Dr. Noam Levi and Prof. Ronny Neumann Manganese Salen Compounds Embedded within Cross-Linked Chiral Polyethylenimine: Asymmetric Epoxidation in an Aqueous Biphasic Medium ChemPlusChem 77
Chiral cross-linked polyethylenimines were used to intercalate MnIII salen catalysts, thereby inducing a chiral environment upon an achiral metal complex. The synzyme, dispersed in water, catalyzes the aqueous biphasic asymmetric epoxidation of styrene derivatives (see structure; L=Cl, OAc, R=isopropyl, phenyl). In the presence of the chiral catalyst there is a significant synergistic effect that increases the enantioselectivity of epoxidation.
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