contained no observable olefin isomerization by product and was demonstrated to be optically pure by a novel method utilizing Mosher's acid. Ceramide (10) was prepared from this sphingosine (9) with highly homogeneous (99.8% C16:0) palmitic acid by two methods. The cerebroside glucosylceramide (23) was the next sphingolipid in this series to be synthesized in a highly homogeneous form. These three sphingolipids
D-赤型-
鞘氨醇(9)的总合成是通过手性特异性方法从
D-半乳糖开始,通过
叠氮基
鞘氨醇中间体进行的,得到高度均一的(> 99.9%C18:1)
鞘氨醇碱(9),其中没有可观察到的烯烃异构化现象副产物,并通过使用Mosher酸的新方法证明其是光学纯的。通过两种方法,从这种
鞘氨醇(9)与高度均一的(99.8%C16:0)
棕榈酸制备神经酰胺(10)。脑苷
葡糖神经酰胺(23)是该系列中下一个以高度均一形式合成的鞘脂。这三种鞘脂目前正用于对其
水合的
生物分子组装体的结构进行
生物物理研究。