8-methoxycarbonyloctyl 3,4,6-tri-O-acetyl-2-amino-2-deoxy-β-D-glucopyranoside 、
methyl α-D-galactopyranosiduronic acid 在
O-Benzotriazol-1-yl-N,N,N',N'-bis(tetramethylene)uronium hexafluorophosphate 、
三乙胺 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
以51%的产率得到9-{(2R,3R,4R,5S,6R)-4,5-Diacetoxy-6-acetoxymethyl-3-[((2S,3R,4S,5R,6S)-3,4,5-trihydroxy-6-methoxy-tetrahydro-pyran-2-carbonyl)-amino]-tetrahydro-pyran-2-yloxy}-nonanoic acid methyl ester