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Artykuły w czasopismach na temat "Produits de la mer – Synthèse (chimie)"
Harmel, J., R. Tan, Ch Capello, Ch Rouabhi, F. Gessinn, J. Schauber, J.-B. Lincelles i M. Respaud. "Les principes de la chimie verte pour une électronique plus durable : une nouvelle approche de la synthèse chimique de nanoparticules d’oxyde de tungstène WO3 intégrées dans un capteur de gaz". J3eA 23 (2024): 1010. http://dx.doi.org/10.1051/j3ea/20241010.
Pełny tekst źródłaHauet, Jean-Pierre. "Captage, stockage et valorisation du CO 2 : un nouveau départ". Futuribles N° 455, nr 4 (16.06.2023): 27–31. http://dx.doi.org/10.3917/futur.455.0027.
Pełny tekst źródłaMaujean, Alain. "The chemistry of sulphur in musts and wines". OENO One 35, nr 4 (31.12.2001): 171. http://dx.doi.org/10.20870/oeno-one.2001.35.4.1698.
Pełny tekst źródłaCOULMIN, J., C. TONDELIER, G. LEROY, N. RAMPNOUX, V. INGRAND, N. TALAZAC, S. LEFEBVRE, F. FUCHS i S. LUNA. "Une stratégie de prélèvements et d’analyses innovante pour caractériser le devenir des micropolluants dans le milieu naturel". Techniques Sciences Méthodes 6, nr 6 (21.06.2021): 73–86. http://dx.doi.org/10.36904/tsm/202106073.
Pełny tekst źródłaAgbodan, Kokou Agbékonyi, Oudjaniyobi Simalou, Gneiny Whad Tchani i Koffi Jondo. "Etude de l’influence de la basicité sur l’enthalpie de réaction des sels N-méthoxycarbonyl-(oxy)-pyridiniums". International Journal of Biological and Chemical Sciences 14, nr 4 (17.08.2020): 1489–98. http://dx.doi.org/10.4314/ijbcs.v14i4.26.
Pełny tekst źródłaBavant, Bernard. "Fragments de casques de type Baldenheim trouvés à Caricin Grad". Mélanges de l École française de Rome Moyen Âge 120, nr 2 (2008): 327–53. http://dx.doi.org/10.3406/mefr.2008.9502.
Pełny tekst źródłaAmel ZITOUNI, Nabila BELYAGOUBI-BENHAMMOU, Asma El ZEREY-BELASKRI, Fethi TOUL, Nassira GHEMBAZA i Fawzia ATIK-BEKKARA. "Polyphenolic Profile and Comparative Study on Phytochemicals and Antioxidant Activity of Extracts From all Parts of Gymnocarpos decander Forsk." Journal of Natural Product Research and Applications 1, nr 02 (3.12.2021): 31–44. http://dx.doi.org/10.46325/jnpra.v1i02.13.
Pełny tekst źródłaRozprawy doktorskie na temat "Produits de la mer – Synthèse (chimie)"
Frère, Stéphane Frédéric. "Synthèse d'hétérocycles azotés et soufrés à potentiel anticancéreux". La Rochelle, 2003. http://www.theses.fr/2003LAROS100.
Pełny tekst źródłaNew potential antitumor arylthiazoles have been prepared via 4,5-dichloro-1,2,3-dithiazolium chloride chemistry from aromatic amines as starting material. Reaction of cyclisation of iminodithiazole to benzothiazole has been optimised and scalling up under micro-wave irradiation was performed. The synthesis of a natural benzothiazole has been reinvestigated with luciferine derivatives. According several methodologies solvant free, thiazolocoumarins have been isolated. New plan and linear bis-2-cyanobenzothiazoles have been obtained via Appel salt chemistry with bis-amines as starting material and by coupling reaction using Cu or Ni. The synthetic route to and a preliminary biological evaluation of novel indolo[1,2-c]quinazolines and benzimidazo[1,2-c]quinazolines are described. The products were obtained by condensation of the appropriate diamines(e. G. 2-(2-aminophenyl)indole or 2-(2-aminophenyl)benzymidazole) with benzothiazole-2-carbonitriles. Topoisomerase inhibition of thiazolocompounds has been discussed. Moreover, original indirubin and thiazolotetralone derivatives have been prepared and tested against cyclin dependant kinases
Picon, Sylvain. "Réaction de couplage oxydatif de la guanidine avec des oléfines : application à la synthèse d'analogues de métabolites marins". Paris 11, 2008. http://www.theses.fr/2008PA112261.
