(2R)-3-methyl-2-[(5-oxo-1-phenylmethoxycarbonyl-2,6-dihydropyridin-3-yl)amino]butanoic acid 、
methyl (2S)-6-[(2-methylpropan-2-yl)oxycarbonylamino]-2-[(5-oxo-2,6-dihydro-1H-pyridin-3-yl)amino]hexanoate 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63%的产率得到benzyl 3-[[(2R)-1-[3-[[(2S)-1-methoxy-6-[(2-methylpropan-2-yl)oxycarbonylamino]-1-oxohexan-2-yl]amino]-5-oxo-2,6-dihydropyridin-1-yl]-3-methyl-1-oxobutan-2-yl]amino]-5-oxo-2,6-dihydropyridine-1-carboxylate