Palladium-Catalyzed Difunctionalization of Enol Ethers to Amino Acetals with Aminals and Alcohols

A new strategy was developed for intercepting the palladium alkyl species generated in Heck reaction via nucleophilic addition prior to the step of migratory insertion, which leads to a new palladium-catalyzed difunctionalization of enol ethers with aminals and alcohols to afford amino acetals. Mechanistic studies suggested that the cationic cyclometalated Pd(II) complex generated by the oxidative addition of aminal to a Pd(0) species was crucial for this unusual transformation.