10.1021/ol702392x
The research focuses on the direct and versatile synthesis of rare nucleotide furanoses, specifically uridine 5'-diphosphofuranoses, from unprotected thioimidoyl furanosides. The study explores the diastereoselectivity of the reaction, influenced by factors such as reaction time, temperature, and the nature of the furanosyl donor. The experiments involved the use of thioimidates as efficient glycosylation donors and the acidic form of UDP (uridine 5'-diphosphate) as an acceptor, aiming to avoid the need for chemical activation. The reactants included various benzimidazolyl furanosides and UDP disodium salt dihydrate. The analysis was conducted using 31P NMR to monitor the phosphorylation reaction and assess the diastereoselectivity. The study also employed reverse-phase HPLC to separate and characterize the synthesized nucleotide furanoses, including the identification of anomers. The innovative aspect of this research is the one-step synthesis method that does not result in ring expansion to pyranose forms or the formation of UMP-furanoses, suggesting a potential approach closer to chemoenzymatic synthesis.