Fmoc-O-苄基-L-丝氨酸 、
2',3',4',6'-Tetra-O-acetyl-β-D-galactopyranosyl-(1->3)-4,6-di-O-benzyl-D-galactal 在
N-碘代丁二酰亚胺 作用下,
以52%的产率得到(S)-3-Benzyloxy-2-(9H-fluoren-9-ylmethoxycarbonylamino)-propionic acid (2R,3S,4S,5S,6R)-5-benzyloxy-6-benzyloxymethyl-3-iodo-4-((2S,3R,4S,5S,6R)-3,4,5-triacetoxy-6-acetoxymethyl-tetrahydro-pyran-2-yloxy)-tetrahydro-pyran-2-yl ester