Journal
CHEMICAL COMMUNICATIONS
Volume 54, Issue 91, Pages 12867-12870Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8cc07530a
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Funding
- French Agence Nationale de la Recherche (AAP JCJC 2015) [ANR-15-CE18-0015-01]
- SuCarB
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In order to explore the different mechanisms possibly occurring in the Au-catalysed cross-coupling of ArN2BF4 and ArB(OH)(2) in the presence of CsF, various stoichiometric experiments were performed on gold complexes with (P,N) ligands. Employing 2-pyridylphenyl-diphenylphosphine allowed us to suggest three different mechanistic pathways, starting either with a transmetallation step, via two consecutive single electron transfers, or by implying a transmetallation between Au(i) and Au(iii) species. Moreover, when using commercially available chiral (P,N) ligands, the asymmetric formation of atropoisomeric biaryls from suitable aryldiazonium salts and arylboronic acids could be achieved with e.e. up to 26%.
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