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Communication | Special issue | Vol 37, No. 2, 1994, pp.697-700
Published online, 1st January, 1970
DOI: 10.3987/COM-93-S89
■ Electrocyclic Ring Closure of 1-Azatrienes as a Route to the Indolo[3,2,1-ij][1,6]naphthyridine Ring System

Andrew L. Germain, Thomas L. Gilchrist,* and Paul D. Kemmitt

*Department of Chemistry, University of Liverpool, Liverpool, L69 3BX, U.K.

Abstract

t- Methods of annelation of indole across the 1- and 2-positions have been explored using both the intramolecular Heck reaction and Dieckmann cyclisation. Two examples 5 and 7 of the title ring system have been produced by the thermal cyclisation of indole-3-carboxaldehyde oximes with an akenyl substituent at C-2.