Fused 1,2,5-thiadiazoles have attracted much attention because of their interesting chemical properties and various possibilities in use as antibacterial and antiviral agents, agrochemicals, and as π-type building blocks for organic electronics, particularly for both low- and high-molecular weight organic light-emitting diodes (OLEDs). 1 Recently 1,2,5-thiadiazole derivatives were recognized as efficient electron acceptors and were successfully used ...