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Shabunina O. V. Starnovskaya E. S. Shtaits Ya. K. Kopchuk D. S. Kovalev I. S. Zyryanov G. V. Rusinov V. L. Chupakhin O. N. 《Russian Journal of Organic Chemistry》2018,54(10):1576-1578
Russian Journal of Organic Chemistry - A practical procedure has been proposed for the synthesis of 6-aryl-3-(pyridin-2-yl)-1,2,4-triazines containing various functional groups in the... 相似文献
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Y. A. Ibrahim M. M. Eid M. A. Badawy S. A. L. Abdel-Hady 《Journal of heterocyclic chemistry》1981,18(5):953-956
The action of hydrazine on 3,5-dioxo-4-aryl-2,3,4,5-tetrahydro-1,2,4-triazines gave 4-amino-3,5-dixo-2,3,4,5-tetrahydro-1,2,4-triazines. The intermediates of this reaction were isolated and shown to be α-ketoacidhydra-zide 4-arylsemicarbazones and not the α-ketoanilidecarbohydrazones. The realtive rates of cyclization of the latter isomeric derivatives provide a support for a proposed intermediates which were not isolated in the reaction of 3-mercapto and 3-methylmercapto-4-aryl-5-oxo-4,5-dihydro-1,2,4-triazines with hydrazine. 相似文献
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D. Ashok Arram Ganesh B. Vijaya Lakshmi S. Ravi 《Russian Journal of General Chemistry》2014,84(6):1237-1242
Series of new (E)-1-aryl-3-[2-(piperidin-1-yl)quinolin-3-yl]prop-2-en-1-ones and (E)-1-aryl-3-[2-(pyrrolidin-1-yl)quinolin-3-yl]prop-2-en-1-ones have been efficiently prepared via the Claisen-Schmidt condensation of 2-(piperidin-1-yl)quinoline-3-carbaldehyde and 2-(pyrrolidin-1-yl)quinoline-3-carbaldehyde, respectively, with aryl methyl ketones under conditions of ultrasound and microwave irradiation. Structures of the products have been confirmed by IR, 1H NMR, 13C NMR, and mass spectroscopy, as well as by elemental analysis. Evaluation of the in vitro antibacterial activity against bacterial (Gram-positive Staphylococcus aureus and Gram-negative Escherichia coli) and fungal (Aspergillus niger and Candida metapsilosis) strains has revealed good antimicrobial activity of some of the tested compounds. 相似文献
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N. N. Kolos V. D. Orlov B. V. Paponov O. V. Shishkin 《Chemistry of Heterocyclic Compounds》2001,37(3):338-345
The corresponding triazolopyrimidinium salts and 1,2,4-triazolo[1,5-a]pyrimidinium-6-olates were formed from the reaction of 3,4,5-triamino-1,2,4-triazole and 1-aryl-3-(4-nitrophenyl)-2,3-dibromopropanones. The structure of one of the latter has been established by X-ray crystallography. 相似文献
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用DCNPNPT测定江水中季铵盐型阳离子表面活性剂 总被引:4,自引:0,他引:4
利用三氮烯类试剂与季铵盐型阳离子表面活性剂形成离子缔合物可用于季铵盐型阳离子表面活性剂的测定。如用HDNPAPT[1]、HDAA[2]测定CTMAB、CPB,但其灵敏度有待提高。本文研究了显色剂1 (2,6 二氯 4 硝基苯) 3 (4 硝基苯) 三氮烯(DCNPNPT)[3]与阳离子表面活性剂的显色反应,结果表明,DCNPNPT与CTMAB、CPB反应的表观摩尔吸光系数分别为3 93×104L·mol 1·cm 1,和4 16×104L·mol 1·cm 1,是目前报道的用光度法测定季铵盐型阳离子表面活性剂较灵敏的体系之一。用此法测定了瓯江水中微量阳离子表面活性剂CTMAB、CPB的… 相似文献
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Krinochkin A. P. Guda M. R. Kopchuk D. S. Shtaitz Ya. K. Starnovskaya E. S. Savchuk M. I. Rybakova S. S. Zyryanov G. V. Chupakhin O. N. 《Russian Journal of Organic Chemistry》2021,57(4):675-677
Russian Journal of Organic Chemistry - Methyl 3-(3,6-diaryl-1,2,4-triazin-5-ylamino)thiophen-2-carboxylates were synthesized in 70–75% yield by solvent-free reaction of methyl... 相似文献
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The 13C NMR spectra of twelve 3-aryl-4-(5-aryl-Δ2-l,2,4-oxadiazolin-3-yl)sydnones and twelve 3-aryl-4-(5-aryl-l,2,4-oxadiazol-3-yl)sydnones have been measured and assigned by means of proton-noise decoupling and DEPT-experiments. The coupling constants were determined by means of gated decoupling, and NOE effects were observed by comparison of proton-decoupled and inverse-gated decoupled spectra. Differences shown by the oxadiazoline and the oxadiazole rings and the substitution effects are discussed. 相似文献
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V. N. Kozhevnikov D. N. Kozhevnikov V. L. Rusinov O. N. Chupakhin 《Chemistry of Heterocyclic Compounds》1999,35(4):470-473
Reaction of 6-aryl-3-dimethylamino-1,2,4-triazine 4-oxides with KCN results in constriction of the heterocycle and formation
of 3-amino-5-aryl-4-nitrosopyrazoles. Several methods including labelled K13C15N are used to demonstrate that the reaction proceeds through the ANRORC mechanism.
