Organocatalytic Asymmetric Halogenation/Semipinacol Rearrangement: Highly Efficient Synthesis of Chiral α-Oxa-Quaternary β-Haloketones
作者:Zhi-Min Chen、Qing-Wei Zhang、Zhi-Hua Chen、Hui Li、Yong-Qiang Tu、Fu-Min Zhang、Jin-Miao Tian
DOI:10.1021/ja201794v
日期:2011.6.15
A novel asymmetric halogenation/semipinacol rearrangement reaction catalyzed by cinchona alkaloid derivatives was developed. Two types of β-haloketones (X = Br, Cl) were obtained with up to 95% yield and 99% enantiomeric excess. The desired (+) and (-) enantiomers of the β-haloketones were readily obtained.
开发了一种由金鸡纳生物碱衍生物催化的新型不对称卤化/半频哪醇重排反应。以高达 95% 的产率和 99% 的对映体过量获得了两种类型的 β-卤代酮 (X = Br, Cl)。很容易获得所需的 β-卤代酮的 (+) 和 (-) 对映异构体。