17-azido-3,6,9,12,15-pentaoxaheptadecyl 2-acetamido-3,6-di-O-benzyl-2-deoxy-β-D-glucopyranoside 、 methyl (2S,4S,5R,6R)-5-acetamido-4-acetyloxy-2-[(2R,3S,4S,5R,6S)-3,5-diacetyloxy-2-(benzoyloxymethyl)-6-(2,2,2-trichloroethanimidoyl)oxyoxan-4-yl]oxy-6-[(1S,2R)-1,2,3-triacetyloxypropyl]oxane-2-carboxylate 在
4 A molecular sieve 、
三氟化硼乙醚 作用下,
以
二氯甲烷 为溶剂,
反应 2.0h,
以48%的产率得到methyl (2S,4S,5R,6R)-5-acetamido-2-[(2S,3R,4S,5S,6R)-2-[(2R,3S,4R,5R,6R)-5-acetamido-6-[2-[2-[2-[2-[2-(2-azidoethoxy)ethoxy]ethoxy]ethoxy]ethoxy]ethoxy]-4-phenylmethoxy-2-(phenylmethoxymethyl)oxan-3-yl]oxy-3,5-diacetyloxy-6-(benzoyloxymethyl)oxan-4-yl]oxy-4-acetyloxy-6-[(1S,2R)-1,2,3-triacetyloxypropyl]oxane-2-carboxylate