2,3,4,6-tetra-O-benzyl-α-D-mannopyranosyl trichloroacetimidate 、
N-benzyloxycarbonyl-7-O-tert-butyldimethylsilyl-1,5-di-O-benzyl-2,6-dideoxy-2,6-imino-D-glycero-D-talo-heptitol 在
三氟甲磺酸 作用下,
以
二氯甲烷 为溶剂,
反应 24.0h,
以5%的产率得到benzyl (2R,3R,4R,5R,6S)-2-[[tert-butyl(dimethyl)silyl]oxymethyl]-5-hydroxy-3-phenylmethoxy-6-(phenylmethoxymethyl)-4-[(2R,3S,4S,5R,6R)-3,4,5-tris(phenylmethoxy)-6-(phenylmethoxymethyl)oxan-2-yl]oxypiperidine-1-carboxylate