Synthesis and transformations of 4-phenylethynyl- and 4-styrylpyrazolo[5,1-c][1,2,4]triazines

Non-aromatic azolo[5,1-c][1,2,4]triazines: a pot, atom and step economic (PASE) synthesis, mechanistic insight and fluorescence properties

“…5 However several examples of dihydroazolo [5,1-c] [1,2,4]triazines were obtained when trisubstituted enamines were used. 5,6,8 1,4-Dihydroazolo [5,1-c] [1,2,4]triazines previously described in the literature [11][12][13][14][15][16][17][18][19] were synthesized through the reaction of diazoazoles with CH-acids and subsequent intramolecular cyclization of hydrazone intermediates. [11][12][13][14][15] These compounds are attractive due to the wide spectrum of their biological activity.…”