Mechanistic explorations on the decarboxylative allylation of amino esters via dual photoredox and palladium catalysis.

Mechanistic studies reveal that the decarboxylative allylation of amino esters via dual photoredox and palladium catalysis occurs via oxidation giving π-allyl-Pd(II) species and carboxylate, which is oxidized by *Ir(III)-catalyst offering benzyl radicals. The alkylated product is formed via an S N 2 pathway. Single-electron transfer between Pd(I)-species and Ir(II)-catalysis restores both catalysts.