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Artykuły w czasopismach na temat "Fonctionnalisation directe C—H"
Solomon, Aharon, i Itamar Glazer. "Desiccation survival of the entomopathogenic nematode Steinernema feltiae: induction of anhydrobiosis". Nematology 1, nr 1 (1999): 61–68. http://dx.doi.org/10.1163/156854199507983.
Pełny tekst źródłaKalic, Jovanka. "Srpska drzava i Ohridska arhiepiskopija u XII veku". Zbornik radova Vizantoloskog instituta, nr 44 (2007): 197–208. http://dx.doi.org/10.2298/zrvi0744197k.
Pełny tekst źródłaBobotsis, Robert, Michael Sawchuk, Jenny Shu i Mariamma G. Joseph. "An Unusual Case of Drug-Induced Linear IgA Bullous Disease". Canadian Journal of General Internal Medicine 12, nr 2 (30.08.2017). http://dx.doi.org/10.22374/cjgim.v12i2.239.
Pełny tekst źródłaRozprawy doktorskie na temat "Fonctionnalisation directe C—H"
Rey-Rodriguez, Romain. "Fonctionnalisation directe métallo-catalysée de liaison C-H d’énamides". Thesis, Orléans, 2016. http://www.theses.fr/2016ORLE2005/document.
Pełny tekst źródłaThe aim of this Ph.D thesis was the development of new synthetic methods for the metal-catalysed direct CH functionalization of enamide with chemo-, regio- and possible enantioselectivity. First, we have developped a C3-selective trifluoromethylation of enamide with Fe (II) catalyst involving new sources of fluoride (Togni’s reagent II) with a radical mechanism. Secondly, two new synthetic methods with Fe(II) and Fe(III) were promoted for the selective azidation of enamides respectively at C2 and C3 position involving difunctionalization of the C=C double bond. β-azido alcohols and α-azido esters were then synthesized by controlling the diastereoselectivity for the trans isomer. Finally, studies on the reactivity of nitrenes on enamides allowed us to develop oxyamidation reaction and CH amination with a selective insertion of nitrenes respectively on the double bond C=C or at C4 position. The outcome of the reaction is highly substrate-dependent and several γ-amino enamides and β-amino ethers have been synthesized
Sahnoun, Sophian. "C-H fonctionnalisation de purines : synthèse d’inhibiteurs potentiels de la HSP90". Thesis, Paris 11, 2011. http://www.theses.fr/2011PA114803/document.
Pełny tekst źródłaResistance to current treatments of cancer encourages finding new therapeutical targets. The heat shock protein 90 (hsp90) is a molecular chaperon which regulates the folding of many client proteins associated with all of the six hallmarks of cancer, and helps maintaining their proper conformation. Consequently, the hsp90 has become an exciting new target in cancer drug discovery since the inhibition of its ATPase activity leads to depletion of these client proteins via the proteasomal pathway. PU3 and PU24S are purine-based hsp90 inhibitors functionalized on C-8 position. In the aim to identify more active compounds and/or new subfamilies of inhibitors, we have developed new metal-catalyzed C-H activation processes of various heterocycles including purines and other azoles. These new and simple approaches have allowed the access to numerous C-8 functionalized purines bearing (het)aryl, alkenyl and benzyl moieties
Sahnoun, Sophian. "C-H fonctionnalisation de purines : synthèse d'inhibiteurs potentiels de la HSP90". Phd thesis, Université Paris Sud - Paris XI, 2011. http://tel.archives-ouvertes.fr/tel-00692582.
Pełny tekst źródłaVabre, Roxane. "Fonctionnalisation directe de liaisons C-H et couplages croisés pour la formation de liaisons C-C et C-N : synthèse de purines 6,8,9-trisubstituées". Phd thesis, Université Paris Sud - Paris XI, 2013. http://tel.archives-ouvertes.fr/tel-00923198.
Pełny tekst źródłaNaturale, Guillaume. "Approches radicalaires pour la fonctionnalisation directe de quinones à visée anticancereuse". Thesis, Bordeaux 1, 2012. http://www.theses.fr/2012BOR14635/document.
