
%0 Journal Article
%A Amiet, RG 
%A Evans, NA 
%A Wynne, PM 
%T Photooxidation of 2-Phenylbenzotriazoles
%J Australian Journal of Chemistry
%D 1989/03/01
%V 42
%N 3
%P 441-445
%K 
%R https://doi.org/10.1071/CH9890441
%U https://www.publish.csiro.au/paper/CH9890441 
%X Irradiation, with ultraviolet light, of 2-phenylbenzotriazole in aerated solvents resulted in oxidation of the benzo ring to yield the diacid 2-phenyl-1,2,3-triazole-4,5-dicarboxylic acid. A possible intermediate, 2-phenylbenzotriazole-4,7-dione, also yielded the diacid on photooxidation . The methyl ether of the commercial photostabilizer  Tinuvin P undergoes an analogous reaction to produce the corresponding diacid. 
