dodecyl 2,3,4,6-tetra-O-benzyl-1-thio-β-D-galactopyranoside 、
methyl 2-O-benzoyl-4-O-benzyl-3,6-dideoxy-α-D-arabino-hexopyranosyl-(1->3)-4,6-O-benzylidene-α-D-mannopyranosyl-(1->4)-2,3-O-isopropylidene-α-L-rhamnopyranoside 在
4 A molecular sieve 、 sulfobromophthalein sodium 、
三氟甲磺酸酐 作用下,
以
二氯甲烷 为溶剂,
反应 1.25h,
以72%的产率得到methyl 2-O-benzoyl-4-O-benzyl-3,6-dideoxy-α-D-arabino-hexopyranosyl-(1->3)-[2,3,4,6-tetra-O-benzyl-α-D-galactopyranosyl-(1->2)]-4,6-O-benzylidene-α-D-mannopyranosyl-(1->4)-2,3-O-isopropylidene-α-L-rhamnopyranoside