Highly efficient metal-free cross-coupling by C-H activation between allylic and active methylenic compounds promoted by DDQ

A metal-free very highly efficient and concise oxidative-coupling reaction promoted by 2,3-dichloro-5,6-dicyanoquinone (DDQ) between diarylallylic Sp(3) C-H and active methylenic Sp(3) C-H bonds is reported. The corresponding products are obtained in good to excellent yields.