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Nouveaux tripodes tris-A,C,E-alpha-Cyclodextrine et leurs complexes Métallo-supramoléculaires

Abstract : This work is structured around two main parts: i- the synthesis of new tris-A,C,E-alpha-cyclodextrin tripods, and studies of their complexes with transition metals. The functionalization of bis-heterocycles is an important step in the preparation of tripods. Therefore, the development of a new family of reagents tetrahalo-diarylglycolurils allowed a selective radical halogenation of heteroaromatic pi-deficient systems, non-reactive and involved in the construction of podants cyclodextrinics. The selectivity and the mechanism of the reaction could be partially explained by the formation of a supramolecular complex [reagent / substrate] and the existence of halogen-halogen interactions in solid state; ii- the highlight of a high speciation tripods cyclodextrins towards a number of metals and formation of supramolecular chiral metallo-helices induced by anchoring in position 6,6' of heterocyclic units. The absolute configuration of helicates formed in some cases is resolved
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Guillaume Poisson. Nouveaux tripodes tris-A,C,E-alpha-Cyclodextrine et leurs complexes Métallo-supramoléculaires. Autre. Université de Lorraine, 2012. Français. ⟨NNT : 2012LORR0094⟩. ⟨tel-01749244⟩



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