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Littérature scientifique sur le sujet « Cyclopeptoids »
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Articles de revues sur le sujet "Cyclopeptoids"
Sala, Giorgio Della, Brunello Nardone, Francesco De Riccardis et Irene Izzo. « Cyclopeptoids : a novel class of phase-transfer catalysts ». Org. Biomol. Chem. 11, no 5 (2013) : 726–31. http://dx.doi.org/10.1039/c2ob26764k.
Texte intégralComegna, Daniela, Monica Benincasa, Renato Gennaro, Irene Izzo et Francesco De Riccardis. « Design, synthesis and antimicrobial properties of non-hemolytic cationic α-cyclopeptoids ». Bioorganic & ; Medicinal Chemistry 18, no 5 (mars 2010) : 2010–18. http://dx.doi.org/10.1016/j.bmc.2010.01.026.
Texte intégralSchettini, Rosaria, Brunello Nardone, Francesco De Riccardis, Giorgio Della Sala et Irene Izzo. « Cyclopeptoids as Phase-Transfer Catalysts for the Enantioselective Synthesis of α-Amino Acids ». European Journal of Organic Chemistry 2014, no 35 (10 novembre 2014) : 7793–97. http://dx.doi.org/10.1002/ejoc.201403224.
Texte intégralSchettini, Rosaria, Brunello Nardone, Francesco De Riccardis, Giorgio Della Sala et Irene Izzo. « ChemInform Abstract : Cyclopeptoids as Phase-Transfer Catalysts for the Enantioselective Synthesis of α-Amino Acids. » ChemInform 46, no 18 (16 avril 2015) : no. http://dx.doi.org/10.1002/chin.201518066.
Texte intégralDella Sala, Giorgio, Irene Izzo, Rosaria Schettini, Assunta D’Amato et Francesco De Riccardis. « Catalytic Alkylation of 2-Aryl-2-oxazoline-4-carboxylic Acid Esters Using Cyclopeptoids ; Newly Designed Phase-Transfer Catalysts ». Synthesis 49, no 06 (24 novembre 2016) : 1319–26. http://dx.doi.org/10.1055/s-0036-1588102.
Texte intégralSchmidt, Ulrich. « Natürliche Cyclopeptide und Cyclopeptolide ». Nachrichten aus Chemie, Technik und Laboratorium 37, no 10 (octobre 1989) : 1034–43. http://dx.doi.org/10.1002/nadc.19890371006.
Texte intégralLepage, Mathieu L., Alessandra Meli, Anne Bodlenner, Céline Tarnus, Francesco De Riccardis, Irene Izzo et Philippe Compain. « Synthesis of the first examples of iminosugar clusters based on cyclopeptoid cores ». Beilstein Journal of Organic Chemistry 10 (23 juin 2014) : 1406–12. http://dx.doi.org/10.3762/bjoc.10.144.
Texte intégralLepage, Mathieu L., Jérémy P. Schneider, Anne Bodlenner, Alessandra Meli, Francesco De Riccardis, Marjorie Schmitt, Céline Tarnus et al. « Iminosugar-Cyclopeptoid Conjugates Raise Multivalent Effect in Glycosidase Inhibition at Unprecedented High Levels ». Chemistry - A European Journal 22, no 15 (24 février 2016) : 5151–55. http://dx.doi.org/10.1002/chem.201600338.
Texte intégralTedesco, Consiglia, Eleonora Macedi, Alessandra Meli, Giovanni Pierri, Giorgio Della Sala, Christina Drathen, Andrew N. Fitch, Gavin B. M. Vaughan, Irene Izzo et Francesco De Riccardis. « Synthesis, crystallization, X-ray structural characterization and solid-state assembly of a cyclic hexapeptoid with propargyl and methoxyethyl side chains ». Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials 73, no 3 (1 juin 2017) : 399–412. http://dx.doi.org/10.1107/s2052520617002505.
Texte intégralHarant, Hanna, Barbara Wolff, Erwin P. Schreiner, Berndt Oberhauser, Lotte Hofer, Nicole Lettner, Sabine Maier, Jan E. de Vries et Ivan J. Lindley. « Inhibition of Vascular Endothelial Growth Factor Cotranslational Translocation by the Cyclopeptolide CAM741 ». Molecular Pharmacology 71, no 6 (16 mars 2007) : 1657–65. http://dx.doi.org/10.1124/mol.107.034249.
Texte intégralThèses sur le sujet "Cyclopeptoids"
Nardone, Brunello. « Synthesis, Structure and Properties of Cyclopeptoids and Cyclopeptides ». Doctoral thesis, Universita degli studi di Salerno, 2014. http://hdl.handle.net/10556/1463.
