Suzuki−Miyaura Coupling of NHC−Boranes: A New Addition to the C−C Coupling Toolbox
作者:Julien Monot、Malika Makhlouf Brahmi、Shau-Hua Ueng、Carine Robert、Marine Desage-El Murr、Dennis P. Curran、Max Malacria、Louis Fensterbank、Emmanuel Lacôte
DOI:10.1021/ol902012c
日期:2009.11.5
Complexes of triaryl- and trialkylboranes with N-heterocyclic carbenes (NHCs) participate in Suzuki-Miyaura cross-coupling reactions and provide coupled products in good yields under base-free conditions. The reaction can be applied to CSp(2)-CSp(2) and Csp(2)-Csp(2) carbon-carbon bond formation with triflates, iodides, bromides, and chlorides. These results enrich the utility of NHC-borane complexes, which can be added to the toolkit of Suzuki-Miyaura cross-couplings, along with boronic acids and organotrifluoroborates.