(2S,4R)-5-{[(benzyloxy)carbonyl]amino}-2-[(tert-butoxycarbonyl)amino]-4-{[tert-butyl(dimethyl)silyl]oxy}pentanoic acid 、 2-(trimethylsilyl)ethyl 3-[3'-[(2S)-2-amino-3-({(1S)-2-(benzyloxy)-1-[4-(benzyloxy)benzyl]-2-oxoethyl} amino)-3-oxopropyl]-4,4'-bis(benzyloxy)biphenyl-3-yl]-2-{[(benzyloxy)carbonyl]amino}propanoate hydrochloride 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
DMF (N,N-dimethyl-formamide) 为溶剂,
反应 96.0h,
以70%的产率得到benzyl (6R,8S,11S,14S)-14-[4-(benzyloxy)benzyl]-11-[(4,4'-bis(benzyloxy)-3'-{2-{ [(benzyloxy) carbonyl]amino}-3-oxo-3-[2-(trimethylsilyl)ethoxy]propyl}biphenyl-3-yl)methyl]-8-[(tert-butoxycarbonyl)amino]-6-([tert-butyl(dimethyl)silyl]oxy)-3,9,12-trioxo-1-phenyl-2-oxa-4,10,13-triazapentadecan-15-oate