乙酸酐 、
benzyl-O-(3,4-di-O-acetyl-2,6-di-O-benzyl-α-D-galactopyranosyl)-(1-3)-O-(2,6-di-O-benzyl-β-D-galactopyranosyl)-(1-4)-2,3,6-tri-O-benzyl-β-D-glucopyranoside 在
4-二甲氨基吡啶 作用下,
以
吡啶 为溶剂,
反应 0.25h,
以65%的产率得到4' acetate of benzyl-O-(3,4-di-O-acetyl-2,6-di-O-benzyl-α-D-galactopyranosyl)-(1-3)-O-(2,6-di-O-benzyl-β-D-galactopyranosyl)-(1-4)-2,3,6-tri-O-benzyl-β-D-glucopyranoside