(2R,3r,4s,5r,6r)-3,4,5-三s(苄氧基)-2-溴-6-(3-苯基丙基)四氢-2H-吡喃 、
methyl O-(2-acetamido-3,4,6-tri-O-acetyl-2-deoxy-β-D-glucopyranosyl)-(1->2)-O-(3-O-allyl-4-O-benzyl-α-L-rhamnopyranosyl)-(1->2)-4-O-benzyl-α-L-rhamnopyranoside 在
4 A molecular sieve 、 mercury dibromide 作用下,
以
二氯甲烷 为溶剂,
以36%的产率得到methyl O-(2-acetamido-3,4,6-tri-O-acetyl-2-deoxy-β-D-glucopyranosyl)-(1->2)-O-(3-O-allyl-4-O-benzyl-α-L-rhamnopyranosyl)-(1->2)-O-((2,3,4,6-tetra-O-benzyl-α-D-glucopyranosyl)-(1->3))-4-O-benzyl-α-L-rhamnopyranoside