4H-Imidazo[4,5-e][2,1,3]benzothiadiazol-5(6H)-one (3) has been prepare
d bq the condensation of 4,5-diamino-2, 1,3-benzothiadizole (1) with u
rea. 4.5-Diamino-2.1.3-benzothiadizole (1) was also fused with thioure
a to get the 5-mercapto-4H-imidazo [4.5-e][2,1,3]benzothiadiazole (2).
Reactions on the compound (3) have been investigated.