Synthesis of 1,2,3-triazolyl nucleoside analogs as potential anti-influenza A (H3N2 subtype) virus agents.

Montmorillonite K10 impregnated with copper dichloride and potassium iodide (CuCl2 /KI/K10) was used as catalyst in the cycloaddition of azides and propargylnucleobases, to provide the corresponding 1,4-disubstituted 1,2,3-triazoles in good yield. All compounds 16-23 were evaluated for their antiviral activity in vitro. Compound 18 showed moderate inhibition against influenza virus A (H3N2).