Réactions des Méthylazide et Phénylazide Avec Quelques Alcynes et Oléfines α‐Nitrées. Synthèse Régiospécifique des 1,2,3 Triazoles

The reactions of alkynes and α‐nitro‐olefines with methylazide and phenylazide was studied. In contrast to known reactions with alkynes which are non‐regioselective, methylazide and phenylazide react regiospecifically with α‐nitro‐olefines and give only one type of triazole after elimination of HNO2. These reactions are very useful synthetic approaches to 1,2,3 triazoles.