Pełny tekst źródłaIn our ongoing course dedicated to the discovery of small anticancer molecules, we designed novel quinone derivatives. Our first objective was to fashion non-peptidic Smac mimics, able to trigger apoptosis in tumor cells, displaying a structure rigidified by conformational restrictions. Otherwise, the kinases and the phosphatases, acting as phosphorylating / dephosphorylating agents mostly in the control of the cell cycle, were thought to be other relevant biological targets. An intent study of their known inhibitors allowed us to underline trends in their chemical structure and made us plan the synthesis of functionalized naphthoquinones.A dedicated approach involving radical decarboxylation of amino acids allowed the introduction of aliphatic side chains on our substrates though C(sp2)–C(sp3) bond formation. Ag(I)/S2O82- was used as alkyl radical initiator and the direct C-H alkylation of the quinonic positions could take place. C(sp2)–C(sp2) bonds were created through aryl radicals generation from stable diazonium salts or anilines which allowed the direct C-H arylation of quinones. The procedures described along this manuscript let us formulate several advances on the substrates reactivity and on the reaction mechanisms involved
Baladi, Tom. "Autour du noyau imidazo[4,5-b]pyridine : inhibiteurs potentiels de la protéine kinase Tyro3 et fonctionnalisation directe de liaisons C – H". Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLS386/document.
Pełny tekst źródłaBladder cancer is a major medical issue, being the fourth most frequent cancer in men and treatable only with heavy surgery and/or broad-spectrum chemotherapy. This thesis project deals with the discovery of new targeted therapies of bladder cancer by blocking specifically, at a molecular scale in cancer cells, the signaling pathways in which protein kinase Tyro3 is involved. Indeed, its overexpression in most bladder cancers and the major part it plays in cancer cells survival have led to the validation of protein kinase Tyro3 as a therapeutic target for the treatment of bladder cancer. This thesis project can be divided into three main parts: the development of new synthetic methods around the imidazo[4,5-b]pyridine scaffold, the synthesis of a library of compounds using these methods and eventually the study of structure-activity relationships of these compounds versus Tyro3
Collado, Ruiz Sandra. "Palladation et fonctionnalisation de pyrimidinones et d'imidazolones". Thesis, Normandie, 2018. http://www.theses.fr/2018NORMIR21/document.
Pełny tekst źródłaSince past decade, our laboratory is concerned with transition-metal catalyzed C-H functionalization of heterocycles. A recent research program is dedicated to the class of N-acyl amidine pro-aromatic heterocycles. This present thesis work is first directed to the pyrimidin-4-one series that remains highly sparsely evaluated. As main results, Pd(0)-catalyzed and Cu(I)-assisted C2-H arylation of pyrimidin-4-one flanked with picolinyl and other ortho-directed groups at the nitrogen atom was set up using arylhalides as coupling partners. The C5-substituted pyrimidin-4-ones were also evaluated. To pursue recent investigations in 4-alkyl and 4-arylidene imidazolone series leaing ding to innovative GFP probes, the second work aims at evaluating the first step of an ultimate intramolecular C-H/C-H coupling to stiffen the 4-arylidene imidazolone core. For that, the intramolecular ortho-palladation was achieved in collaboration with Dr. Esteban Urriolabeitia of the University of Zaragoza in Spain providing a broad panel of original imidazolone-based palladacycles. Their photophysical properties were determined and their reactivity towards cross-coupling as well as oxidating agents were also evaluated
Muselli, Mickaël. "Synthèse et fonctionnalisation directe catalytique de la liaison C-H d'imidazolones : nouvel accès aux fluorophores analogues de la GFP". Thesis, Normandie, 2017. http://www.theses.fr/2017NORMIR10/document.
Pełny tekst źródłaImidazolones have been studied for a long time, either as bioactive molecules or for their fluorescence properties, the best known example being the Green Fluorescent Protein or GFP. Numerous syntheses are already described, in particular the condensation of an amine with an oxazolone (Erlenmeyer method). In this work, we not only improved the condensation protocol but also developed an original synthesis consisting in using 2-H imidazolones CH arylation. To this end, it was first necessary to develop a protocol for the synthesis of 2-H imidazolones, hitherto very little described, and then to develop the conditions for arylation and direct vinylation of these molecules. Two sets of imidazolones have been studied and published separately: first, the 4,4'- dialkylimidazolones, frequently used for their biological properties, followed by arylation and vinylation of 4-arylidene-2-H imidazolones
Zhao, Qun. "Palladium-catalyzed directed introduction of α-CF3-vinyl and SCF3 groups by C-H bond functionalization". Thesis, Normandie, 2017. http://www.theses.fr/2017NORMIR15.
