Alternative Calvin Cycle : chemo-enzymatic cascade for the conversion of carbon dioxide into carbohydrates and derivatives / Desmons, Sarah  

Public ISBD Titre : Alternative Calvin Cycle : chemo-enzymatic cascade for the conversion of carbon dioxide into carbohydrates and derivatives Type de document : texte imprimé Auteurs : Desmons, Sarah, Auteur ; Sebastien Bontemps, Directeur de thèse ; Dumon, Claire, Directeur de thèse Langues : Anglais (eng) Tags : CARBON DIOXIDE  SUGARS  CHEMO-ENZYMATIC CASCADE  FORMALDEHYDE  CHIRALITY Résumé : "The manuscript presents the conversion of carbon dioxide into C3 and C4 carbohydrates using stereocontrolled chemo-enzymatic cascade reactions. The process relies on a two-step strategy with (i) the catalytic and selective 4-electron reduction of CO2 into a bis(boryl)acetal derivative followed by (ii) the stereocontrolled bio-catalyzed C-C coupling of the bis(boryl)acetal derivative into carbohydrates. The strategy developed is unprecedented and represents a new exciting approach for the use of CO2 as a Cn source for the synthesis of valuable industrially relevant enantiomerically pure biomolecules. The first chapter is a bibliographic study describing (i) an introduction to carbohydrate chemistry with a special focus dedicated to the production of carbohydrates from CO2 and formaldehyde as C1 sources and (ii) the selective and catalytic four-electron reduction of CO2 using hydroborane and hydrosilane as reductants for the formation of bis(boryl)acetal and bis(silyl)acetal derivatives and their use as formaldehyde sources or formaldehyde surrogates for the synthesis of value-added product. The second chapter presents the synthesis and reactivity of bis(boryl)acetal and bis(silyl)acetal derivatives. Notably, a new isolable bis(boryl)acetal derivative was successfully synthesized and isolated on a gram scale. The third chapter describes the stereocontrolled bioconversion of the bis(boryl)acetal derivative synthetized from CO2 into carbohydrates. Notably, an enzymatic cascade reaction was performed for the production of an enantiomerically pure C4 carbohydrate using CO2 as the only carbon source." Document : Thèse de Doctorat Etablissement_delivrance : Université de Toulouse 3 Date_soutenance : 15/12/2020 Ecole_doctorale : Sciences de la matière (SDM) Domaine : Chimie organométallique et de coordination Localisation : LCC En ligne : http://thesesups.ups-tlse.fr/4822/ Alternative Calvin Cycle : chemo-enzymatic cascade for the conversion of carbon dioxide into carbohydrates and derivatives [texte imprimé] / Desmons, Sarah, Auteur ; Sebastien Bontemps, Directeur de thèse ; Dumon, Claire, Directeur de thèse . - [s.d.]. Langues : Anglais (eng) Tags : CARBON DIOXIDE  SUGARS  CHEMO-ENZYMATIC CASCADE  FORMALDEHYDE  CHIRALITY Résumé : "The manuscript presents the conversion of carbon dioxide into C3 and C4 carbohydrates using stereocontrolled chemo-enzymatic cascade reactions. The process relies on a two-step strategy with (i) the catalytic and selective 4-electron reduction of CO2 into a bis(boryl)acetal derivative followed by (ii) the stereocontrolled bio-catalyzed C-C coupling of the bis(boryl)acetal derivative into carbohydrates. The strategy developed is unprecedented and represents a new exciting approach for the use of CO2 as a Cn source for the synthesis of valuable industrially relevant enantiomerically pure biomolecules. The first chapter is a bibliographic study describing (i) an introduction to carbohydrate chemistry with a special focus dedicated to the production of carbohydrates from CO2 and formaldehyde as C1 sources and (ii) the selective and catalytic four-electron reduction of CO2 using hydroborane and hydrosilane as reductants for the formation of bis(boryl)acetal and bis(silyl)acetal derivatives and their use as formaldehyde sources or formaldehyde surrogates for the synthesis of value-added product. The second chapter presents the synthesis and reactivity of bis(boryl)acetal and bis(silyl)acetal derivatives. Notably, a new isolable bis(boryl)acetal derivative was successfully synthesized and isolated on a gram scale. The third chapter describes the stereocontrolled bioconversion of the bis(boryl)acetal derivative synthetized from CO2 into carbohydrates. Notably, an enzymatic cascade reaction was performed for the production of an enantiomerically pure C4 carbohydrate using CO2 as the only carbon source." Document : Thèse de Doctorat Etablissement_delivrance : Université de Toulouse 3 Date_soutenance : 15/12/2020 Ecole_doctorale : Sciences de la matière (SDM) Domaine : Chimie organométallique et de coordination Localisation : LCC En ligne : http://thesesups.ups-tlse.fr/4822/

Etude des couplages électro-thermo-mécaniques dans des films composites combinant le polymère ferroélectrique P(VDF-TrFE) avec des nanoparticules à transition de spin / Desmons, Sarah  

Public ISBD Titre : Etude des couplages électro-thermo-mécaniques dans des films composites combinant le polymère ferroélectrique P(VDF-TrFE) avec des nanoparticules à transition de spin Type de document : texte imprimé Auteurs : Desmons, Sarah ; Sebastien Bontemps, Directeur de thèse ; Dumon, Claire, Directeur de thèse Année de publication : 2020 Langues : Français (fre) Document : Thèse de doctorat Etablissement_delivrance : Université de Toulouse Date_soutenance : 15/09/2020 Localisation : LCC En ligne : http://thesesups.ups-tlse.fr/4822/ Etude des couplages électro-thermo-mécaniques dans des films composites combinant le polymère ferroélectrique P(VDF-TrFE) avec des nanoparticules à transition de spin [texte imprimé] / Desmons, Sarah ; Sebastien Bontemps, Directeur de thèse ; Dumon, Claire, Directeur de thèse . - 2020. Langues : Français (fre) Document : Thèse de doctorat Etablissement_delivrance : Université de Toulouse Date_soutenance : 15/09/2020 Localisation : LCC En ligne : http://thesesups.ups-tlse.fr/4822/

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