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<dc:title xml:lang="fr">Des ynamides pour la synthèse de molécules azotées fluorées inédites</dc:title>
<dcterms:alternative xml:lang="en">Ynamides for the synthesis of novel fluorinated nitrogen molecules</dcterms:alternative>
<dc:subject xml:lang="fr">Ynamides</dc:subject>
<dc:subject xml:lang="fr">N-allènamides</dc:subject>
<dc:subject xml:lang="fr">Ene-ynamides</dc:subject>
<dc:subject xml:lang="fr">Y-sultames fluorés</dc:subject>
<dc:subject xml:lang="fr">Y-lactames fluorés</dc:subject>
<dc:subject xml:lang="fr">Réduction regiosélective</dc:subject>
<dc:subject xml:lang="fr">Énamides</dc:subject>
<dc:subject xml:lang="fr">Allylamides</dc:subject>
<dc:subject xml:lang="en">Ynamides</dc:subject>
<dc:subject xml:lang="en">N-allenamides</dc:subject>
<dc:subject xml:lang="en">Ene-ynamides</dc:subject>
<dc:subject xml:lang="en">Y-fluorinated sultams</dc:subject>
<dc:subject xml:lang="en">Y-fluorinated lactams</dc:subject>
<dc:subject xml:lang="en">Regioselective reduction</dc:subject>
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<dcterms:abstract xml:lang="fr">Ces travaux décrivent l’utilisation d’ynamides et de N-allènamides comme intermédiaires clés pour la synthèse d’hétérocycles azotés et fluorés inédits. Une réaction de cyclisation intramoléculaire de mésyl N-allènamides trifluorométhylés promue par le TBAF a permis la synthèse de y-sultames trifluorométhylés alors que, l’utilisation d’un mélange TBAF/acide acétique, a permis l’obtention de y-sultames gem-difluorés. La formation de diènes trifluorométhylés substitués par une fonction amide, obtenue par une réaction de métathèse d’ène-ynamides avec un aldéhyde, a permis la synthèse de plateformes moléculaires hautement fonctionnalisées. Le traitement de ces diènes par des amines primaires, a permis l’obtention stéréosélective de y-lactames trifluorométhylés à l’aide d’un processus domino d’hydroamination/isomérisation/transamidation. Enfin, la réduction régio- et stéréosélective de chaque double liaison des N-allènamides trifluorométhylés a été explorée. Des allylamides ont été obtenus par réduction de la partie énamide des N-allènamides, alors que des énamides ont été formés par isomérisation, en milieu basique des allylamides.</dcterms:abstract>
<dcterms:abstract xml:lang="en">This work describes the use of ynamides and N-allenamides as key intermediates for the synthesis of novel nitrogen and fluorine containing heterocycles. A TBAF-promoted intramolecular cyclization reaction of trifluoromethylated mesyl N-allenamides led to the synthesis of trifluoromethylated y-sultams, while the use of a TBAF/acetic acid mixture afforded gem-difluorinated y-sultams. The formation of amide-substituted trifluoromethylated dienes, obtained through metathesis of ene-ynamides with an aldehyde, enabled the synthesis of highly functionalized molecular platforms. Treatment of these dienes with primary amines enabled the stereoselective production of trifluoromethylated y-lactams via a domino hydroamination/isomerization/transamidation process. Finally, the regio- and stereoselective reduction of each double bond of trifluoromethylated N-allenamides was explored. Allylamides were obtained by reduction of the enamide part of N-allenamides, while enamides were formed by isomerization, in basic medium of allylamides.</dcterms:abstract>
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