A novel type of nucleotide analogues, the 2′,3′-O-(1-diethylphosphono)alkylidene derivatives of ribonucleosides was prepared by redox reaction of diethyl chlorophosphite with various nucleoside orthoesters. Some of these compounds undergo interesting rearrangements when treated with nucleophiles. The configuration of the title compounds was determined by 2D-ROESY experiments. Biological activity of
Redox reaction of chlorodiethylphosphite with nucleoside orthoesters results in efficient synthesis of 2′, 3′- or 3′, 5′-O-((1-diethylphosphono)aralkyl)methylene derivatives of nucleosides as a novel type of isopolar phosphonate-based nucleotide analogues. The configuration of products was determined by 2D-ROESY NMR experiments.