作者:Rolf Jansen、Janna Velder、Siegfried Blechert
DOI:10.1016/0040-4020(95)00494-s
日期:1995.8
A novel ring enlargement methodology and its application to taxane A,B-ring synthesis is introduced. In a one pot-procedure an elimination-epoxidation sequence starting from 5 leads to molecules of type 6 which can be transformed into taxane A,B-ring systems via a tandem reaction. A retroaldol-epoxidation sequence starting from 15 yields taxane A,B-ring systems suitably functionalized for Diels-Alder
介绍了一种新的扩环方法及其在紫杉烷类A,B环合成中的应用。在一个一锅法中,从5开始的消除-环氧化顺序导致生成6型分子,该分子可以通过串联反应转化为紫杉烷A,B环系统。从15开始的逆醛醇-环氧化序列产生紫杉烷A,B-环系统,其被适当地官能化以用于Diels-Alder反应。