Synthesis of phosphonate derivatives of methylenecyclopropane nucleoside analogues by alkylation–elimination method and unusual opening of cyclopropane ring
作者:Hui-Ping Guan、Yao-Ling Qiu、Mohamad B. Ksebati、Earl R. Kern、Jiri Zemlicka
DOI:10.1016/s0040-4020(02)00589-6
日期:2002.7
were then used for alkylation–elimination of nucleic acid bases (adenine) or precursors (2-amino-6-chloropurine and N4-acetylcytosine). The intermediary Z+E-isomers 22a+23a and 22b+23b were dealkylated with bromo- of iodotrimethylsilane to free phosphonicacids 15a, 16a and phosphonate with an open cyclopropane ring 25 which were separated by ion exchange chromatography on Dowex 1. Phosphonate diesters