Diazotization of 6-amino-2-phenyl-7-chloro-2H-benzotriazole-4-carboxylic acid and transformations of the resulting diazo compounds

6-Amino-2-phenyl-7-chloro-2H-benzotriazole-4-carboxylic acid was prepared by oxidation of 2,5-diamino-4-chloro-2-phenylazobenzoic acid, and its diazotization and subsequent transformations of the diazo compounds were studied. 7-Hydroxy-2-phenyl-2H-benzotriazole-4-carboxylic acid was prepared.Translated from Zhurnal Obshchei Khimii, Vol. 74, No. 11, 2004, pp. 1894–1897.Original Russian Text Copyright © 2004 by Artamonov, Perevalov.This revised version was published online in April 2005 with a corrected cover date.