A common approach to the total synthesis of l-arabino-, l-ribo-C18-phytosphingosines, ent-2-epi-jaspine B and 3-epi-jaspine B from d-mannose
作者:Miroslava Martinková、Kvetoslava Pomikalová、Jozef Gonda、Mária Vilková
DOI:10.1016/j.tet.2013.07.028
日期:2013.9
for the total syntheses of the protected l-arabino- and l-ribo-C18-phytosphingosine (8 and 9, respectively), HCl salts of ent-2-epi-jaspine B (ent-6) and 3-epi-jaspine B (7) with efficient use of both flexible building blocks 26 and 27 was achieved. The key step of this approach was [3,3]-sigmatropic rearrangement of allylic trichloroacetimidate 21 and thiocyanate 22, which were derived from the known
对于受保护的全合成的常用策略升-阿拉伯糖-和升-核糖-C 18 -phytosphingosine(8和9,分别地),盐酸的盐耳鼻喉科-2-外延-jaspine B(ENT - 6)和3-实现了有效利用柔性构件26和27的Epi- jaspine B(7)。该方法的关键步骤是烯丙基三氯乙酰亚胺酸酯21和硫氰酸酯22的[3,3]σ重排。,将其与已知的2,3衍生自:5,6-二- ö异亚丙基d -mannofuranose 18为手性的来源。利用维蒂希反应来安装侧链功能。