Synthesis of Polyheterocyclic Ring Systems Included Triazolo[1,5-a]Pyrimidine as Antioxidant Agents

The highly versatile 6-cyano-5-oxo-3,5-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine (6) has been synthesized and utilized as a building block for the design of new tricyclic and tetracyclic ring system...