An efficient asymmetric synthesis of (4
<i>R</i>
,8
<i>R</i>
)‐4,8‐dimethyldecanal, the most active component of natural
<i>Tribolure</i>
作者:Jianmin Shi、Liang Wei、Lu Liu、Meng Tang、Tao Zhang、Hongjin Bai、Zhenting Du
DOI:10.1002/jccs.201800381
日期:2019.7
An asymmetric synthesis of (4R,8R)‐4,8‐dimethyldecanal, the most active component of natural tribolure, was achieved through an asymmetric methylation as a key step and chiral‐pool strategy. Natural tribolure is a mixture of four stereoisomers, (4R,8R)/(4R,8S)/(4S,8R)/(4S,8S), and their ratio is 4/4/1/1. However, the (4R,8R)‐isomer is the most active one. Based on a chiral‐pool strategy, we used a
通过不对称甲基化作为关键步骤和手性池策略,实现了天然四环化合物的最活跃成分(4 R,8 R)‐4,8‐二甲基癸醛的不对称合成。天然tribolure是四种立体异构体(4 R,8 R)/(4 R,8 S)/(4 S,8 R)/(4 S,8 S)的混合物,其比率为4/4/1 / 1。但是,(4 R,8 R)-异构体是最活跃的。基于手性池策略,我们使用了回收的手性分子(R)我们在上一篇文章中利用的4-(苄氧基)-3-甲基丁醛。在执行C5 + C5 + C2合成计划后,目标分子以9个线性步骤获得,总产率为36.8%。