Asymmetric Borane Reduction of Prochiral Ketones Catalyzed By Helical Poly[(S)‐3‐vinyl‐2,2'‐dihydroxy‐1,1'‐binaphthyl]

2015 
The application of helical poly[(S)-3-vinyl-2,2'-dihydroxy-1, 1'-binaphthyl] (L*) in the asymmetric borane reduction of prochiral ketones was studied. The results showed that L* had excellent catalytic activity as well as enantioselectivity, giving up to 96% yield and up to 99% enantiomeric excess (ee) of the corresponding secondary alcohol at 25 °C. Moreover, L* can be easily recovered and reused without loss of catalytic activity. Chirality 27:422–424, 2015. © 2015 Wiley Periodicals, Inc.
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