3-hydroxy-5-((5-hydroxy-1,4,5,6-tetrahydropyrimidin-2-yl)amino)benzoic acid 、 ethyl (3R)-3-(N-Gly)amino-3-(3,5-dichloro-2-hydroxyphenyl)propionate hydrochloride 在
N-甲基吗啉 、
氯甲酸异丁酯 作用下,
以
DMF (N,N-dimethyl-formamide) 为溶剂,
反应 0.25h,
以31%的产率得到ethyl (3R)-3-(3,5-dichloro-2-hydroxyphenyl)-3-[(N-{3-hydroxy-5-[(5-hydroxy-1,4,5,6-tetrahydropyrimidin-2-yl)amino]benzoyl}glycyl)amino]propanoate trifluoroacetate