作者:Denis Tailler、Vincent Ferrières、Klaus Pekari、Richard R. Schmidt
DOI:10.1016/s0040-4039(98)02579-9
日期:1999.1
Disintegration of the target molecule 1 into building blocks A-E was performed. For D, an efficient synthesis of mannose derivative 5, representing mannose residue c in the target molecule, could be performed; 5 permits the required regioselective access to C-1, 2-O, 4-O, and 6-O. Reaction of 5 with galactosamine donor 3 led to D in high yield. E could be readily prepared from known mannosyl donors
进行目标分子1的分解成结构单元AE。对于D,可以进行代表目标分子中甘露糖残基c的甘露糖衍生物5的有效合成。5允许对C -1、2- O,4- O和6- O进行区域选择性访问。的反应5与半乳糖胺供体3导致d以高收率。E可以很容易地从已知的甘露糖基供体7和9制备。AE组合仅在十一个高产率的步骤中导致了完全被O-苄基保护的靶分子14,因此展现了这种会聚策略的效率,该策略提供了靶分子1。