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1.
N. S. Prostakov C. John Matthew V. A. Kurichev 《Chemistry of Heterocyclic Compounds》1967,3(5):692-694
Condensation of the methyl groups of 2, 5-dimethyl-4-phenylpyridine and 2, 5-dimethyl-4--phenylethylpyridine with some aromatic aldehydes is investigated. The cyclization of 2, 5-dimethyl-4-phenylpyridine to 3-methyl-2-azafluorene and some derivatives of the latter is effected. 相似文献
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2, 5-Dibenzoyl(di-p-toluoyl, di-p-anisoyl)-4-phenylpyridines, 2, 5-dimethyl-4-acetyl(propionyl)phenylpyridine N-oxides, and 2, 5-diamino-4-phenylpyridine have been obtained. 相似文献
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N. S. Prostakov L. M. Kirillova L. A. Gaivoronskaya V. P. Zvolinskii James Ernest Provençal 《Chemistry of Heterocyclic Compounds》1970,6(9):1143-1145
2, 5-Dimethyl-4-p-nitrobenzylpyridine has been prepared. Its nitro group has been reduced and its methylene group oxidized.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 9, pp 1225–1227, September, 1970. 相似文献
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N. S. Prostakov L. M. Kirillova V. P. Zvolinskii 《Chemistry of Heterocyclic Compounds》1970,6(9):1146-1149
5-Methyl-4-benzyl-2-styrylpyridine (II), its p-dimethylaminostyryl analog IV, and 5-methyl-4-benzyl-2-(1,3-dioxo-2-hydrindenyl)pyridine (V) have been prepared. II has been converted into 5-methyl-4-benzyl-2-phenylethynylpyridine (VII), 5-methyl-4-benzylpyridine-2-carboxylic acid (VIII), and 3-styryl-6, 7-benzoisoquinoline (X).Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 9, pp. 1228–1231, September, 1970. 相似文献
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Oxidation of 4-styryl-2-phenyl-5,6-benzoquinoline with potassium permanganate gave phenyl 2-phenyl-5,6-benzo-4-quinolyl diketone, 2-phenyl-4-formyl-5,6-benzoquinoline, 2-phenyl-5,6-benzocinchoninic acid, and benzoic acid. It is shown that phenyl 2-phenyl-5,6-benzo-4-quinolyl diketone is cleaved under the influence of OH? ions to the corresponding aldehydes and carboxylic acids; this is explained by the decisive effect of the acidity of the media on the direction of the reaction. 相似文献
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N. S. Prostakov N. N. Mikheeva S. K. Banerdzhi 《Chemistry of Heterocyclic Compounds》1970,4(2):204-204
4-Amino-1, 2, 5-trimethylpiperidine and (1, 2, 5-trimethyl-4-piperidyl)benzylideneamine are partially converted into, -lutidine as a result of dehydrogenation, desamination, and N-desalkylation over a type K-12 dehydrogenating catalyst. 相似文献
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Slow distillation of 5, 5, -dimethyl-2-pyrazoline isomerizes it to 5, 5-dimethyl-1-pyrazoline, and heating the latter with hydrazine hydrochloride reconverts it to the 2 isomer. This is the first experimental evidence that the 2 double bond in a pyrazoline can move to the 1 position, i. e., in a direction the reverse of that previously known. The 5, 5-dimethyl-1 -pyrazoline described is the simplest 1 pyrazoline hitherto isolated.The authors heartily thank A. A. Petrov for making it possible to chart the PMR spectra, and V. B. Lebedev and V. S. Stopskom for obtaining and treating the spectrograms. 相似文献
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A. I. Pavlyuchenko N. I. Smirnova E. I. Kovshev 《Chemistry of Heterocyclic Compounds》1985,21(10):1145-1147
New liquid-crystalline 2-(4-cyanophenyl)-5-(4-alkyl- and alkoxyphenyl)pyridines were obtained by condensation of 1-dimethylamino-3-dimethylimmonia-2-(4-alkyl- or alkoxyphenyl)-1-propene perchlorates with 4-cyanoacetophenone and subsequent conversion of the 1-dimethylamino-2-(p-alkyl- or alkoxyphenyl)-4-(p-cyanobenzoyl)-1,3-butadienes to 5-(4-alkyl- or alkoxyphenyl)-2-(4-cyanophenyl)pyrylium perchlorates and refluxing of the latter with ammonium acetate in acetic acid.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 10, pp. 1392–1394, October, 1985. 相似文献
