1,2,3,4-tetra-O-acetyl-6-O-trityl-β-D-glucopyranose 、
methyl 3,4-di-O-acetyl-1,2-O-<1-(exo-cyano)ethylidene>-α-D-galactopyranuronate 反应 18.0h,
以54%的产率得到(2S,3R,4S,5R,6R)-3,4,5-Triacetoxy-6-((2R,3R,4S,5R,6S)-3,4,5,6-tetraacetoxy-tetrahydro-pyran-2-ylmethoxy)-tetrahydro-pyran-2-carboxylic acid methyl ester