The removal of a transient Fmoc protecting group can be simply performed by the addition of excess Et 3 N just after the accomplishment of a Bi(OTf) 3 -promoted glycosidation reaction. The obtained oligosaccharide can be directly employed as a glycosyl acceptor for further elongation of the saccharide. The preparation of biologically important, linear and branched mannans incorporated into HIV gp120
在 Bi(OTf) 3 促进的糖苷化反应完成后,通过添加过量的 Et 3 N 可以简单地去除瞬时 Fmoc 保护基团。得到的寡糖可以直接作为糖基受体进一步延伸糖类。纳入 HIV gp120 的生物学上重要的线性和分支甘露聚糖的制备表明,这种单锅序列的迭代导致了非常简单的寡糖组装。