2-[[(2S)-5-[[amino-[(4-methoxy-2,3,6-trimethylphenyl)sulfonylamino]methylidene]amino]-2-[[2-[(2R,5S)-5-[[[(2S)-2-amino-4-[(2-methylpropan-2-yl)oxy]-4-oxobutanoyl]amino]methyl]-1-[[4-[[(4-methoxy-2,3,6-trimethylphenyl)sulfonylamino]methyl]phenyl]methyl]-3,6-dioxopiperazin-2-yl]acetyl]amino]pentanoyl]amino]acetic acid 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68%的产率得到tert-butyl 2-[(1S,5S,11S,15R)-11-[3-[[amino-[(4-methoxy-2,3,6-trimethylphenyl)sulfonylamino]methylidene]amino]propyl]-16-[[4-[[(4-methoxy-2,3,6-trimethylphenyl)sulfonylamino]methyl]phenyl]methyl]-4,7,10,13,17,19-hexaoxo-3,6,9,12,16,18-hexazabicyclo[13.2.2]nonadecan-5-yl]acetate