(3R,4R,1'S)-(-)-Methyl 3-(1'-acetylamino-2'-ethyl)butyl-4-aminocyclopent-1-en-1-carboxylate hydrochloride 、
1,3-二-BOC-2-(三氟甲基磺酰)胍 在
三乙胺 作用下,
以
二氯甲烷 为溶剂,
以3.9 g (60%)的产率得到(3R,4R,1'S)-(-)-Methyl 3-(1'-Acetylamino-2'-ethyl)butyl-4-[(tert-butoxycarbonylamino-tert-butoxycarbonylimino)methyl]aminocyclopent-1-en-1-carboxylate