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<dc:title xml:lang="en">Novel access to heteroaromatic building blocks bearing diversely fluorinated substituents</dc:title>
<dcterms:alternative xml:lang="fr">Nouvel accès à des building blocks hétéroaromatiques comportant divers groupements fluorés</dcterms:alternative>
<dc:subject xml:lang="fr">Hétérocycles aromatiques</dc:subject>
<dc:subject xml:lang="fr">Fluor</dc:subject>
<dc:subject xml:lang="fr">Activité biologique</dc:subject>
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<dc:subject xml:lang="en">Aromatic heterocycles</dc:subject>
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<tef:elementdEntree autoriteExterne="034646000" autoriteSource="Sudoc">Composés aromatiques fluorés</tef:elementdEntree>
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<dcterms:abstract xml:lang="fr">Dans un contexte où il est préférable de limiter les quantités de principes actifs, aussi bien dans les médicaments que dans les produits phytosanitaires, il est important de développer des produits dont l’activité biologique est augmentée. Pour ce faire, il est possible d’utiliser des hétérocycles aromatiques contenant des groupements fluorés. Ainsi, nous nous sommes intéressés au développement de voies d’accès à des building blocks hétéroaromatiques portant divers groupements fluorés afin de fournir de nouvelles possibilités pour la préparation de composés d’intérêt thérapeutique et phytosanitaire. Trois projets ont été réalisés, et ont résulté en la préparation efficace de pyridines comportant des groupements trifluorométhoxy, chlorodifluorométhoxy et dichlorofluorométhoxy. Une voie de synthèse régiosélective de 3,5-bis(fluoroalkyl) pyrazoles a également été mise au point. Tous ces méthodes de synthèse ont été développées de manière à obtenir les produits en peu d’étapes à partir de produits commerciaux et sont transposables à grande échelle.</dcterms:abstract>
<dcterms:abstract xml:lang="en">The current trend is to lower the amounts of active ingredients used, in pharmaceutical chemistry and in agrochemistry. Therefore, it is important to produce molecules which are more biologically active. It is known that heterocycles are bioactive, and that fluorine can enhance this activity. With this aim in mind, we have taken an interest in the development of heteroaromatic building blocks bearing diversely fluorinated substituents in order to provide new options for the preparation of bioactive compounds. Three projects have resulted in the opening of new synthetic routes towards pyridines bearing trifluoromethoxy, chlorodifluoromethoxy and dichlorofluoromethoxy substituents. A regioselective method for the preparation of 3,5-bis(fluoroalkyl) pyrazoles has also been developed. All these routes have been studied with the aim of obtaining the building blocks in a few steps from commercially available products and are transposable to an industrial scale.</dcterms:abstract>
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