(S)-2-((2S,3R)-3-(4-((4-((S)-3-(allyloxy)-2-((S)-2-((2S,3R)-3-(4-((4-((S)-2-amino-3-methoxy-3-oxopropyl)phenoxy)methyl)-1H-1,2,3-triazol-1-yl)-1-((S)-2-((S)-2-((tert-butoxycarbonyl)(methyl)amino)propanamido)-3,3-dimethylbutanoyl)-pyrrolidine-2-carboxamido)-3-(naphthalen-2-yl)propanamido)-3-oxopropyl)-phenoxy)methyl)-1H-1,2,3-triazol-1-yl)-1-((S)-2-((S)-2-((tert-butoxycarbonyl)-(methyl)amino)propanamido)-3,3-dimethylbutanoyl)pyrrolidine-2-carboxamido)-3-(naphthalen-2-yl)propanoic acid 在
N,N-二异丙基乙胺 、 N-[(dimethylamino)-3-oxo-1H-1,2,3-triazolo[4,5-b]pyridin-1-yl-methylene]-N-methylmethanaminium hexafluorophosphate 作用下,
以84%的产率得到40-O-methyl 18-O-prop-2-enyl (8R,12S,15S,18S,30R,34S,37S,40S)-11,33-bis[(2S)-3,3-dimethyl-2-[[(2S)-2-[methyl-[(2-methylpropan-2-yl)oxycarbonyl]amino]propanoyl]amino]butanoyl]-15,37-bis(naphthalen-2-ylmethyl)-13,16,35,38-tetraoxo-2,24-dioxa-5,6,7,11,14,17,27,28,29,33,36,39-dodecazaheptacyclo[40.2.2.220,23.14,7.126,29.08,12.030,34]pentaconta-1(45),4(50),5,20,22,26(47),27,42(46),43,48-decaene-18,40-dicarboxylate