An iterative acetylene–epoxide coupling strategy for the total synthesis of longimicin C
作者:Yan-Tao He、Song Xue、Tai-Shan Hu、Zhu-Jun Yao
DOI:10.1016/j.tetlet.2005.05.145
日期:2005.8
Longimicin C, a naturally occurring annonaceous acetogenin possessing a C2-symmetrical bis-THF moiety and a short hydrocarbon chain between its THF-containing region and a terminal γ-lactone, was synthesized for the first time. The total synthesis was successfully achieved by an iterative acetylene–epoxide coupling strategy. d-Mannitol was used to establish the bis-THF-containing segment, in which
首次合成了Longimicin C,它是一种天然的非乙酰丙酮原蛋白,具有C 2对称的双THF部分,并且在其含THF的区域和末端γ-内酯之间具有短的烃链。通过迭代的乙炔-环氧偶联策略成功完成了总合成。d-甘露糖醇用于建立含双THF的链段,其中的附加立体化学是通过Sharpless二羟基化和分子内Williamson醚化引入的。适当的末端乙炔的区域选择性环氧化物开口允许偶联和修饰所有四个片段,包括将三个必需的羟基引入目标骨架的适当位点。