Asymmetric Synthesis of (−)-Incarvillateine Employing an Intramolecular Alkylation via Rh-Catalyzed Olefinic C−H Bond Activation
作者:Andy S. Tsai、Robert G. Bergman、Jonathan A. Ellman
DOI:10.1021/ja8012159
日期:2008.5.1
An asymmetric total synthesis of (-)-incarvillateine, a natural product having potent analgesic properties, has been achieved in 11 steps and 15.4% overall yield. The key step is a rhodium-catalyzed intramolecular alkylation of an olefinic C-H bond to set two stereocenters. Additionally, this transformation produces an exocyclic, tetrasubstituted alkene through which the bicyclic piperidine moiety
(-)-incarvillateine 是一种具有强镇痛作用的天然产物,通过 11 个步骤完成了不对称全合成,总产率为 15.4%。关键步骤是铑催化的烯烃 CH 键的分子内烷基化以设置两个立体中心。此外,这种转化会产生一种环外、四取代的烯烃,通过它可以很容易地获得双环哌啶部分。