(2S)-5-amino-2-({[5-(diphenylmethyl)thiophen-2-yl]carbonyl}amino)pentanoic acid trifluoroacetate 、
乙醇 、
乙基环丙烷甲亚氨酸酯盐酸盐(1:1) 以
三乙胺 为溶剂,
反应 16.0h,
以to give (2S)-5-{[cyclopropyl(imino)methyl]amino}-2-({[5-(diphenylmethyl)thiophen-2-yl]carbonyl}amino)pentanoic acid•TFA (121, 84.2 mg) as an off-white solid的产率得到(2S)-5-{[cyclopropyl(imino)methyl]amino}-2-({[5-(diphenylmethyl)thiophen-2-yl]carbonyl}amino)pentanoic acid trifluoroacetate