Pełny tekst źródłaThis scientific project deals in one hand with the application of an oxidative coupling of guanidines with alkenes towards the synthesis of the (+/-) dibromoagelaspongin via a biometic approach. On the other hand this work aims to the synthesis of keramadine’s analogs in order to evaluate their biological activity on 5-HT2c serotoninergic receptors and melatoninergic receptors like MT1 and MT2. According to our biogenetic hypothesis for the formation of the (+/-) dibromoagelaspongin, the formation of two synthetic equivalents of the cyclic oroïdin was achieved using two different pathways. Unfortunately, for each equivalent, the last biomimetic oxidation –cyclisation step underwent to product rearrangements and the (+/-) dibromoagelaspongin cant’t be obtained. Nevertheless, the tetracyclic intermediate could be isolated illustrating the first synthesis of the tetracyclic core of the (+/-) dibromoagelaspongin. By another pathway induced by the two previous, the debromodispacamide B was synthesized by coupling a guanidine with an oxidized equivalent of diketopiperazine pyrrole-proline. This synthesis allowed us to confirm the mechanism of the debromodispacamide B formation from the diketopiperazine pyrrole-proline. In a medicinal chemistry project, we synthesized a new variety of keramadine analogs. In this purpose, we developed a new synthesis of 1,2-dihydropyridins. This approach led us to the major formation of undesired products that exhibited interesting new skeletons. Unfortunately, they didn’t possess a good affinity for the aimed receptors
Montenegro, Paula Ferreira. "Isolement, synthèse et valorisation de substances naturelles marines". Electronic Thesis or Diss., Université Côte d'Azur, 2024. http://www.theses.fr/2024COAZ5038.
Pełny tekst źródłaOceans occupy over 70% of the Earth's surface and represent one of the richest components of the terrestrial biosphere. The various marine organisms found there produce a wide variety of specialized metabolites with biological properties of interest.In this work, we focused on three main tasks: (i) the extraction, fractionation, isolation and structural characterization of specialized metabolites from the Mediterranean sponge Crambe crambe, and a sponge belonging to the order verongida sampled in Djibouti, (ii) the synthesis of metabolites isolated in previous work, peroxyacarnoic acid E, and bolascidins A - D, selected for their biological properties and structural singularities, and (iii) the evaluation of the biological properties of natural and synthetic compounds.The study of a sponge sampled in Djibouti led to the identification of three bromotyrosine derivatives, psammaplin A, psammaplin A1, and bisaprasine. Isolated bromotyrosines, as well as 4-O-sulfatocyclobispsammaplin A, previously isolated from the sponge Hexadella racovitzai, were evaluated for their biological properties, notably as antioxidants. The study performed on the Crambe crambe sponge led to the isolation and characterization of three cyclic guanidine alkaloids, crambescines A1 462, A2 448, and C1 480. These were found to be active against deoxyhypusine synthase (DHPS), a key enzyme involved in the hypusination pathway. Peroxyacarnoic acid E, previously isolated from the sponge Clathria rugosa, exhibited cytotoxicity against several tumor cell lines by activating regulated necrosis pathways, such as necroptosis or ferroptosis. We developed a 13-step convergent synthesis strategy to access this compound in sufficient quantity. The synthesis of the endoperoxide, considered as the key step in the proposed synthetic strategy, was the subject of several attempts. Finally, previous isolation and structural characterization work on the ascidian Polysyncraton sp. led to four new bolaamphiphilic compounds, bolascidins A - D. We designed a 15-step convergent synthesis strategy to access these compounds and their derivatives in sufficient quantities. Several attempts were made to synthesize the central fragment and the polyunsaturated alkyl chain
Beauchard, Anne. "Synthèse de composés hétérocycliques à visée anti-cancéreuse". La Rochelle, 2006. http://www.theses.fr/2006LAROS175.
Pełny tekst źródłaIn an effort to develope new inhibitors of kinases as anticancer agents, we synthetized original indirubins and azaindirubins substituted in position 5, 5’, 6 and 7. Because of the poor water solubility and low bioavailability, monoxime analogs were also prepared. The effect on cyclin dependant kinase, glycogene synthase kinase-3 and on the survival of human neuroblastoma SH-SY5Y cells were estimated. On the other hand, we synthetized thiazoloindolo[3,2-c]quinolin which are closed to natural alcaloid. We reinvestigated the Graebe-Ullmann condensation under micro-wave. A new scaffold 7H-4,5-diaza-benzo[de]anthracen which is structurally closed to dercitin, a marine alkaloid, was identified. The effect on breast cancers cells, potential DNA intercalating and topoisomerase inhibition were also discussed
Corbin, Mathilde. "Formation de liaisons carbone-azote : application à la synthèse de benzazoles et de produits naturels marins bioactifs". Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLS324/document.
