acetyl (2,3,4,6-tetra-O-acetyl-α-D-galactopyranosyl)-(1->4)-(2,3,6-tri-O-acetyl-α/β-D-galactopyranosyl) trichloroacetimidate 、
3-溴-1-丙醇 在
三氟甲磺酸三甲基硅酯 作用下,
以
二氯甲烷 为溶剂,
以65%的产率得到3-bromopropyl (2,3,4,6-tetra-O-acetyl-α-D-galactopyranosyl)-(1->4)-2,3,6-tri-O-acetyl-β-D-galactopyranoside