allyl 6-O-benzyl-2-deoxy-2-phtalimido-β-D-glucopyranoside 、
O-(2,3-di-O-acetyl-4,6-O-benzylidene-α-D-galactopyranosyl) trichloroacetimidate 在
三氟甲磺酸三甲基硅酯 作用下,
以
二氯甲烷 为溶剂,
以81%的产率得到Acetic acid (2S,4aR,6S,7R,8S,8aS)-8-acetoxy-6-[(2R,3S,4R,5R,6R)-6-allyloxy-2-benzyloxymethyl-5-(1,3-dioxo-1,3-dihydro-isoindol-2-yl)-4-hydroxy-tetrahydro-pyran-3-yloxy]-2-phenyl-hexahydro-pyrano[3,2-d][1,3]dioxin-7-yl ester