(R)-3-(2,3-bis(palmitoyloxy)propylthio)-2-(tert-butoxycarbonylamino)propanoic acid 、
N5,N10-diBoc-N14-[4-((6-amino-2-(butylamino)-8-hydroxy-9H-purin-9-yl)methyl)-N-(2-amino-2-oxoethyl)benzamido]spermine 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
N,N-二甲基甲酰胺 为溶剂,
以36%的产率得到(20R)-1-(4-((6-amino-2-(butylamino)-8-hydroxy-9H-purin-9-yl)methyl)phenyl)-9, 14-bis (tert-butoxycarbonyl)-20-(tert-butoxycarbonylamino)-1,4,19-trioxo-22-thia-2,5,9,14,18-pentaazapentacosane-24,25-diyl dipalmitate