乙酸酐 、
4-O-acetyl-1,6-anhydro-3-deoxy-2-S-(2,3,4,6-tetra-O-acetyl-2-thio-β-galactopyranosyl)-β-D-ribo-hexopyranose 在
三乙基硅基三氟甲磺酸酯 作用下,
反应 12.0h,
生成 3-deoxy-2-S-(2,3,4,6-tetra-O-acetyl-β-galactopyranosyl)-1,2,6-tri-O-acetyl-1-thio-β-D-glucopyranose 、 3-deoxy-2-S-(2,3,4,6-tetra-O-acetyl-β-galactopyranosyl)-1,2,6-tri-O-acetyl-1-thio-α-D-glucopyranose