Fused pyrazolo[3,4-d] pyrimidine nitrogen-rich salts with balanced energetic performance.

In this study, a series of novel energetic salts were synthesized and characterized using a pyrazolo[3,4-d]pyrimidine-derived fused tetracyclic backbone. All of them exhibit good densities, good detonation parameters, and low sensitivity toward mechanical stimuli. Detonation testing revealed that the detonation performance of compound 4c produces a dent of 36 × 31 mm on a lead plate, qualifying it as a potential secondary explosive.