乙醛酸乙酯 、
(R)-(-)-丙烯酰-2,10-樟脑磺内酰胺 、
5-(tert-butyldiphenylsilyl)-1-deoxy-1-hydroxyamino-2,3-O-isopropylidene-β-D-ribo-1,4-pentofuranose 以
甲苯 为溶剂,
反应 40.0h,
以57%的产率得到(3R,5R)-2-[5-(tert-butyldiphenylsilyl)-1-deoxy-2,3-O-isopropylidene-β-D-ribo-1,4-pentofuranos-1-yl]-5-[(1S,5R,7R)-10,10-dimethyl-3,3-dioxo-3λ
6-thia-4-azatriciclo[5.2.1.0
1,5]decane-4-carbonyl]-isoxazolidine-3-carboxylic acid ethyl ester