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1.
3-Aryl(heteryl)-4-formylpyrazoles in condensation with methyl aryl(heteryl) ketones afforded 1-aryl(heteryl)-3-[3-aryl(heteryl)-4-pyrazolyl]propenones. The latter reacted with phenylhydrazine yielding 1-phenyl-3-aryl(heteryl)-5-(4-pyrazolyl)-2-pyrazolines. 相似文献
2.
Cyclocondesation of 3-aryl(heteryl)pyrazole-4-carbaldehydes with ethyl acetoacetate and urea (thiourea) in the presence of FeCl3 · 6H2O afforded 3-aryl(heteryl)-4-(4-pyrazolyl)-1,2,3,4-tetrahydropyrimidin-2-ones(thiones).__________Translated from Zhurnal Organicheskoi Khimii, Vol. 41, No. 1, 2005, pp. 97–98.Original Russian Text Copyright © 2005 by Bratenko, Chornous, Vovk. 相似文献
3.
3-Aryl(heteryl)pyrazole-4-carbaldehydes were reduced with sodium tetrahydridoborate under mild conditions to give 3-aryl(heteryl)-4-hydroxymethylpyrazoles which were converted into the corresponding 4-chloromethyl derivatives by treatment with thionyl chloride. The subsequent reaction with triphenylphos- phine led to formation of triphenyl(4-pyrazolylmethyl)phosphonium chlorides, and Wittig reaction of the latter with aromatic or heteroaromatic aldehydes yielded 4-[2-aryl(heteryl)ethenyl]pyrazoles. 相似文献
4.
3-Aryl(heteryl)-4-formylpyrazoles were cleanly oxidized by potassium permanganate in water-pyridine medium to afford in high yield 3-aryl(heteryl)pyrazole-4-carboxylic acids, that were further converted into the corresponding chlorides and amides. 相似文献
5.
Chornous V. A. Mel'nichenko N. V. Bratenko M. K. Vovk M. V. 《Russian Journal of Organic Chemistry》2002,38(3):405-410
3-Aryl(heteryl)-1-phenyl-4-pyrazolecarbonyl isothiocyanates were synthesized by treatment of 3-aryl(heteryl)-1-phenyl-4-pyrazolecarbonyl chlorides with lead, sodium, or ammonium thiocyanate. Their reactions with amines, hydrazines, and acylhydrazines gave the corresponding thioureas and thiosemi- carbazides. 相似文献
6.
3-Aryl(heteryl)-4-formylpyrazoles by condensation with malonic acid furnish 3-[3-aryl(heteryl)- pyrazol-4-yl]propenoic acids that in the presence of Raney nickel are reduced by hydrazine hydrate to 3-[3-aryl(heteryl)pyrazol-4-yl]propanoic acids. The successive conversion of both type acids into the corresponding acyl chlorides, esters, and amides was performed. 相似文献
7.
By reaction of 3-aryl(heteryl)-4-chloromethylpyrazoles with thiourea and sodium thiocyanate respectively 3-aryl(heteryl)-4-mercaptomethylpyrazoles and 3-aryl(heteryl)-thiocyanatomethylpyrazoles were obtained. The latter were subjected to thermal isomerization into 3-aryl(heteryl)-isothiocyanatomethylpyrazoles. 相似文献
8.
M. K. Bratenko O. I. Panimarchuk V. A. Chornous M. V. Vovk 《Russian Journal of Organic Chemistry》2005,41(1):98-102
Reduction with sodium tetrahydridoborate of Schiff bases derived from 3-aryl(heteryl)pyrazole-4-carbaldehydes and benzylamines gave N-benzyl-N-[3-aryl(heteryl)-4-pyrazolylmethylene]amines which were acylated with benzoyl chloride and succinic and maleic anhydrides to obtain the corresponding amides. Treatment of the title compounds with phenyl isothiocyanate afforded substituted thioureas.__________Translated from Zhurnal Organicheskoi Khimii, Vol. 41, No. 1, 2005, pp. 98–103.Original Russian Text Copyright © 2005 by Bratenko, Panimarchuk, Chornous, Vovk. 相似文献
9.
M. K. Bratenko O. I. Panimarchuk N. V. Mel’nichenko M. V. Vovk 《Russian Journal of Organic Chemistry》2005,41(2):238-242
By reduction of 3-aryl(heteryl)-1-phenyl-4-azidomethyl-pyrazoles in the presence of Raney nickel or by hydrazinolysis of N-[3-aryl(heteryl)-1-phenyl-4-pyrazolylmethyl]phthalimides 4-pyrazolylmethylamines were obtained that in reaction with bis(trichloromethyl) carbonate afforded 3-aryl-(heteryl)-1-phenyl-4-pyrazolylmethyl isocyanates, and with carbon disulfide furnished 3-aryl-(heteryl)-1-phenyl-4-pyrazolylmethyl isothiocyanates.__________Translated from Zhurnal Organicheskoi Khimii, Vol. 41, No. 2, 2005, pp. 247–251.Original Russian Text Copyright © 2005 by Bratenko, Panimarchuk, Mel’nichenko, Vovk. 相似文献
10.
