Synthests and Biological Evaluation of a Series of Substituted-2-Pyridine-<u>C</u>-Nucleosides. Part II

Abstract A cyclistation reaction of the D-allo- and D-altro isomers of 2-(2, 4:3, 5′-di-O-benzylidenepentitol-1-yl)pyridine derivatives to afford the corresponding substituted 2-(D-ribofuranosyl) pyridine-C-nucleosides, was investigated. The latter compounds were obtained in good yield (90%) if the reaction was performed in 1 N HCI. The structures were confirmed by 13C-NMR studies and an HPLC method with was developed specifically for a determination of their purity. All compounds were evaluated for biological activity in a variety of antiviral and antitumor cell systems in vitro.