Synthesis 2012; 44(9): 1339-1342
DOI: 10.1055/s-0031-1290812
paper
© Georg Thieme Verlag Stuttgart · New York

A Concise Synthesis of 6H-Indolo[2,3-b]quinolines: Formal Synthesis of Neocryptolepine

Authors

  • Hari K. Kadam

    Department of Chemistry, Goa University, Taleigao Plateau, Goa 403 206, India, eMail: stilve@unigoa.ac.in   Fax: +91(832)2452886
  • Prakash T. Parvatkar

    Department of Chemistry, Goa University, Taleigao Plateau, Goa 403 206, India, eMail: stilve@unigoa.ac.in   Fax: +91(832)2452886
  • Santosh G. Tilve*

    Department of Chemistry, Goa University, Taleigao Plateau, Goa 403 206, India, eMail: stilve@unigoa.ac.in   Fax: +91(832)2452886
Weitere Informationen

Publikationsverlauf

Received: 07. Februar 2012

Accepted after revision: 02. März 2012

Publikationsdatum:
05. April 2012 (online)


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Abstract

A new two-step approach for the synthesis of 6H-indolo[2,3-b]quinolines is described using indole C3 alkylation and a one-pot reduction–cyclization–aromatization sequence. The synthesis of the parent 6H-indolo[2,3-b]quinoline system constitutes a formal synthesis of the alkaloid neocryptolepine (cryptotackieine).