Acetyl-O-(2,3,4,6-tetra-O-p-toluyl-β-D-galactopyranosyl)-(1->3)-4,6-di-O-acetyl-2-azido-2-desoxy-α/β-D-galactopyranosid 在
溴化钛(IV) 作用下,
以
二氯甲烷 、
乙酸乙酯 为溶剂,
反应 3.0h,
以94%的产率得到O-(2,3,4,6-Tetra-O-p-toluyl-β-D-galactopyranosyl)-(1->3)-4,6-di-O-acetyl-2-azido-2-desoxy-α-D-galactopyranosylbromid