碘苯二乙酸 、
methyl 2,3,4-tri-O-acetyl-α-L-rhamnopyranosyl-(1->4)-6-deoxy-6-(4-methoxyphenylsulfonylamino)-2,3-di-O-methyl-α-D-galactopyranoside 在
碘 作用下,
以
二氯甲烷 为溶剂,
反应 2.0h,
以32%的产率得到methyl 5-acetoxy-2,3,4-tri-O-acetyl-α-L-rhamnopyranosyl(1->4)-6-deoxy-2,3-di-O-methyl-6-(4-methoxyphenylsulfonylamino)-α-D-galactopyranoside