Efficient Synthesis of a Styryl Analogue of (2S,3R,4E)-N2-Octadecanoyl-4-tetradecasphingenine via Cross-Metathesis Reaction
作者:Gulshan Kumar、Sukhbir Kaur、Vasundhara Singh
DOI:10.1002/hlca.201000277
日期:2011.4
The first total synthesis of sphingolipid (2S,3R,4E)‐N2‐octadecanoyl‐4‐tetradecasphingenine (1a), a natural sphingolipid isolated from Bombycis Corpus 101A, and of its styryl analogue 1b was achieved in good overall yield (Schemes 1 and 2). The key step involved the installation with (E) stereoselectivity of a long lipophilic chain or phenyl group on allyl alcohol derivative 3 via a cross‐metathesis
鞘脂的第一全合成(2小号,3 - [R,4 ë) - ñ 2 -octadecanoyl -4- tetradecasphingenine(1A),天然鞘脂从虫语料库101A分离,并且它的苯乙烯基类似物的图1b是在良好的总收率达到(方案1和2)。关键步骤涉及通过交叉复分解反应(→ 5a或5b)在烯丙醇衍生物3上以(E)立体选择性安装长亲脂性链或苯基。受N‐ Boc保护的3 可以很容易地从(S)‐ Garner醛中获得。