Synthesis and determination of the absolute configuration of (−)-(5<i>R</i>,6<i>Z</i>)-dendrolasin-5-acetate from the nudibranch <i>Hypselodoris jacksoni</i>
作者:I Wayan Mudianta、Victoria L Challinor、Anne E Winters、Karen L Cheney、James J De Voss、Mary J Garson
DOI:10.3762/bjoc.9.329
日期:——
6Z)-dendrolasin-5-acetate, which was fully characterized by 2D NMR studies, was isolated from the nudibranch Hypselodoris jacksoni, along with the sesquiterpenes (+)-agassizin, (-)-furodysinin, (-)-euryfuran, (-)-dehydroherbadysidolide and (+)-pallescensone. A synthetic sample ([alpha]D -8.7) of the new metabolite was prepared by [1,2]-Wittig rearrangement of a geranylfuryl ether followed by acetylation of
(-)-(5R,6Z)-dendrolasin-5-acetate 的小样本(通过 2D NMR 研究充分表征)是从裸鳃亚纲 Hypselodoris jacksoni 中分离出来的,以及倍半萜烯 (+)-agassizin、(-) -呋喃西宁、(-)-广呋喃、(-)-脱氢草苷内酯和(+)-pallescensone。新代谢物的合成样品(αD -8.7)是通过香叶基呋喃基醚的[1,2]-维蒂希重排,然后对纯化的醇异构体进行乙酰化来制备的。通过分析制备型对映选择性 HPLC 获得的 (Z)-5-羟基树松素的 MPA 酯衍生物,将 C-5 处的绝对构型确定为 R。