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Nitration of benzothioxanthene: towards a new class of dyes with versatile photophysical properties†
José María
Andrés Castán, 
‡a
Chad
Risko,
*c
Cyrille
Monnereau,
b
Olivier
Maury,
*b
Philippe
Blanchard
a
and
Clément
Cabanetos
*a
‡a
Chad
Risko,
*c
Cyrille
Monnereau,
b
Olivier
Maury,
*b
Philippe
Blanchard
a
and
Clément
Cabanetos
*a
Abstract
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.
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