis and extraction conditions defined, a global process scheme was proposed, and NAPY was obtained in conformity with the cosmetical specifications
Waibel, Michael. "Design and Synthesis of Molecules to Probe Peptidase Activity." Lyon, École normale supérieure (sciences), 2008. http://www.theses.fr/2008ENSL0503.
Full textThe first part of this Ph. D thesis describes the development of several HIV-1 peptidase inhibitors having a hydrazino-urea core. We have developed an efficient, convergent synthetic route to enantiopure compounds generated from two independent building blocks, one derived from amino acids, the other one from easily accessible hydrazines. All compounds were tested with HIV-1 peptidase in a FRET based enzyme assay. In a second part, we have developed a fluorogenic probe for the detection of peptidolyic activity. In this molecule, the fluorophore 2-(2'-hydroxyphenyl)-4(3h)-quinazolinone (HPQ) is coupled via a self-immolative spacer to an amide function that can be cleaved by an enzyme. We could demonstrate that the amide group is cleaved by commercial leucyl aminopeptidase which leads to rapid fragmentation of the spacer unit resulting in the generation of an intensly fluorescent signal
Frangieh, Marie-Rose. "Thermodynamique des équilibres entre phases appliquée à la définition des conditions d'extraction et de purification de la N-aminopyrrolidine." Phd thesis, Université Claude Bernard - Lyon I, 2011. http://tel.archives-ouvertes.fr/tel-00858111.
Full textForquet, Valérian. "Composés polyazotés dérivés d’hydrazines : synthèse, caractérisation et modélisation quantique des performances énergétiques." Thesis, Lyon 1, 2012. http://www.theses.fr/2012LYO10328/document.
Full textHigh nitrogen content energetic compounds, envisioned as a first step towards High EnergyDensity Materials (HEDM) for space propulsion, were prepared from hydrazine derivatives. Indeed,the formation of nitrogen gas (N−−−N) from an N−−N bond yields a lot of energy and even morefrom an N−N bond. Hence, an amination reaction on unsymmetrical dimethylhydrazine (UDMH)yielded a 2,2-dimethyltriazanium salt, containing three consecutive single-bonded nitrogen atoms.The initial inorganic anion was then exchanged with the following nitrogen-rich anions in order toyield energetic salts: 5-aminotetrazolate, 5-nitrotetrazolate, 5,5’-azobistetrazolate, azide, nitroformateand dinitramide. For safety reasons, the ion metathesis of the azide salt was conductedby electrodialysis and the sensitivities of all compounds towards both impact and friction wereevaluated in accordance with standard procedures. Reliable heats of formation of the compoundswith the highest nitrogen content were obtained by oxygen bomb calorimetry. These values werethen computed with quantum mechanical methods and compared with known procedures reportedin the literature, whose theoretical backgrounds have been discussed. Consequently, theprocedure resulting in the best match between calculated and experimental heats of formation wasidentified. The precision of the method used herein exceeds that of recent results from renownedresearch groups in this field. Thus, the various techniques introduced during the course of thiswork will enable our laboratory to progress more efficiently in this area of research
Sortais, Benoît. "Nouvelles synthèses radicalaires d'indanes, de dérivés d'hydrazines et d'hydroxylamines : Nouvel accès aux alcaloi͏̈des de l'ergoline et synthèse radicalaire de la mélatonine." Palaiseau, Ecole polytechnique, 2002. http://www.theses.fr/2002EPXX0005.
Full textLaniel, Dominique. "Synthèse de polymères d'azote par pression comme matériaux énergétiques du futur." Electronic Thesis or Diss., Sorbonne université, 2018. http://www.theses.fr/2018SORUS472.
Full textThe goal of this thesis is to synthesize novel polynitrogen compounds by pressure as the next-generation high energy density materials (HEDM). To achieve this, the physico-chemical properties of pure nitrogen as well as the xenon-nitrogen, hydrogen-nitrogen and lithium-nitrogen mixtures were studied under extreme pressure and temperature conditions. In the case of the compression of pure nitrogen, a novel polymeric nitrogen solid composed of interconnected chains of N6 rings was produced at 250 GPa and 3300 K. The low pressure Xe-N2 investigation revealed the formation of a stoichiometric Xe(N2)2 van der Waals compound. Above 150 GPa and 2500 K a xenon-polynitrogen material was observed. The N2-H2 study, focusing on the characterization and high-density behavior of the N2(H2)2 van der Waals compound, uncovered its pressure-induced chemical reaction near 50 GPa into azanes (NxHx+2), with ammonia (NH3) as the main constituent. Intriguingly, decompression of the reacted sample resulted, below 10 GPa, in the transformation of ammonia into its thermodynamically less stable counterpart hydrazine (N2H4). Lastly, the Li-N2 system proved to be of great interest due to the large array of anionic nitrogen moieties discovered (N3-, [N2]~2 [N2]~1 and N5-). In particular, lithium pentazolate (LiN5), containing the elusive energetically-rich pentazolate anion, was synthesized above 45 GPa and 2500 K. Moreover, it could be retained down to ambient conditions. It is the first polynitrogen HEDM produced by high pressure and retrieved down to ambient conditions. These results demonstrate the potential of high pressure for the synthesis of industrially relevant HEDM
ZIMMERMANN, DIANE. "Modulation de la synapse glutamatergique : conception et synthese d'analogues de molecules neuroactives ; applications cardio-vasculaires (doctorat : pharmacochimie)." Strasbourg 1, 1999. http://www.theses.fr/1999STR15008.
