碘苯二乙酸 、
methyl 2,3,4,6-tetra-O-methyl-α-D-mannopyranosyl(1->4)-6-deoxy-2,3-di-O-methyl-6-(4-nitrophenylsulfonylamino)-α-D-glucopyranoside 在
碘 作用下,
以
二氯甲烷 为溶剂,
反应 4.0h,
以52%的产率得到methyl 5-acetoxy-2,3,4,6-tetra-O-methyl-α-D-mannopyranosyl(1->4)-6-deoxy-2,3-di-O-methyl-6-(4-nitrophenylsulfonylamino)-α-D-glucopyranoside