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Calixarènes et composés apparentés à propriétés anti-infectieuses

Abstract : The main objective of this work is based on the search and the development of new antibacterial compounds able to interact with a bacterial wall. The proposed compounds are of polycationic nature, elaborated on calixarene structure or an aromatic platform and containing guanidinium functions in various number and position. Some of them were developed as water-soluble prodrugs of the quinolone: nalidixic acid. The chapter I talk about introduction and a bibliographical study on calixarenes and their applications in biology. The chapter II presents the results obtained for the synthesis, the characterization of the partially substituted analogues of the tétra-para (guanidinoéthyl) calix[4]arene. The objective of this part is to understand the role and the importance of the number and the positioning of the guanidines functions on the calixarene core. In chapter III, are presented the various steps leading to the synthesis, the characterization and the evaluation by HPLC ways of new water-soluble prodrugs. The work is centered on a set of ionic derivatives of calix[4]arenes carriers of nalidixic acid. The prodrug behavior was demonstrated for one of them. The chapter IV presents the syntheses and characterizations of star-like poly-ionic structures are described, based on a benzene core, including a variable number of para (guanidinoéthyl) phényléther subunits. The chapter V is dedicated to the results of the biological evaluations of all the structure synthetized. For some compounds, viability and cellular toxicity were evaluated on eukaryotic cells. We show that many of the new prepared derivatives, prodrugs or not, present very interesting anti-bacterial activities
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Hugues Massimba Dibama. Calixarènes et composés apparentés à propriétés anti-infectieuses. Autre. Université Henri Poincaré - Nancy 1, 2010. Français. ⟨NNT : 2010NAN10123⟩. ⟨tel-01746352⟩



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