Dedicated to Professor Henk van der Plas on his 70th birthday.
For No. 2, see [1].
Urals State Technical University, Ekaterinburg 620002, Russia; e-mail: mike@htf.ustu.ru. Translated from Khimiya Geterotsiklicheskikh
Soedinenii, No. 4, pp. 532–535, April, 1999. 相似文献
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O. S. Kukovinets T. I. Zvereva A. G. Kukovinets M. I. Abdullin F. Z. Galin 《Russian Journal of Organic Chemistry》2006,42(10):1448-1452
Complete ozonolysis of the thermal dimer of piperylene, 3-methyl-4-(prop-1-en-1-yl)cyclohexene, followed by reduction of primary peroxy compounds with dimethyl sulfide, gave 2-methyl-3-formyl-1,6-hexanedial as the major product and five-and six-membered hydroxy lactones which were formed via intramolecular cyclization of peroxides with participation of oxygen-containing functional groups. 相似文献
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合成了1-(4-硝基苯基)-3-(3,5-二溴吡啶)三氮烯(NPDBPDT),并研究了NPDBPDT与汞的显色反应.在Na2B4O7-NaOH缓冲溶液(pH11.0)介质中,在Triton X-100存在下Hg(Ⅱ)与试剂生成络合物(1∶2).络合物在450 nm处有最大正吸收峰,表观摩尔吸光系数为1.36×105 L·mol-1·cm-1,在535 nm处有最大负吸收峰,表观摩尔吸光系数为1.57×105 L·mol-1·cm-1,以535 nm为参比波长,以450 nm为测量波长进行双波长测定,表观摩尔吸光系数为2.93×105 L·mol-1·cm-1.汞量在0~0.48 μg/mL范围内符合比耳定律. 相似文献
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V. V. Bakharev A. A. Gidaspov E. V. Selezneva V. E. Parfenov I. V. Ulˈyankina I. S. Nazarova Yu. T. Palatova O. S. Elˈtsov 《Chemistry of Heterocyclic Compounds》2012,47(10):1258-1267
Heating 4-R-methoxy-1,3,5-triazin-2-ylnitroformaldoximes with nitriles leads not to the formation of 1,2,4-oxadiazoles but
rather to dimerization of the intermediate 1,3,5-triazinylnitrile oxides to give furoxanes. The reaction of 4-R-6-methoxy-1,3,5-triazin-2-ylnitroformaldoximes
with ammonia and amines gives 1,3,5-triazinylamidoximes, which upon acylation and subsequent intramolecular cyclization yield
(5-R-1,2,4-oxadiazol-3-yl)-1,3,5-triazines. 相似文献
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T. V. Shokol V. A. Turov A. V. Turov N. V. Krivokhizha V. V. Semenyuchenko V. P. Khilya 《Chemistry of Heterocyclic Compounds》2005,41(11):1411-1418
The condensation of 4-phenyl-1,2,4-triazol-3-ylacetonitrile with 2-methyl-, 4-ethylresorcinol, and with pyrogallol gave α-(4-phenyl-1,2,4-triazol-3-yl)-2,4-dihydroxyacetophenones.
Upon treatment with acid anhydrides and chlorides and subsequent hydrolysis these form 7-hydroxy-3-(4-phenyl)-1,2,4-triazol-3-yl)chromones
with different substituents in both the benzene and the pyrone rings.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 11, pp. 1676–1684, November, 2005. 相似文献
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N-芳基-2-[(吡啶-4-基)羰基]氨基硫脲1a~1e用NaOH溶液环合, 得到3-巯基-4-芳基-5-(吡啶-4-基)-1,2,4-三唑(2a~2e), 经酯化, 肼解, 得S-{[4-芳基-5-(吡啶-4-基)]-1,2,4-三唑-3-基}巯乙酰肼(3a~3e), 再与3-甲酰基色酮(4a~4d)反应, 合成得到了一系列新化合物5a~5e, 6a~6e, 7a~7e, 8a~8e. 化合物的结构经元素分析, IR, 1H NMR和MS谱确证. 相似文献