Full textKirchhoff, Jan Hendrik. "Totalsynthese von (+)-2-epi-Deoxoprosopinin und neue Hydrazin-Harze für die organische Festphasensynthese." [S.l.] : [s.n.], 2001. http://deposit.ddb.de/cgi-bin/dokserv?idn=96284697X.
Full textRonsseray, Caroline. "Des isonitriles aux hydrazones : Réactions multicomposants et Synthèses d'hétérocycles." Phd thesis, Ecole Polytechnique X, 2011. http://pastel.archives-ouvertes.fr/pastel-00664985.
Full textRonsseray, Caroline. "Des isonitriles aux hydrazones : Réactions multicomposants et Synthèses d'hétérocycle." Phd thesis, Palaiseau, Ecole polytechnique, 2011. https://pastel.hal.science/docs/00/66/49/85/PDF/Final2M.pdf.
Full textMulticomponent reactions (MCR), as one-pot reactions, are effictient to synthesis target compounds with at least 3-starting materials. This methodology is very useful, in particular for heterocycle synthesis. Isocyanides, due to their specific reactivity, are favorite starting materials for these reactions. In first hand, a new oxazole-synthesis was discovered. Two reactions are in competition, that is why this study further stress the influence of the base on the chemoselectivity of the process. In second hand, research have been made on hydrazones. A new 3-components synthesis was discovered. This reaction coupled with a Fischer synthesis is an efficient way to obtain indole compounds. Moreover, these hydrazones allow us to discover a new reaction of cyclisation/oxidation to form pyrazolidinones. This new reaction applied to product prepared thanks to the Ugi coupling, become a new post-condensation reaction for these compounds
Ollivier, Anthony Gabriel André. "Synthèse asymétrique de spiroacétals : vers la broussonétine H." Thesis, Clermont-Ferrand 2, 2011. http://www.theses.fr/2011CLF22109/document.
Full textSpiroketal pattern appears in the skeleton of many natural products exhibiting various biological activities, and several synthetic routes to it have been reporting. Contrarily, spiroaminal moiety, its nitrogen analogue, has been less studied. The first of our objectives consisted to develop the most general enantioselective synthetic pathway to this framework. The adopted strategy is based on a key step acid-catalysed spirocyclisation of aminohydroxyketones, resulting from the sequential alkylation of acetone N,N-dimethylhydrazone by various iodide derivatives. If targeted spiroaminals could not be obtained, these polyfunctionalized ketones permit an efficient access to original spiroketals skeletons like 1,6-dioxaspiro [4.6] undecanes and 1,7-dioxaspiro [5.6] dodecanes. In a second part, we focused on the total synthesis of broussonetine H, a natural spiroketal possessing powerful inhibitory activities against β-glycosidases. Its elaboration was envisaged through the coupling between two key fragments : the 2-ethynyl-1,7-dioxaspiro [5.5] undecane and an iminocyclitol substitued by an epoxide. The synthesis of these two compounds was realized in few steps with good overall yelds.Their coupling led to a protected form of broussonetine H. The final deprotection step remains to be optimized to allow the final isolation of the natural product
Huet, Laurent. "Réactions radicalaires multicomposant appliquées à la synthèse de lactones et pipéridinones fonctionnalisées." Thesis, Bordeaux 1, 2011. http://www.theses.fr/2011BOR14262/document.
Full textThe construction of piperidinone and lactone scaffolds has been performed efficiently, combining radical and ionic processes. The synthesis of SEM-protected oximes by a multicomponent radical reaction enables, after hydrolysis of the oxime functional group, the access to a functionalized aldehyde. This compound is then converted into a lactone or a piperidinone by a ionic process.An approach minimizing the number of steps has been developed, thus allowing a rapid and convenient access to a large diversity of structures. These processes may involve up to five components
Desvergnes, Valérie. "Addition 1,2 du méthoxyallène lithié sur les hydrazones : aspects synthétique et mécanistique." Lyon 1, 1999. http://www.theses.fr/1999LYO10320.
