reactions of phenols are currently intensively studied. Herein, new copper catalysts for the C−C coupling reaction of phenols using dioxygen as a green oxidizing reagent are reported. By using redox‐activeguanidineligands, the activity as well as chemoselectivity in the cross‐coupling reaction of non‐complementary phenols (between an electron‐rich phenol and a less nucleophilic second phenol) is significantly