Synthesis of the ABC Ring System of Jiadifenin <i>via</i> Pd-Catalyzed Cyclizations
作者:Kenichi Harada、Akiko Imai、Kazuharu Uto、Rich G. Carter、Miwa Kubo、Hideaki Hioki、Yoshiyasu Fukuyama
DOI:10.1021/ol103024z
日期:2011.3.4
An efficient route toward the central ABC system of jiadifenin has been developed using two key Pd-catalyzed cyclizations. A protic solvent-activated Mizoroki−Heck reaction was used to construct the C9 quaternary carbon and the A ring. A cascading Tsuji−Trost cyclization/lactonization sequence was employed to establish the BC ring system and the C5,6 stereochemistry.
利用两个关键的Pd催化环化反应,已开发出一条通往加地芬宁中央ABC系统的有效途径。质子溶剂活化的Mizoroki-Heck反应用于构建C 9季碳和A环。一个级联的Tsuji-Trost环化/内酯化序列被用来建立BC环系统和C 5,6立体化学。