3-[(5-fluoro-1,4,5,6-tetrahydro-2-pyrimidinyl)amino]-5-hydroxybenzoic acid hydrochloride 、 ethyl (3R)-3-(N-Gly)amino-3-(5-chloro-2-hydroxy-3-iodophenyl)propionate hydrochloride 在
O-(1H-benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium hexafluorophosphate 、
N,N-二异丙基乙胺 、
N-甲基吗啉 作用下,
以
DMF (N,N-dimethyl-formamide) 为溶剂,
反应 2.0h,
以30%的产率得到(β1R)-3-iodo-5-chloro-β-[[[[3-[(5-fluoro-1,4,5,6-tetrahydro-2-pyrimidinyl)amino]-5-hydroxybenzoyl]amino]acetyl]amino]-2-hydroxybenzenepropanoic acid ethyl ester monotrifluoroacetate