(R)-3-(2,3-bis(palmitoyloxy)propylthio)-2-(tert-butoxycarbonylamino)propanoic acid 、
(S)-20-amino-9,14-bis(tert-butoxycarbonyl)-2,2-dimethyl-4,19-dioxo-3-oxa-5,9,14,18-tetraazahenicosan-21-yl-4-((6-amino-2-(butylamino)-8-hydroxy-9H-purin-9-yl)methyl)benzoate 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45%的产率得到(20S,23R)-20-((4-((6-amino-2-(butylamino)-8-hydroxy-9H-purin-9-yl)methyl)benzoyloxy)methyl)-9,14-bis(tert-butoxycarbonyl)-23-(tert-butoxycarbonylamino)-2,2-dimethyl-4,19,22-trioxo-3-oxa-25-thia-5,9,14,18,21-pentaazaoctacosane-27,28-diyl dipalmitate