21732-17-2Relevant articles and documents
Bifunctional Fe(ii) spin crossover-complexes based on ω-(1: H -tetrazol-1-yl) carboxylic acids
Zeni, Willi,Seifried, Marco,Knoll, Christian,Welch, Jan M.,Giester, Gerald,St?ger, Berthold,Artner, Werner,Reissner, Michael,Müller, Danny,Weinberger, Peter
, p. 17183 - 17193 (2020)
To increase the supramolecular cooperativity in Fe(ii) spin crossover materials based on N1-substituted tetrazoles, a series of ω-(1H-tetrazol-1-yl) carboxylic acids with chain-lengths of C2-C4 were synthesized. Structural characterization confirmed the formation of a strong hydrogen-bond network, responsible for enhanced cooperativity in the materials and thus largely complete spin-state transitions for the ligands with chain lenghts of C2 and C4. To complement the structural and magnetic investigation, electronic spectroscopy was used to investigate the spin-state transition. An initial attempt to utilize the bifunctional coordination ability of the ω-(1H-tetrazol-1-yl) carboxylic acids for preparation of mixed-metallic 3d-4f coordination polymers resulted in a novel one-dimensional gadolinium-oxo chain system with the ω-(1H-tetrazol-1-yl) carboxylic acid acting as μ2-η2:η1 chelating-bridging ligand.
Energetic salts based on nitroiminotetrazole-containing acetic acid
Joo, Young-Hyuk,Gao, Haixiang,Parrish, Damon A.,Cho, Soo Gyeong,Goh, Eun Mee,Shreeve, Jean'Ne M.
, p. 6123 - 6130 (2012)
2-(5-Nitroiminotetrazol-1-yl)acetic acid (4) was synthesized from 100% nitric acid and ethyl 2-(5-aminotetrazol-1-yl)acetate (2), which was easily obtained by reaction of ethyl aminoacetate hydrochloride, sodium hydroxide, and cyanogen azide. Compound 4 was also formed with 100% nitric acid and 2-(5-aminotetrazol-1-yl)acetic acid which was prepared from sodium 5-aminotetrazolate and 2-chloroacetic acid. New energetic materials comprised of nitroiminotetrazolate salts with nitroiminotetrazolate and carboxylate anions have been characterized spectroscopically as well as with single crystal X-ray diffraction and elemental analyses. In addition, the heats of formation (ΔHf), and detonation pressures (P) and velocities (D) were calculated. All compounds were insensitive (>40 J) for impact with BAM Fallhammer. The Royal Society of Chemistry 2012.
Process for synthesizing 1H-tetrazoleacetic acid
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Paragraph 0008; 0029-0030, (2020/11/12)
The invention discloses a novel process for synthesizing 1H-tetrazoleacetic acid. According to the invention, glycine ester hydrochloride, triethyl orthoformate, sodium azide and the like are used asraw materials to synthesize 1H-tetrazoleacetic acid in an ethanol solution by a one-pot method; alkali is dropwise added into an ethanol solution of glycine ester hydrochloride, triethyl orthoformateand sodium azide, generated glycine ester reacts with triethyl orthoformate and sodium azide in a system, concentrated sulfuric acid and purified water are dropwise added into reaction liquid after the reaction is completed, and ring closing and hydrolysis are carried out to prepare 1H-tetrazoleacetic acid; the solvent ethanol used in the process can be repeatedly recycled, hydrolysis of triethylorthoformate can be inhibited, reaction progress is accelerated, cost is effectively reduced; and the synthesis process is simple in route, wide in application range, low in production cost, improvedin safety, free of pollution, capable of completely meeting the production requirements of modern green chemical engineering, high in yield, good in operability and repeatability and convenient for industrial production.
Preparation method of 1-tetrazole acetate
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Paragraph 0027; 0029; 0030; 0032, (2020/07/21)
The invention relates to the field of organic synthesis, and discloses a preparation method of 1-tetrazole acetate, which comprises the following steps: 1) taking aminoguanidine carbonate as a raw material, regulating to acidity with an acid solution, cooling, dropwisely adding a sodium nitrite water solution, regulating the pH value to alkalinity, and carrying out reflux cyclization to generate 5-aminotetrazole; 2) reacting 5-aminotetrazole with chloroacetic acid under an alkaline condition to synthesize 1-acetic acid-5-aminotetrazole, and 3) finally reducing with a reducing agent to remove amino to obtain 1-tetrazole acetate. Compared with the prior art, the method provided by the invention is safer and more environment-friendly, and the obtained product has high yield and purity.