Pełny tekst źródłaRecent years have witnessed a great development of the organofluorine chemistry field. In particular, the introduction of emergent fluorinated moieties onto various scaffolds has attracted attention of the scientific community because of their special properties. Besides, transition metal-catalyzed directed C-H bond functionalization strategy has brought a revolution in the development of original synthetic methodologies, since it allows straightforward and more atom-economical processes. Thus, the design of new synthetic approaches for the introduction of fluorinated moieties by transition metal-catalyzed C-H bond functionalization pathway is particularly appealing. Therefore, in this Ph.D. thesis, we focused on the development of new methodologies for the direct introduction of fluorinated moieties onto arenes and olefins by transition metal catalyzed directed C(sp2)-H bond functionalization. In particular, we turned our attention to the 2-bromo-3,3,3-trifluoropropene (BTP), an inexpensive fluorinated reagent coming from industry waste, used as a potential halon replacement for fire suppression and as a fluorinated building block in organic synthesis (Chapter 1). The first part of this Ph.D. thesis was dedicated to the development of new methodologies for the direct introduction of a CF3- vinyl moiety onto arenes and olefins by a Pd-catalyzed directed C(sp2)-H bond functionalization with BTP. Then, this approach was extended to the functionalization of α,β-unsaturated esters, although a different reaction pathway is probably involved (Chapter 2). In the second part of this Ph.D. thesis, we developed a new methodology for the direct introduction of the SCF3 group onto arenes and olefins by Pd-catalyzed directed C(sp2)-H bond functionalization using the Munavalli reagent (Chapter 3)
De, Robichon Morgane. "Accès à des C-glycosides par fonctionalisation C-H métallo-catalysée de la position anomère orientée par un groupement directeur". Electronic Thesis or Diss., CY Cergy Paris Université, 2021. http://www.theses.fr/2021CYUN1049.
Pełny tekst źródłaGlycoconjugates are ubiquitous in living organisms and are involved in a wide range of biological processes, such as cell adhesion or cell recognition. Considering the importance of these compounds, chemists are increasingly synthesizing these structures of interest and their analogues. In particular, C-arylglycosides have proven to be excellent drug candidates, as illustrated by the gliflozin family, six members of which are known to treat type 2 diabetes. Functionalization of C-H bonds is an effective and emerging method of transformation. Given the large number of C-H bonds in complex substrates, the use of strategically placed directing groups (DG) overcomes the regioselectivity issues inherent in activating a specific C-H bond. However, examples of metal-catalyzed C-H functionalization (MCF) on sugars are still scarce and MCF of Csp2-H bonds remain more developed than Csp3-H.The first part of the project focuses on the metal-catalyzed Csp2-H functionalization of glycals (sugars with an intracyclic double bond) directed to the pseudo-anomeric position (position 1). The prior introduction of a DG at position 2 of various glycals allowed the development of a palladium-catalyzed C-H arylation, affording 20 examples in excellent yields. Subsequently, C-alkynylglycosides could be synthesized by nickel-catalyzed C-H alkynylation, using the same strategy. These compounds were engaged in a click reaction leading to glycoconjugates. In both methodologies, the protecting groups could not be removed, but two methods to cleave the DG are proposed. Finally, a carbonylative C-H arylation methodology was initiated during this thesis.The second part of the project concerns the development of C-glycosides from saturated glycopyranosides via a MCF of a tertiary anomeric Csp3-H bond. To target the anomeric site, we chose to place the DG at position 1. Starting substrates with different types of directing groups could already be synthesized, but the functionalization of the anomeric C-H bond by an intermolecular process has not been conclusive so far
Części książek na temat "Fonctionnalisation directe C—H"
"Chapitre 17 - Activation C-H et fonctionnalisation des alcanes et des arènes". W Chimie organométallique et catalyse, 419–42. EDP Sciences, 2020. http://dx.doi.org/10.1051/978-2-7598-1106-9-022.
Pełny tekst źródła"Chapitre 17 - Activation C-H et fonctionnalisation des alcanes et des arènes". W Chimie organométallique et catalyse, 419–42. EDP Sciences, 2020. http://dx.doi.org/10.1051/978-2-7598-1106-9.c022.
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