Then, allenyl azides 2x and 3x of both pathways experience a cyclization. The relative free energies of TS2→4X (19.1-20.0. kcal / mol) and TS3→5X (16.3-20.1 kcal/mol) were lower than those corresponding to the first step of reaction. The cyclization reaction lead to triazafulvene intermediates 4x and 6x, that could be trapped by nucleophilic solvents to generate the stables NH-1,2,3-triazoles, 6x and 7x. The whole cascades of both pathways were exergonic.