CAO, Zhen; SCALABRE, Antoine; NLATE, Sylvain; BUFFIERE, Sonia; ODA, Reiko; POUGET, Emilie; BIBAL, Brigitte

doi:10.1002/chem.202004251

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CAO, Zhen
Institut des Sciences Moléculaires [ISM]

SCALABRE, Antoine
Chimie et Biologie des Membranes et des Nanoobjets [CBMN]

NLATE, Sylvain
Chimie et Biologie des Membranes et des Nanoobjets [CBMN]

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Ce document a été publié dans

Chemistry - A European Journal. 2021, vol. 27, n° 1, p. 427-433

Wiley-VCH Verlag

Résumé en anglais

The combination of metal catalyst and inorganic silica frameworks provides a greener approach to recyclable catalysis. In this study, three phosphine–gold chloride complexes have been successfully covalently grafted onto chiral silica nanohelices. The resulting 3D ensembles showed chiroptical properties that allowed the monitoring of the supported ligands. The heterogeneous gold chloride catalysts in cooperation with silver triflate exhibited high reactivity in various reactions, especially in the spirocyclization of aryl alkynoate esters, for which a catalytic loading of 0.05 mol % could be employed. The heterogeneous catalysts could be easily recovered and recycled seven or eight times without any loss of efficiency. By adding more silver triflate, 25 cycles with full conversion were achieved owing to a complex catalytic system based on silica and metallic species.< Réduire

DOI

http://dx.doi.org/10.1002/chem.202004251

Project ANR

L'effet mâle chez les ongulés: applications agronomiques et mécanismes neuroendocriniens - ANR-11-ISV7-0001

Origine

Importé de hal

Unités de recherche

Institut de Chimie de la Matière Condensée de Bordeaux (ICMCB) - UMR 5026