Enantioselective reduction alkene dihydroxylation

A more versatile method to use organic polymers in enantioselective catalysis is to employ these as catalytic supports for chiral ligands. This approach has been primarily applied in reactions as asymmetric hydrogenation of prochiral alkenes, asymmetric reduction of ketone and 1,2-additions to carbonyl groups. Later work has included additional studies dealing with Lewis acid-catalyzed Diels-Alder reactions, asymmetric epoxidation, and asymmetric dihydroxylation reactions. Enantioselective catalysis using polymer-supported catalysts is covered rather recently in a review by Bergbreiter [257],... [Pg.519]

Control of enantioselectivity will be discussed in the corresponding sections on carbonyl reduction (Chapter 4) alkene hydrogenation, epoxidation, and dihydroxylation (Chapter 5) aldol condensation (Chapter 6) allylation and crotylation (Chapter 7) Claisen rearrangement (Chapter 8) and the Diels-Alder reaction (Chapter 9). [Pg.22]