Unusual Reactivity of a Nickel N-Heterocyclic Carbene Complex:tert-Butyl Group Cleavage and Silicone Grease Activation

摘要

During the past decade there has been considerable interest in N-heterocyclic carbene ligands (NHCs),particularly as alternative to phosphanes for both palladium and ruthenium-mediated'2' catalysis of a range of organic transformations.Recently,the use of Ni~(II)/imidazolium salt/base or Ni~0/ NHC combinations for catalytic aminations,in which the active catalyst is believed to be a Ni~0-NHC complex,has also been described.