Methyl 2(S)-butylsulfonylamino-4-aminobutyrate hydrochloride 、 1(S)-[(2-(N-t-Butyloxycarbonylpiperidin-4-yl)ethyl)acetamido]-2(S)-carboxycyclopropane 在
(benzotriazo-1-yloxy)tris(dimethylamino)phosphonium hexafluorophosphate 、
三乙胺 作用下,
以
乙酸乙酯 、
乙腈 为溶剂,
生成 1(S)-[2-(N-t-Butyloxycarbonylpiperidin-4-yl)ethyl]-2(S)-[methyl4-(2(S)-butylsulfonylamino)butyl]cyclopropane dicarboxamide