2,3,4,6-tetra-O-benzoyl-D-galactopyranosyl trichloroacetimidate 、
[(2R,3S,4S,5R,6R)-5-acetamido-3-hydroxy-6-phenylmethoxy-4-prop-2-enoxyoxan-2-yl]methyl benzoate 在
三氟甲磺酸三甲基硅酯 、 4 A molecular sieve 作用下,
生成 [(3aR,5R,6S,7S,7aR)-2-[(2R,3S,4S,5R,6R)-5-acetamido-2-(benzoyloxymethyl)-6-phenylmethoxy-4-prop-2-enoxyoxan-3-yl]oxy-6,7-dibenzoyloxy-2-phenyl-5,6,7,7a-tetrahydro-3aH-[1,3]dioxolo[4,5-b]pyran-5-yl]methyl benzoate 、 benzyl O-(2,3,4,6-tetra-O-benzoyl-β-D-galactopyranosyl)-(1->4)-2-acetamido-3-O-allyl-6-O-benzoyl-2-deoxy-β-D-allopyranoside