Non-heme manganese complexes of C1-symmetric N4 ligands: Synthesis, characterization and asymmetric epoxidations of α,β-enones

A series of proline-derived C1-symmetric chiral tetradentate N ligands and their manganese complexes have been synthesized and characterized. Their applications in enantioselective epoxidations of α,β-enones were explored reaching good yields and up to 71% ee at room temperature.