Gallium(III)-Catalyzed Cycloisomerization Approach to the Diterpenoid Alkaloids: Construction of the Core Structure for the Hetidines and Hetisines
作者:Amy M. Hamlin、Felipe de Jesus Cortez、David Lapointe、Richmond Sarpong
DOI:10.1002/anie.201209030
日期:2013.4.26
A versatile core structure has been prepared that should provide a foundation for the syntheses of the hetidine‐ and hetisine‐type diterpenoid alkaloids. The synthesis of the caged polycyclic core structure, which features nine contiguous stereocenters, utilizes a GaIII‐catalyzed cycloisomerization of an alkynyl indene as well as a Michael/aldol sequence to build the bicyclo[2.2.2] framework.
已经制备了一种多功能的核心结构,为合成杂丁酸和杂丁酸型二萜生物碱提供了基础。具有九个连续立体中心的笼状多环核心结构的合成利用 Ga III催化的炔基茚的环异构化以及迈克尔/醛醇序列来构建双环 [2.2.2] 框架。
Ga(III)-Catalyzed Cycloisomerization Approach to (±)-Icetexone and (±)-<i>epi</i>-Icetexone
作者:Felipe de Jesus Cortez、Richmond Sarpong
DOI:10.1021/ol902959v
日期:2010.4.2
A Ga(III)-catalyzed cycloisomerization reaction provides expedient access to a benzannulated cycloheptadiene bearing a cyano group, which has been applied to the syntheses of several icetexane diterpenoids including icetexone and epi-icetexone. Key to the synthesis is a novel in situ generated diazene rearrangement.