
%0 Journal Article
%A Rosevear, J 
%A Wilshire, JFK 
%T The reduction of some o-nitrophenylazo dyes with glucose: a general synthesis of 2-Aryl-2H-benzotriazole 1-oxides
%J Australian Journal of Chemistry
%D 1982/10/01
%V 35
%N 10
%P 2089-2093
%K 
%R https://doi.org/10.1071/CH9822089
%U https://www.publish.csiro.au/paper/CH9822089 
%X The reduction of some representative o-nitrophenylazo dyes in ethanolic alkali with glucose gives the corresponding 2-aryl-2H-benzotriazole 1-oxides in excellent yield. These 1-oxides are rapidly reduced to the parent benzotriazoles at room temperature by means of zinc dust/ethanolic alkali. This method provides a convenient preparation for 5-chlorobenzotriazoles, which are otherwise readily dechlorinated by zinc dust under more vigorous conditions. 