Pełny tekst źródłaThis manuscript describes synthetic approaches of benzosceptrin, a pyrrole-2-aminoimidazole (P-2-AI) isolated from a marine sponge, via C-N bond formation and a [2+2] photodimerization. Its synthesis presents the challenges of the benzo-bis-2-aminoimidazole moiety construction and the regio- and stereoselective synthesis of the benzocyclobutanic motif. With this objective, a new methodology of diamination of 2-cyclohexenones by 2-aminopyrimidine and 2-aminopyridines in the presence of the very simple iron/iodine/dioxygen catalytic system has been developed. It was also extended to chalcones and chromone. The application of this method allowed the synthesis of the benzo-bis-2-aminoimidazole moiety of benzosceptrin via the formation of 4 C-N bonds, in 6 steps in an overall yield of 28 % and to explore the reactivity of some intermediates. The second cyclobutanic moiety has been completed thanks to the development of a stereo- and regioselective photodimerization [2+2] of a (E)-3-(imidazo[1,2-a]pyrimidin-2-yl)acrylic acid. Although the total synthesis of benzosceptrin was not achieved, this work allowed the preparation of a chemical library of 50 simplified derivatives for biological evaluations. Those evaluations in kinases inhibition and cytotoxicity helped to highlight an original and interesting cytotoxic product. This research permitted to progress the synthesis of benzosceptrin, to develop a new method of diamination and to create a chemical library of simplified derivatives of a natural product
Juillet, Charlotte. "Conception, synthèse et évaluation pharmacologique d’analogues simplifiés de métabolites marins, inhibiteurs de la kinase Aurora B, à visée anticancéreuse". Thesis, université Paris-Saclay, 2020. http://www.theses.fr/2020UPASF019.
Pełny tekst źródłaThis manuscript describes the design, synthesis and biological evaluation of oroidin analogs. Oroidin is a monomer of benzosceptrin C, belonging to the pyrrole-2-aminoimidazole family, isolated from marine sponges. The simplification and structural diversification approaches led us to the identification of a non-natural hit displaying selective inhibitory activity against the kinase Aurora B. This kinase plays a key role in cell division and its inhibition leads to severe mitotic abnormalities. Aurora B is found to be up-regulated in many human cancers, indicating that this kinase is a cancer-relevant target. The objective of the study at the interface between chemistry and biology is to optimize the discovered hit into a lead. The hit scaffold is divided in three parts: the 4,5-dibromopyrrole, the imidazo[1,2-a]pyrimidine and the alkyne moieties. After the first introductive chapter, chapters II to IV are dedicated to the pharmacomodulations of each part. We finally managed to synthesize eighty-two analogs for in vitro evaluations toward Aurora B and a panel of kinases involved in diverse human pathologies. Several compounds were found to be very active with IC50 down to 34 nM, displaying a 150-fold higher activity than the initial hit. The last chapter discusses the mode of action of the most active inhibitors from the hit expansion. The enzymatic kinetic assays revealed an uncommon mode of action with allosteric inhibitors (type IV) of Aurora B. Immunostaining experiments highlighted the typical effects of Aurora B inhibition in treated cells as well as its quantification. At last, molecular docking study with the best inhibitor showed the most probable allosteric binding pocket of Aurora B, providing crucial support in hit-to-lead optimization. In conclusion and perspectives, the efforts to be pursued in order to improve physicochemical and pharmacokinetic properties in the lead-to-candidate process are pointed
Munoz, Julie. "Extraction de l’éponge marine Axinella donnani et synthèse d’une chimiothèque d’analogues du dispacamide A". Thesis, Paris 11, 2011. http://www.theses.fr/2011PA112245/document.
