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Metal-Free Indole-Phenacyl Bromide Cyclization: A Regioselective Synthesis of 3,5-Diarylcarbazoles

Sudipto Debnath1, Tuluma Das1, Tanmay K Pati1

  • 1Department of Chemistry, University of Calcutta, 92, A. P. C. Road, Kolkata 700009, India.

The Journal of Organic Chemistry
|October 2, 2020
PubMed

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The reaction of weakly electrophilic aryldiazonium (also called arenediazonium) salts with highly activated aromatic compounds leads to the formation of products with an —N=N— link, called an azo linkage. This reaction, presented in Figure 1, is known as diazo coupling and occurs without the loss of the nitrogen atoms of the aryldiazonium salt. Highly activated aromatic compounds such as phenols or arylamines favor the diazo coupling reaction. The coupling generally occurs at the para...
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