p-tolyl 4,6-O-benzylidene-2,3-di-O-levulinoyl-1-thio-β-D-galactopyranoside 、
2,2,2-trichloroethyl N-[(2R,3R,4R,5S,6R)-2-(5-azidopentoxy)-4,5-dihydroxy-6-(phenylmethoxymethyl)oxan-3-yl]carbamate 、
p-methylphenyl 2,3,4-tri-O-benzyl-1-thio-β-L-fucopyranoside 在
N-碘代丁二酰亚胺 、
三氟甲磺酸 作用下,
以
二氯甲烷 为溶剂,
以47%的产率得到[(2S,4aR,6S,7R,8S,8aS)-6-[(2R,3S,4R,5R,6R)-6-(5-azidopentoxy)-4-[(2S,3S,4R,5R,6S)-6-methyl-3,4,5-tris(phenylmethoxy)oxan-2-yl]oxy-2-(phenylmethoxymethyl)-5-(2,2,2-trichloroethoxycarbonylamino)oxan-3-yl]oxy-7-(4-oxopentanoyloxy)-2-phenyl-4,4a,6,7,8,8a-hexahydropyrano[3,2-d][1,3]dioxin-8-yl] 4-oxopentanoate