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<dc:title xml:lang="fr">Synthèse de groupements protecteurs photolabiles sensibles à l'excitation bi-photonique pour la libération du glutamate et de la nicotine</dc:title>
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<dc:subject xml:lang="fr">Chimie biologie</dc:subject>
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<dc:subject xml:lang="fr">Excitation à deux photons</dc:subject>
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<dc:subject xml:lang="fr">Neurosciences</dc:subject>
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<dc:subject xml:lang="en">Chemical biology</dc:subject>
<dc:subject xml:lang="en">Organic chemistry</dc:subject>
<dc:subject xml:lang="en">Two-photon excitation</dc:subject>
<dc:subject xml:lang="en">Photoremovable protecting groups</dc:subject>
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<tef:elementdEntree autoriteExterne="228922003" autoriteSource="Sudoc">Groupements protecteurs photolabiles</tef:elementdEntree>
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<dcterms:abstract xml:lang="fr">Ce projet de thèse consiste à développer de nouveaux groupements protecteurs photolabiles (GPP) et de les adapter pour qu’ils puissent être utilisés en biologie, notamment, en neurosciences. Le projet principal de ce travail de thèse est de développer des précurseurs photolabiles du glutamate. Ainsi, deux GPPs sensibles à l’excitation bi-photonique ont été élaborés et utilisés pour libérer du glutamate sur tranches de cervelet par l’équipe du Dr. Philippe Isope. Une collaboration avec l’équipe du Dr. Nicolas Vitale a ensuite été entreprise dans le but de développer un précurseur photolabile de la nicotine. Cela a mené au développement d’un GPP permettant de libérer la nicotine efficacement après excitation à un photon dans le vert. Pour finir, une nouvelle série de coumarines au squelette rigidifié a été développée au laboratoire à l’aide de réactions domino initiées par une carbopalladation 5-exo-dig suivie d’un couplage de Suziki-Miyaura ou de Sonogashira. Ce travail d’ingénierie moléculaire par rigidification du squelette de ces coumarines a permis de développer des GPPs possédants d’excellentes sensibilités à l’excitation bi-photonique.</dcterms:abstract>
<dcterms:abstract xml:lang="en">This thesis project consists in the development of new photoremovable protecting groups (PPGs) and their adaptations for different areas of neuroscience. The main aim involved the development of caged glutamate. Hence, two two-photon sensitive PPGs were synthesized and used to uncage glutamate on brain slices by Dr. Philippe Isope’s team. An additional collaboration with the team of Dr. Nicolas Vitale was then undertaken to design a caged nicotine. This project led to an elaboration of a PPG able to uncage nicotine efficiently upon green irradiation. Finally, a series of highly rigidified coumarine based PPGs were developed using a 5-exo-dig carbopallation followed by a Suzuki-Miyaura or Sonogashira cross-coupling reactions. This work of molecular engineering led to the synthesis of highly two-photon sensitive PPGs.</dcterms:abstract>
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