benzyl 4-[({(2S)-2-[(tert-butoxycarbonyl)amino]propanoyl}amino)methyl]benzoate 、
(2R,4S,5S)-4-{[tert-butyl(dimethyl)silyl]oxy}-5-{[3-(1,1-dioxo-1,6-isothiazolidin-2-yl)benzoyl]amino}-2,7-dimethyloctanoic acid 在
盐酸 、
水 、
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
乙酸乙酯 、 DMF (N,N-dimethyl-formamide) 为溶剂,
反应 6.0h,
以71%的产率得到benzyl 4-[(4S,7R,9S)-9-((1S)-1-{[3-(1,1-dioxo-1,6-isothiazolidin-2-yl)benzoyl]amino}-3-methylbutyl)-4,7,11,11,12,12-hexamethyl-3,6-dioxo-10-oxa-2,5-diaza-11-silatridec-1-yl]benzoate