共查询到20条相似文献,搜索用时 15 毫秒
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Zh. N. Fidler E. F. Shibanova P. V. Makerov I. D. Kalikhman A. M. Shulunova G. I. Sarapulova L. V. Klyba V. Yu. Vitkovskii N. N. Chipanina V. A. Lopyrev M. G. Voronkov 《Chemistry of Heterocyclic Compounds》1980,16(10):1079-1083
Only 3-acylamino-1,2,4-triazoles were isolated in the acylation of 3-amino-1,2,4-triazole with acid chlorides that contain strong electron acceptor substituents. Acylation takes place in the 2 position when aliphatic and aromatic acid chlorides are used as the acylating agents. The action of methoxy- and ethoxyformyl chlorides leads to the formation of 1- and 2-alkoxycarbonyl-3-amino-1,2,4-triazoles. When N-acyl-3-amino-1,2,4-triazoles are heated, they undergo intermolecular trans-aminoacylation to 3-acylamino-1,2,4-triazoles, which exist in the solid phase in the form of amido and imido tautomers. Under the conditions of massspectroscopic analysis the percentage of the imido form increases as the electronacceptor capacity of the substituent increases.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 10, pp. 1414–1419, October, 1980. 相似文献
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Loreto Salazar Modesta Espada Carmen Avendao Jos Elguero 《Journal of heterocyclic chemistry》1990,27(4):1109-1110
N-Amination of the 3(5)-amino-1,2,4-triazolide anion with hydroxylamine-O-sulfonic acid is studied. This method provided an access to the previously unknown 1,5-diamino-1,2,4-triazole. 相似文献
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Synthesis of 3-Azido-5-amino-1,2,4-triazole 总被引:2,自引:0,他引:2
3-Azido-5-amino-1,2,4-triazole was obtained from 3,5-diamino-1,2,4-triazole in two ways: by partial diazotization-substitution directly in the substrate or at its primarily nitrosation, and also with the use of direct or indirect protection of an amino group with subsequent conversion into azido compound followed by deprotection. 相似文献
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Ovchinnikova I. G. Valova M. S. Matochkina E. G. Kodess M. I. Tumashov A. A. Slepukhin P. A. Fedorova O. V. Rusinov G. L. Charushin V. N. 《Russian Chemical Bulletin》2011,60(5):965-974
A new type of intramolecular cyclization of 1,5-bis[2-(E-3-oxo-3-phenylprop-1-enyl)-phenoxy]-3-oxapentane with 3-aminotriazole promoted by potassium ions was discovered. A cascade
mechanism for the formation of crownophane with 4,7-dihydro[1,2,4]triazolo[1,5-a]-pyrimidine fragment was suggested. Effects of oligooxyethylene fragment of the chalcone podand and acid-base catalysis on
the selectivity of the cyclocondensation processes and degree of oxidation of triazolopyrimidine fragments were studied. The
product structures were confirmed by IR, 1H and 13C NMR spectroscopy and X-ray diffraction study. 相似文献
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P. J. Sánchez-Soto E. Morillo J. L. Pérez-Rodríguez C. Real 《Journal of Thermal Analysis and Calorimetry》1995,45(5):1189-1197
Thermoanalytical study of the pesticide 3-amino-1,2,4-triazole (ATA) has been carried out, using simultaneous DTA-TG in nitrogen flow, in order to know its thermal behaviour and stability. These techniques have been further complemented using evolved gas analysis and mass spectroscopy (EGA-MS). Two different stages of ATA decomposition were observed: after the first decomposition step, a mixture of compounds is obtained, according to MS data, being the principal component a compound of molecular weight 126. It is formed by a first order reaction mechanism, according to the kinetic study, withE a=124±8 kJ·mol?1. The second decomposition step takes place about 735°C, with evolution of HCN and NH3, being the final weight loss 96%. 相似文献
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V. V. Lipson V. D. Orlov S. M. Desenko T. M. Karnozhitskaya M. G. Shirobokova 《Chemistry of Heterocyclic Compounds》1999,35(5):595-599
The condensation of arylidene derivatives of Meldrum's acid with 3-amino-1,2,4-triazole in nitrobenzene leads to 4,5,6,7-tetrahydro-1,2,4-triazolo
[1,5-a]pyrimidin-5-ones. In DMF the reaction proceeds with the formation of arylsubstituted N-(2H-1,2,4-triazol-3-yl)-3-(2H-1,2,4-triazol-3-ylamino)propionamides.