Full textJudele, Roxana Daniela. "Synthese und Eigenschaften von langkettig substituierten Azamakrozyklen-Metall-Komplexen und Hydrazidestern." Göttingen Sierke, 2007. http://d-nb.info/986056391/04.
Full textMoussodia, Ralph-Olivier. "Synthèse et études conformationnelles de 1:1-[alpha-alpha-Nalpha-Bn-hydrazino]mères linéaires et cycliques." Thesis, Université de Lorraine, 2012. http://www.theses.fr/2012LORR0230/document.
Full textThis work describes the synthesis and the structural study of linear and cyclic 1:1-[alpha/alpha-Nalpha-Bn-hydrazino]mers. After having designed a general method to synthesize alpha-Nalpha-hydrazinoesters with various surrogates on the alpha nitrogen in solution, these were used to build linear and cyclic 1:1-[alpha/alpha-Nalpha-Bn-hydrazino]mers of varied length. Conformational studies resorting to NMR, IR and X-ray crystallography have shown that the presence of a supplementary nitrogen within the backbone enables to form intramolecular hydrogen bonds, leading to the formation of hydrazinoturns. Thus, the alternation of natural alpha-aminoacids and alpha-hydrazinoacids leads to the autostructuration of the linear oligomers through the formation of y-turns and hydrazinoturns, both in the hetero and homochiral series. In the cyclic series, an X-ray crystallography analysis revealed the formation of nanotubes in the solid state, through the stacking of heterochiral cyclotetramers. This conformation exists in toluene and dodecane and leads to the formation of a gel. Despite having no proof of its structure in the solid state, the gel formed by the heterochiral cyclohexamer in cyclohexane confirms a comparable auto-structuration. Finally, concentration- and temperature-dependant NMR and IR studies have revealed the dynamics of the formation of nanotubes. The study of the homochiral cyclotetramer has however shown that it was not able to form a gel. As the gel is indicative of an auto-structuration, this has led us to question the versatility of the macrocyclic 1:1-[alpha/alpha-Nalpha-Bn-hydrazino] backbone towards the formation of nanotubes
Tursun, Ahmatjan. "Synthèse asymétrique de spirohétérocycles : un accés modulaire à des spiroacétals, une approche originale des spiroaminoacétals." Phd thesis, Université Blaise Pascal - Clermont-Ferrand II, 2006. http://tel.archives-ouvertes.fr/tel-00688834.
Full textLebreton, Jacques. "Synthèse totale des C-Nor D-homostéroïdes." Paris 11, 1986. http://www.theses.fr/1986PA112193.
Full textThe first part of this thesis describes various model reactions pertaining to the total synthesis of C-nor D-homosteroids. Various methods for the synthesis of α-acetonyl ketones were tested and compared with each other. The most general and efficient method appeared to be the alkylation, with methallyl chloride, of the carbanion derived from a N,N dimethylhydrazone, followed by ozonolysis of both double bonds. The second part of this work describes an efficient and stereo selective total synthesis of C-nor D-homosteroid compounds, following a general pathway of the A→B→ C→D type. The A-B ring system was provided by the Wieland-Miescher ketone. The ring C was formed by intramolecutar cyclisation of an appropriate γ-diketone. Construction of the ring C was achieved by means of a Birch reductive alkylation, followed by intramolecular cyclisation of the intermediate δ-diketone thus formed. C-nor D-homosteroids having six asymmetric carbons as well as the required "natural" trans-anti-trans configuration were thus obtained in eleven steps from the Wieland-Miescher ketone. This probably represents one of the simplest and most efficient routes leading to C-nor D-homosteroids
Dumoulin, David. "Variations méthodologiques autour des samp-hydrazones chirales : applications et développements." Thesis, Lille 1, 2009. http://www.theses.fr/2009LIL10072/document.
