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Communication | Regular issue | Vol 31, No. 3, 1990, pp.401-405
Published online, 1st January, 1970
DOI: 10.3987/COM-89-5234
■ Synthesis of Key Carbazoles — Intermediates for Polymethoxyellipticines and Olivacins

Robin J. Hall, Anthony H. Jackson,* Ana M. F. Oliveira-Campos, Maria-Joao R. P. Queiroz, and Patrick V. R. Shannon*

*School of Chemistry and Applied Chemistry, College of Cardiff, University of Wales, Cardiff CF1 3TB, Wales, U.K.

Abstract

The synthesis of three polymethoxycarbazoles, key intermediates for the synthesis of new 6H-pyrido[4,3-b]carbzoles, is described. The required 3-formyl function, or its precursor, is introduced through three different strategies. The validity of these carbazoles for the synthesis of ellipticines and olivacines is demonstrated by the efficient synthesis of the new 7,8,9-trimetoxyellipticine.