Synthesis method of 2, 6-diamino-3, 5-dinitropyrazine-1-oxide

The invention discloses a synthesis method of 2, 6-diamino-3, 5-dinitropyrazine-1-oxide. A formula (1) of the 2, 6-diamino-3, 5-dinitropyrazine-1-oxide is shown as below. The synthesis method includes the steps of at 25 DEG C, adding 98% concentrated nitric acid and 20% fuming sulphuric acid according to a volume ratio of 1:(4-10) into a reaction vessel, then slowly adding a mixture of 2, 6-diaminopyrazine-1-oxide and heteropolyacid according to a mass ratio of (20-100):1, with a massic volume ratio of the 2, 6-diaminopyrazine-1-oxide to the 98% concentrated nitric acid being 1g:(1-3)ml; allowing stirring reaction for 1 to 2 hours, pouring the reaction mixture into ice water before filtering, rinsing the residue to allow it to be neutral, and rinsing it with organic solvent before drying so as to obtain the 2, 6-diamino-3, 5-dinitropyrazine-1-oxide. The synthesis method is used for preparation of the 2, 6-diamino-3, 5-dinitropyrazine-1-oxide.