1-Acetyl-3-[(3<i>R)</i>-hydroxyfatty acyl]glycerols: Lipid Compounds from<i>Euphrasia rostkoviana</i><scp>Hayne</scp>and<i>E. tetraquetra</i>(<scp>Bréb</scp>.)<scp>Arrond.</scp>
作者:Peter Lorenz、Diana N. Knittel、Jürgen Conrad、Eva M. Lotter、Jörg Heilmann、Florian C. Stintzing、Dietmar R. Kammerer
DOI:10.1002/cbdv.201500233
日期:2016.5
three-step total synthesis of one representative homologue (euphrasianin A). The structure of the latter was confirmed by 1D- and 2D-NMR experiments as well as high-resolution electrospray ionization-mass spectrometry (HR-ESI-MS). The absolute configuration of the 3-hydroxyfatty acid moiety at C(3) was found to be R in the natural euphrasianins, which was determined by alkaline hydrolysis and methylation
通过气相色谱/质谱法(GC)首次鉴定了五种3-羟基脂肪酸的乙酰化乙酰甘油(链长C(14)-C(18)),称为Euphrasianins A-E,在Euphrasia rostkoviana Hayne(Orobanchaceae)中首次表征。 / MS)和高效液相色谱/大气压化学电离质谱(HPLC / APCI-MS(n))。除了质谱数据外,通过一种代表性同系物(胡麻黄素A)的三步全合成,验证了胡麻黄素的结构。后者的结构通过1D和2D-NMR实验以及高分辨率电喷雾电离质谱(HR-ESI-MS)得以证实。发现在天然胡杨苷中,在C(3)处3-羟基脂肪酸部分的绝对构型为R,其通过碱性水解和纯化部分的甲基化,然后进行手性GC分析来确定。此外,在四叶草(Euphrasia tetraquetra(Bréb。)Arrond)提取物中。仅检测了胡杨黄素C和E,表明该脂质成分的亚类可能对指纹方法有价值。