Catalytic cross deoxygenative and dehydrogenative coupling of aldehydes and alkenes: a redox-neutral process to produce skipped dienes.

A novel catalytic cross deoxygenative and dehydrogenative coupling reaction of aldehydes and alkenes was established via a cooperative catalysis approach. This transformation provided an efficient and atom-economic protocol for the synthesis of 1,4-skipped dienes from aldehydes and simple alkenes under oxidant-free reaction conditions.