4-methoxyphenyl 2,4,6-tri-O-acetyl-β-D-glucopyranoside 、 Benzoic acid (2R,4aR,6R,7R,8S,8aR)-8-allyloxy-2-phenyl-6-(2,2,2-trichloro-acetimidoyloxy)-hexahydro-pyrano[3,2-d][1,3]dioxin-7-yl ester 在
三氟甲磺酸三甲基硅酯 作用下,
以
二氯甲烷 为溶剂,
反应 3.0h,
以74%的产率得到4-methoxyphenyl 3-O-allyl-2-O-benzoyl-4,6-O-benzylidene-β-D-glucopyranosyl-(1->3)-2,4,6-tri-O-acetyl-β-D-glucopyranoside