作者:Jianmin Shi、Lu Liu、Meng Tang、Tao Zhang、Hongjin Bai、Zhenting Du
DOI:10.1007/s10600-020-02987-3
日期:2020.3
An efficient synthesis of natural tribolure has been achieved through an asymmetric methylation as a key step. Natural tribolure is a mixture of four stereoisomers, so racemic 2-methylbutan-1-ol was used as starting material. After a C5+C4 strategy and then a mixed Evan’s template inductive methylation, the key intermediate was obtained. Finally, the natural product tribolure (4:4:1:1 of stereoisomers, respectively) was obtained in 10 linear steps and in 34.2% overall yield.
通过不对称甲基化作为关键步骤,实现了天然三醇的有效合成。天然tribolure是四种立体异构体的混合物,因此使用外消旋2-甲基丁-1-醇作为起始原料。经过C5+C4策略,然后混合埃文模板诱导甲基化,得到关键中间体。最后,经过10个线性步骤获得了天然产物tribolure(立体异构体分别为4:4:1:1),总产率为34.2%。