Search Results - "César, Vincent"

Synthetic Routes to N-Heterocyclic Carbene Precursors by Benhamou, Laure, Chardon, Edith, Lavigne, Guy, Bellemin-Laponnaz, Stéphane, César, Vincent

“…Benhamou et al examine the creation of N-heterocyclic carbenes precursors through the synthesis of azolum salts…”
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Buchwald–Hartwig Amination of (Hetero)Aryl Tosylates Using a Well-Defined N‑Heterocyclic Carbene/Palladium(II) Precatalyst by Zhang, Yin, Lavigne, Guy, César, Vincent

“…The cross-coupling of aryl tosylates with amines and anilines was achieved by using for the first time a Pd-NHC system based on the popular Pd-PEPPSI…”
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NHC Ligands in Organometallic Chemistry and Catalysis by Poyatos, Macarena, César, Vincent

“…Thanks to their appealing properties, N‐Heterocyclic Carbene (NHC) ligands have gained considerable significance as powerful ligands in organometallic…”
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Skeleton Decoration of NHCs by Amino Groups and its Sequential Booster Effect on the Palladium-Catalyzed Buchwald-Hartwig Amination by Zhang, Yin, César, Vincent, Storch, Golo, Lugan, Noël, Lavigne, Guy

“…A challenging synthetic modification of PEPPSI‐type palladium pre‐catalysts consisting of a stepwise incorporation of one and two amino groups onto the NHC…”
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Bis(N‑cyclopropenio)-imidazol-2-ylidene: An N‑Heterocyclic Carbene Bearing Two N‑Cationic Substituents by Padunnappattu, Ajay, Duhayon, Carine, César, Vincent, Canac, Yves

“…Thanks to the onio-substitution strategy, tricationic imidazolium salt (1·H)­(OTf)3 featuring two N-cyclopropenio substituents was readily prepared in a…”
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An Original L‐shape, Tunable N‐Heterocyclic Carbene Platform for Efficient Gold(I) Catalysis by Tang, Yue, Benaissa, Idir, Huynh, Mathieu, Vendier, Laure, Lugan, Noël, Bastin, Stéphanie, Belmont, Philippe, César, Vincent, Michelet, Véronique

“…The synthesis and characterization of original NHC ligands based on an imidazo[1,5‐a]pyridin‐3‐ylidene (IPy) scaffold functionalized with a flanking barbituric…”
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Buttressing Effect as a Key Design Principle towards Highly Efficient Palladium/N‐Heterocyclic Carbene Buchwald–Hartwig Amination Catalysts by Zhang, Yin, Lavigne, Guy, Lugan, Noël, César, Vincent

“…The backbone substitution of the standard 1,3‐bis(2,6‐diisopropylphenyl)‐2H‐imidazol‐2‐ylidene (IPr) ligand by dimethylamino groups was previously shown to…”
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A Cationic N‑Heterocyclic Carbene Containing an Ammonium Moiety by Ruamps, Mirko, Lugan, Noël, César, Vincent

“…The dicationic 4-ammonio-substituted imidazolium salt (2·H)­(OTf)2 is readily obtained from its 4-amino-substituted imidazolium precursor (1·H)­(OTf) by…”
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Efficient and Versatile Buchwald-Hartwig Amination of (Hetero)aryl Chlorides Using the Pd-PEPPSI-IPr(NMe2)2 Precatalyst in the Presence of Carbonate Base by Zhang, Yin, César, Vincent, Lavigne, Guy

“…The precatalyst Pd–PEPPSI‐IPr(NMe2)2, in which the IPr ligand was modified by attachment of two dimethylamino groups on to the 4‐ and 5‐positions of the…”
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A Stable Anionic N-Heterocyclic Carbene and Its Zwitterionic Complexes by César, Vincent, Lugan, Noël, Lavigne, Guy

“…Pyrimidinium betaïnes (1), readily accessible via a straightforward modular synthesis from a formamidine and a monosubstituted malonic acid, are readily…”
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Electronic Tuning of a Carbene Center via Remote Chemical Induction, and Relevant Effects in Catalysis by César, Vincent, Lugan, Noël, Lavigne, Guy

