On September 13, 2004, Jin, Tienan; Kamijo, Shin; Yamamoto, Yoshinori published an article.Formula: C9H9N3 The title of the article was Copper-catalyzed synthesis of N-unsubstituted 1,2,3-triazoles from nonactivated terminal alkynes. And the article contained the following:
The [3 + 2]-cycloaddition of nonactivated terminal alkynes and trimethylsilyl azide proceeded smoothly in the presence of Cu1 catalyst to give N-unsubstituted triazoles, e.g., I, in good to high yields. The reaction most probably proceeded through the in situ formation of a copper acetylide species and hydrazoic acid, followed by a successive [3 + 2]-cycloaddition reaction. The experimental process involved the reaction of 4-(p-Tolyl)-1H-1,2,3-triazole(cas: 5301-96-2).Formula: C9H9N3
The Article related to alkyne silyl azide cycloaddition copper, triazole preparation, copper cycloaddition catalyst, Heterocyclic Compounds (More Than One Hetero Atom): Other 5-Membered Rings, Two Or More Hetero Atoms and other aspects.Formula: C9H9N3
Referemce:
1,2,3-Triazole – Wikipedia,
Triazoles – an overview | ScienceDirect Topics