共查询到20条相似文献,搜索用时 31 毫秒
1.
A. N. Vasiliev Ya. S. Kayukov O. E. Nasakin A. N. Lyshchikov V. N. Nesterov O. V. Kayukova O. V. Poulkherovskaya 《Chemistry of Heterocyclic Compounds》2001,37(3):309-314
An unusual route has been found for the hydrolysis of 3-amino-1,1-dialkoxy-6,7-dialkyl-4-aryl-3a,4,5,7a-tetrahydro-1H-pyrrolo[3,4-c]pyridine-3a,7a-dicarbonitriles in acidic medium which leads to the formation of alkyl 5,6-dialkyl-2-amino-3-cyanopyridine-4-carboxylates. 相似文献
2.
A. N. Vasiliev Ya. S. Kayukov A. N. Lyshchikov O. E. Nasakin O. V. Kayukova 《Chemistry of Heterocyclic Compounds》2003,39(9):1182-1187
The reaction of alkyl 5,6-dialkyl-2-amino-3-cyano-4-pyridinecarboxylates with certain O-nucleophiles was investigated, as a result of which 6,7-dialkyl-4-amino-2,3-dihydro-1H-pyrrolo[3,4-c]pyridine-1,3-diones were synthesized. 相似文献
3.
The reactions of 3,3-dialkyl-2,3-dihydro-6-trifluoromethyl-4-pyrones with hydroxylamine hydrochloride afforded regioisomeric
3(5)-(1,1-dialkyl-2-hydroxyethyl)-5-hydroxy-5(3)-trifluoromethyl-Δ2-isoxazolines depending on the reaction conditions. The title compounds were also prepared from 2,2-dialkyl-5-amino-1-hydroxy-6,6,6-trifluorohex-4-en-3-ones.
The above dihydropyrones reacted with hydroxylamine (base) to yield 3-(1,1-dialkyl-2-hydroxyethyl)-5-hydroxy-5-trifluoromethyl-Δ2-isoxazolines.
Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 7, pp. 1334–1339, July, 1999. 相似文献
4.
A. N. Vasiliev A. N. Lyshchikov O. E. Nasakin Ya. S. Kayukov 《Chemistry of Heterocyclic Compounds》2004,40(4):460-464
An unusual direction has been found for the interaction of alkyl 5,6-dialkyl-2-amino-3-cyanopyridine-4-carboxylates with primary amines leading to the formation of 2,6,7-trialkyl-4-amino-2,3-dihydro-1H-pyrrolo[3,4-c]pyridine-1,3-diones. 相似文献
5.
Yoichi Yamada Heinosuke Yasuda Yuichi Yoshihara Kazue Yoshizawa 《Journal of heterocyclic chemistry》1999,36(5):1317-1321
A series of ethyl 7-amino-2,4-dioxopteridine-6-carboxylates 4 and ethyl 7-amino-4-oxo-2-thioxopteridine-6-carboxylates 5 , of interest biologically, has been prepared in one step from the reaction of such vicinal-diamines as 1,3-dialkyl-5,6-diaminouracils 2 or 1,3-dialkyl-5,6-diamino-2-thiouracils 3 with diethyl (E)-2,3-dicyanobutenedioate ( 1 ). Moreover, ethyl 3-amino[1,2,4]triazino[2,3-a]-1H-benzimidazole-2-carboxylate ( 11 ) was also obtained from the reaction between 1,2-diamino-1H-benzimidazole ( 10 ) and 1 . The structural studies of 4, 5 , and 11 prepared were carried out by nmr experiments in some details. 相似文献
6.
A. V. Sergievskii T. V. Romanova S. F. Mel’nikova I. V. Tselinskii 《Russian Journal of Organic Chemistry》2005,41(2):261-267
Alkylation of 3,5-bis(4-amino-1,2,5-oxadiazol-3-yl)-1,2,4-triazole with haloalkanes afforded N-CH2R derivatives, and nitration furnished the corresponding bis-N-nitramine isolated as a trisodium salt. Treatment of the latter with CH3I resulted in denitration. Diazotization and oxidation of 3,5-bis(4-amino-1,2,5-oxadiazol-3-yl)-1,2,4- triazole, its N-methyl and N-carboxy derivatives gave rise to the corresponding azido and nitro derivatives. Salts of 3,5-bis(4-amino-1,2,5-oxadiazol-3-yl)-1,2,4-triazol-5-acetic acid with nitrogen-containing bases were synthesized. It was established that the character of reaction products of 3,5-bis(4-amino-1,2,5-oxadiazol-3-yl)-1,2,4-triazole with formaldehyde depended on the acid-base properties of the medium.__________Translated from Zhurnal Organicheskoi Khirmii, Vol. 41, No. 2, 2005, pp. 270–276.Original Russian Text Copyright © 2005 by Sergievskii, Romanova, Mel’nikova, Tselinskii. 相似文献
7.
