α,β-3,4-di-O-acetyl-6-deoxy-2-deoxy-2-iodo-D-glucopyranosyl trichloroacetimidate 在
4-二甲氨基吡啶 、
叔丁基二甲硅基三氟甲磺酸酯 、
三乙胺 作用下,
以
二氯甲烷 为溶剂,
反应 29.5h,
生成 4-O-acetyl-3-O-(4-O-acetyl-3-O-(3,4-di-O-acetyl-6-deoxy-2-deoxy-2-iodo-β-D-glucopyranosyl-(1->3))-2,6-dideoxy-2-bromo-β-D-galactopyranosyl)-(1->3)-α-D-glucopyranosyl fluoride