8-methoxycarbonyloctyl 2,3-di-O-acetyl-6-O-benzoyl-β-D-galactopyranoside 、 Benzoic acid (2R,3R,4R,5R,6R)-3-[(2S,3R,4R,5R,6R)-3-(1,3-dioxo-1,3-dihydro-isoindol-2-yl)-4,5-dihydroxy-6-hydroxymethyl-tetrahydro-pyran-2-yloxy]-4,5-dihydroxy-6-(8-methoxycarbonyl-octyloxy)-tetrahydro-pyran-2-ylmethyl ester 在
2,4,6-三甲基吡啶 、
silver trifluoromethanesulfonate 作用下,
以
硝基甲烷 为溶剂,
以48%的产率得到8-methoxycarbonyloctyl 2,3-di-O-acetyl-6-O-benzoyl-4-O-(3,4,6-tri-O-acetyl-2-deoxy-2-phthalimido-β-D-galactopyranosyl)-β-D-galactopyranoside