Synthesis of Nickel(II) N-Heterocyclic Carbene (NHC) Complexes, Catalyzing Cross-coupling Reactions

摘要

The chemistry of nickel complexes now stands at an important position in useful organic catalytic reactions. Focusing on the versatile nickel catalysts, simple Ni(0) and Ni(II) complexes, such as [Ni(COD)_2], [NiX_2(monophosphine)_2], and [NiX_2(eta~2-bisphosphine)] (X = Cl, Br), have been used in many useful catalytic reactions. Recently, new complexes bearing the N-heterocyclic carbene (NHC) have attracted considerable attention, and these compounds must be more widely exploited as versatile active catalysts in organic synthesis.