(R)-15-[N,N'-bis(tert-butoxycarbonyl)guanidino]-3-(methoxymethoxy)-pentadecanoic acid 、 H-Thr(1)-D-Val-Val-D-aThr(tBu)-D-Asn(Trt)-D-Ala-(1) 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
N,N-二甲基甲酰胺 为溶剂,
生成 tert-butyl N-[N'-[(13R)-15-[[(3R,6R,9R,12S,15R,18S,19R)-3,19-dimethyl-9-[(1R)-1-[(2-methylpropan-2-yl)oxy]ethyl]-2,5,8,11,14,17-hexaoxo-6-[2-oxo-2-(tritylamino)ethyl]-12,15-di(propan-2-yl)-1-oxa-4,7,10,13,16-pentazacyclononadec-18-yl]amino]-13-(methoxymethoxy)-15-oxopentadecyl]-N-[(2-methylpropan-2-yl)oxycarbonyl]carbamimidoyl]carbamate