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<dc:title xml:lang="fr">Spirocyclisation de céto-sulfonylynamides : vers la synthèse d'azacycles fonctionnalisés</dc:title>
<dcterms:alternative xml:lang="en">Spirocyclization of ketosulfonylynamides : toward the synthesis of functionalized azacycles</dcterms:alternative>
<dc:subject xml:lang="fr">Spirocyclisation</dc:subject>
<dc:subject xml:lang="fr">Céto-sulfonamides</dc:subject>
<dc:subject xml:lang="fr">Céto-ynamides</dc:subject>
<dc:subject xml:lang="fr">Spiro-énamides</dc:subject>
<dc:subject xml:lang="fr">Milieu micellaire aqueux</dc:subject>
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<dc:subject xml:lang="en">Spirocyclization</dc:subject>
<dc:subject xml:lang="en">Keto-sulfonamides</dc:subject>
<dc:subject xml:lang="en">Keto-ynamides</dc:subject>
<dc:subject xml:lang="en">Spiro-enamides</dc:subject>
<dc:subject xml:lang="en">Aqueous micellar media</dc:subject>
<dc:subject xml:lang="en">Tertiary enamides</dc:subject>
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<dcterms:abstract xml:lang="fr">Les travaux décrits dans ce manuscrit de thèse ont porté d'une part sur le développement de nouvelles méthodes de spirocyclisation de céto-ynamides et d'autre part sur la réactivité de spiroénamides tertiaires. Les céto-sulfonamides en présence de bromoalcynes et de carbonate de césium conduisent à la formation de spiro-énamides par réaction de spirocyclisation via un intermédiaire céto-ynamide activé. Une grande variété de cycloalcanones et de bromoalcynes électroattracteurs sont tolérés.Les céto-ynamides conduisent à la formation de dérivés spiro-énamides par traitement avec du Triton B. La spirocyclisation tolère de nombreuses cycloalcanones et différents substituants aryles sur l'ynamide, et opère avec un bon stéréocontrôle de l'énamide. Une version en milieu micellaire aqueux de cette spirocyclisation a également été développée. Deux réactions dominos assistées par l'énamide tertiaire spirocyclique ont ensuite été développées. En présence de tétrachlorure de zirconium, la réaction domino permet d'obtenir des tétracycles de façon diastéréosélective tandis qu'avec le tétrachlorure de titane des pentacycles sont obtenus à partir du spiro-énamide avec un excellent régio- et diastéréocontrôle.</dcterms:abstract>
<dcterms:abstract xml:lang="en">The work described in this manuscript involved the development of new spirocyclization methods starting from keto-ynamides, and the reactivity of tertiary spiro-enamides.Keto-sulfonamides led to spiro-enamides in the presence of cesium carbonate by spirocyclization reaction via an activated keto-ynamide intermediate. A wide range of cycloalkanones and electronwithdrawing bromoalkynes are tolerated. The spirocyclization reaction starting from keto-ynamides afforded spiro-enamide by treatment with Triton B. Various cycloalkanones, as well as a wide range of aryl substituents on the ynamide moiety, were suitable and provided good stereocontrol of the enamide formed. The spirocyclization reaction was also studied in aqueous micellar media. Two domino reactions assisted by the spirocyclic tertiary enamide were next developed. In the presence of zirconium tetrachloride, the domino reaction provided tetracyclic fused ring systems in a diastereoselective manner, whereas in the case of titanium tetrachloride, pentacyclic systems were obtained starting from the spiro-enamide with excellent regio- and diastereocontrol.</dcterms:abstract>
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