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Cyclooctadiene Rh(I) Bis- and Tris(pyrazolyl)aluminate Complexes and Their Catalytic Activity on the Polymerization of Phenylacetylene

https://doi.org/10.1021/acs.inorgchem.1c01434

Garcia, Omar J. ; Vendier, Laure ; Etienne, Michel ; Gwaltney, Steven ; Ressler, Abigail ; Muñoz-Hernández, Miguel-Ángel ( July 2021 , Inorganic Chemistry)
null (Ed.)
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Synthesis and Properties of Partially Saturated Fluorenyl‐Derived [ n ]Helicenes Featuring an Overcrowded Alkene

https://doi.org/10.1002/chem.202100150

Pallova, Lenka ; Gauthier, Etienne S. ; Abella, Laura ; Jean, Marion ; Vanthuyne, Nicolas ; Dorcet, Vincent ; Vendier, Laure ; Autschbach, Jochen ; Crassous, Jeanne ; Bastin, Stéphanie ; et al ( May 2021 , Chemistry – A European Journal)
null (Ed.)
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Helical Chiral N‐Heterocyclic Carbene Ligands in Enantioselective Gold Catalysis

https://doi.org/10.1002/chem.202200166

Pallova, Lenka ; Abella, Laura ; Jean, Marion ; Vanthuyne, Nicolas ; Barthes, Cécile ; Vendier, Laure ; Autschbach, Jochen ; Crassous, Jeanne ; Bastin, Stéphanie ; César, Vincent ( February 2022 , Chemistry – A European Journal)

Abstract
The first chiral helicene‐NHC gold(I) complexes efficient in enantioselective catalysis were prepared. The L‐shaped chiral ligand is composed of an imidazo[1,5‐a]pyridin‐3‐ylidene (IPy) scaffold laterally substituted by a configurationally stable [5]‐helicenoid unit. The chiral information was introduced in a key post‐functionalization step of a NHC‐gold(I) complex bearing a symmetrical anionic fluoreno[5]helicene substituent, leading to a racemic mixture of complexes featuring three correlated elements of chirality, namely central, axial and helical chirality. After HPLC enantiomeric resolution, X‐ray crystallography and theoretical calculations enabled structural and stereochemical characterization of these configurationally stable NHC‐gold(I) complexes. The high potential in asymmetric catalysis is demonstrated in the benchmark cycloisomerization of N‐tethered 1,6‐enynes with up to 95 : 5 er.

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