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<dc:title xml:lang="fr">Des alcynyl-cétones fonctionnalisées : vers la synthèse de squelettes carbonés originaux</dc:title>
<dcterms:alternative xml:lang="en">Functionalized alkynyl-ketone : toward the synthesis of original carbon skeletons</dcterms:alternative>
<dc:subject xml:lang="fr">Alcynyl-cétones</dc:subject>
<dc:subject xml:lang="fr">Céto-3-alcynoates</dc:subject>
<dc:subject xml:lang="fr">Allénoates bicycliques</dc:subject>
<dc:subject xml:lang="fr">(-)-12-COOH-JA</dc:subject>
<dc:subject xml:lang="fr">(-)-12-COOH-JA-Ile</dc:subject>
<dc:subject xml:lang="fr">Céto-sulfonylynamides</dc:subject>
<dc:subject xml:lang="fr">, aza-bicyclo[n.m.1]alcanones</dc:subject>
<dc:subject xml:lang="fr">Triflimide d'argent</dc:subject>
<dc:subject xml:lang="en">Alkynyl-ketones</dc:subject>
<dc:subject xml:lang="en">Keto-3-alkynoates</dc:subject>
<dc:subject xml:lang="en">Bicyclic allenoate</dc:subject>
<dc:subject xml:lang="en">(-)-12-COOH-JA</dc:subject>
<dc:subject xml:lang="en">(-)-12-COOH-JA-Ile</dc:subject>
<dc:subject xml:lang="en">Keto-sulfonylynamides</dc:subject>
<dc:subject xml:lang="en">Aza-bicyclo[n.m.1]alcanones</dc:subject>
<dc:subject xml:lang="en">Silver triflimide</dc:subject>
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<dcterms:abstract xml:lang="fr">Les travaux décrits dans ce mémoire de thèse ont pour objet d'une part l'étude de la réactivité de céto-3-alcynoates et de céto-sulfonylynamides. Les céto-3-alcynoates conduisent à la formation d'allénoates bi- ou tricycliques par catalyse au carbonate de césium. La sélectivité est totale au niveau de l'allénoate bicyclique obtenu. Il est également possible d'effectuer cette réaction de cyclisation de façon monotope au départ de l'alcynyl-cétone correspondante, dans ce cas les allénoates tricycliques sont obtenus avec de très bons rendements. Les 3-alcynoates peuvent également être utilisés pour la synthèse de dérivés oxydés de l'acide jasmonique. Ainsi deux composés énantiomériquement enrichis, le (-)-12-COOH-JA et le (-)-12-COOH-JA-Ile, observés dans les plantes blessées on été synthétisés. Ces composés ont permis d'élucider deux voies cataboliques : une voie oxydative et une voie hydrolytique. L'étude de la réactivité de céto-sulfonylynamides en présence de triflimide d'argent a conduit à l'obtention d'aza-bicyclo[n.m.1]alcanones. Cette réaction de Conia-ène formelle s'applique à différentes cycloalcanones, ainsi qu’à une grande variété d’ynamides fonctionnalisés</dcterms:abstract>
<dcterms:abstract xml:lang="en">The work described in this manuscript involved the reactivity of keto-3-keto-alkynoates and and keto-sulfonamides. Keto-3-alkynoates led to bi- or tricyclic allenoates in the presence of a catalytic amount of cesium carbonate. Cyclization proceeds in a totally stereoselective manner in the case of the two-carbon linker chain. A one-pot reaction starting from alkynyl ketones afforded tricyclic fused ring systems with good yields. Enantiomerically enriched, oxidized, conjugated or non-conjugated jasmonate derivatives were obtained through 3-alkynoates, in particular (-)-12-COOH-JA and (-)-12-COOH-JA-Ile found in wounded leaves. The availability of those synthetic compounds allowed deeper exploration of the complex regulation of JA-Ile hormone homeostasis and unraveled an oxidative and a hydrolytic pathway. Aza-bicyclo[n.m.1]alkanone frameworks could be obtained when keto-sulfonylynamides were treated under silver catalysis. This formal Conia-ene reaction was compatible with various cycloalkanones, as well as a wide range of functionalized ynamides.</dcterms:abstract>
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