C-Nucleosidations with 2,6-Diamino-5,8-diaza-7,9-dicarba-purine1
摘要:
Endocyclic iminium ions derived from (L)-4-amino-threose derivatives smoothly react with 2,6-diamino-5,8-diaza-7,9-dicarba-purine to give corresponding C(9)-nucleosides in high yields.
C-Nucleosidation with cyclic iminium salts occurring under mild reaction conditions and affording C-nucleosides that are isosteric with N-nucleosides of natural purines is shown to be a consistent property of the entire family of 2,6-(oxo or amino)-disubstituted 5,8-diaza-7,9-dicarba-purines.