摘要
Unfunctionalized olefins are produced on an enormous scale in the petroleum industry.For example,propene and butenes are produced annually on over 100-and 40-million-ton scales.Transition metal catalysis is an attractive approach for the valorization of such chemical feedstocks,which provides value-added building blocks that can be further transformed into pharmaceuticals and functional materials.However,unfunctionalized olefins are relatively inert molecules due to their weak interaction with the metal centers.Accordingly,the functionalization of unactivated olefins has been a long-standing challenge in transition metal catalysis.The use of directing groups has become a universal strategy to overcome the reactivity and selectivity issues[1].Directing groups are strongly binding functionalities that serve to coordinate to the metal center and bring the unactivated moiety closer to the metal.
