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<dc:title xml:lang="fr">Bromanes/Chloranes (cycliques) lambda3-biaryliques : composes hypervalents rares pour la synthese rapide de molecules complexes</dc:title>
<dcterms:alternative xml:lang="en">(Cyclic) diaryl λ3-bromanes/chloranes : rare hypervalent compounds for the rapid synthesis of complex molecules</dcterms:alternative>
<dc:subject xml:lang="fr">Chimie des arynes</dc:subject>
<dc:subject xml:lang="fr">Λ3-bromanes (cyliques) diaryliques</dc:subject>
<dc:subject xml:lang="fr">Λ3-chloranes (cyliques) diaryliques</dc:subject>
<dc:subject xml:lang="fr">Insertion d'arynes dans les liaisons σ N–Si</dc:subject>
<dc:subject xml:lang="fr">Molécules silacycliques</dc:subject>
<dc:subject xml:lang="fr">Réactions de couplage via des intermédiaires aryne</dc:subject>
<dc:subject xml:lang="en">Aryne chemistry</dc:subject>
<dc:subject xml:lang="en">(cyclic) diaryl λ3-bromanes</dc:subject>
<dc:subject xml:lang="en">(cyclic) diaryl λ3-chloranes</dc:subject>
<dc:subject xml:lang="en">Coupling reactions via aryne intermediates</dc:subject>
<dc:subject xml:lang="en">Aryne insertion into N–Si σ-bonds</dc:subject>
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<dcterms:abstract xml:lang="fr">Contrairement aux λ3-iodanes diaryliques bien étudiés, la chimie des dérivés λ3-bromane et λ3-chlorane a été rarement explorée en raison de leur synthèse complexe, occultant ainsi les applications potentielles. Nous nous sommes concentrés sur le développement de méthodes de synthèse efficaces pour les λ3-bromanes/chloranes (cyliques) diaryliques, ainsi que sur l'exploration de leur potentiel unique en tant que précurseurs d'arynes novateurs et leur réactivité en tant que réactifs efficace d’arylation. Les intermédiaires aryne, générés à partir de λ3-bromanes/chloranes, ont servi de plateformes synthétiques puissantes et durables pour la construction efficace de structures moléculaires complexes. De plus, l’insertion d'arynes dans les liaisons σ N–Si d’aminosilanes avec des réactifs λ3-bromanes/chloranes (cyliques) diaryliques a permis un accès direct à des dérivés 3-amino-2-silylbiaryls. Des investigations expérimentales mécanistiques, combinées à des calculs DFT, ont été menées pour élucider la réactivité distincte et améliorée des réactifs (cyliques) diaryliques de brome(III) et de chlore(III) dans transformations chimiques.</dcterms:abstract>
<dcterms:abstract xml:lang="en">In contrast to well-studied diaryl λ3-iodanes, the chemistry of λ3-bromane and λ3-chlorane congeners has been scarcely explored due to their challenging synthesis, shadowing their potential applications. For this purpose, we focused on developing the practical and efficient synthetic methods for (cyclic) diaryl λ3-bromanes/chloranes, as well as exploring their unique as novel aryne precursors and superior reactivity as enhanced arylating reagents. The aryne intermediates, generated from (cyclic) diaryl λ3-bromanes/chloranes, served as a potent and sustainable synthetic platforms for a straightforward and efficient construction of complex molecular frameworks. In addition, aryne insertion into N–Si σ-bonds of aminosilanes with cyclic diaryl λ3-bromane/chlorane reagents enabled a direct access to 3-amino-2-silylbiaryl derivatives. Experimental mechanistic investigations, combined with DFT calculations, were further conducted to elucidate the distinct and enhanced reactivity of the rarely explored (cyclic) diaryl hypervalent bromine(III) and chlorine(III) reagents in diverse and versatile chemical transformations.</dcterms:abstract>
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