(R,R)-3,4,6-tri-o-benzoyl-1,2-o-propynylorthobenzoyl-α-D-galactopyranose 、
methyl 3,4-di-O-isopropylidene-6-O-propargyl-αD-galactopyranoside 在
gold(III) bromide 作用下,
以
二氯甲烷 为溶剂,
反应 1.0h,
以62%的产率得到(2R,3S,4S,5R,6S)-2-((benzoyloxy)methyl)-6-(((3aS,4R,6S,7R,7aS)-6-methoxy-2,2-dimethyl-4-((prop-2-yn-1-yloxy)methyl)tetrahydro-4H-[1,3]dioxolo[4,5-c]pyran-7-yl)oxy)tetrahydro-2H-pyran-3,4,5-triyl tribenzoate