Introduction . Olefins serve as a sought-after class of feedstocks for chemical synthesis by virtue of their wide existence, availability as well as versatility1 , 2 , 3. The intermolecular difunctionalization of olefins by introducing two fragments across the C=C double bond represents a powerful tool for upgrading the feedstocks into structurally complex and densely functionalized molecules4 , 5 , 6 , 7 , 8 , 9. As an important subset of these transformations,...