
%0 Journal Article
%A Badger, GM 
%A Joshua, CP 
%A Lewis, GE 
%T Photochemical reactions of azo compounds. V. Photochemical cyclodehydrogenations of Amino-, Acetyl-, and Nitro-azobenzenes
%J Australian Journal of Chemistry
%D 1965/10/01
%V 18
%N 10
%P 1639-1647
%K 
%R https://doi.org/10.1071/CH9651639
%U https://www.publish.csiro.au/paper/CH9651639 
%X 4-Benzdaminoazobenzene and 4,4'-bisbenzalaminoazobenzene have been shown to undergo photochemical cyclodehydrogenation in concentrated (98%) sulphuric acid to give 2-aminobenzo[c]cinnoline and 2,9-diaminobenzo[c]cinnoline respectively in excellent yields; but 4-aminoazobenzene and 4,4'-diaminoazobenzene were not cyclized. 3-Arninoazobenzene and 3-benzalaminoazobenzene both gave 3-aminobenzo[c]cinnoline. 3-Nitro- and 3-acetyl-azobenzenes gave 3-nitro- and 3-acetyl-benzo[c]cinnolines; and 4-nitro- and 4-acetyl-azobenzenes gave 2-nitro- and 2-acetyl-benzo[c]cinnolines. 
