Reactions of N-aminopyrazoles with halogenating reagents (Cl 2, Br 2, I 2, BrCl, ICl, IBr, N- chlorosuccinimide, and N-bromosuccinimide) were examined. Some of these reagents preferentially lead to oxidation of the amino group to give the corresponding 1, 2, 3-triazines as major products, while others mainly gave either or both of 1-amino-4-halopyrazoles and 5- halo-1, 2, 3-triazines as the result of halogenation of the 4-position of the pyrazole ring ...
