Versatile Cu(I)/Pd(0) dual catalysis for the synthesis of quaternary α-allylated carbonyl compounds: development, mechanistic investigations and scope.

We report herein a versatile cooperative dual catalysis reaction based on a Cu(I)/Pd(0) system. Mechanistic investigation shows that every component plays a crucial role in determining the reaction outcome. The reaction is successfully extended to various substrates; such as α,β-unsaturated ketones, malonates and coumarins. The strategy tolerates different substitution patterns and affords good yields for each family of substrates.