Texte intégralAim of the research project has been the synthesis of cyclopeptides and cyclopeptoids in order to investigate their structural properties and catalytic activities. In particular, studies of the arrangement and the cyclopeptoids organization in the crystal structure have been realized. Moreover, the influence of some aminoacidic residues on conformational control of peptoid skeleton was evaluated. In this context, the effect of proline, an amminoacid with an important role in the formation of secondary protein structures,1 and of a pseudo-proline residue on the cystal structure and conformational equilibria of some cyclopeptoids was evaluated. In particular, N-methoxyethyl cyclic peptoids containing proline and N-methoxyethyl hexacyclopeptoid (proline-free) in complexed and uncomplexed form (1-3, figure 1) were successfully synthesized and characterized by X-ray diffraction. In addition, the synthesis of a cyclohexapeptoid containing a pseudo-proline residue was obtained (4, figure 1). Furthermore, two isomeric amphiphilic peptoids (5 and 6, figure 1) were synthesized in order to investigate the effect of amphiphilicity on the crystal frame. All that is described in sections 2,3. Moreover, considering the well documented complexation properties of cyclopeptoids towards alkaline metals,2 the ability of some cyclohexapeptoids to work as phase-transfer catalysts was investigated in a benchmark SN2 reaction. In particular, the cyclopeptoid which revealed to be the most active was the N-[2-(2-methoxyethoxy)ethyl] side chain cyclohexapeptoid (7, figure 2). Therefore, we also tested some proline-rich cyclopeptoids in asymmetric phase transfer catalysis and the most promising demonstrated to be the cyclopeptoid 8 (figure 2) alternating N-3,5-dimethyl benzylamine glycine and proline residues. The catalytic studies mentioned are illustrated in section 4. Finally, in section 5 is reported a novel synthetic strategy for the synthesis of the biologically active cyclotide kalata B1 (9, figure 4) based on Fmoc/t-Bu solid phase synthesis and on the use of an innovative linker... [edited by author]
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Batisse, Chloé. « Nouvelles voies de synthèse énantiosélective pour l'accès à des composés difluorométhylés ». Thesis, Strasbourg, 2018. http://www.theses.fr/2018STRAF041/document.
Texte intégralDespite being largely absent from natural products and biological processes, fluorine plays an increasingly important role in numerous areas of our daily life. The presence of fluorine atoms or fluoroalkyl groups in bioactive molecules can indeed deeply modify their physical, chemical and biological properties. In addition to these outstanding properties common to many emerging fluorinated groups, the -CHF2 group has been shown to be an interesting bioisostere of hydroxyl, thiol and amine groups and a strong hydrogen bond donor. However, in contrast to enantioselective trifluoromethylation, the enantioselective introduction of a difluoromethyl group is still in its infancy. For instance only few examples in the literature describe the synthesis of enantioenriched α,α-difluoromethyl alcohols. As part of our study to overcome this scarcity, we envisaged two different strategies to synthesise these compounds. The first method aimed to access highly enantioenriched α,α-difluoromethyl alcohols by using an enantiopure aryl α,α-difluoromethyl sulfoxide as chiral and traceless auxiliary. Phase transfer catalysis was chosen as a second strategy for the enantioselective difluoromethylation of carbonyl derivatives in presence of chiral cyclopeptoïds. Those two methods and the results obtained are discussed in this manuscript
Lepage, Mathieu. « Conception et synthèse de nouvelles classes d’iminosucres d’intérêt biologique : ingénierie click pour des systèmes multivalents ». Thesis, Strasbourg, 2014. http://www.theses.fr/2014STRAF049/document.
Texte intégralRecent reports have demonstrated the first pieces of evidence of a strong multivalent effect in glycosidase inhibition by iminosugars, with affinity enhancements close to 10000. In order to understand the different parameters of this “cluster effect” and to continue its optimization, new scaffolds must be designed. The first research topic was thus to develop a set of « Click » Chemistry engineering techniques for the synthesis of multivalent systems, with the development of a Sweet LEGO® strategy. In the end, it would allow an easy access to a broad range of prefunctionalized neocyclodextrins. The second research topic consisted in a structure-activity relationship study by varying the molecular polyalkyne scaffold used for the preparation of new clusters by way of « Click » Chemistry. They allowed to investigate the specific features of the iminosugar cluster effect in the inhibition of glycosidases. In particular, a compound of unprecedented valency bearing 30 iminosugar units demonstrated an unprecedented dramatic affinity enhancement for the inhibition of a model enzyme (Jack bean alpha-mannosidase)
POURTIER, ALBIN. « Description et caracterisation d'agents modulant la resistance tumorale pleiotropique mediee par la p-glycoproteine ». Strasbourg 1, 1993. http://www.theses.fr/1993STR15096.
Texte intégralSchneider, Jérémy. « Synthèse d'une diversité de glycoclusters : effet multivalent sur l'inhibition des glycosidases ». Thesis, Strasbourg, 2017. http://www.theses.fr/2017STRAF005.
Texte intégralThe first multivalent iminosugars were published in 1999. From this date, it’s more than a hundred of clusters that were synthesized and presented in about forty publications. In 2010, the first strong multivalent effect in glycosidase inhibition was obtained and prompted further studies of its mechanism and its limits. To reach these goals, this PhD work has developed different strategies. The first was to synthesize "clickable" dendrons which can lead to a multiplication of the initial valency of our scaffolds by three or by nine. The second approach was a study to obtain rigid linkers. The third one was the preparation of modular scaffolds, neo-cyclodextrins, in order to finely tune the topology of the resulting clusters. The combination of our "clickable" dendrons with cyclopeptoid scaffolds gave an unprecedented multivalent effect on glycosidase inhibition. The 36-valent DNJ-based cluster is indeed a 170 000-fold more potent inhibitor than the corresponding monovalent control for Jack Bean alpha-mannosidase
Actes de conférences sur le sujet "Cyclopeptoids"
Oberhauser, B., B. Grohmann et H. Sperner. « Selective Epimerisation of a Fungal Cyclopeptolide via an 2-Amino-oxazole Intermediate - Conformational Consequences ». Dans The 2nd International Electronic Conference on Synthetic Organic Chemistry. Basel, Switzerland : MDPI, 1998. http://dx.doi.org/10.3390/ecsoc-2-01702.
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