Convergent synthesis of the BCDEFGHIJ-ring polyether core of gambieric acids, potent antifungal polycyclic ethers
作者:Kazushi Sato、Makoto Sasaki
DOI:10.1016/j.tet.2007.02.039
日期:2007.6
A convergent synthesis of the nonacyclic BCDEFGHIJ-ring polyether core of gambieric acids, potent antifungal polycyclic ether marine natural products, has been achieved. The present synthesis involved as key features: (i) convergent union of the BCD- and GHIJ-ring fragments through esterification, (ii) construction of the E-ring as a lactone form via reductive acetylation, (iii) stereoselective allylation
已经完成了冈比亚酸的非环状BCDEFGHIJ环聚醚核(有效的抗真菌多环醚海洋天然产物)的会聚合成。本合成涉及关键特征:(i)通过酯化使BCD-和GHIJ-环片段收敛结合,(ii)通过还原性乙酰化将E-环构造成内酯形式,(iii)立体选择性烯丙基化以建立C26立体中心,和(iv)闭环易位反应,形成九元F环。