benzyl 3,4,6-tri-O-benzyl-α-D-mannopyranoside 、
ethyl 4-O-acetyl-3,6-di-O-benzyl-2-deoxy-2-phthalimido-1-thio-β-D-glucopyranoside 在
N-碘代丁二酰亚胺 、
三氟甲磺酸 、 MS 3 Angstroem 作用下,
以
乙腈 为溶剂,
以95%的产率得到Acetic acid (2R,3S,4R,5R,6S)-4-benzyloxy-2-benzyloxymethyl-5-(1,3-dioxo-1,3-dihydro-isoindol-2-yl)-6-((2S,3S,4S,5R,6R)-2,4,5-tris-benzyloxy-6-benzyloxymethyl-tetrahydro-pyran-3-yloxy)-tetrahydro-pyran-3-yl ester