methyl (2S)-2-[[1-[(2R)-3-methyl-2-[(5-oxo-2,6-dihydro-1H-pyridin-3-yl)amino]butanoyl]-5-oxo-2,6-dihydropyridin-3-yl]amino]-6-[(2-methylpropan-2-yl)oxycarbonylamino]hexanoate 、
(S)-2-乙酰胺基-6-((叔丁氧羰基)氨基)己酸 在
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,
反应 24.0h,
以61%的产率得到methyl (2S)-2-[[1-[(2R)-2-[[1-[(2S)-2-acetamido-6-[(2-methylpropan-2-yl)oxycarbonylamino]hexanoyl]-5-oxo-2,6-dihydropyridin-3-yl]amino]-3-methylbutanoyl]-5-oxo-2,6-dihydropyridin-3-yl]amino]-6-[(2-methylpropan-2-yl)oxycarbonylamino]hexanoate