Ukrainian Research Institute for the Pharmacotherapy of Endocrine Diseases, Kharkov 310002. Kharkov State University, Kharkov
310077, Ukraine 相似文献
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V. D. Orlov S. M. Desenko K. A. Potekhin Yu. T. Struchkov 《Chemistry of Heterocyclic Compounds》1988,24(2):192-196
Dihydro-1,2,4-triazolo[1,5-a]pyrimidine derivatives were obtained by condensation of 3-amino-1,2,4-triazole with 1,3-diaryl-1-propen-3-ones. The structure of 5-phenyl-7-(4-methylphenyl)-4,7-dihydro-1,2,4-triazolo[1,5-a]pyrimidine was established by x-ray diffraction analysis.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 2, pp. 229–233, February, 1988. 相似文献
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G. G. Skvortsova E. S. Domnina L. P. Makhno V. K. Voronov D. D. Taryas Hinova N. N. Chipanina 《Chemistry of Heterocyclic Compounds》1973,9(11):1419-1422
The reaction of acetylene with 3-amino-1,2,4-triazole forms two isomeric 3-amino-N-vinyl-1,2,4-triazoles. Their structures have been studied by PMR and IR spectroscopy and dipole moments. The high activity of the new vinyl compounds of the azole series in the addition of electrophilic reagents, in polymerization, and in complex formation has been shown.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 11, pp. 1566–1569, November, 1973. 相似文献
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M. G. Voronkov L. G. Shagun I. A. Dorofeev L. V. Zhilitskaya N. O. Yarosh L. I. Larina 《Russian Chemical Bulletin》2013,62(11):2554-2556
3-Amino-1,4-bis(2-oxopropyl)-4H-1,2,4-triazolium triiodide is the product of the reaction of 3-amino-1,2,4-triazole with 1,3-diiodopropan-2-one in acetone in the absence of bases and phase-transfer catalysts. In dimethyl sulfoxide, conversely, a water soluble polyionene consisting of three aminotriazole rings bound by 1,3-dimethylenecarbonyl bridges is formed. The effect of the solvent on the alkylation of 3-amino-1,2,4-triazole with 1,3-diiodopropan-2-one was studied. 相似文献
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N. N. Kolos V. D. Orlov E. K. Slobodina E. Yu. Yur'eva S. P. Korshunov Zyong van Tué 《Chemistry of Heterocyclic Compounds》1992,28(2):222-227
1,2,4-Triazolo[3,4-b]-1,3,4-thiadiazines, hydrazones, and -thio adducts were obtained by reactions of 4-amino-3-mercapto-1,2,4-triazole with -bromoacetophenones, aldehydes, and ,-unsaturated ketones. Conditions that promote the cyclocondensation of the -thio adducts to the previously undescribed 1,2,4-triazolo[3,4-b]-1,3,4-thiadiazepines were found. The chemical and spectral properties of the compounds obtained are discussed.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 2, pp. 267–272, February, 1992. 相似文献
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 1, pp. 137–138, January, 1994. 相似文献
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M. G. Voronkov V. A. Lopyrev N. N. Chipanina V. V. Makarskii L. V. Sherstyannikova O. A. Zasyadko E. F. Shibanova T. N. Vereshchagina Yu. L. Frolov 《Chemistry of Heterocyclic Compounds》1977,13(4):441-443
The manifestation of acid-base interactions in the electronic absorption spectra of 32 1,2,4-triazole derivatives was studied. Ionization of the heteroring does not have a substantial effect on the energies of the electron transitions of 3-chloro-5-substituted 1,2,4-triazoles but causes changes in the extinctions of the absorption bands of 3-amino-5-substituted triazoles.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 4, pp. 546–548, April, 1977. 相似文献
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Novel, useful, and unstable cyanamides including the title compounds have been made cleanly from readily available 1-substituted-1,2,4-triazoles by titration with n-BuLi. 相似文献