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<dc:title xml:lang="fr">Cascades radicalaires induites par transfert d’atome d’hydrogène métallocatalysé pour la génération de complexité moléculaire</dc:title>
<dcterms:alternative xml:lang="en">Metal-catalyzed hydrogen atom transfer induced radical cascades for the generation of molecular complexity</dcterms:alternative>
<dc:subject xml:lang="fr">Cascades radicalaires</dc:subject>
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<dc:subject xml:lang="fr">Transfert d'atome d'hydrogène</dc:subject>
<dc:subject xml:lang="fr">1,n-énymes</dc:subject>
<dc:subject xml:lang="fr">Catalyse au fer</dc:subject>
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<dc:subject xml:lang="en">Radical cascades</dc:subject>
<dc:subject xml:lang="en">MHAT</dc:subject>
<dc:subject xml:lang="en">Hydrogen Atom Transfer</dc:subject>
<dc:subject xml:lang="en">1,n-enymes</dc:subject>
<dc:subject xml:lang="en">Iron catalysis</dc:subject>
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<dcterms:abstract xml:lang="fr">L’objectif principal de cette thèse a été la conception de nouvelles réactions radicalaires en cascade combinant deux modes distincts de Transfert d’Atome d’Hydrogène, par des voies métallocatalysée (MHAT) et intramoléculaire (1,n-HAT), visant la formation de structures complexes à partir de substrats 1,n-énynes simples d’accès, et ce dans des conditions respectueuses de l’environnement. La faisabilité de l’hypothèse initiale de la séquence enyne programmée a d’abord été étudiée en termes intermoléculaires. Une optimisation approfondie des conditions réactionnelles et paramètres optimaux des substrats a permis la mise au point de séquences efficaces en séries « est » et « ouest ».Les séquences de cascade radicale intramoléculaire induites par le MHAT impliquant des bicyclisations 5/6-exo-dig / 5-exo/endo-trig ont été étudiées, donnant accès à de nouveaux échafaudages moléculaires.</dcterms:abstract>
<dcterms:abstract xml:lang="en">The main objective of the current work was to employ combined MHAT and 1,n-HAT strategies to form complex structures in a controlled manner via designed novel cascade reactions using programmed enynes as substrates and explore the mechanism behind these transformations. The feasibility of the initial hypothesis of the programmed enyne sequence was first investigated in intermolecular terms. A thorough optimization of the reaction conditions and optimal substrate parameters allowed the development of efficient sequences in series «east» and «west».MHAT-induced intramolecular radical cascade sequences involving 5/6-exo-dig / 5-exo/endo-trig bicyclizations were investigated, providing access to new molecular scaffolds.</dcterms:abstract>
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