Azide-tetrazole equilibrium of C-6 azidopurine nucleosides and their ligation reactions with alkynes.
Lakshman MK, Singh MK, Parrish D, Balachandran R, Day BW. Azide-tetrazole equilibrium of C-6 azidopurine nucleosides and their ligation reactions with alkynes. J Org Chem. 2010 Apr 16; 75(8):2461-73.