Well-Defined Allylnickel Chloride/N-Heterocyclic Carbene [(NHC)Ni(allyl)Cl] Complexes as Highly Active Precatalysts for C-N and C-S Cross-Coupling Reactions

The room temperature Buchwald-Hartwig animation of heteroaromatic chlorides has been achieved using the sterically bulky allylnickel chloride/N-heterocyclic carbene [(IPr)Ni(allyl)Cl] complex as a well-defined precatalyst. Arylation of aromatic thiols, affording high yields of products under low catalyst loadings, has also been promoted with the same complex.