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<dc:title xml:lang="fr">Optimisation de dérivés 3-benzylmenadiones antiparasitaires rédox-actifs et conception de sondes moléculaires cliquables et/ou photoréactives</dc:title>
<dcterms:alternative xml:lang="en">Optimisation of antiparasitic redox-active 3-benzylmenadiones and design of clickable and/or photoreactive probes</dcterms:alternative>
<dc:subject xml:lang="fr">Chimie clique</dc:subject>
<dc:subject xml:lang="fr">Fluorophore flavylium</dc:subject>
<dc:subject xml:lang="fr">N-hétéroaromatique</dc:subject>
<dc:subject xml:lang="fr">3-benz(o)ylménadione</dc:subject>
<dc:subject xml:lang="en">Click chemistry</dc:subject>
<dc:subject xml:lang="en">Flavylium fluorophore</dc:subject>
<dc:subject xml:lang="en">N-heteroaromatics</dc:subject>
<dc:subject xml:lang="en">3-benz(o)ylmenadione.</dc:subject>
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<dcterms:abstract xml:lang="fr">Les maladies parasitaires, notamment le paludisme dû au parasite P. falciparum, font face à une résistance croissante aux médicaments actuels. L’objectif de cette thèse a été de poursuivre le développement de composés rédox-actifs antiparasitaires, notamment les 3-benz(o)ylménadiones (bMD), dont la molécule-phare, la plasmodione, a montré une activité puissante in vitro mais faible in vivo. En effet, ses propriétés physicochimiques ne sont pas adaptées à un traitement oral efficace, et ses cibles biologiques restent à confirmer. L’un des objectifs était donc de concevoir des outils chimiques pour identifier les cibles selon une stratégie de profilage de protéines (AfBPP) couplée à de l’imagerie bioorthogonale parasitaire. En combinant des sondes cliquables bMDs avec une famille de fluorophores bioinspirés, les flavyliums, ces outils moléculaires ont également permis de créer des pro-fluorophores flavylium-bMD rédox-actifs. Parallèlement, pour améliorer la biodisponibilité et optimiser l’activité antiparasitaire des bMDs, des groupements -pyridine et -pyrimidine ont été introduits via une stratégie de couplage. En outre, deux nouvelles séries ont été synthétisées : i) des triazole-bMD hybrides en utilisant la chimie clique et, ii) des pro-drogues non-quinoniques de la plasmodione fonctionnalisées par un méthyle angulaire métabolisable par le parasite.</dcterms:abstract>
<dcterms:abstract xml:lang="en">Parasitic diseases, particularly malaria caused by the P. falciparum parasite, are facing increasing resistance to current drugs. The aim of this thesis was to pursue the development of antiparasitic redox-active compounds, in particular 3-benz(o)ylmenadiones (bMD), whose lead compound, plasmodione, has shown potent activity in vitro but weak activity in vivo. Its physico-chemical properties are not yet appropriate for effective oral treatment, and its biological targets have yet to be elucidated. One of the objectives was therefore to develop chemical tools for target identification using a protein profiling strategy (AfBPP) coupled with parasite bioorthogonal imaging. By combining clickable bMDs probes with a family of bioinspired fluorophores, the flavyliums, these molecular tools led to the development of redox-active flavylium-bMD pro-fluorophores. At the same time, to improve both the bioavailability and the antiparasitic activity of the bMDs, -pyridine and -pyrimidine groups were introduced via a coupling strategy. In addition, two new series were synthesized: i) triazole-bMD hybrids using click chemistry and, ii) non-quinone based plasmodione pro-drugs functionalized with an angular methyl that can be metabolized by the parasite.</dcterms:abstract>
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