Umpolung of π-allylpalladium complexes

الملخص EN

It is widely accepted that π-allylpalladium complexes (η3-allylPdX, X = halides, OAc, OCOOR,…etc) act as an electrophile in nature allowing the attack of various nucleophiles (Nu-) leading to the formation of the allylated products (allyl-Nu).

However, in the presence of a reductant, the electrophilic reactivity of π-allylpalladium complexes is converted to nucleophilic one ; referred as umpolung.

In this review, the recent progress made in the palladium-catalyzed umpolung of π-allylpalladium complexes is described.