text: One example of nucleophilic abstraction of an α-acyl group is seen when MeOH is added to the following palladium complex.  The mechanism follows a tetrahedral intermediate which results in the methyl ester and the reduced palladium complex shown.
  The following year a similar mechanism was proposed where oxidative addition of an aryl halide followed by migratory CO insertion and is followed by nucleophilic abstraction of the α-acyl by MeOH.  One of the advantages of this intermolecular nucleophilic abstraction is the production of linear acyl derivatives.  The intramolecular attack of these linear acyl derivatives gives rise to cyclic compounds such as lactones or lactams.