A Highly Reduced Ni–Li–Olefin Complex for Catalytic Kumada–Corriu Cross-Couplings

The
catalytic activity of a highly reduced Ni catalyst in the context
of a Kumada–Corriu cross-coupling has been studied. This nickel
complex is characterized by its high electron density, stabilized
by simple olefin ligands in combination with two Li ions. Landmark
reactivity has been found with this precatalyst which operates at
cryogenic temperatures, thus allowing the presence of sensitive functionalities.
Structural elucidation of oxidative addition intermediates and their
reactivity suggest highly reduced species being operative in the C–C
bond forming event.