Copper-Catalyzed γ-Selective and Stereospecific Allyl-Aryl Coupling between (Z)-Acyclic and Cyclic Allylic Phosphates and Arylboronates

A Cu-catalyzed allyl-aryl coupling reaction between (2)-acyclic or cyclic allylic phosphates and arylboronates proceeds with excellent gamma-E-selectivity and 1,3-anti chirality transfer, which gives the corresponding coupling products with benzylic and allylic stereogenic centers. The wide availability and easy-to-handle nature of arylboronates, the inexpensiveness of the Cu catalyst system, and the high regio- and stereoselectivities are attractive features of this protocol.