Synthesis of New Substituted 4-Amino-3,5-dinitropyridine Derivatives

Facile synthetic routes for the preparation of some new 4‐amino‐3,5‐dinitropyridine derivatives have been revealed. Nitration of 2‐chloropyridin‐4‐amine ( 1 ) as a starting material, in an unexpected one‐step reaction, to give dinitrated derivatives, followed by nucleophilic substitution reactions with sodium azide, potassium fluoride, ammonia, methylamine, and 4‐nitroimidazol, respectively, gave substituted 4‐amino‐3,5‐dinitropyridine derivatives. Meanwhile, its azide derivative underwent a ring closure conversion into 7‐amino‐6‐nitro‐1,2,5]oxadiazolo3,4‐b]pyridine‐1‐oxide. It is of significance that all of the nucleophilic substitution reactions were carried out under mild conditions.