An Original L-shape, Tunable N-Heterocyclic Carbene Platform for Efficient Gold(I) Catalysis

International audience 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 heterocycle is described as well as their use as tunable ligands for efficient gold-catalyzed C−N, C−O, and C−C bond...

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Bibliographic Details
Published in:Angewandte Chemie International Edition
Main Authors: Tang, Yue, Benaissa, Idir, Huynh, Mathieu, Vendier, Laure, Lugan, Noël, Bastin, Stéphanie, Belmont, Philippe, César, Vincent, Michelet, Véronique
Other Authors: Ecole Nationale Supérieure de Chimie de Paris - Chimie ParisTech-PSL (ENSCP), Université Paris sciences et lettres (PSL), Institut de Chimie de Nice (ICN), Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA)-Université Nice Sophia Antipolis (. - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA), Laboratoire de chimie de coordination (LCC), Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie de Toulouse (ICT-FR 2599), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Université Paris Descartes - Faculté de Pharmacie de Paris (UPD5 Pharmacie), Université Paris Descartes - Paris 5 (UPD5), CNRS, Université Côte d'Azur, ANR-16-CE07-0006,GOLDWAR,Catalyse asymétrique en présence de complexes d'or(I) et d'or(III) – Un nouvel arsenal pour la construction d'architectures moléculaires chirales(2016)
Format: Article in Journal/Newspaper
Language:English
Published: HAL CCSD 2019
Subjects:
IPY
Online Access:https://hal.archives-ouvertes.fr/hal-02335228
https://hal.archives-ouvertes.fr/hal-02335228/document
https://hal.archives-ouvertes.fr/hal-02335228/file/Angew%20Chem%20int%20Ed,%202019,%2058,%207977.pdf
https://doi.org/10.1002/anie.201901090
Description
Summary:International audience 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 heterocycle is described as well as their use as tunable ligands for efficient gold-catalyzed C−N, C−O, and C−C bond formations. High activity, regio-, chemo-, and stereoselectivities are obtained for hydroelementation and domino processes, underlining the excellent performance (TONs and TOFs) of these IPy-based ligands in gold catalysis. The gold-catalyzed domino reactions of 1,6-enynes give rise to functionalized heterocycles in excellent isolated yields under mild conditions. The efficiency of the NHC gold 5Me complex is remarkable and mostly arises from a combination of steric protection and stabilization of the cationic AuI active species by ligand 1Me.