Six Trikentrin-like Cyclopentanoindoles from <i>Trikentrion flabelliforme</i>. Absolute Structural Assignment by NMR and ECD
作者:Mariam N. Salib、Tadeusz F. Molinski
DOI:10.1021/acs.joc.7b02813
日期:2018.2.2
analysis. The compounds are analogues of previously described trikentrins, herbindoles, and trikentramides from related Axinellid sponges. The assignment of absolute configuration of the new compounds was carried out largely by comparative analysis of specific rotation, calculated and measured ECD, and exploiting van’t Hoff’s principle of optical superposition. Five of the new compounds were chemically
从西澳大利亚海绵Trikentrion flabelliforme中分离出六个新的环戊[ g ]吲哚亨舍尔(Hentschel),1912年,其结构通过综合光谱分析得以阐明。所述化合物是先前描述的来自相关Axinellid海绵的曲肯三烯,除草吲哚和曲肯三酰胺的类似物。新化合物的绝对构型的分配主要是通过对比旋光的比较分析,计算和测量的ECD并利用van't Hoff的光学叠加原理进行的。对五个新化合物进行了化学互变,以建立它们的立体化学关系,从而为该手性吲哚家族的分配提供了简单的手性助记符。提出了第一个生物合成假说,以解释曲克林-赫宾醇家族的起源,并提出了吡咯-羧酸硫酯引发的聚酮合酶机制。