V. A. Mamedov A. A. Kalinin A. T. Gubaidullin O. G. Isaikina I. A. Litvinov 《Russian Journal of Organic Chemistry》2005,41(4):599-606
A new and effective procedure was developed for the synthesis of 3-ethylquinoxalin-2(1H)-one from o-phenylenediamine and ethyl 2-oxobutanoate. The latter was prepared by the Grignard reaction of diethyl oxalate with ethylmagnesium bromide or iodide. The ethyl group in 3-ethylquinoxalin-2(1H)-one can readily be converted into various functional groups: α-bromoethyl, α-thiocyanato, α-azidoethyl, α-phenylaminoethyl, acetyl, and bromoacetyl. The reaction of 3-(bromoacetyl)quinoxalin-2(1H)-one with thiourea and hydrazine-1,2-dicarbothioamide gives the corresponding 3-(2-amino-4-thiazolyl) derivatives.__________Translated from Zhurnal Organicheskoi Khimii, Vol. 41, No. 4, 2005, pp. 609–616.Original Russian Text Copyright © 2005 by Mamedov, Kalinin, Gubaidullin, Isaikina, Litvinov. 相似文献
8.
Ya. S. Kayukov O. E. Nasakin Ya. G. Urman V. N. Khrustalev V. N. Nesterov M. Yu. Antipin A. N. Lyshchikov P. M. Lukin 《Chemistry of Heterocyclic Compounds》1997,33(3):310-317
Depending on the reaction conditions, 2-aryl-1,2,3,4-tetrahydropyridine-3,3,4,4-tetracarbonitriles react with alcohols, thiols and ketoximes to give 3-amino-4-aryl-1,1-di[R-oxy(thio)]-6,7-dialkyl-3a,4,5,7a-tetrahydro-1H-pyrrolo[3,4-c]pyridine-3a, 7a-dicarbonitrles or 2-aryl-5,6-dialkylpyridine-3,4-dicarbonitriles.Chuvash State University, Cheboksary 428015. Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 3, pp. 367–375, March, 1997. 相似文献
9.
V. A. Glushkov V. I. Karmanov Yu. V. Shklyaev 《Chemistry of Heterocyclic Compounds》2005,41(4):475-480
3,3,-Dialkyl-1-cyano-3,4-dihydroisoquinolines were prepared by Beckmann defragmentation of ethyl α-(3,3-dialkyl-3,4-dihydroisoquinol-1-yl)-α-hydroximinoacetates and they take part in a Ritter reaction to form substituted bis-1,1′-(3,4-dihydroisoquinolines).__________Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 4, pp. 558–563, April, 2005. 相似文献
10.
Substituted benz[g]indole-6,9-diones were synthesized by intramolecular cyclization of 6-alkynyl-5-amino-3-diethylamino-1,-4-naphthoquinones. A method was developed for the preparation of 2-aryl(or alkyl)-4,9-bis(dialkylamino)benzo[h]quinoline-7,10-diones, which involves the addition of a secondary amine to 6-acylethynyl-5-amino-3-diethylamino-1,-4-naphthoquinone followed by cyclization of the resulting adduct.__________Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 2, pp. 412–418, February, 2005. 相似文献
11.
Denis S. Baranov Aleksey A. Ryabichev Victor I. Mamatyuk Yurii V. Gatilov Victor G. Kartsev Sergei F. Vasilevsky 《Mendeleev Communications》2012,22(2):114-116
Reaction between 2-alkyl-4-arylbut-3-yn-2-ols and guanidine in refluxing pyridine affords 2-amino-5,5-dialkyl-4-arylmethylidene-2-oxazolines. 相似文献
12.
M. M. Vartanyan O. L. Eliseev T. Yu. Solov'eva V. A. Petukhov 《Russian Chemical Bulletin》1993,42(11):1921-1922
The reaction of 3-formyl-2-methoxy-1,6-dioxaspiro[4.4]nonanes with 3-amino-1,2,4-triazole gives 2-(1,2,4-triazolo[1,5-a]pyrimid-6-yl)methylenetetrahydrofurans in 51–65% yields.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 11, pp. 2004–2005, November, 1993. 相似文献
13.