“…The present report develops the idea that an N‐heterocyclic carbene incorporating a remote anionic functionality—here, a malonate group—as a backbone component…”
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Fused Polycyclic NHC Ligands in Gold Catalysis: Recent Advances by Teixeira, Paul, Bastin, Stéphanie, César, Vincent

“…Thanks to their appealing properties, N‐heterocyclic carbene (NHC) ligands gained considerable significance as highly powerful ancillary ligands in gold…”
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Towards (C,C)‐cyclometalated N‐(9‐alkylfluorenyl)NHC Ruthenium Complexes for Z‐selective Olefin Metathesis by Gajda, Katarzyna, Sytniczuk, Adrian, Vendier, Laure, Trzaskowski, Bartosz, Lugan, Noël, Kajetanowicz, Anna, Bastin, Stéphanie, Grela, Karol, César, Vincent

“…Three Hoveyda‐Grubbs complexes supported by N‐(9‐alkylfluorenyl)imidazol‐2‐ylidene ligands (alkyl=methyl, ethyl or benzyl) have been synthesized. With the aim…”
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Facile Derivatization of a “Chemo-active” NHC Incorporating an Enolate Backbone and Relevant Tuning of Its Electronic Properties by Benhamou, Laure, Vujkovic, Nadia, César, Vincent, Gornitzka, Heinz, Lugan, Noël, Lavigne, Guy

“…The present report discloses a modular synthetic route to a new type of anionic N-heterocyclic carbene ligand incorporating an enolate group as a reactive…”
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Helical Chiral N‐Heterocyclic Carbene Ligands in Enantioselective Gold Catalysis by Pallova, Lenka, Abella, Laura, Jean, Marion, Vanthuyne, Nicolas, Barthes, Cécile, Vendier, Laure, Autschbach, Jochen, Crassous, Jeanne, Bastin, Stéphanie, César, Vincent

“…The first chiral helicene‐NHC gold(I) complexes efficient in enantioselective catalysis were prepared. The L‐shaped chiral ligand is composed of an…”
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Bidentate Iminophosphorane-NHC Ligand Derived from the Imidazo[1,5‑a]pyridin-3-ylidene Scaffold by Azouzi, Karim, Duhayon, Carine, Benaissa, Idir, Lugan, Noël, Canac, Yves, Bastin, Stéphanie, César, Vincent

“…The synthesis of the bifunctional iminophosphorane-NHC (1) based on the imidazo­[1,5-a]­pyridin-3-ylidene (IPy) platform is reported. Its…”
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Half‐Sandwich Manganese Complex Bearing Fused Oxazoline‐NHC Ligand: Conformational Analysis and Evaluation in Asymmetric Ketone Hydrosilylation by Cavailles, Matthieu, Filippov, Oleg A., César, Vincent, Lugan, Noël, Valyaev, Dmitry A.

“…The first manganese complex bearing a chiral N‐heterocyclic carbene (NHC) ligand was prepared and studied by spectroscopic methods and X‐ray diffraction. While…”
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An Ambidentate Janus-Type Ligand System Based on Fused Carbene and Imidato Functionalities by Vujkovic, Nadia, César, Vincent, Lugan, Noël, Lavigne, Guy

“…The new anionic heterocycle imidNHC (4,6‐dioxo‐1,3,5‐triazin‐2‐ylidene‐5‐ide), combining a carbene and an anionic imidate, was readily prepared through a…”
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Experimental Assessment of the π‐Acidity of Anionic and Neutral Malonate‐Derived N‐Heterocyclic Carbenes by Ruamps, Mirko, Lugan, Noël, César, Vincent

“…The π‐acidity of anionic malonate‐derived N‐heterocyclic carbenes (maloNHC)–, [1]–, has been determined experimentally by recording the 77Se NMR chemical…”
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Reprogramming of a Malonic N-Heterocyclic Carbene: A Simple Backbone Modification with Dramatic Consequences on the Ligand's Donor Properties by César, Vincent, Lugan, Noël, Lavigne, Guy

“…Reaction of N,N′‐dimesitylformamidine with dimethylmalonyl dichloride in dichloromethane in the presence of an excess of triethylamine gives the…”
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