Effect of borane source on the enantioselectivity in the enantiopure oxazaborolidine-catalyzed asymmetric borane reduction of ketones
作者:Xiao Wang、Juanjuan Du、Han Liu、Da-Ming Du、Jiaxi Xu
DOI:10.1002/hc.20370
日期:2007.11
The effect of borane source on enantioselectivity in the enantiopure oxazaborolidine-catalyzed asymmetric borane reduction of ketones has been investigated by using (S)-3,1,2-oxazaborobicyclo[3.3.0]octane and (S)-7,3,1,2-thiaxazaborobicyclo[3.3.0]octane as catalysts. The results indicate that the enantioselective order of different borane sources is borane–dimethyl sulfide < borane–N,N-diethylaniline
使用 (S)-3,1,2-氧氮杂硼双环 [3.3.0] 辛烷和 (S)-7,3,1 研究了硼烷源对对映体纯氧氮杂硼烷催化不对称硼烷还原酮的对映选择性的影响,2-硫杂氮杂硼双环[3.3.0]辛烷作为催化剂。结果表明,在相同条件下,不同硼烷来源的对映选择性顺序是硼烷-二甲硫醚<硼烷-N,N-二乙基苯胺<硼烷-THF,用于不对称还原酮。© 2007 Wiley Periodicals, Inc. 杂原子化学 18:740–746, 2007; 在线发表于 Wiley InterScience (www.interscience.wiley.com)。DOI 10.1002/hc.20370