Enantiodivergent Biosynthesis of the Dimeric Sphingolipid Oceanapiside from the Marine Sponge <i>Oceanapia phillipensis</i>. Determination of Remote Stereochemistry
作者:Gillian M. Nicholas、Tadeusz F. Molinski
DOI:10.1021/ja994215o
日期:2000.5.1
determination of the local relative configuration at each of the termini of the long chain bis-aminolipid and also relates the absolute configuration of the two remote termini. Oceanapiside contains erythro and threo relative configurations at C1,2 and C26,27, respectively, but opposite absolute configurations at the amino substituted carbons C2 and C27 which implies an enantiodivergent biogenesis formally
Oceanapiside 的绝对立体化学是一种具有四个立体中心的抗真菌 α,ω-双氨基羟基脂质,来自海洋海绵 Oceanapia phillipensis Dendy,1895,通过基于通用 CD 方法的开发和应用获得了 2S、3R、26R、27R双氨基醇过苯甲酰基衍生物中加性激子耦合的叠加。该方法允许同时确定长链双氨基脂的每个末端的局部相对构型,并且还涉及两个远程末端的绝对构型。Oceanapiside 分别在 C1,2 和 C26,27 处包含赤型和苏式相对构型,但在氨基取代的碳 C2 和 C27 处具有相反的绝对构型,这意味着从 d 和 l 氨基酸正式衍生的对映发散生物发生。