3-(4-Pyrazolyl)acrylic acids reacted with excess thionyl chloride in the presence of benzyltriethylammonium chloride affording 4-chlorothieno[2,3-c]pyrazole-5-carbonyl chlorides which were converted into the corresponding acids, esters, and amides. 相似文献
11.
12.
N. S. Kozlov L. F. Gladchenko V. A. Serzhanina G. S. Shmanai I. P. Stremok G. P. Korotyshova R. D. Sauts 《Chemistry of Heterocyclic Compounds》1978,14(4):418-422
The absorption and fluorescence spectra and the fluorescence quantum yields of 1-R-vinyl derivatives of benzo[f]quinoline containing aryl and 2-, 4-, and 6-quinolyl groups in the vinylene grouping and in the 3 position were studied. The relationship between the spectral-luminescence characteristics and the structures of the molecules was examined. It was established that solutions of compounds that contain a dimethylamino group attached to the phenyl ring give forced emission when they are excited with the second harmonic of a ruby laser. The effect of the solvent on the spectral-luminescence and generation characteristics of the indicated compounds was investigated.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 4, pp. 511–515, April, 1978. 相似文献
13.
M. V. Vovk N. V. Mel'nichenko V. A. Chornous M. K. Bratenko 《Russian Journal of Organic Chemistry》2001,37(12):1747-1752
1,3-Diaryl-4-isocyanatopyrazoles were obtained by reaction of 1,3-diarylpyrazole-4-carboxylic acids with ethyl chloroformate and sodium azide or by reaction of 1,3-diarylpyrazole-4-carbonyl chloride with trimethylsilyl azide. The title compounds react with amines, hydrazine hydrate, alcohols, phenols, and monochloroacetic acid to afford 4-pyrazolyl-substituted ureas, semicarbazides, urethanes, and amides respectively. 相似文献
14.
3-(3-Aryl-4-formyl-1-pyrazolyl)propionic acids are converted by Knoevenagel condensation under conditions of microwave activation
into 3-[3-aryl-1-(2-ethoxycarbonyl)-4-pyrazolyl]acrylic acids. Reduction of the latter with hydrazine hydrate in the presence
of Raney nickel gives 3-[3-aryl-1-(2-ethoxycarbonyl)-4-pyrazolyl]propionic acids.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 5, pp. 686–690, May, 2006. 相似文献
15.
16.
A. S. Morkovnik T. A. Kuz’menko L. N. Divaeva G. S. Borodkin 《Russian Journal of Organic Chemistry》2013,49(6):895-903
2-(4-Methylphenyl)-4H-[1,2,4]triazolo[1,5-a]benzimidazole and its previously unknown 2-(2-furyl)- and 2-(2-thienyl)-substituted analogs were synthesized by cyclization of benzimidazole-1,2-diamine with the corresponding carboxylic acid chlorides. The IR, 1H, 13C, and 15N NMR, and mass spectra of the cyclization products in combination with the results of quantum-chemical calculations of NMR chemical shifts showed radical differences of [1,2,4]triazolo[1,5-a]benzimidazoles having no substituent on N4 from the recently reported low-melting products of oxidation of 2-amino-1-arylmethylideneaminobenzimidazoles with (diacetoxy-λ3-iodanyl)benzene, which, as we believe, were erroneously assigned analogous structure. 相似文献
17.
N. M. Przheval’skii N. S. Skvortsova I. V. Magedov 《Chemistry of Heterocyclic Compounds》2004,40(11):1435-1441
The interaction of arylhydrazines with ù-(3,5-dimethyl-1-pyrazolyl)acetophenones and acetyl(2-thiophene) leads to arylhydrazones, which are converted by Fischer cyclization into 2-aryl(thienyl)-3-(3,3-dimethyl-1-pyrazolyl)indoles with substituents in positions 1, 5, and 7.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 11, pp. 1662–1669, November, 2004. 相似文献
18.
Several 4-aryl-l-[3-(2-aryl)indolyl]-3-thiosemiearbazones and 3-aryl-4-oxothiazolin-2-yl-[3-(2-aryl)indolyl] hydrazones were synthesized as possible antilertility agents. J. Heterocyclic Chem., 15 , 677 (1978) 相似文献
19.
An efficient method has been developed for the synthesis of 2-[3(5)-aryl(methyl)pyrazol-4-yl]-1H-benzimidazoles by cyclocondensation
of 2-acylmethyl-1H-benzimidazoles benzoylhydrazones with DMF dimethylacetal. The tautomerism of the compounds obtained via
migrations of a proton between the pyrazole nitrogen atoms has been studied by 1H NMR. The more stable tautomers have electron acceptor aryl substituents placed at position 3 of the pyrazole ring and electron
donor aryl substituents or a methyl at position 5.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 9, pp. 1370–1377, September, 2006. 相似文献