Highly Enantio- and Diastereoselective Organocatalytic Desymmetrization of Prochiral Cyclohexanones by Simple Direct Aldol Reaction Catalyzed by Proline
Panacea for aldoldesymmetrizations: We describe an easy entry for the desymmetrization of 4‐substituted‐cyclohexanonescatalyzed by proline, using as cocatalysts different hydrogen‐bonding donors (see scheme), which dramatically improves the catalytic efficiency of proline in desymmetrizationreactions.