Propriétés chimiques du benzisosélénazole-1,2

The nitration and the bromination of 1,2-benzisoselenazole give mono derivatives at 5- or 7-position. With potassium amide 3-amino-1,2-benzisoselenazole is obtained from the unsubstituted ring. We observe a ring opening by action of organolithium compounds. We describe also the synthesis of functional derivatives at the 3-position from 3-styryl-1,2-benzisoselenazole and selenonaphthenequinone.