Highly Active Oligomeric (salen)Co Catalysts for Asymmetric Epoxide Ring-Opening Reactions
作者:Joseph M. Ready、Eric N. Jacobsen
DOI:10.1021/ja005867b
日期:2001.3.1
nucleophile. In this mechanistic context, complexes that contain multiple metal centers in appropriate relative proximity and orientation can provide improved reactivity relative to monometallic catalysts. For example, chiral metal salencomplexes such as 1 are effective catalysts for asymmetric epoxide ringopening reactions, and operate by a second-order mechanism.2 Linking these catalysts as dimers3 or to