乙酸酐 、
2-(trimethylsilyl)ethyl 2,3,6-tri-O-benzoyl-4-O-<2,3-di-O-benzoyl-4-O-α-D-galactopyranosyl-β-D-galactopyranosyl>-β-D-glucopyranoside 在
吡啶 作用下,
以90%的产率得到2-(trimethylsilyl)ethyl 2,3,6-tri-O-benzoyl-4-O-[6-O-acetyl-2,3-di-O-benzoyl-4-O-(2,3,4,6-tetra-O-acetyl-α-D-galactopyranosyl)-β-D-galactopyranosyl]-β-D-glucopyranoside