allyl 6-O-benzyl-2-deoxy-2-phtalimido-β-D-glucopyranoside 、
methyl 2,3,4-tri-O-acetyl-6-O-benzyl-1-thio-β-D-galactopyranoside 在
三氟甲烷磺酸甲酯 作用下,
以
甲苯 为溶剂,
以61%的产率得到Acetic acid (2S,3R,4S,5S,6R)-4,5-diacetoxy-2-[(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]-6-benzyloxymethyl-tetrahydro-pyran-3-yl ester