作者:Roly J. Armstrong、Wasim M. Akhtar、Tom A. Young、Fernanda Duarte、Timothy J. Donohoe
DOI:10.1002/anie.201907514
日期:2019.9.2
Hydrogen borrowing catalysis serves as a powerful alternative to enolate alkylation, enabling the direct coupling of ketones with unactivated alcohols. However, to date, methods that enable control over the absolute stereochemical outcome of such a process have remained elusive. Here we report a catalytic asymmetric method for the synthesis of enantioenriched cyclohexanes from 1,5‐diols via hydrogen
氢借位催化是烯醇化烷基化的有力替代方法,可将酮与未活化的醇直接偶联。然而,迄今为止,仍无法控制这种方法的绝对立体化学结果的方法。在这里,我们报告了一种通过氢借位催化从1,5-二醇合成对映体富集的环己烷的催化不对称方法。该反应是通过添加手性铱(I)络合物来介导的,该络合物能够在该过程中赋予高水平的对映选择性。已经制备了一系列对映体富集的环己烷,并且通过结合实验和DFT研究探索了对映体诱导的模式。