(E)-methyl 2-((thiophen-2-yl)methyleneamino)acetate 、
(E)-β-acetylvinyl phenyl sulphone 在
(S)-(+)-5,5'-双[二(3,5-二叔丁基-4-甲氧基苯基)膦]-4,4'-二-1,3-苯并二氧戊环 、 tetrakis(actonitrile)copper(I) hexafluorophosphate 、
三乙胺 作用下,
以
乙醚 为溶剂,
反应 20.0h,
生成
methyl (2R,3S,4S,5S)-3-acetyl-4-(benzenesulfonyl)-5-thiophen-2-ylpyrrolidine-2-carboxylate 、
(2SR,3SR,4SR,5SR)-methyl 4-acetyl-3-(phenylsulfonyl)-5-(thiophen-2-yl)pyrrolidine-2-carboxylate 、 (2S,3R,4R,5S)-methyl 4-acetyl-3-(phenylsulfonyl)-5-(thiophen-2-yl)pyrrolidine-2-carboxylate