2,3,4,6-tetra-O-benzoylglucosyl bromide 、
methyl <2-(4-trifluoroacetamidophenyl)ethyl 4-O-benzyl-5-O-(2-O-benzyl-α-D-glucopyranosyl)-3-deoxy-7,8-O-isopropylidene-α-D-manno-oct-2-ulopyranosid>onate 在
4 A molecular sieve 、
silver trifluoromethanesulfonate 作用下,
以
二氯甲烷 为溶剂,
反应 3.0h,
以38%的产率得到methyl <2-(4-trifluoroacetamidophenyl)ethyl 4-O-benzyl-5-O-<2-O-benzyl-3,4,6-tri-O-(2,3,4,6-tetra-O-benzoyl-β-D-glucopyranosyl)-α-D-glucopyranosyl>-3-deoxy-7,8-O-isopropylidene-α-D-manno-oct-2-ulopyranosid>onate