Asymmetric total synthesis of ( R )-α-cuparenone, ( S )-cuparene and formal synthesis of ( R )-β-cuparenone through Meinwald rearrangement and ring closing metathesis (RCM) reaction
作者:Rajan Kumar、Joydev Halder、Samik Nanda
DOI:10.1016/j.tet.2016.12.072
日期:2017.2
Asymmetric synthesis of enantiopure cuparenoid sesquiterpenes (R)-α-cuparenone, (S)-cuparene and a formal synthesis of (R)-β-cuparenone was presented in this article. Meinwald rearrangement of an enantiopure trisubstituted 2,3-epoxy alcohol derivative was the key reaction employed to construct the quaternary streocenter in the target molecules. Ring closing metathesis (RCM) reaction was explored in
本文介绍了对映体纯的铜烯类倍半萜烯(R)-α-cuparenone,(S)-cuparene的不对称合成以及(R)-β-cuparenone的形式合成。对映体三取代的2,3-环氧醇衍生物的Meinwald重排是用于在目标分子中构建季构中心的关键反应。在合成的最后阶段探索了闭环复分解(RCM)反应,以接近天然产物的环戊烷核心。