Full textThe work reported in this manuscript was initially concerned with the development of a conceptually new asymmetric approach to a variety of 2-benzazepines differentially substituted at C-3, C-4 and C-5. The control of the stereogenic centres was ensured by the use of a-alkylation and/or nucleophilic 1,2-addition reactions on SAMP-hydrazones, or by 1,4-addition processes on structurally related a,ß-unsaturated esters. We also embarked on a synthetic approach liable to ensure the stereochemistry at C-1. For this purpose, we have developed a new general asymmetric synthesis of 1-alkyl-2-benzazepin(on)es, which is based upon the combination of the highly diastereoselective nucleophilic 1,2-addition on chiral SAMP-hydrazones with a ring-closing metathesis. Viability of our method was ensured by the assembling of poly and diversely substituted models, and by varying the length of the alkyl chain at C-1 on the azepine ring system.Finally, in order to extend the feasibility of the methodology developed in the second chapter, we have disclosed the first asymmetric total synthesis of an phenanthroquinolizidin alkaloid recently extracted from vegetal sources and endowed with established pharmacological properties: Boehmeriasin A
Ollivier, Anthony. "Synthèse asymétrique de spiroacétals : vers la broussonétine H." Phd thesis, Université Blaise Pascal - Clermont-Ferrand II, 2011. http://tel.archives-ouvertes.fr/tel-00653357.
Full textEl, Hajj Ahmad. "Nouveaux concepts d’élaboration de la pyrazolidine par la méthode Raschig et par voie indirecte, en transitant par la 1 et 2-pyrazoline, suivie d’une hydrogénation catalytique : synthèses et modélisations cinétiques, équilibres entre phases et schémas de procédés." Thesis, Lyon 1, 2011. http://www.theses.fr/2011LYO10354.
Full textThis work, conducted as part of a research agreement with the Company ISOCHEM, aims to develop a new synthesis of pyrazolidine by the raschig method and by indirect way via 1 and 2-pyrazoline followed by catalytic hydrogenation. This hydrazine is very important, because of its many applications in the pharmaceutical and cosmetic industries. This thesis was funded by the National Center for Scientific Research as part of a doctoral fellowship engineer / PED. The first part is devoted to the study of the direct Raschig process resulting from the action of sodium hypochlorite in an excess of amine. The definition of the process involved the determination of the kinetic and reaction mechanisms to determine yields, residence time and to simulate numerically the overall operations of synthesis. The extraction conditions were established by exploiting the peculiarities of the phase equilibria in order to developed the flow-sheet. The second part relates to the indirect way. It is based on the synthesis of the 1 pyrazoline by double dehydrohalogenation of N,N-dichloro-1,3-diaminopropane. The pyrazolidine is then obtained by catalytic hydrogenation of the azo group. A global model for developing the pyrazolidine was established which allowed us to determine the optimum conditions and to identify segments syntheses and extractions as well as various unit operations of the process and the mass and energy balances
Breuer, Irene. "Asymmetrische Synthese von Sordidin, 7-epi-Sordidin und von Polyoleinheiten mit quartären Stereozentren." Aachen : Mainz, 2005. http://deposit.d-nb.de/cgi-bin/dokserv?idn=976668076.
Full textOstache, Nicu-Carmin. "Synthèse et fonctionnalisation de bicycles 5-5 polyazotés : pyrazolo[3,4-d]thiazoles et pyrazolo[3,4-c]pyrazoles." Thesis, Orléans, 2019. http://intranet.univ-orleans.fr/bibliotheques/theses/nicu-cosmin-ostache_3378_vm.pdf/.
Full textNitrogen-rich fused bicyclic structures are undisputedly one of the most used scaffolds for therapeutic use.The 5:5 polynitrogenated bicycles are moieties considerably less documented then their 6:6 or 6:5analogues. Despite the pharmacological potential of the pyrazolo[3,4-d]thiazoles and of thepyrazolo[3,4-c]pyrazoles, two examples of such rare families, only few methods of preparation and directfunctionalization of these heterocyclic moieties have been described.In this context, the main goal of our research aims at exploring new routes towards these bicyclic systemsfrom readily available and affordable starting materials. Efficient strategies were developed relying onhydrazine condensations, on intramolecular N-cyclizations, on chemo-selective halogenation and variouscross-coupling reactions. Moreover, the pyrazolo[3,4-d]thiazole entity was fused to a triazapentalenestructure in order to assess the spectroscopic properties
Bouget, Karine. "Synthèse et évaluation d'hydrazino aza et N-azapeptoi͏̈des, analogues de peptides aldéhydes inhibiteurs d'enzymes impliquées dans le déroulement du cycle cellulaire." Rennes 1, 2001. http://www.theses.fr/2001REN10109.
Full textPasco, 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.
Full textIn 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
Marten, Jan. "Synthese, strukturelle Charakterisierung und theoretische Betrachtungen von Arylhydrazonen des Pentan-2,4-dion-Typs." Doctoral thesis, Technische Universitaet Bergakademie Freiberg Universitaetsbibliothek "Georgius Agricola", 2009. http://nbn-resolving.de/urn:nbn:de:bsz:105-7158940.
