Chiral Borate Esters in Asymmetric Synth
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Dejun Liu; Zixing Shan; Yan Zhou; Xiaojun Wu; Jingui Qin
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Article
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2004
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John Wiley and Sons
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German
β 212 KB
## Abstract Asymmetric catalytic activity of the chiral spiroborate esters **1**β**9** with a O~3~BN framework (see __Fig.β 1__) toward borane reduction of prochiral ketones was examined. In the presence of 0.1β equiv. of a chiral spiroborate ester, prochiral ketones were reduced by 0.6β equiv. of bor