De Novo Formal Synthesis of (−)-Apicularen A via an Iterative Asymmetric Hydration Sequence
作者:Miaosheng Li、George A. O'Doherty
DOI:10.1021/ol062595u
日期:2006.12.1
synthesis of the macrolide natural product (-)-apicularen A has been achieved in 18 steps from achiral starting materials. Both the absolute and relative stereochemistries of apicularen A were introduced by a Sharpless asymmetric dihydroxylation, a pi-allyl-palladium catalyzed reduction, a stereoselective reduction, and a base-promoted transannulation to install the C-9 stereocenter.
[结构:见正文]从非手性起始原料开始,已通过18个步骤实现了大环内酯类天然产物(-)-apicularen A的正式全合成的从头研究方法。通过Sharpless不对称二羟基化,π-烯丙基-钯催化的还原反应,立体选择性还原反应和碱促进的环过环反应来安装A-9的绝对和相对立体化学,以安装C-9立体中心。