Direct formation of 4,5-disubstituted carbazoles via regioselective dilithiation†
Ian A.
Pocock, 
a
Alya M.
Alotaibi,
ab
Kesar
Jagdev,
a
Connor
Prior,
a
Louise
Male
a
and
Richard S.
Grainger
*a
a
Alya M.
Alotaibi,
ab
Kesar
Jagdev,
a
Connor
Prior,
a
Louise
Male
a
and
Richard S.
Grainger
*a
Abstract
Carbazoles are widely exploited for their interesting photophysical and electronic properties, however bay (4,5-) functionalization is challenging, and previously inaccessible through carbazole C–H activation. We report a simple methodology which introduces a range of versatile 4,5-functionality, enabling the wider investigation of ring annulation and close proximity effects on carbazole properties.
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