WorldCat Identities

Sortais, Jean-Baptiste (1979-....).

Overview
Works: 9 works in 11 publications in 2 languages and 11 library holdings
Roles: Other, Opponent, Thesis advisor, Author, Publishing director
Publication Timeline
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Most widely held works by Jean-Baptiste Sortais
Earth-abundant metal complexes for catalyzed hydroelementation by Jianxia Zheng( Book )

2 editions published in 2014 in French and English and held by 2 WorldCat member libraries worldwide

This research work deals with the use of the catalysts based on the earth-abundant transition metals of the first row of the periodic table, such as Mn, Fe, and Ni, for hydroelementation reactions. First of all, the hydrosilylation of aldehydes and ketones was accomplished using a simple Ni(OAc)₂ 4H₂O/PCy₃ catalytic system with the inexpensive and stable silane PMHS as the hydride source. The reductive amination of aldehydes with amines was also achieved with the same catalytic system and TMDS, as the silane. Second, the efficiency of manganese half-sandwich complex CpMn(CO)₂(IMes) was exemplified for the reduction of aldehydes and ketones in the presence of Ph ₂ SiH ₂ (1.5 equiv.) under UV irradiation at room temperature. Still with manganese, the challenging transformation of carboxylic acids to aldehydes was performed using commercial Mn₂ (CO)₁₀ and Et₃SiH. Third, the methylation of the secondary amines with dimethyl carbonate as an alternative and safe C1 source was demonstrated under mild conditions with [CpFe(CO)₂(IMes)]I as the catalyst. Then, the hydroboration of functionalized alkenes and alkynes was catalyzed by an iron(0) carbonyl complex Fe(CO)₄(IMes) under UV irradiation. Finally, the hydroboration reaction was successfully extended to the reduction of CO₂ to methoxyboranes with Fe(CO)₃[P(OPh)₃]₂ as the catalyst and the borane sources, such as HBpin, HBcat or 9-BBN
Complexes cycloruthénés des complexes aux catalyseurs énantiosélectifs by Jean-Baptiste Sortais( Book )

2 editions published in 2007 in French and held by 2 WorldCat member libraries worldwide

Manganese catalysis in organic synthesis( )

1 edition published in 2021 in English and held by 1 WorldCat member library worldwide

Développement de nouvelles plateformes polyols halogénés et étude de leurs propriétés supramoléculaires by Céline Sperandio( )

1 edition published in 2019 in French and held by 1 WorldCat member library worldwide

Dans un monde où les préoccupations environnementales sont de plus en plus présentes, il paraît primordial de mettre en place de nouvelles méthodologies de synthèse plus éco-compatibles. Cela constitue un moteur fondamental pour la conception de nouveaux objets moléculaires possédant des propriétés innovantes, conduisant à la conception de nouveaux matériaux, médicaments ou procédés chimiques. Dans la Nature, les polyols se révèlent comme étant des motifs essentiels pour expliquer l'activité biologique de nombreux produits naturels ou médicaments. Durant cette thèse, nous nous sommes attachés à préparer toute une gamme de polyols halogénés afin d'étudier l'influence de l'halogénation sur les propriétés supramoléculaires de ces molécules. La première partie de ces travaux a porté sur la synthèse énantiosélective de polyols comportant deux motifs halogénohydrines. Nous avons ensuite identifié l'importance de ce motif, permettant une augmentation notable des propriétés de reconnaissance supramoléculaire par établissement de réseaux de liaisons hydrogène. Ces nouveaux polyols se sont avérés être d'excellentes plateformes pour la coordination d'anions, pour la catalyse mais aussi pour la conception de matériaux non-covalents de type organogels. Dans la seconde partie, ces propriétés ont été renforcées via l'insertion de chaînes perfluorées. Ceci a été rendu possible grâce au développement d'une nouvelle réaction d'aldolisation bidirectionnelle énantiosélective catalysée au cuivre conduisant à des 1,3,5-triols perfluorés. Ces nouveaux polyols se sont révélés particulièrement efficaces pour la coordination sélective d'anions, notamment d'anions chiraux
Catalyseurs à base de ligands carbène N-hétérocycliques dérivés de fer et de nickel pour les réactions catalytiques d'hydrosilylation et d'hydroboration by Linus Paulin Bheeter( Book )

1 edition published in 2014 in English and held by 1 WorldCat member library worldwide

