2-氨基-1,4,5,6-四氢嘧啶 、
4-{4-[(2S)-2-tert-butoxycarbonyl-2-(4-trifluoromethylbenzenesulfonylamino)-ethyl]-phenoxy}-butyric acid 在
N,N-二异丙基乙胺 、 Methanaminium,N-[(dimethylamino)(3H-1,2,3-triazolo[4,5-b]pyridin-3-yloxy)methylene]-N-methyl-, hexafluorophosphate(1-) 作用下,
以
四氢呋喃 为溶剂,
以37.3 mg的产率得到(2S)-3-{4-[3-(1,4,5,6-tetrahydropyrimidin-2-ylcarbamoyl)-propoxy]-phenyl}-2-(4-trifluoromethylbenzenesulfonylamino)-propionic acid tert-butyl ester