(2R,3S,4R)-N-tert-butoxycarbonyl-2-formyl-3,4-O-isopropylidenepyrrolidine-3,4-diol 、
巯基乙酸 、
methyl 6-azido-6-deoxy-2,3,4-tri-O-benzoyl-α-D-glucopyranoside 在
三苯基膦 作用下,
以
甲苯 为溶剂,
反应 12.5h,
以72%的产率得到(2R,3R,4S,5R,6S)-2-(((R)-2-((3aS,4R,6aR)-5-(tert-butoxycarbonyl)-2,2-dimethyltetrahydro-3aH-[1,3]dioxolo[4,5-c]pyrrol-4-yl)-4-oxothiazolidin-3-yl)methyl)-6-methoxytetrahydro-2H-pyran-3,4,5-triyl tribenzoate