Synthèse de nouveaux systèmes polyaza-hétérocycliques pyridaziniques et pyrroliques : nouvelles méthodologies de synthèse et application en chimie supramoléculaire
Auteur / Autrice : | Christophe Aubé |
Direction : | Didier Dubreuil, Eric Leonel |
Type : | Thèse de doctorat |
Discipline(s) : | Chimie, Chimie organique |
Date : | Soutenance en 2012 |
Etablissement(s) : | Nantes |
Partenaire(s) de recherche : | autre partenaire : Université de Nantes. Faculté des sciences et des techniques |
Mots clés
Résumé
The nitrogen heterocycles, pyridazine and pyrrole, are present in many molecules with interests in field such as biology (antifungal, anti-inflammatory, anticancer agents. . . ), electronic (organic transistors), supramolecular chemistry (self-organizing architectures like grid and helix) and organic catalysis. We first focused on the development of a new methodology for the synthesis of dissymmetrical 3,6-diaryl- and triheteroaryl-pyridazines involving the formation of two successive C-C bonds by the use of triaryl- and triheteroaryl-bismuths reagents. Then, biological tests will be conducted to assess their potential, particularly in oncology. The second part of our work concerns the synthesis of new polyaza-heteroaromatic compounds, based on pyridazinic and pyrrolic cycles, inserted in the middle of an oligoamidic sequence to form a helical foldamer, able to encapsulate substrates. The role of this ”central linker” is to modulate the volume of the foldamer cavity in order to trap molecules with different sizes. The strategies used for the synthesis of the linkers based on pyridazines pass through C-C cross-coupling reactions and those based on pyrrolic cycles involve an electrochemical reduction of pyridazines.