- Nitrogen-Rich Tetrazolo[1,5-b]pyridazine: Promising Building Block for Advanced Energetic Materials
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Two metal-free explosives, tetrazolo[1,5-b]pyridazine-containing molecules [6-azido-8-nitrotetrazolo[1,5-b]pyridazine-7-amine (3at) and 8-nitrotetrazolo[1,5-b]pyridazine-6,7-diamine (6)], were obtained via straightforward two-step synthetic routes from commercially available reagents. Compound 3at displays an excellent detonation performance (Dv = 8746 m s-1 and P = 31.5 GPa) that is superior to commercial primary explosives such as lead azide and diazodinitrophenol (DDNP). Compound 6 has superior thermal stability, remarkable insensitivity, and good detonation performance, strongly suggesting it as an acceptable secondary explosive. The initiating ability of compound 3at has been tested by detonating 500 mg of RDX with a surprisingly low minimum primary charge of 40 mg. The extraordinary initiating power surpasses conventional primary explosives, such as commercial DDNP (70 mg) and reported 6-nitro-7-azido-pyrazol[3,4-d][1,2,3]triazine-2-oxide (ICM-103) (60 mg). The outstanding detonation power of 3at contributes to its future prospects as a promising green primary explosive. In addition, the environmentally benign methodology for the synthesis of 3at effectively shortens the time from laboratory-scale research to practical applications.
- Huang, Wei,Tang, Yongxing,Imler, Gregory H.,Parrish, Damon A.,Shreeve, Jean'ne M.
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- 5,6-Fused bicyclic tetrazolo-pyridazine energetic materials
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This study presents the synthesis of 5,6-fused bicyclic conjugated energetic compounds through a combined strategy of anchoring the catenated nitrogen-atom chain and introducing vicinal C-amino and C-nitro groups into a tetrazolo-pyridazine ring. Their crystal structures were confirmed by single crystal X-ray diffraction. Both compounds display good thermal stability, high energetic properties and low sensitivities as energetic materials.
- Chen, Sitong,Liu, Yuji,Feng, Yongan,Yang, Xianjin,Zhang, Qinghua
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- QUINOXALINONES AND DIHYDROQUINOXALINONES AS RESPIRATORY SYNCYTIAL VIRUS ANTIVIRAL AGENTS
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Quinoxalinones and dihydroquinoxalinones having inhibitory activity on RSV replication and having the formula (I) including addition salts, and stereochemically isomeric forms thereof; compositions containing these compounds as active ingredient and processes for preparing these compounds and compositions.
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(2014/08/07)
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