Olefin Epoxidation by a (salen)Mn(III) Catalyst Covalently Grafted on Glass Beads

Olefin Epoxidation by a (salen)Mn(III) Catalyst Covalently Grafted on Glass Beads

The asymmetric epoxidation of unfunctionalized prochiral olefins, catalyzed by chiral (salen)Mn(III) complexes, is an important viable route to obtain chiral epoxides. Recently we proposed a monolayer of (salen)Mn(III) molecules on flat silica functionalized substrates as an active heterogeneous catalyst for enantioselective epoxidation of the 6-cyano-2,2-dimethylchromene with huge turnover values. In the present study we synthesized a monolayer of modified (salen)Mn(III) molecules on previously