SCHEDULED MAINTENANCE
N-Alkylcarbazoles and several of their substitution derivatives are shown to undergo smooth dealkylation by heating with sulphur. This reaction provides a new route to many 3-substituted carbazoles, and can be applied to the synthesis of condensed polycyclic carbazoles such as the hitherto unknown 6H-dibenzo[b,h] carbazole, and 5H-benzo[b] carbazole.
N. P. Buu-Hoï and G. Saint-Ruf, J. Chem. Soc. C, 1966, 924 DOI: 10.1039/J39660000924
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