Synthesis of Carbazoles by a Diverted Bischler-Napieralski Cascade Reaction
Organic Letters(2021)
Abstract
An unforeseen twist in a seemingly trivial Bischler-Napieralski reaction led to the selective formation of an unexpected carbazole product. The reaction proved to be general, providing access to a range of diversely substituted carbazoles from readily available substrates. Judicious variation of substituents revealed a complex cascade mechanism comprising no less than 10 elementary steps, that could be diverted in multiple ways toward various other carbazole derivatives.
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Key words
bischler–napieralski cascade reaction,carbazoles,synthesis,diverted bischler–napieralski
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