2-amino-N-[(1-{2-[(1-phenethyl-piperidin-4-yl)-phenyl-carbamoyl]-ethylcarbamoyl}-2-phenyl-ethylcarbamoyl)-methyl]-propionamide 在
N,N-二异丙基乙胺 、
N,N'-二环己基碳二亚胺 、
三氟乙酸 作用下,
以
二氯甲烷 为溶剂,
生成 (S)-2-amino-3-(4-hydroxy-phenyl)-N-((R)-1-{[((S)-1-{2-[(1-phenethyl-piperidin-4-yl)-phenyl-carbamoyl]-ethylcarbamoyl}-2-phenyl-ethylcarbamoyl)-methyl]-carbamoyl}-ethyl)-propionamide