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Synthesis 1994; 1994(3): 270-272
DOI: 10.1055/s-1994-25456
short paper
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Synthesis of Benzocarbazoloquinones via Oxidative Cyclization

W. G. Rajeswaran* , P. C. Srinivasan
  • *Department of Organic Chemistry, University of Madras, Guindy Campus, Madras 600025, India
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Publikationsdatum:
27. September 2002 (online)

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Ethyl 1-benzenesulfonyl-2-bromomethyl-5-methoxyindole-3-carboxylate (2) and 2-methyl-3-phenylthioindole (5) have been converted into benzcarbazoloquinones 4 and 10, respectively, involving an oxidative cyclization by air during the application of polyphosphoric acid.