Abstract

As synthetic precursors of hexaaza-kekulene 1 the dibenzo[ b,j ]= [1,10] phenanthroline systems 2, 3, 4, 5 and 6 were prepared. From 6 via 7 a product was obtained for which the dodecahydrohexaaza-kekulene structure 8 is suggested on the basis of 1H-NMR comparison with the dipyrido[3,2- c ;=2′,3′- h ]acridine (14) for which two syntheses are reported.

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