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<dc:title xml:lang="fr">Synthesis and modification of abiotic sequence-defined poly(phosphodiester)s</dc:title>
<dcterms:alternative xml:lang="en">Synthèse et modification de poly(phosphodiester)s non-biologiques contenant des séquences codées de monomères</dcterms:alternative>
<dc:subject xml:lang="fr">Polymères encodés numériquement</dc:subject>
<dc:subject xml:lang="fr">Polymères à séquences définies</dc:subject>
<dc:subject xml:lang="fr">Chimie des phosphoramidites</dc:subject>
<dc:subject xml:lang="fr">Modification post-polymérisation</dc:subject>
<dc:subject xml:lang="fr">CuAAC</dc:subject>
<dc:subject xml:lang="fr">Synthèse de poly(phosphodiester)s photocontrôlée</dc:subject>
<dc:subject xml:lang="fr">Effacer/révéler des séquences d’information</dc:subject>
<dc:subject xml:lang="en">Digitally encoded polymers</dc:subject>
<dc:subject xml:lang="en">Sequence-defined polymers</dc:subject>
<dc:subject xml:lang="en">Phosphoramidite chemistry</dc:subject>
<dc:subject xml:lang="en">Solid-phase synthesis</dc:subject>
<dc:subject xml:lang="en">Post-polymerization modification</dc:subject>
<dc:subject xml:lang="en">CuAAC</dc:subject>
<dc:subject xml:lang="en">Photocontrolled phosphodiester synthesis</dc:subject>
<dc:subject xml:lang="en">Erase/reveal sequence information</dc:subject>
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<tef:elementdEntree autoriteExterne="050797360" autoriteSource="Sudoc">Synthèse en phase solide</tef:elementdEntree>
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<dcterms:abstract xml:lang="fr">Récemment, la chimie des phosphoramidites s’est montrée efficace et polyvalente en tant que plateforme pour accéder à des poly(phosphodiester)s à séquence définies abiotiques. Grâce à cette stratégie, les monomères peuvent être placés dans la chaîne à des positions choisies, ouvrant la voie à de nombreuses possibilités pour la préparation de macromolécules fonctionnelles. Ici, la méthode phosphoramidite a été explorée pour la synthèse de polymères dits numériques, qui contiennent des séquences de monomères encodées binairement. Des polymères dont les longueurs de chaînes et les séquences numériques sont contrôlées ont été préparés en utilisant une stratégie phosphoramidite classique impliquant des groupements protecteurs diméthoxytrityles, ou bien un procédé photocontrôlé faisant intervenir des groupements nitrophénylpropyloxycarbonyles clivables à la lumière. En outre, plusieurs stratégies pour modifier l’information contenue dans les chaînes latérales ont été étudiées dans cette thèse. Une modification binaire post-polymérisation à travers deux cycloadditions alcyne-azoture catalysées par le cuivre(I) consécutives a été examinée pour optimiser les chaînes latérales des poly(phosphodiester)s à séquences définies. De plus, la libération photocontrôlée de différents motifs éthers ortho-nitrobenzyliques latéraux a été étudiée. Ces fonctions ont permis la conception d’oligo(phosphodiester)s numériques dont les séquences d’information peuvent être effacées ou révélées grâce à la lumière.</dcterms:abstract>
<dcterms:abstract xml:lang="en">Phosphoramidite chemistry has recently been evidenced to be an efficient and versatile platform to access sequence-defined abiotic poly(phosphodiester)s. Using this strategy, monomers can be placed at defined positions positions in a chain, thus opening up wide possibilities for the preparation of functional macromolecules.Here, the phosphoramidite platform was explored to synthesize so-called digital polymers, which contain monomer-coded binary sequences. Polymers with controlled chain lengths and digital sequences were prepared using either a standard phosphoramidite strategy involving dimethoxytrityl protective groups or a photo-controlled process involving light-cleavable nitrophenylpropyloxycarbonyl protective groups. Additionally, several strategies to modify the side chain information were investigated in this thesis. A binary post-polymerization modification by means of sequential copper(I)-catalyzed alkyne-azide cycloadditions was investigated for tuning the side chain functionality of sequence-defined poly(phosphodiester)s. Moreover, the photo-controlled release of several ortho-nitrobenzylic ether side chain motifs was studied. These moieties allowed the design of digital oligo(phosphodiester)s whose sequence information can be erased or revealed with light as a trigger.</dcterms:abstract>
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