The specific reactivity of 3,4,5-trinitro-1H-pyrazole

Nitration of 3,5-dinitropyrazole with HNO3–H2SO4 mixture gives 3,4,5-trinitro-1H-pyrazole, which in reaction with ammonia, amines or thiols under mild conditions undergoes regioselective nucleophilic substitution of the 4-positioned nitro group.