(2S)-5-amino-2-({[1-(2-chlorobenzyl)-2-oxo-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)-2-({[1-(2-chlorobenzyl)-2-oxo-1,2-dihydropyridin-3-yl]carbonyl}amino)-5-(ethanimidoylamino)pentanoic acid•TFA (104, 300 mg) as a white solid的产率得到(2S)-2-({[1-(2-chlorobenzyl)-2-oxo-1,2-dihydropyridin-3-yl]carbonyl}amino)-5-(ethanimidoylamino)pentanoic acid trifluoroacetate