“…In the work of Kholodnyak et al, 62 2-(5-aryl-1H-1,2,4-triazol-3-yl)anilines 62 were used as 1,5-binucleophiles in the synthesis of triazolo [1,5-c]quinazolines. The interaction of anilines 62 with aromatic and aliphatic aldehydes in acetic acid for 3-6 h led to formation of the product mixture of 2-aryl-5,6-dihydro [1,2,4]triazolo [1,5-с] Further investigation by the same group 64 allowed to obtain spiro derivatives 154 as products of binucleophilic addition of compounds 62 to cycloalkanones (cyclopentanone, cyclohexanone) (Scheme 53).…”