methyl 2,3,4-tri-O-benzyl-α-D-galactopyranoside 、
Ethyl 2,3,4-tri-O-benzoyl-1-thio-β-L-fucopyranoside 在
三氟甲烷磺酸甲酯 作用下,
以
乙醚 为溶剂,
以59%的产率得到(2S,3R,4R,5S,6S)-2-methyl-6-(((2R,3S,4S,5R,6S)-3,4,5-tris(benzyloxy)-6-methoxytetrahydro-2H-pyran-2-yl)methoxy)tetrahydro-2H-pyran-3,4,5-triyl tribenzoate