Asymmetric Hydrogenations of Acyclic α,β-Unsaturated Ketones with Chiral Frustrated Lewis Pairs (FLPs)
作者:Zaiqi Han、Xiangqing Feng、Haifeng Du
DOI:10.1021/acs.joc.3c02031
日期:2023.11.17
In this paper, we demonstrate a metal-free asymmetric hydrogenation of acyclic α,β-unsaturated ketones under the catalysis of a frustratedLewispair (FLP) comprising chiral oxazoline and achiral borane. A wide range of optically active α-substituted ketones were furnished in high yields with 26–85% ee’s.
在本文中,我们展示了在包含手性恶唑啉和非手性硼烷的受挫路易斯对(FLP)的催化下,无环α,β-不饱和酮的无金属不对称氢化。以高产率提供了多种光学活性 α-取代酮,其 ee 为 26-85%。
Stereochemistry of the Transmetalation of Grignard Reagents to Copper (I) and Manganese (II)
作者:Reinhard W. Hoffmann、Bettina Hölzer
DOI:10.1021/ja025638k
日期:2002.4.1
Transmetalation of a chiral secondary Grignard reagent to Cu(I) or Mn(II) occurs with partial racemization in a manner that suggests the sequence of two transmetalation cycles, one with racemization (caused by ET ?) and the other one with (predominant) retention of configuration.
手性二级格氏试剂向 Cu(I) 或 Mn(II) 的金属转移以部分外消旋化的方式发生,这表明了两个金属转移循环的顺序,一个是外消旋化(由 ET 引起),另一个是(主要)配置的保留。