Modular 1,2‐Selective Carboarylation of Conjugated Dienes under Cobalt Catalysis

A highly 1,2‐regioselective cobalt‐catalyzed alkylarylation of conjugated dienes in a stereoretentive fashion has been disclosed. Indeed, the anion‐coordination played a critical role for tuning the reactivity of arylzinc pivalates, thereby efficiently steering the cobalt‐catalyzed three‐component coupling reaction via radical relay pathway. Moreover, this protocol also distinguished by its mild conditions, ample substrate scope and good functional group compatibility.