
%0 Journal Article
%A Chen, QP 
%A Deady, LW 
%T Synthesis of Some Benzo[b][1,6]naphthyridines and Benzo[b][1,7]naphthyridines
%J Australian Journal of Chemistry
%D 1993/07/01
%V 46
%N 7
%P 987-993
%K 
%R https://doi.org/10.1071/CH9930987
%U https://www.publish.csiro.au/paper/CH9930987 
%X Pfitzinger (1-benzylpiperidin-4-one with 7-methylisatin) and Friedlander (3-aminopyridine-4-carbaldehyde with 2-methylcyclohexanone) syntheses, respectively, were used to prepare the title 'azaacridines' containing a methyl substituent peri to the central nitrogen. Oxidation of this group gave the corresponding aldehyde and carboxylic acid. In the [1,6] case, especially, the 10-position was also easily oxidized to give acridone analogues. Nitration occurred exclusively in the benzenoid rings. 
