TFA*Me2N-D-Ile-Hic-OH 、
(2S)-2-amino-N-[(E,2S)-5-[(2S)-3-methoxy-2-methyl-5-oxo-2H-pyrrol-1-yl]-5-oxopent-3-en-2-yl]-4-methylpentanamide;2,2,2-trifluoroacetic acid 在
N-甲基吗啉 、 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 2.0h,
以100%的产率得到(S)-1-(((S)-1-(((S,E)-5-((S)-3-methoxy-2-methyl-5-oxo-2,5-dihydro-1H-pyrrol-1-yl)-5-oxopent-3-en-2-yl)amino)-4-methyl-1-oxopentan-2-yl)amino)-4-methyl-1-oxopentan-2-yl dimethyl-D-isoleucinate 2,2,2-trifluoroacetate