作者:Xiaochun Xiong、Yong Li、Zhaoyong Lu、Ming Wan、Jun Deng、Shuhang Wu、Huawu Shao、Ang Li
DOI:10.1039/c3cc47873d
日期:——
An efficient approach toward the synthesis of the 6,6,5,7-tetracyclic core of the daphnilongeranin B, a Daphniphyllum alkaloid, is reported. The bridged 6,6-bicyclic system was constructed using a gold(I) catalysed Conia-ene reaction, while the 5- and 7-membered rings were assembled by two diastereoselective Michael addition reactions, respectively.
报道了一种高效合成大葱碱B的6,6,5,7-四环核心的策略。通过金(I)催化的Conia-ene反应构建了桥联的6,6-双环体系,而5和7个成员的环则分别通过两次立体选择性的Michael加成反应组装而成。