1-萘乙酸 、
(2R,3R,4S)-4-((S)-2-Amino-3,3-dimethyl-butyrylamino)-3-hydroxy-5-phenyl-2-(3,4,5-trimethoxy-benzylamino)-pentanoic acid [(S)-1-(2-hydroxy-4-methoxy-benzylcarbamoyl)-2-methyl-propyl]-amide 在
O-(1,2-dihydro-2-oxo-1-pyridyl)-N,N,N',N'-tetramethyluronium tetrafluoroborate 、
N,N-二异丙基乙胺 作用下,
以
N,N-二甲基乙酰胺 为溶剂,
生成 (2S)-N-[(2S,3R,4R)-3-hydroxy-5-[[(2S)-1-[(2-hydroxy-4-methoxyphenyl)methylamino]-3-methyl-1-oxobutan-2-yl]amino]-5-oxo-1-phenyl-4-[(3,4,5-trimethoxyphenyl)methylamino]pentan-2-yl]-3,3-dimethyl-2-[(2-naphthalen-1-ylacetyl)amino]butanamide