碘苯二乙酸 、
methyl 2,3,4-tri-O-acetyl-α-L-rhamnopyranosyl(1->4)-6-deoxy-2,3-di-O-methyl-6-(4-methylphenylsulfonylamino)-α-D-galactopyranoside 在
碘 作用下,
以
二氯甲烷 为溶剂,
反应 2.5h,
以39%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-methylphenylsulfonylamino)-α-D-galactopyranoside