1-[(2R,3R,4R,5S,6R)-5-hydroxy-2-methoxy-4-phenylmethoxy-6-(phenylmethoxymethyl)oxan-3-yl]-3,4-dimethylpyrrole-2,5-dione 、
2,3,5,6-tetra-O-benzoyl-β-D-galactofuranosyl trichloroacetimidate 在
三氟甲磺酸三甲基硅酯 作用下,
以
二氯甲烷 、
乙腈 为溶剂,
反应 4.0h,
以70%的产率得到methyl 2,3,5,6-tetra-O-benzoyl-β-D-galactofuranosyl-(1->4)-3,6-di-O-benzyl-2-deoxy-2-dimethylmaleimido-β-D-glucopyranoside