Ces travaux de thèse portent sur le développement de catalyseurs à base de ligands carbène N-hétérocycliques dérivés de fer et de nickel, deux métaux de transition abondants, pour les réactions de hydrosilylation et de borylation. Le premier chapitre porte sur les travaux réalisés à l'aide de complexes de fer du type [Cp(NHC)Fe(CO)₂][X] (X = I, PF₆) possédant des ligands de type benzimidazole ou imidazole et leur évaluation en hydrosilylation de dérivés carbonylés. Le deuxième chapitre traite de l'utilisation de complexes demi-sandwichs de nickel du type CpNi(NHC) en hydrosilylation d'aldéhydes, de cétones, d'aldimines et de cétimines. Enfin le troisième chapitre est consacré à la réaction de borylation catalysée par des complexes de nickel demi-sandwich CpNi(triazole)X et des complexes de nickel possédant deux ligands chélatants anioniques de type carbene N-hétérocyclique fonctionnalisé par un bras amido
Iridium(III) silylene complexes : trapping, reactivity and applications by Binh Dang Ho( )

1 edition published in 2019 in English and held by 1 WorldCat member library worldwide

The scope of this thesis spans the most recent advances in the investigation of chemical bonds of iridium-silicon complexes, in which a metal-bound silyl group behaves as a Z ligand that maintains a dative bond with the metal centre. This contrasts greatly with the case where this group behaves like an X ligand, that is where this silyl group binds to Ir through a covalent bond. Finally, and most interestingly are silylene ligands that in principle should establish a double bond with the Ir centre. The idea of evaluating and tuning the electrophilic character of the silyl moiety and adjuncts its “silylicity” was probed by experimental and theoretical means. To conduct that scheme, a broad range of metal-silane adducts and other metal-silyl complexes were investigated by the computation of metal-silyl interaction energies to outline the established tools that rationalize the bonding relationship that exists between the metal center and a SiR3 moiety. Also, this research revealed a clear separation between cases in which the Z character of the silyl moiety is the best description, and cases that belong to “classical” situations in which the X character dominates. Moreover, we postulated that for metal-silane adducts that possess a low intrinsic silylicity, a high “silylicity” can be triggered by ligand replacement or by changing in the charge of the complex.While working on this topic, we discovered that in the presence of tetrahydrofuran (THF), [(Ir-H)→SiRH2]+ adducts readily convert by H2 gas elimination at sub-ambient temperature into new THF-stabilized metallacyclic Ir(III)-"silylene" complexes. The emergence of metal silylene complexes via sequential H-Si activations followed by the spontaneous release of H2 featured in this thesis is unique. The primary goal of this thesis finally was to fully characterize those elusive complexes by NMR spectroscopy analyses and X-ray diffraction analysis. Furthermore, theoretical investigations (static DFT-D reaction-energy profiling, ETS-NOCV) and NMR kinetic studies were utilized to demonstrate the role of THF which facilitated H2 elimination. Coupled with silylene metal complex chemistry mentioned above, cationic iridacycle 1b is of interesting catalytic reactivity toward nitro arenes, which can perform the nitro reduction in arenes to give aniline type products.In crafting a new development of this chemistry, it is safe to hypothesize that cationic hydrido-Ir(III)-silylium species, whose catalytic reactivity is of significant correlation with the extend of polarization of the molecule can enhance in the key intermediates the molecule polarization, and therefore increase its catalytic reactivity. Such polarization that occurs already in the Ir-silane adduct stems from the electropositivity of Si centre. Keeping the main ligand backbone constant, introduction of a fluoro substituent can improve the polarization of the same molecule and by way of consequence increase its catalytic reactivity.As expected, F-1a also displays remarkable catalytic reactivity toward a benchmark test reaction that can be followed by piezometry, i.e. the O-dehydrosilylation of alcohols at room temperature with Et3SiH. A hydrido-Ir(III)-silylium intermediate crystal was trapped as well following on a reaction with Et2SiH. In conclusion, based on the discovery of hydrido-Ir(III)-silylium intermediates associated with a comprehensive study of their reactivity and catalytic performance, this thesis has taken steps to advance knowledge of Ir-silicon complexes by synthesis and the full structural characterization of notoriously elusive metal silylene complexes. Also, sophisticated computational methods have been employed to shed light on the mechanism of conversion of Ir-silane adducts into silylenes of which a great number were trapped by reactive recrystallization and subsequently characterized by X-ray diffraction analysis
Nouveaux procédés catalytiques pour le recyclage de déchets ligno-cellulosiques, de polymères et de dérivés du CO₂ by Elias Feghali( )

1 edition published in 2015 in French and held by 1 WorldCat member library worldwide

 
Audience Level
0
Audience Level
1
  General Special  
Audience level: 0.94 (from 0.89 for Earth-abun ... to 0.99 for Complexes ...)

Alternative Names
Jean-Baptiste Sortais onderzoeker

Jean-Baptiste Sortais researcher

Languages