作者:Celia Ribes、Eva Falomir、Miguel Carda、J.A. Marco
DOI:10.1016/j.tet.2006.03.073
日期:2006.6
A stereoselective synthesis in enantiopure form of the natural anhydrophytosphingosine pachastrissamine (jaspine B), a metabolite isolated from sponges, is described. The chiral epoxide (R)-glycidol was the starting material. Key steps of this synthesis are a Sharpless asymmetric epoxidation, an intramolecular stereospecific epoxide opening mediated by a trichloroacetimidate group, and the formation
描述了对映体纯形式的天然脱水植物鞘氨醇pachastrissamine(jaspine B),一种从海绵中分离出来的代谢物的立体选择性合成。手性环氧化物(R)-缩水甘油是起始原料。该合成的关键步骤是无尖锐的不对称环氧化,由三氯乙酰亚胺酸酯基团介导的分子内立体特异性环氧化物开环和通过分子内亲核取代形成四氢呋喃环。