methyl 5-azido-5-deoxy-2,3-O-isopropylidene-b-ribofuranoside 、
(2R,3S,4R)-N-tert-butoxycarbonyl-2-formyl-3,4-O-isopropylidenepyrrolidine-3,4-diol 、
巯基乙酸 在
三苯基膦 作用下,
以
甲苯 为溶剂,
反应 12.5h,
以70%的产率得到(3aS,4R,6aR)-tert-butyl 4-((R)-3-(((3aR,4R,6R,6aR)-6-methoxy-2,2-dimethyltetrahydrofuro[3,4-d][1,3]dioxol-4-yl)methyl)-4-oxothiazolidin-2-yl)-2,2-dimethyldihydro-3aH-[1,3]dioxolo[4,5-c]pyrrole-5(4H)-carboxylate