5-chloro-2-(3,5-dimethyl-piperidin-1-yl)-benzoic acid 、 (2S)-amino-3-(2'-phenoxy-biphenyl-4-yl)-propionic acid methyl ester hydrochloride salt 、
2-(1h-Benzotriazole-1-yl)-1,1,3,3-tetramethyluronium hexafluorophosphate 、
N,N-二异丙基乙胺 在
crude product 、 silica gel 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
以to give 0.435 g (62%) of 2-[5-Chloro-2-(3,5-dimethyl-piperidin-1-yl)-benzoylamino]-3-(2′-phenoxy-biphenyl-4-yl)-propionic acid methyl ester的产率得到2-[5-Chloro-2-(3,5-dimethyl-piperidin-1-yl)-benzoylamino]-3-(2'-phenoxy-biphenyl-4-yl)-propionic acid methyl ester