Nitration of benzothioxanthene: towards a new class of dyes with versatile photophysical properties

The selective mono-nitration of benzothioxanthane ( BTXI ) is demonstrated herein. This leap opens doors to a wide range of chemical reactions since the nitro compound was successfully reduced to a primary amine that was, in turn, converted into an azide. Beyond this chemical achievement, this new series of functionalized BTXI was fully characterized, including from a photophysical point of view, expanding the scope of this promising rylene to build a new electroactive π-conjugated platform for electronic organic purposes. The selective mono-nitration of benzothioxanthene ( BTXI ) is demonstrated here, opening doors to a wide range of structures and reactions. In addition, a new series of derivaties was characterized expanding the scope for electronic organic purposes.