Isomerism of nitratoalkylazoles DOI Creative Commons

Lukas Bauer,

Maximilian Benz,

Thomas M. Klapötke

и другие.

FirePhysChem, Год журнала: 2023, Номер 4(3), С. 201 - 210

Опубликована: Ноя. 23, 2023

In the field of energetic materials, traditional materials with high toxicity or other disadvantages are mostly used. There is an urgent need for trinitrotoluene replacements (TNT), which itself toxic and its production problematic due to red wastewater. New should be safe handle, have good performance, inexpensive synthesize. Nitratoalkylazoles known low melting points properties compared TNT. this paper, seven compounds synthesized starting from 5-methyltetrazole, 5-hydroxymethyltetrazole 4,5-bishydroxymethyltriazole. The nitrates characterized in terms their physical, chemical, properties. Of those compounds, five solid, between 27 110°C, two liquid. Methylation hydroxyalkylation were performed discussed extensively. organic nitrate introduced last step so that synthesis remains scalable. Correlations molecular geometry explained. Calculations indicate detonation velocities 6-11% higher than A discussion effect isomerism on leads surprising insights help focus accelerate research replacement

Язык: Английский

A review of recent synthetic strategies and biological activities of isoxazole DOI
Chandrashekhar P. Pandhurnekar,

Himani C. Pandhurnekar,

Arvind J. Mungole

и другие.

Journal of Heterocyclic Chemistry, Год журнала: 2022, Номер 60(4), С. 537 - 565

Опубликована: Окт. 13, 2022

Abstract Among different heterocyclic compounds, isoxazole and their analogues are very important classes of compounds as they display an extensive range biological actions. This makes such scaffolds structures in the field medicinal chemistry. From literature assessment, is clinically proven to be effective anti‐bacterial, anti‐fungal, anti‐inflammatory, anti‐cancer, anti‐tubercular, anti‐neoplastic agent. The derivatives which exhibits adjustment structure have shown a high degree variety properties evident them beneficial progress novel bioactive drugs show enhanced effectiveness along with minor harmfulness. Structural aspects having aromaticity weaker nitrogen‐oxygen bonding provide potential site for ring cleavage. Thus, this system allows easier modifications substituents consequently make useful intermediates various synthetic routes compounds. Hence, synthesis evaluation isoxazole‐containing molecules wider therapeutic consequences always topic interest chemists. light comprehensive research on isoxazole, it thought worthwhile review pathways broad spectrum

Язык: Английский

Процитировано

60

Interpol review of the analysis and detection of explosives and explosives residues DOI Creative Commons

Douglas J. Klapec,

Greg Czarnopys,

Julie Pannuto

и другие.

Forensic Science International Synergy, Год журнала: 2023, Номер 6, С. 100298 - 100298

Опубликована: Янв. 1, 2023

Язык: Английский

Процитировано

21

Energetic 1,2,4-oxadiazoles: synthesis and properties DOI
Alexander V. Shaferov, Леонид Л. Ферштат

Russian Chemical Reviews, Год журнала: 2024, Номер 93(2), С. RCR5109 - RCR5109

Опубликована: Янв. 16, 2024

The study of high-energy materials based on poly nitrogen- and nitrogen-oxygen-containing heterocycles is one the most important relevant modern interdisciplinary research areas at intersection organic physical chemistry science. Among such heterocycles, 1,2,4-oxadiazole ring a rather interesting building block for synthesis new energetic compounds. Although 1,2,4-oxadiazoles has been developed more than 100 years, these have only recently become known are currently "hot spots" in this field This review systematizes published methods features reactivity 1,2,4-oxadiazole-based Mono- bis(1,2,4-oxadiazoles) as well structures containing other azoles pyrazole, 1,2,5-oxadiazole, 1,3,4-oxadiazole, 1,2,3-triazole, 1,2,4-triazole tetrazole considered. For series structurally similar compounds, their physicochemical properties summarized factors affecting particular parameter discussed.<br> Bibliography — 123 references.

Язык: Английский

Процитировано

8

Nitrene formation is the first step of the thermal and photochemical decomposition reactions of organic azides DOI Creative Commons
Juan Soto, Manuel Algarra, Daniel Peláez

и другие.

Physical Chemistry Chemical Physics, Год журнала: 2022, Номер 24(8), С. 5109 - 5115

Опубликована: Янв. 1, 2022

The first reaction step of the thermal or photochemical decomposition reactions aliphatic azides yields a nitrene intermediate.

Язык: Английский

Процитировано

24

Design and synthesis of phenylene-bridged isoxazole and tetrazole-1-ol based energetic materials of low sensitivity DOI Creative Commons
Sohan Lal, Richard J. Staples, Jean’ne M. Shreeve

и другие.

