(2S)-5-amino-2-({[5-(diphenylmethyl)thiophen-2-yl]carbonyl}amino)pentanoic acid trifluoroacetate 、
乙醇 、
3-乙氧基-3-亚氨基丙酸乙酯盐酸盐 以
三乙胺 为溶剂,
反应 16.0h,
以to give (2S)-2-({[5-(diphenylmethyl)thiophen-2-yl]carbonyl}amino)-5-[(3-ethoxy-3-oxopropanimidoyl)amino]pentanoic acid•TFA (123, 80 mg) as an off-white solid的产率得到(2S)-2-({[5-(diphenylmethyl)thiophen-2-yl]carbonyl}amino)-5-[(3-ethoxy-3-oxopropanimidoyl)amino]pentanoic acid trifluoroacetate