3,6-di-O-benzyl-(-)-allosamizoline 、
phenyl 3,6-di-O-acetyl-4-O-(3,4,6-tri-O-acetyl-2-deoxy-2-phthalimido-β-D-allopyranosyl)-2-deoxy-2-phthalimido-1-thio-β-D-allopyranoside 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40%的产率得到[(2R,3S,4S,5R,6R)-6-[[(3aS,4R,5R,6S,6aS)-2-(dimethylamino)-4-phenylmethoxy-6-(phenylmethoxymethyl)-4,5,6,6a-tetrahydro-3aH-cyclopenta[d][1,3]oxazol-5-yl]oxy]-4-acetyloxy-3-[(2S,3R,4S,5S,6R)-4,5-diacetyloxy-6-(acetyloxymethyl)-3-(1,3-dioxoisoindol-2-yl)oxan-2-yl]oxy-5-(1,3-dioxoisoindol-2-yl)oxan-2-yl]methyl acetate