Structure elucidation and synthesis of (4S,5S,6Z,8E )-5-hydroxydeca-6,8-dien-4-olide [(S,S)-sapinofuranone B]—a novel γ-lactone metabolite of Acremonium strictum
作者:Sarah Clough、Mairi E. Raggatt、Thomas J. Simpson、Christine L. Willis、Andrew Whiting、Stephen K. Wrigley
DOI:10.1039/b001823f
日期:——
The structure of (4S,5S,6Z,8E)-5-hydroxydeca-6,8-dien-4-olide, a novel metabolite of Acremonium strictum, has been established by spectroscopic studies and chemical correlation with the known L-factor. The structure has been confirmed by a total synthesis in which the asymmetric centres at C-4 and C-5 were elaborated from dimethyl L-tartrate and the 6,8-diene moiety was introduced via Stille coupling of (E)-prop-1-enyltributyltin with a (Z)-vinylic iodide. The absolute configurations of sapinofuranones A and B, recently isolated metabolites of Sphaeropsis sapinae, are shown to be the corresponding (4R,5S) and (4R,5R) diastereomers of the A. strictum metabolite.
(4S,5S,6Z,8E)-5-Hydroxydeca-6,8-dien-4-olide 是 Acremium strictum 的一种新型代谢物,其结构已通过光谱研究和与已知 L 因子的化学相关性确定。该结构已通过全合成得到证实,其中C-4和C-5处的不对称中心由L-酒石酸二甲酯精心设计,并通过(E)-prop-1的Stille偶联引入6,8-二烯部分-烯基三丁基锡与(Z)-乙烯基碘化物。最近分离的 Sphaeropsis sapinae 代谢物 Sapinofuranones A 和 B 的绝对构型显示为 A. strictum 代谢物的相应 (4R,5S) 和 (4R,5R) 非对映异构体。