Synthesis and properties of 5-aryl-3-diazo-3H-pyrazoles and 3-aryl-1H-pyrazole-5-diazonium salts. Preparation and cytolytic activity studies of 2-arylpyrazolo-[5,1-c][1,2,4]benzotriazines

Isoxazolyl-Derived 1,4-Dihydroazolo[5,1-c][1,2,4]Triazines: Synthesis and Photochemical Properties

“…The reaction of azole diazonium salts 1 [ 24 ] with heterocyclic enamines 2 and 3 leads to azolo[5,1- c ][1,2,4]triazines 4 and 5 [ 25 ] ( Scheme 1 ). Analogous azolotriazines were synthesized previously by using enamines, obtained from various secondary linear N , N -dialkylamines, and cyclic amines—pyrrolidine, piperidine, morpholine [ 26 , 27 , 28 , 29 , 30 , 31 , 32 , 33 , 34 , 35 ].…”

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

“…In the current work, we studied the reaction of 4-substituted 5-diazoazoles (diazopyrazole and diazoimidazoles) with N,Ndimethyl-2-(1,2,3-thiadiazol-5-yl)ethen-1-amines to enlarge the scope of the azolotriazines. Since we previously showed 21,22 that spectroscopy data are a convenient tool for differentiation between the two active diazo components, 23 we applied NMR and IR spectroscopy to confirm the structure of the diazo component and monitor the reaction pathways and intermediates formation.…”