Phenyl 2,3,4,6-tetra-O-benzyl-α-D-mannopyranosyl-(1->3)-2-O-benzyl-4,6-O-benzylidene-1-seleno-α-D-mannopyranoside 、
8-Methoxycarbonyloctyl 2,3,4,6-tetra-O-benzyl-α-D-mannopyranosyl-(1->2)-3,4,6-tri-O-benzyl-α-D-mannopyranosyl-(1->3)-2,4-di-O-benzyl-β-D-mannopyranoside 在
N-碘代丁二酰亚胺 、
三氟甲磺酸 、 4 A molecular sieve 作用下,
以
乙醚 、
二氯甲烷 为溶剂,
以70%的产率得到methyl 9-[(2R,3S,4S,5R,6R)-6-[[(2R,4aR,6S,7S,8S,8aR)-2-phenyl-7-phenylmethoxy-8-[(2R,3S,4S,5R,6R)-3,4,5-tris(phenylmethoxy)-6-(phenylmethoxymethyl)oxan-2-yl]oxy-4,4a,6,7,8,8a-hexahydropyrano[3,2-d][1,3]dioxin-6-yl]oxymethyl]-4-[(2R,3S,4S,5R,6R)-4,5-bis(phenylmethoxy)-6-(phenylmethoxymethyl)-3-[(2R,3S,4S,5R,6R)-3,4,5-tris(phenylmethoxy)-6-(phenylmethoxymethyl)oxan-2-yl]oxyoxan-2-yl]oxy-3,5-bis(phenylmethoxy)oxan-2-yl]oxynonanoate