Formal Total Synthesis of Hemibrevetoxin B via the Intramolecular Allylation Followed by Ring-Closing Metathesis
作者:Isao Kadota、Takashi Abe、Yukako Ishitsuka、Abeda S. Touchy、Ryoko Nagata、Yoshinori Yamamoto
DOI:10.3987/com-07-s(w)39
日期:——
A formal total synthesis of hemibrevetoxin B (1) is described. Intramolecular allylation of α-chloroacetoxy ether 10, prepared from carboxylic acid 11 and alcohol 12, was carried out with MgBr 2 ·OEt 2 to give 27. Ring-closing metathesis of 27 furnished tetracycle 29, which was converted to a known synthetic intermediate 9, to complete a formal total synthesis of 1.
描述了 hemibrevetoxin B (1) 的正式全合成。用 MgBr 2 ·OEt 2 对由羧酸 11 和醇 12 制备的 α-氯乙酰氧基醚 10 进行分子内烯丙基化,得到 27。 27 的闭环复分解得到四环 29,其转化为已知的合成中间体 9 ,完成1的正式全合成。