AbstractA variety of hydrazino and dihydrazino‐5‐nitropyrimidines and their derivatives have been prepared by displacement reactions or reaction sequences from 2,4‐ or 4,6‐dichloro‐5‐nitropyrimidine. These include 2,4‐ and 4, 6‐dihydrazino, 2‐dimethylamino‐4‐hydrazino, 2‐hydrazino‐4‐dimethylamino, 2‐morpholino‐4‐hydrazino, and 2‐hydrazino‐4‐amino‐5‐nitropyrimidines. 2,4‐Dihydrazino‐5‐nitropyrimidine on condensation with selected aldehydes yielded a series of dihydrazones. Of these,p‐methoxybenzaldehyde (5‐nitropyrimidyl‐2, 4‐dihydrazone) showe