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N. S. Prostakov A. T. Soldatenkov P. K. Radzhan T. É. Khil'bert 《Chemistry of Heterocyclic Compounds》1982,18(12):1287-1289
Alkyl-substituted 4-(2-furyl)pyridines are brominated and nitrated in the C5' position of the furan ring; however, they do not undergo electrophilic substitution reactions such as acetylation, formylation, and chloro- and aminomethylation. Furyl-substituted indolizines and tetrahydropyridines were obtained from quaternary salts of 2,6-dimethyl-4-(2-furyl)pyridine.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 12, pp. 1665–1667, December, 1982. 相似文献
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A. I. Pavlyuchenko G. V. Purvanetskas V. K. Daukshas N. I. Smirnova N. I. Korotkova E. I. Kovshev 《Chemistry of Heterocyclic Compounds》1984,20(5):515-518
The cyclization of trans-1-acrylyl-4-n-alkylcyclohexanes with trans-1-N-piperidino-1-alkenes was used to synthesize 3-n-alkyl-6-(trans-4-n-alkyl-cyclohexyl)-3,4-dihydro-2-N-piperidino-2H-pyrans, which were converted under the influence of hydroxylamine to 5-n-alkyl-2-(trans-4-n-alkylcyclohexyl)-pyridines. Problems in the stereochemistry of the cyclohexane derivatives in the investigated scheme of synthesis were examined.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 5, pp. 643–647, May, 1984. 相似文献
13.
4-羟基-2,5-二甲基-3(2H)呋喃酮的合成 总被引:3,自引:0,他引:3
总结了食品增香剂4-羟基-2.5-二甲基-3(2H)呋喃国的合成方法,包括近期的合成研究进展,对一些合成方法的优缺点作了评述。参考文献28篇。 相似文献
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1-Substituted 2-, 4-, and 5-cyanoimidazoles were produced by reaction of 3-cyclohexyl or 3-p-tolylimidazole 1-oxide and trimethylsilyl cyanide in the presence of triethylamine. The product composition depended on reaction temperature and solvent polarity. By proper choice of these parameters each isomer could be obtained selectively in reasonable yield. 相似文献
16.
A. Sh. Sharifkanov K. Kh. Tokmurzin T. G. Sarbaev 《Chemistry of Heterocyclic Compounds》1969,5(1):61-61
Synthesis of 1-(β-cyanoethyl)-4e-ethynyl-2e, 5e-dimethylpiperidin-4a-o1 and the corresponding 4e-vinyl compounds (β-isomers), 1-β-cyanoethyl-4a-ethynyl-2e, 5e-dimethylpiperidin-4c-ol (and the corresponding 4a-vinyl compound) (γ-isomers), and l-(β-cyanoethyl)-2e, 5a-dimethyl-4a-vinylpiperidin-4e-o1 (α-isomer) have been effected. 相似文献
17.
《Liquid crystals》1997,23(3):365-369
A new series of 2-(4- n -alkoxyphenyl)-5-(4-methylphenyl)pyridines (CH C H C H NC HOC H , n 1-10) (APMPP), which are teraryl compounds containing a pyridine ring in n 2 m 1 the centre position of the rigid core, was synthesized and the phase transitions of the homologues were studied using DSC measurements, polarizing optical microscopy and miscibility tests with terephthalylidene-bis-4- n -pentylaniline (TBPA). Only a nematic phase was found for the shorter alkoxy homologues with n 4. The longer alkoxy homologues with n 4 showed the sequence of enantiotropic phase transitions CrG-SmF-SmC-SmA-N-I, while a monotropic CrH phase was observed for the n 5-10 homologues. Interestingly, the polymesomorphisms appear when n is larger than 4. 3 6 4 5 3 6 4 相似文献
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N. S. Prostakov Sipeu Simo Moiz V. P. Zvolinskii V. V. Dorogov 《Chemistry of Heterocyclic Compounds》1972,8(1):85-88
New substituted 4-phenyl-2-benzyl- and 2,4-dibenzylpyridines were obtained, and some of their transformations were studied.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 1, pp. 91–94, January, 1972. 相似文献