Immobilization of Dicationic Mn(III) Salen in the Interlayers of Montmorillonite Clay for Enantioselective Epoxidation of Nonfunctionalized Alkenes

Dicationic chiral Mn(III) salen complex (0.4 mol%) immobilized in the interlayer of montmorillonite clay 4A, epoxidize bulkier alkenes (epoxide yield 68–99%) with high chiral induction (up to 95% ee) with a catalyst reusability of up to four cycles.