、 Gal2Ac6Ac(b1-4)b-Glc1Me2Ac3Ac6Ac 在
N-碘代丁二酰亚胺 、
三氟甲磺酸 作用下,
以
四氯化碳 、
甲苯 为溶剂,
反应 2.5h,
以61%的产率得到methyl O-(methyl-5-acetamido-4,7,8,9-tetra-O-acetyl-3,5-dideoxy-α-D-glycero-D-galacto-2-nonulopyranosylonate)-(2-3)-O-(2,4,6-tri-O-acetyl-β-D-galactopyranosyl)-(1-3)-O-(4,6-di-O-acetyl-2-azido-2-deoxy-β-D-glucopyranosyl)-(1-3)-O-(2,4,6-tri-O-acetyl-β-D-galactopyranosyl)-(1-4)-2,3,6-tri-O-acetyl-β-D-glucopyranoside