Sphinga-4,8-dienines, principal long-chain bases of glycolipids in plants and fungi, were efficiently synthesized from l-serine. Hydrozirconation of pentadec-5-en-1-ynes followed by ZnBr2-catalyzed addition to Garner's aldehyde afforded protected sphinga-4,8-dienines stereoselectively. The (2S,3R,4E,8E)-9-methyl-sphingadienine derivative was then coupled with 2(R)-acetoxypalmitic acid derivative prepared
Sphinga-4,8-dienines是植物和真菌中
糖脂的主要长链碱基,是从l-
丝氨酸有效合成的。十五碳五烯-1-炔的加氢
锆化反应,然后在Garner醛中进行ZnBr 2催化加成,从而立体选择性地提供了受保护的Sphinga-4,8-二烯。然后将(2 S,3 R,4 E,8 E)-9-甲基-鞘
氨二烯衍
生物与通过不对称二羟基化制得的2(R)-乙酰氧基
棕榈酸衍
生物偶联,得到受保护的神经酰胺,将其转化为相应的
葡糖脑苷脂分两步走。