作者:Yongzheng Qu、Zheyuan Wang、Zhongchao Zhang、Wendou Zhang、Jun Huang、Zhen Yang
DOI:10.1021/jacs.0c02143
日期:2020.4.8
The asymmetric total synthesis of (+)-waihoensene, which has a cis-fused [6,5,5,5] tetracyclic core bearing an angular triquinane, a cis-fused six-membered ring, and four contiguous quaternary car-bon atoms, was achieved through a sequence of chemical reac-tions in a stereochemically well-defined manner. The total synthe-sis features: 1) Cu-catalyzed asymmetric conjugated 1,4-addition; 2) diastereoselective
(+)-waihoensene 的不对称全合成,其具有顺式稠合 [6,5,5,5] 四环核心,带有角三喹烷、顺式稠合六元环和四个连续的季碳原子, 是通过一系列化学反应以立体化学上明确定义的方式实现的。总合成特点: 1)Cu催化不对称共轭1,4-加成;2) 非对映选择性的 Conia-ene 反应;3)非对映选择性分子内Pauson-Khand反应;4) Ni催化的非对映选择性共轭1,4-加成;5)自由基引发的分子内氢原子转移(HAT)。控制实验和密度泛函理论计算支持提议的 HAT 过程。