ethyl (2,6-di-O-acetyl-3,4-O-isopropylidene-β-D-galactopyranosyl)-(1<*>4)-3-O-acetyl-2-deoxy-2-phthalimido-1-thio-6-O-trimethylacetyl-β-D-glucopyranoside 、
benzyl O-(2,6-di-O-acetyl-β-D-galactopyranosyl)-(1<*>4)-3-O-acetyl-2-deoxy-2-phthalimido-6-O-trimethylacetyl-β-D-glucopyranoside 在
N-碘代丁二酰亚胺 、 molecular sieve 、
三氟甲磺酸 作用下,
以
二氯甲烷 为溶剂,
反应 0.5h,
以70%的产率得到benzyl O-(2,6-di-O-acetyl-3,4-O-isopropylidene-β-D-galactopyranosyl)-(1<*>4)-(3-O-acetyl-2-deoxy-2-phthalimido-6-O-trimethylacetyl-β-D-glucopyranosyl)-(1<*>3)-(2,6-di-O-acetyl-β-D-galactopyranosyl)-(1<*>4)-3-O-acetyl-2-deoxy-2-phthalimido-6-O-...