methyl (2,3,4-tri-O-acetyl-α-L-idopyranosyl trichloroacetimidate)uronate 、
1,6-di-O-acetyl-2-azido-3-O-benzyl-2-deoxy-β-D-glucopyranose 在
三氟甲磺酸三甲基硅酯 、 4 A molecular sieve 作用下,
以
二氯甲烷 为溶剂,
反应 2.5h,
以85%的产率得到(2R,3S,4S,5R,6R)-3,4,5-Triacetoxy-6-((2R,3S,4R,5R,6S)-6-acetoxy-2-acetoxymethyl-5-azido-4-benzyloxy-tetrahydro-pyran-3-yloxy)-tetrahydro-pyran-2-carboxylic acid methyl ester