postulated that this glycosylation behaviour originates from nucleophilic attack at the oxacarbenium ion, which adopts the most favourable 3H4 conformation. Building on the stereoselectivity of gulose, a guluronic acid alginate trisaccharide was assembled for the first time by using gulopyranosyl building blocks.
已经绘制出了鬼臼
吡喃糖苷的糖基化特性,并且显示出
古洛糖对于形成1,2-顺式-糖苷键具有内在的偏好。据推测,这种糖基化行为源自氧杂碳鎓离子的亲核攻击,氧杂碳鎓离子采用最有利的3H4构象。以
古洛糖的立体选择性为基础,使用古洛
吡喃糖基结构单元首次组装了
古洛糖酸
海藻酸三糖。