Energetic azoles have shown great potential as powerful energetic molecules, which find various applications in both military and civilian fields. This work describes the synthesis, characterization and performance evaluation of two energetic triazole derivatives, viz. N‐(2,4‐dinitrophenyl)‐3‐nitro‐1H‐1,2,4‐triazole ( 1a ) and N‐(2,4‐dinitrophenyl)‐3‐azido‐1H‐1,2,4‐triazole ( 1b ). The compounds were synthesized from 3‐nitro‐1,2,4‐triazole and 3‐azido‐1,2,4‐triazole, by a simple synthetic route and structurally characterized using FT‐IR and NMR (1H, 13C) spectroscopy as well as elemental analysis. Thermal analyses on the molecules were performed using simultaneous TG‐DTA. Both compounds ( 1a , 1b ) showed good thermal stability with exothermic decomposition peaks at 348 °C and 217 °C, respectively, on DTA. The energetic and sensitivity properties of both compounds like friction sensitivities and heats of formation are reported. The heats of combustion at constant volume were determined using oxygen bomb calorimetry and the results were used to calculate the standard molar heats of formation (ΔfHm). The azido derivative ( 1b ) showed a higher positive heat of formation. The thermo‐chemical properties of the compounds as well as the thermal decomposition products were predicted using the REAL thermodynamic code. 相似文献
4,6‐Diazido‐N‐nitro‐1,3,5‐triazine‐2‐amine (DANT) was prepared with a 35 % yield from cyanuric chloride in a three step process. DANT was characterized by IR and NMR spectroscopy (1H, 13C, 15N), single‐crystal X‐ray diffraction, and DTA. The crystal density of DANT is 1.849 g cm−3. The cyclization of one azido group and one nitrogen atom of the triazine group giving tetrazole was observed for DANT in a dimethyl sulfoxide solution using NMR spectroscopy. An equilibrium exists between the original DANT molecule and its cyclic form at a ratio of 7 : 3. The sensitivity of DANT to impact is between that for PETN and RDX, sensitivity to friction is between that for lead azide and PETN, and sensitivity to electric discharge is about the same as for PETN. DANT′s heat of combustion is 2060 kJ mol−1. 相似文献
Reactions of hydrazonoyl halides 6 with either 4‐amino‐2,3‐dihydro‐6‐substituted‐3‐thioxo‐[1,2,4]‐triazin‐5(4H)ones 1 ( 2 ) or 4‐amino‐3‐methylthio‐6‐substituted‐[1,2,4]‐triazin‐5(4H)ones 3 ( 4 ) gave [1,2,4]‐triazino‐[4,3‐b][1,2,4,5]tetrazine derivatives 9 ( 10 ), respectively. The mechanism of the reactions studied is discussed. 相似文献
The azido‐tetrazolo tautomerizations of 3,6‐diazido‐1,2,4,5‐tetrazine (DIAT) in different solvents were investigated with HPLC and 13C NMR spectroscopy. 6‐Amino‐tetrazolo[1,5‐b]‐1,2,4,5‐tetrazine (ATTZ) was irreversibly formed as the final product by azido‐cyclization following N2 elimination from one of the azido substituents at room temperature in DMSO. The structure of ATTZ was characterized by X‐ray crystallography; differential scanning calorimetry (DSC), mass spectrometry, as well as IR and 1H NMR and 13C NMR spectroscopy. The crystal density was found to be 1.272 g cm−3. DSC result suggested that ATTZ with the melting point of 84 °C strongly decomposes with explosion at 198 °C, which can be regarded as a primary explosive. 相似文献
Polo‐like kinase 1 (Plk1) is an evolutionarily conserved serine/threonine kinase, and its N‐terminal kinase domain (KD) controls cell signaling through phosphorylation. Inhibitors of Plk1 are potential anticancer drugs. Most known Plk1 KD inhibitors are ATP‐competitive compounds, which may suffer from low selectivity. In this study we discovered novel non‐ATP‐competitive Plk1 KD inhibitors by virtual screening and experimental studies. Potential binding sites in Plk1 KD were identified by using the protein binding site detection program Cavity. The identified site was subjected to molecular‐docking‐based virtual screening. The activities of top‐ranking compounds were evaluated by in vitro enzyme assay with full‐length Plk1 and direct binding assay with Plk1 KD. Several compounds showed inhibitory activity, and the most potent was found to be 3‐((2‐oxo‐2‐(thiophen‐2‐yl)ethyl)thio)‐6‐(pyridin‐3‐ylmethyl)‐1,2,4‐triazin‐5(4H)‐one (compound 4 ) with an IC50 value of 13.1±1.7 μm . Our work provides new insight into the design of kinase inhibitors that target non‐ATP binding sites. 相似文献
The explosive properties of inclusion compounds containing the monoanion of the energetic compound 3‐nitro‐1,2,4‐triazol‐5‐one (NTO−) non‐covalently bound to either of two larger, energetic, receptor complexes, namely 1‐(2,4‐dinitrophenyl)‐1,4,7,10‐tetraazacyclododecanezinc(II) or 1‐(2,4‐dinitrophenyl)‐1,4,7,10‐tetraazacyclododecanecopper(II), both as their monoperchlorate salts, are reported. The sensitivity of the receptor host–guest complexes to electrostatic discharge or friction was not found to differ from that displayed by the separate components. However, for thermal sensitivity it was found that whereas NTO− desensitized the Zn(II) receptor complex it sensitized the Cu(II) receptor complex. For sensitivity to impact, measured using the Rotter impact test, it was found that NTO− sensitized the Zn(II) receptor complex, but desensitized the Cu(II) receptor complex. 相似文献
The copper(I)‐catalyzed (2+3) cycloaddition between azido (or azidomethylene) ferrocenes and enantiopure (P)‐14‐(p‐ethynylphenyl)‐[5]‐tetrahydro‐helicenequinone afforded ferrocene–triazole–quinone triads, whereas diazido ferrocenes gave rise to the corresponding double triads. In reactions with 1,1′‐diazidoferrocene, the use of CuI/CH3CN or CuSO4/sodium ascorbate/THF conditions allowed the divergent formation of an open chain dimeric structure or a 1,4‐diaza‐[4]‐ferrocenophane resulting from an intramolecular oxidative coupling of the two triazole units formed after the double cycloaddition process.
Two new energetic azido esters named 1,3‐bis(azidoacetoxy)‐2‐azidoacetoxymethyl‐2‐ethylpropane ( I ) and 1,3‐bis(azidoacetoxy)‐2,2‐bis(azidomethyl)propane ( II ), have been synthesized and characterized by IR, NMR and Elemental Analysis. Thermal studies revealed that azido esters I and II are stable up to 180 °C and their glass transition temperatures are −47 °C and −52 °C, respectively. 相似文献