converted to glycosyl iodides and subsequently reacted with an azide source to achieve the stereoselective synthesis of beta-D-glycosyl azides after deacetylation. Low-temperature (4 degrees C) TEMPO oxidation of the monosaccharides provided the corresponding uronic acids, which were purified as the free acids. Oxidation of the lactosyl- and cellobiosyl azides resulted in diacid formation. However, 4',6'-O-benzylidene
首先将衍生自
单糖和二糖的过-O-乙酰化D-
甘露聚糖转化为糖基
碘,然后与
叠氮化物源反应,以在脱乙酰基反应后实现立体选择性合成β-D-糖基
叠氮化物。
单糖的低温(4摄氏度)
TEMPO氧化提供了相应的糖醛酸,其被纯化为
游离酸。
乳糖基和
纤维二糖叠氮化物的氧化导致二酸形成。然而,4',6'-O-亚苄基保护能够选择性氧化C-6羟基。还制备了2-乙酰胺基-2-脱氧-
D-甘露糖基
叠氮化物,并将其转化为糖醛酸,从而完成了文库的合成。