(2S,4S)-N-(tert-butyldiphenylsilyl)-4-(ethylamino)-2-methyl-1,1-dioxo-2H,3H,4H-1λ
6-thieno[2,3-b]thiopyran-6-sulfonamide 、
ethyl ({[(2,5-dioxopyrrolidin-1-yl)oxy]carbonyl}oxy)acetate 在
吡啶 、
4-二甲氨基吡啶 作用下,
以
四氢呋喃 为溶剂,
反应 16.0h,
生成 ethyl 2-({[(2S,4S)-6-[(tert-butyldiphenylsilyl)sulfamoyl]-2-methyl-1,1-dioxo-6-2H,3H,4H-1λ
6-thieno[2,3-b]thiopyran-4-yl](ethyl)carbamoyl}oxy)acetate