A Biomimetic Strategy to Access the Silybins: Total Synthesis of (−)-Isosilybin A
作者:Benjamin R. McDonald、Antoinette E. Nibbs、Karl A. Scheidt
DOI:10.1021/ol503303w
日期:2015.1.2
We report the first asymmetric, total synthesis of (−)-isosilybin A. A late-stage catalytic biomimetic cyclization of a highly functionalized chalcone is employed to form the characteristic benzopyranone ring. A robust and flexible approach to this chalcone provides an entry to the preparation of the entire isomeric family of silybin natural products.
我们报告了 (−)-异水飞蓟宾 A 的首次不对称全合成。采用高功能化查耳酮的后期催化仿生环化形成特征性苯并吡喃酮环。这种查尔酮的稳健而灵活的方法为制备水飞蓟宾天然产物的整个异构体家族提供了一个入口。