allyl 2,3,4,6-tetra-O-benzoyl-α-D-mannopyranosyl-(1->4)-6-O-tert-butyldimethylsilyl-2,3-O-isopropylidene-α-D-mannopyranoside 在
对甲苯磺酸 作用下,
以
甲醇 、
乙酸乙酯 为溶剂,
反应 2.5h,
以42%的产率得到allyl 2,3,4,6-tetra-O-benzoyl-α-D-mannopyranosyl-(1->4)-6-O-tert-butyldimethylsilyl-α-D-mannopyranoside