Collect. Czech. Chem. Commun.
1994, 59, 222-226
https://doi.org/10.1135/cccc19940222
Synthesis of Some 1,2,4-Triazolo[4,3-c]quinazolines Based on 4-Quinazolylthiosemicarbazides
Katarína Špirková, Štefan Stankovský and Miloslava Dandárová
Department of Organic Chemistry, Slovak Technical University, 812 37 Bratislava, Slovak Republic
Abstract
The paper describes the cyclization reactions of substituted 1-(4'-quinazolyl)-4-phenylthiosemicarbazides (Ia - Ie). The thermal intramolecular cyclization gives 2H-1,2,4-triazolo[4,3-c]quinazoline-3-thiones (IIa - IId). Heating of I with HgO gives 3-anilino-1,2,4-triazolo[4,3-c]quinazolines (IIIa - IIIe). The IR and 1H NMR spectra of the compounds synthesized are presented.
