1-acetamido-3-[[(2S)-2-amino-3-methyl-butanoyl]amino]urea hydrochloride 、
2,7-bis{3-[(3-aminophenyl)carbamoyl]propoxy}naphthalene 在
1-羟基苯并三唑 、 O-(1H-benzotriazol-1-yl)-N,N,N',N'-tetramethyluronium hexafluorophosphate 、
N,N-二异丙基乙胺 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
以69%的产率得到N-[(1S)-1-[(acetamidocarbamoylamino)carbamoyl]-2-methyl-propyl]-4-[[7-[4-[[(1S)-1-[(acetamidocarbamoylamino)carbamoyl]-2-methyl-propyl]amino]-4-oxo-butoxy]-2-naphthyl]oxy]butanamide