Transition metal-free steric controlled one-pot synthesis of highly substituted N-amino 1,2,3-triazole derivatives via diazo transfer reaction from β-keto esters

An efficient, simple protocol for the one-pot synthesis of N-amino 1,2,3-triazole from β-keto esters has been described. This method involves diazo transfer reaction into in situ generated hydrazones using imidazole sulfonyl azide as the nitrogen source. This protocol does not involve any transition metal and can be regarded as a general method for the synthesis of N-amino 1,2,3-triazole from hydrazones.134