Pełny tekst źródłaPyrrole-2-aminoimidazoles (P-2-AIs) are secondary metabolites specifically encountered in marine sponges. They are mainly found in Agelasidae, Halichondridae and Axinellidae families. Thus, the chemical study of the marine sponge Axinella donnani has led to the extension of the current knowledge about the diversity of the family and a better understanding of their biogenesis. Two batches of the sponges have been studied to lead to the isolation of 29 compounds: among them six P-2-AIs new dimers, a new mazacidin molecule and a new 3,5-bromotyrosine dimer. Their structures have been determined with 1D and 2D NMR spectroscopy experiments. Their absolute configuration has also been studied with circular dichroïsm. Additionally, 29 analogues of dipacamide A have been synthetized in order to test these molecules on various biological targets
Letribot, Boris. "Synthèse et évaluation biologique de nouveaux composés hétérocycliques potentiellement inhibiteurs de protéine-kinases". Thesis, La Rochelle, 2015. http://www.theses.fr/2015LAROS002/document.
Pełny tekst źródłaDeregulation of protein kinases leads to numerous pathologies such as cancers and neurodegenerative diseases. In order to identify new scaffolds able to inhibit this proteins we synthesized new 3-alkenyl-oxindoles. By the mean of Appel’s salt chemistry, we develop a new synthetic route to this skeleton. Our approach allows variation of the substituent of the exocyclic akene which can be functionalized by heterocycles, amino-nitriles or thio-nitrile which are obtained after selective ring opening of (1,2,3)-dithiazoles. In another part, given powerful indirubin kinase inhibitory potency, we synthesized new analogs indiribunoids and isoindigoids. In both cases (3-akenyl-oxindoles from Appel’s salt chemistry and indigoids), the aromatic ring were substituted by various electron withdrawing group and nitrogen were incorporated to determinate structure activity relationship. All this 80 original 3-alkenyl-oxindoles were evaluated for their ability to inhibit kinase activity and cell proliferation
Cook, Cyril. "Synthèse totale de l'exiguolide". Paris 11, 2009. http://www.theses.fr/2009PA112229.
Pełny tekst źródłaExiguolide is a macrolide isolated in 2006 from the marine sponge Geodia exigua. It specifically inhibits fertilization of sea urchin gametes but not embryogenesis of the fertilized eggs, which indicates a potential antiviral activity. Exiguolide is a 20-membered ring lactone fused with two 2,6-cis-disubstituted tetrahydropyran rings, one of which bears an exocyclic methoxycarbonylmethylidene appendage which is reminiscent of bryostatins, known antitumor compounds. The macrolactone also bears 7 asymmetric centers and an E,Z,E trienic system. Its absolute configuration was determined by the total synthesis of the unnatural enantiomer ent-Exiguolide reported in 2008. The structure of Exiguolide displays a number of salient motifs rendering this challenging target quite seductive. Our retrosynthetic analysis is based on two highly diastereoselective key-reactions. A tandem Ru(II)-catalyzed ene-yne cross-coupling / oxo-Michaël addition reported by Trost that allows the synthesis of a tetrahydropyran ring controlling the geometry of its methylidene substituent. A conjugated nucleophilic substitution allows the introduction of a methyl group with chirality transfer. The bibliographic introduction displays the various methods of tetrahydropyran rings formation used in natural products syntheses. The first chapter contains the first approaches in the synthesis of Exiguolide and the second chapter displays the synthetic way that allowed achieving the total synthesis of Exiguolide
Smietana, Michael. "Contribution à la synthèse totale des psammaplysines". Université Louis Pasteur (Strasbourg) (1971-2008), 2001. http://www.theses.fr/2001STR13099.
Pełny tekst źródłaKsiążki na temat "Produits de la mer – Synthèse (chimie)"
Carbohydrates-Synthetic Methods and Applications in Medicinal Chemistry. VCH Publishing, 1993.
Znajdź pełny tekst źródłaScheuer, Paul J. Bioorganic Marine Chemistry. Springer, 1991.
Znajdź pełny tekst źródłaScheuer, Paul J. Bioorganic Marine Chemistry. Springer, 1988.
Znajdź pełny tekst źródłaScheuer, Paul J. Bioorganic Marine Chemistry. Springer, 1989.
Znajdź pełny tekst źródłaCombinatorial Synthesis of Natural Product-Based Libraries (Critical Reviews in Combinatorial Chemistry). CRC, 2006.
Znajdź pełny tekst źródłaCzęści książek na temat "Produits de la mer – Synthèse (chimie)"
DEL MAR SAAVEDRA RIOS, Carolina, Adrian BEDA, Loic SIMONIN i Camélia MATEI GHIMBEU. "Le carbone dur pour les batteries Na-ion : de la synthèse aux performances et mécanismes de stockage". W Les batteries Na-ion, 123–74. ISTE Group, 2021. http://dx.doi.org/10.51926/iste.9013.ch3.
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