Regioselective quaternization of N-alkyl-4-nitro- 1,2,3-triazoles in ButOH–HClO4 system

Quaternization of N -alkyl-4-nitro-1,2,3-triazoles in Bu t OH–HClO 4 as a source of tert -butyl cation affords 1- tert -butyl-3-alkyl-4-nitro- 1,2,3-triazolium perchlorates.