(2R,4aR,6S,7R,8R,8aS)-6-((2R,3S,4R,5R,6R)-6-Azido-4,5-dihydroxy-2-hydroxymethyl-tetrahydro-pyran-3-yloxy)-2-(4-methoxy-phenyl)-hexahydro-pyrano[3,2-d][1,3]dioxine-7,8-diol 、
4-甲氧基氯苄 在
15-冠醚-5 咪唑 、
四丁基碘化铵 、 sodium hydride 作用下,
以
二甲基亚砜 为溶剂,
以54%的产率得到(2R,4aR,6S,7R,8S,8aR)-6-[(2R,3R,4S,5R,6R)-6-Azido-4,5-bis-(4-methoxy-benzyloxy)-2-(4-methoxy-benzyloxymethyl)-tetrahydro-pyran-3-yloxy]-7,8-bis-(4-methoxy-benzyloxy)-2-(4-methoxy-phenyl)-hexahydro-pyrano[3,2-d][1,3]dioxine