
%0 Journal Article
%A Chang, K 
%A Grimmett, MR 
%A Ward, DD 
%A Weavers, RT 
%T The Nitration of Brominated Pyrazoles in Aqueous Sulfuric Acid
%J Australian Journal of Chemistry
%D 1979/08/01
%V 32
%N 8
%P 1727-1734
%K 
%R https://doi.org/10.1071/CH9791727
%U https://www.publish.csiro.au/paper/CH9791727 
%X Nitration in 80% sulfuric acid of 4-bromopyrazoles gives rise to considerable nitrodebromination. Compounds with no alkyl or aryl substituent on nitrogen give only the 4-nitro products (except 4-bromo-3-phenylpyrazole which gives the p-nitrophenyl compound). N-Alkyl-4-bromopyrazoles give products of nitrodebromination as well as those arising from nitration in the 3- and/or 5-positions. N-Aryl-4-bromopyrazoles can also undergo nitration of the aryl substituent. 
