作者:Takahiro Suzuki、Takeshi Koyama、Kenta Nakanishi、Susumu Kobayashi、Keiji Tanino
DOI:10.1021/acs.joc.0c01462
日期:2020.8.7
Aconitum hemsleyanum, is a non-alkaloidal diterpene which possesses a unique pentacyclic skeleton that contains an unprecedented tetracyclo[5.3.3.04,9.04,12]tridecane unit. We report herein the formal total synthesis of atropurpuran. The key features of our synthetic route are a high diastereoselective construction of the tri- and tetrasubstituted carbons (i.e., C4, C5, C10, and C20) through an Yb-catalyzed
从紫花乌头的根中分离出来的阿扑嘌呤是一种非生物碱的二萜,它具有独特的五环骨架,该骨架包含前所未有的四环[5.3.3.0 4,9 .0 4,12 ]十三烷单元。我们在这里报告了阿扑嘌呤的正式全合成。我们合成路线的关键特征是在水介质中通过Yb催化的Mukaiyama aldol反应对三和四取代碳(即C4,C5,C10和C20)进行高非对映选择性构建,包括分子内Diels-Alder反应/环闭合复分解反应构建了独特的五聚紫癜的五环骨架。