Divergent Synthesis of Trans-Fused Polycyclic Ethers by a Convergent Oxiranyl Anion Strategy
作者:Takeo Sakai、Ai Sugimoto、Hiroki Tatematsu、Yuji Mori
DOI:10.1021/jo302267f
日期:2012.12.21
oxiranyl anion generated from an epoxy sulfone, followed by ring expansion, allowed for the incorporation of medium-sized ring ethers into the key intermediate. Subsequent acetal formation and reductive etherification afforded various octacycles containing seven- and eight-membered ether rings.
对应于耶司毒素CDEFGHIJ环系统的八环聚醚以及G和/或I环修饰的类似物,是使用[X + 2 + Y]型从一种常见的中间体开始,以发散的方式合成的收敛方法。三氟甲磺酸酯与环氧砜产生的环氧乙烷基阴离子反应,然后进行环扩环,从而允许将中等大小的环醚掺入关键中间体中。随后的乙缩醛形成和还原性醚化反应得到了各种八环,其中包含七元和八元醚环。