Dalton Transactions, Год журнала: 2023, Номер 52(11), С. 3449 - 3457

Опубликована: Янв. 1, 2023

A facile synthesis of phenylene-bridged insensitive energetic materials was developed. Most title compounds are suitable propellants for rocket propulsion and ethanol-based fuel blends. Three potential melt-castable materials.

Язык: Английский

Процитировано

10

Design and synthesis of a new type of green primary explosive with insensitive properties of polyazido and nitrogen-rich fused-ring tetrazole DOI
Hao Xue,

Guofeng Zhang,

Huaqi Zhang

и другие.

Journal of Molecular Structure, Год журнала: 2025, Номер 1333, С. 141718 - 141718

Опубликована: Фев. 13, 2025

Язык: Английский

Процитировано

0

Hydrogen-Free Explosive of N-Azo-Bridged 1,2,4-Triazole: A Novel Nitrogen-Chain-Extended Compound with Exceptional Energy Performance DOI

Meiqi Xu,

Wen‐Shuai Dong,

Qamar‐un‐Nisa Tariq

и другие.

ACS Applied Materials & Interfaces, Год журнала: 2025, Номер unknown

Опубликована: Апрель 22, 2025

The design of high-energy-density materials (HEDMs) and the investigation energy limits have consistently represented a focal point significant challenge in research. This study prepared hydrogen-free compound, BLG-102, with high nitrogen content (66.6%) using an energetic block based on long chain (N6). BLG-102 has crystal density 1.85 g·cm-3, measured 1.82 g·cm-3. It also achieves zero oxygen balance (based CO), excellent enthalpy formation, good conjugate planarity aromaticity. demonstrates exceptional detonation performance velocity (VD = 9311 m·s-1) pressure (P 38.5 GPa). These values are superior to well-known compound RDX 8991 m·s-1, P 35.2 GPa), comparable HMX 9144 39.2 Nevertheless, exhibits slightly higher but acceptable sensitivity (IS 5 J, FS 54 N). remarkable capabilities laser initiation. Notably, 10 mg charge can effectively detonate 20 RDX, producing pore diameter 11.44 mm lead plate (2 thick). integrated approach concept─combining nitro, azide, structures 1,2,4-triazole framework─significantly enhances compounds. breaks through limit already known 1,2,4-triazole-based compounds provides new idea for synthesis HEDMs performance.

Язык: Английский

Процитировано

0

Sustainable Continuous Synthesis of 3,5-Disubstituted Isoxazoles: Development of an Integrated Reaction–Separation–Recovery System for Deep Eutectic Solvents DOI
Gwang‐Noh Ahn, Jung‐Ah Shin, Se‐Jin Lee

и другие.

ACS Sustainable Chemistry & Engineering, Год журнала: 2025, Номер unknown

Опубликована: Апрель 28, 2025

Язык: Английский

Процитировано

0

UV-photoelectron spectroscopy and MS-CASPT2/CASSCF study of the thermolysis of azidoethyl-methyl sulfide: Characterization and mechanism of the formation of S-methyl-N-sulfenylethanimine DOI
Manuel Algarra, Stéphane Labat, José E. Rodríguez‐Borges

и другие.

The Journal of Chemical Physics, Год журнала: 2025, Номер 162(19)

Опубликована: Май 16, 2025

The thermal decomposition of azidoethyl methyl sulfide was studied by real-time UV-photoelectron spectroscopy (UV-PES) at temperatures ranging from 773 to 1023 K. Different ionization energies were obtained using density functional theory calculations assign UV-PES spectra. complete active space self-consistent field and multistate second-order perturbation methods used predict the formation different species present in process. N2 S-methyl-N-sulfenylethanimine are generated first step reaction is dissociation molecule into nitrene nitrogen. spin state (singlet or triplet) formed temperature-dependent. At low (T ≤ 650 K), both states with almost same probability; contrast, high ≥ 1000 singlet majority intermediate. From this nitrene, three stable products detected experiments: an imine derivative, a four-member cyclic sulfenyl derivative.

Язык: Английский

Процитировано

0

N-Functionalisation of 5,5′-bistetrazole providing 2,2′-di(azidomethyl)bistetrazole: a melt-castable metal-free green primary explosive DOI

Thomas M. Klapötke,

Moritz Kofen,

Jörg Stierstorfer

и другие.

Dalton Transactions, Год журнала: 2021, Номер 50(39), С. 13656 - 13660

Опубликована: Янв. 1, 2021

Hydroxymethylation of 5,5′-bistetrazole paves the way for 2,2′ di(azidomethyl)-5,5′-bistetrazole – highlight this work. It's initiation capability and thermal behavior offers application as melt-castable metal-free green primary explosive.

Язык: Английский

Процитировано

16