(2S)-5-amino-2-[({2-oxo-1-[2-(trifluoromethyl)benzyl]-1,2-dihydropyridin-3-yl}carbonyl)amino]pentanoic acid trifluoroacetate 、
乙醇 、
乙基乙酰亚胺盐酸盐 以
三乙胺 为溶剂,
反应 2.0h,
以to give (2S)-5-(ethanimidoylamino)-2-[({2-oxo-1-[2-(trifluoromethyl)benzyl]-1,2-dihydropyridin-3-yl}carbonyl)amino]pentanoic acid•TFA (107, 0.170 g) as a white solid的产率得到(2S)-5-(ethanimidoylamino)-2-[({2-oxo-1-[2-(trifluoromethyl)benzyl]-1,2-dihydropyridin-3-yl}carbonyl)amino]pentanoic acid trifluoroacetate