5-(methoxycarbonyl)pentyl 3,4-bis-O-(2-deoxy-3,4,6-tri-O-acetyl-2-phthalimido-β-D-glucopyranosyl)-β-D-galactopyranoside 在
吡啶 、
4-二甲氨基吡啶 、
sodium methylate 作用下,
以
甲醇 为溶剂,
反应 8.0h,
生成 6-{(2R,3R,4R,5S,6R)-4,5-Bis-[(2S,3R,4R,5S,6R)-3-(1,3-dioxo-1,3-dihydro-isoindol-2-yl)-4,5-dihydroxy-6-hydroxymethyl-tetrahydro-pyran-2-yloxy]-3-hydroxy-6-hydroxymethyl-tetrahydro-pyran-2-yloxy}-hexanoic acid methyl ester