Abstract
2′- O-aminopropyl modified 4,6-difluoro-substituted benzimidazole nucleosides were synthesized in a two-step synthesis via Michael reaction and a Raney-nickel catalyzed reduction in high yields. These building blocks were used as a starting point for the conjugation of different carboxylic acids to enhance the lipophilicity or cationic character of oligonucleotides when used in biological assays or medical applications.
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