Metal Species Supported on Organic Polymers as Catalysts for the Epoxidation of Alkenes

摘要: Publisher Summary Recent developments in the field of immobilized metal catalysts for liquidphase alkene epoxidation are reviewed. Progress since 2000 is summarized considering organic polymers as supports with a focus on polymer types, catalyst preparation, and performance rather than physicochemical parameters modified polymers. A broad variety metals including manganese, molybdenum, titanium, calcium considered several immobilization strategies described. advances comprise new systems asymmetric heterogeneous or homogeneous epoxidation, polymeric supports, polymer-based high long-term activities range months. By catalytic performances supported manganese complexes salen-type ligands could be improved concepts such Katsuki-type chiral backbones have emerged. In this context, conjugated salen-cross-linked polymers, obtained by condensation trialdehyde diamines presence salt, promising approach toward active, selective, stable multiple use. Sharpless-epoxidation catalysts, discovery enantioreversal function molecular weight polymer-modified tartrate offer control reactions.