(a) The difficulty of asymmetric induction. (b) Kong and his collaborators successfully achieved the stereodivergent construction of oxindoles containing 1,3-nonadjacent stereocenters. (c) Four stereoisomers were prepared from the same substrate using four different chiral ligands. (d) Mechanistic study with or without MgCl₂. (e) DFT calculations for the origin of diastereoselectivity in the presence of MgCl₂ (1 kcal = 4.18 kJ)