methyl 6-O-benzyl-2-deoxy-2-phthalimido-β-D-glucopyranoside 、
phenyl 3,4,6-tri-O-acetyl-2-deoxy-2-phthalimido-1-thio-β-D-galactopyranoside 在
N-碘代丁二酰亚胺 、
三氟甲磺酸 、 4 A molecular sieve 作用下,
以
二氯甲烷 为溶剂,
以73%的产率得到Acetic acid (2R,3R,4R,5R,6S)-3-acetoxy-2-acetoxymethyl-6-[(2R,3S,4R,5R,6R)-2-benzyloxymethyl-5-(1,3-dioxo-1,3-dihydro-isoindol-2-yl)-4-hydroxy-6-methoxy-tetrahydro-pyran-3-yloxy]-5-(1,3-dioxo-1,3-dihydro-isoindol-2-yl)-tetrahydro-pyran-4-yl ester