
%0 Journal Article
%A Jamieson, NC 
%A Lewis, GE 
%T Photochemical reactions of azo compounds. IX. Further studies related to the photochemical reactions of bisazo compounds
%J Australian Journal of Chemistry
%D 1967/02/01
%V 20
%N 2
%P 321-338
%K 
%R https://doi.org/10.1071/CH9670321
%U https://www.publish.csiro.au/paper/CH9670321 
%X The photochemical reactions of 4,4?-bis(phenylazo)biphenyl and 4- phenyl-azoazobenzene in 98% sulphuric acid have been examined, for comparison with the corresponding reactions in 22N acid. Photochemical cyclodehydrogenation of 4-phenylazoazobenzene to two benzo[c]cinnoline derivatives has thereby been effected for the first time. The observed course of the latter reaction has led, in turn, to studies of the benzidine rearrangement of 2-(2-phenylhydrazino)benzo[c]- cinnoline, of the photochemical cyclodehydrogenation of 3-phenylazobenzene, and of the photochemical reaction of 2-phenylazobenzo[c]cinnoline. The results of these investigations are now recorded and discussed. 
