I, 2-Migration or migratory insertion is, in principle, one of the most fundamental patterns for carbon-carbon and carbon-hetero atom bond formation. Indeed, the majority of carbon- carbon bond-forming reactions of organoboron compounds proceed via 1, 2-migrati0n.~ Carbonylation and related reactions of organo transition metals are representative examples of the 1, 2-migration reactions involving transition metal^.^ At present, however, relatively ...
