(2S)-2-[[(2S)-2-[[(2S,3S)-2-[[(2R,3R,5S)-5-[tert-butyl(dimethyl)silyl]oxy-2-hydroxy-3-[[(2S)-2-[(2-methylpropan-2-yl)oxycarbonylamino]propanoyl]amino]dodecanoyl]amino]-3-phenylselanylbutanoyl]amino]-3-methylbutanoyl]amino]-5-(4-methoxyphenyl)pentanoic acid 、
tert-butyl 2-[[(2S)-2-[[(2R,3S)-2-[[(2S)-2-[[(2S,3R)-2-amino-3-hydroxybutanoyl]-methylamino]-4-oxo-4-(tritylamino)butanoyl]amino]-3-phenylselanylbutanoyl]amino]-5-oxo-5-(tritylamino)pentanoyl]-methylamino]acetate 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
二氯甲烷 、
N,N-二甲基甲酰胺 为溶剂,
以58%的产率得到tert-butyl 2-[[(2S)-2-[[(2R,3S)-2-[[(2S)-2-[[(2S,3R)-2-[[(2S)-2-[[(2S)-2-[[(2S,3S)-2-[[(2R,3R,5S)-5-[tert-butyl(dimethyl)silyl]oxy-2-hydroxy-3-[[(2S)-2-[(2-methylpropan-2-yl)oxycarbonylamino]propanoyl]amino]dodecanoyl]amino]-3-phenylselanylbutanoyl]amino]-3-methylbutanoyl]amino]-5-(4-methoxyphenyl)pentanoyl]amino]-3-hydroxybutanoyl]-methylamino]-4-oxo-4-(tritylamino)butanoyl]amino]-3-phenylselanylbutanoyl]amino]-5-oxo-5-(tritylamino)pentanoyl]-methylamino]acetate