benzyl 2-[[(2S)-5-[[amino-[(4-methoxy-2,3,6-trimethylphenyl)sulfonylamino]methylidene]amino]-2-[[2-[(2R,5S)-5-(aminomethyl)-4-[[4-[[(4-methoxy-2,3,6-trimethylphenyl)sulfonylamino]methyl]phenyl]methyl]-3,6-dioxopiperazin-2-yl]acetyl]amino]pentanoyl]amino]acetate 、
N-苄氧羰基-L-天门冬氨酸 4-叔丁酯 在
1-羟基苯并三唑 、
N,N-二异丙基乙胺 、 Methanaminium,N-[(dimethylamino)(3H-1,2,3-triazolo[4,5-b]pyridin-3-yloxy)methylene]-N-methyl-, hexafluorophosphate(1-) 作用下,
以
N,N-二甲基甲酰胺 为溶剂,
以1.43 g的产率得到tert-butyl (3S)-4-[[(2S,5R)-5-[2-[[(2S)-5-[[amino-[(4-methoxy-2,3,6-trimethylphenyl)sulfonylamino]methylidene]amino]-1-oxo-1-[(2-oxo-2-phenylmethoxyethyl)amino]pentan-2-yl]amino]-2-oxoethyl]-1-[[4-[[(4-methoxy-2,3,6-trimethylphenyl)sulfonylamino]methyl]phenyl]methyl]-3,6-dioxopiperazin-2-yl]methylamino]-4-oxo-3-(phenylmethoxycarbonylamino)butanoate