Publisher： John Wiley & Sons Inc
E-ISSN： 1521-3773|54|17|5210-5213
ISSN： 1433-7851
Source： ANGEWANDTE CHEMIE INTERNATIONAL EDITION, Vol.54, Iss.17, 2015-04, pp. : 5210-5213
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Abstract
AbstractPresented herein is a redox tuning strategy for asymmetric aminocatalysis with a designed chiral ferrocenophane. Under redox control, the ferrocenophane catalyst efficiently catalyzes the asymmetric aldol reaction at room temperature with excellent yield and good stereoselectivity. Moreover, the redox‐active ferrocene moiety also served as phase‐tag to facilitate catalyst recovery and reuse. The catalyst can be reused for five cycles without much loss of activity. Ferrocenium of the oxidized ferrocenophane was proposed to serve as Lewis acidic site, thus accounting for the stereo control.
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