Asymmetric Synthesis of Chiral 1,
<scp>3‐Disubstituted</scp>
Allylsilanes
<i>via</i>
Copper(I)‐Catalyzed 1,
<scp>4‐Conjugate</scp>
Silylation of α,
<scp>β‐Unsaturated</scp>
Sulfones and Subsequent
<scp>Julia‐Kocienski</scp>
Olefination
作者:Xian‐Liang Wang、Xing‐Hao Yin、Jun‐Zhao Xiao、Xue‐Shun Jia、Liang Yin
DOI:10.1002/cjoc.202100101
日期:2021.7
array of chiral allylsilanes in moderate yields. More interestingly, a one-pot asymmetric synthesis with high synthetic efficiency is successfully realized. Utility of the prepared chiral 1,3-disubsituted allylsilanes is demonstrated in the asymmetric allylation of both aldehyde and aldimine. Finally, an interesting “match and mismatch” phenomenon is observed in the asymmetric allylation of chiral aldehydes
手性 1,3-二取代烯丙基硅烷的一般合成是通过铜 (I) 催化的 α,β-不饱和砜的不对称 1,4-共轭硅烷化和随后的 Julia-Kocienski 烯化建立的。通过修饰 McQuade 的 NHC 配体,以高对映选择性实现了具有广泛底物范围的催化不对称共轭硅烷化。以下Julia-Kocienski 烯化在室温下顺利进行,以中等产率提供一系列手性烯丙基硅烷。更有趣的是,成功实现了具有高合成效率的一锅不对称合成。在醛和醛亚胺的不对称烯丙基化中证明了制备的手性 1,3-二取代烯丙基硅烷的效用。最后,在手性醛的不对称烯丙基化中观察到了一个有趣的“匹配和错配”现象。