Nickel(0)-Catalyzed Isomerization of an Aryne Complex: Formation of a Dinuclear Ni(I) Complex via C-H Rather than C-F Bond Activation

摘要

There has been great interest lately in the ability of transition metal complexes to activate C-H and C-F bonds,both stoichio-metrically and catalytically.These bonds are typically inert,and the products of activation provide synthetic avenues inaccessible by conventional procedures.It has been shown that precursors to nickel bisphosphine fragments,such as (COD)Ni(PEt_3)_2,are highly selective in the activation of C-F over C-H bonds in their reaction with a variety of fluorinated aryl and azaheterocycles.