Full textSchiltz, Stéphanie. "Approche de synthèse du tricycle ABC du taxol." Phd thesis, Ecole Polytechnique X, 2005. http://pastel.archives-ouvertes.fr/pastel-00001803.
Full textBischoff, Laurent. "Amination electrophile nouveaux reactifs d'amination electrophile. Preparation d'alpha-hydrazino-beta-hydroxyesters. Application a la synthese de molecules d'interet biologique." Paris 6, 1994. http://www.theses.fr/1994PA066495.
Full textHazelard, Damien. "Synthèse stéréosélective d'acides aminocyclobutanecarboxyliques : préparation de dérivés de la sérine et de l'ornithine." Paris 11, 2005. http://www.theses.fr/2005PA112301.
Full textThis work deals with the stereoselective synthesis of alpha-aminocyclobutanecarboxylic acids in particular two cyclobutanic derivatives of natural amino acids: ornithine and serine. These aminoacids could potentially have biological properties. In the new pathway the key-step is based on a stereoselective one-pot asymmetric Strecker-reaction from 2-substituted cyclobutanones. In the first part, we report two new synthetic methods of optically active 2-substituted cyclobutanones. The first one is based on enzymatic transesterification of 2-hydroxyclobutanone or derivatives to give corresponding enantiopure alcohol and acetate with good yields and excellent enantiomeric excesses. Both compounds are transformed in few steps into both enantiomers of 2-benzyloxycyclobutanone. The second method describes an asymmetric alkylation of chiral imines or hydrazones prepared from cyclobutanones. Thus optically active 2-alkyl-cyclobutanones, some of them are detected in irradiated foodstuffs, are obtained with good yields and good enantiomeric excesses. In the second part, we describe the synthesis of cyclobutanic amino acid analogues of serine and ornithine. The key-step is an asymmetric Strecker reaction from chiral or racemic cyclobutanones, in which the diastereoselectivity under various conditions is specified and absolute configurations of amino nitriles are determined by X-ray crystallographic analysis. These amino nitriles give for the first time in 3 steps serine and ornithine derivatives. In this part we also report a one-pot asymmetric alkylation-Strecker reaction to obtain optically active beta-alkylated amino nitriles, which are potentially precursors of aminoacids
Mwande-Maguene, Gabin. "Conception, synthèse et activité antiplasmodiale de nouveaux composés ferrocéniques." Thesis, Lille 1, 2011. http://www.theses.fr/2011LIL10055/document.
Full textPharmacomodulation of biologically active drugs by the introduction of an organometallic entity such as ferrocene constitutes a very interesting alternative to compensate the problematic increase of antimalarial drug resistances. This PhD work is focused on the design, the synthesis and the study of antiplasmodial activity of new ferrocenyl compounds. For this purpose, four families of drugs containing a ferrocenyl entity were synthesized and studied for the first time. Thus, several aminohydroxynaphthoquinones (Atovaquone analog), quinolinyl- and acridinylhydrazones, 4-aminoquinolines (Chloroquine analog) and benzodiazepines (Flurazepam analog) were designed and obtained in good conditions. The ferrocenyl derivatives were evaluated for their antimalarial activity in vitro upon Plasmodium falciparum strains and gabonese clinical isolates. Some of these synthesized compounds have displayed very promising results, in particular for the ferrocenyl 4-aminoquinolines derivatives. The cytotoxic activity and the selectivity index of these compounds have indicated some of them as promising candidates for further development
Dauge, Delphine. "Cyclisations radicalaires 5-endo-trig et Synthèses d'agents anti-cancéreux." Phd thesis, Ecole Polytechnique X, 2005. http://pastel.archives-ouvertes.fr/pastel-00002296.
Full textChauveau, Ariane. "Synthèse stéréosélective de composés diazotés par cycloadditions 1,3-dipolaires et réactions apparentées." Paris 5, 2003. http://www.theses.fr/2003PA05P632.
Full textThe general aim of our present work was the elaboration of highly functionnalized, chiral diazacompounds, from an optically pure R-(-)-phenylglycinol derivative. In the first part, different chiral, non-racemic azomethine-imine ylids underwent 1,3-dipolar cycloaddition with olefines, leading to a new family of polysubstituted [6,5] bicyclic hydrazines, with good yields and high stereoselectivities. Some of the bicyclic compounds were then transformed into pyrazolidines and 1,3-diamines, without epimerization. Finally, chiral azomethine-imine ylides reacted with b-cetoesters under Lewis-acid catalysis, giving access to monoinsaturated [6,5] bicycles with excellent stereoselectivities. The mechanism appeared to be closer to the Biginelli reaction than to 1,3-dipolar cycloadditions