Acylpalladation carbonylation trapping

Type II Cyclic Acylpalladation Type II Ac-Pd) AcylpaUadation-carbonylative trapping with added nucleophiles. 

CO Insertion—Acylpalladation Tandem Processes. In eqs 40 3, it was shown that, even under carbonylation conditions, CO insertion can be deferred in favor of noncarbonylative carbopaUadation that may then be terminated by CO insertion and an appropriate trapping for catalyst regeneration. In this section, those cases in which (i) CO insertion is favored and (ii) the acylpalladium species thus generated can undergo a kind of carbopaUadation termed acylpalladation (vide supra) will be discussed. Systematic investigation by Negishi and his... 

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