D. V. Kryl’skii Kh. S. Shikhaliev A. S. Shestakov M. M. Liberman 《Russian Journal of General Chemistry》2005,75(2):303-310
The reactions of arylbiguanides with acetyacetone derivatives were used to obtain N-(pyrimidin-2-yl)-N′-arylguanidines, and the reactions with acetoacetic ester derivatives (depending on the structure of the keto esters), N-aryl-N′-(4-oxo-3,4-dihydropyrimidin-2-yl)guanidines or 2-amino-4-arylamino-6-aryl(heteryl)-sulfanylmethylene-1,3,5-triazines. The N-aryl-N′-heterylguanidines formed by the reactions with anhydrides, acyl halides, and aryl isocyanates give rise to the corresponding triaza derivatives.__________Translated from Zhurnal Obshchei Khimii, Vol. 75, No. 2, 2005, pp. 331–339.Original Russian Text Copyright © 2005 by Kryl’skii, Shikhaliev, Shestakov, Liberman. 相似文献
14.
O. E. Nasakin P. M. Lukin A. N. Lyshchikov S. Soro V. N. Khrustalev Yu. T. Struchkov 《Russian Chemical Bulletin》1996,45(1):237-238
The reaction of 1,1,2,2-tetracyanoethane (1) with -alkylacrole ins in isopropyl alcohol affords 3-alkyl-2-amino-3-(isopropoxy)hydroxymethyl-1,5,5-tricyanocyclopentenes (2a,b) and 2,7-dialkyl-1,8-diisopropoxy-4,4,5,5-tetracyanoocta-1,7-die nes (3a,b). The structure of molecule3b has been established by X-ray structural analysis.Deceased in 1995. mis Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 1, pp. 246–247, January, 1996. 相似文献
15.
A. N. Vasil’ev A. N. Lyshchikov O. E. Nasakin S. A. Paramonov Ya. S. Kayukov 《Russian Journal of Organic Chemistry》2007,43(10):1537-1544
In reaction of alkyl 2-amino-5,6-dialkyl-3-cyanopyridine-4-carboxylates with isocyanates formed unstable ureas, and with nitrous acid at 60–70°C alkyl 5,6-dialkyl-2-oxo-1,2-dihydro-4-pyidinecarboxylates were obtained. It was shown for the latter that their reactions with organic acids and amides occurred at the cyano group, and the alkaline hydrolysis involved the ester group. 相似文献
16.
Sh. H. Abdel-Hafez 《Russian Journal of Organic Chemistry》2005,41(3):396-401
Reaction of 2-amino-4,5,6,7-tetrahydro-1-benzoselenophene-3-carbonitrile with ethylenediamine in the presence of a catalytic amount of carbon disulfide afforded 2-amino-3-(4,5-dihydro-1H-imidazol-2-yl)-4,5,6,7-tetrahydro-1-benzoselenophene. Cyclocondensation of the latter with triethyl orthoformate, benzaldehyde, and carbon disulfide gave tetracyclic imidazobenzoselenophenopyrimidine derivatives. Treatment of 2,3,5,6,8,9,10,11-octahydroimidazo[2,1-c][1]benzoselenopheno[3,2-e]pyrimidine-5-thione with hydrazine hydrate led to the corresponding 5-hydrazino derivative whose reactions with triethyl orthoformate and sodium nitrite were accompanied by closure of 1,2,4-triazole and tetrazole rings, respectively. Fused benzoseleno-phenopyrimidine systems were also obtained by reaction of 2-amino-4,5,6,7-tetrahydrobenzo-1-selenophene-3-carbonitrile with formamide, carbon disulfide, and phenyl isothiocyanate. Some newly synthesized compounds were tested for antimicrobial and antifungal activity.__________From Zhurnal Organicheskoi Khimii, Vol. 41, No. 3, 2005, pp. 406–410.Original English Text Copyright © 2005 by Abdel-Hafez.The original article was submitted in English.This study was presented at the 7th IUPAC International Conference on Heteroatom Chemistry (ICHAC-7), Shanghai, August 20–25, 2004. 相似文献
17.
E. V. Kondrashov I. B. Rozentsveig G. I. Sarapulova L. I. Larina G. G. Levkovskaya V. A. Savosik G. V. Bozhenkov A. N. Mirskova 《Russian Journal of Organic Chemistry》2005,41(5):735-738
Reactions of trifluoromethanesulfonic acid N-(2,2,2-trichloroethylidene)amide with 1,3-dialkyl-5-chloropyrazoles and 1-phenyl-3-methylpyrazole afforded 4-(amidotrichloroethyl)-substituted pyrazole derivatives. 4-Chloropyrazoles were not involved into this process. The structure of compounds synthesized was studied by means of IR and NMR spectroscopy. The presence of intra- and intermolecular hydrogen bonds was revealed by a decrease in the absorption frequencies and a complicated form of ν(NH) and νas(SO2) absorption bands in the IR spectra, and also in splitting of signals in 1H and 13C NMR spectra.__________Translated from Zhurnal Organicheskoi Khimii, Vol. 41, No. 5, 2005, pp. 749–752.Original Russian Text Copyright © 2005 by Kondrashov, Rozentsveig, Sarapulova, Larina, Levkovskaya, Savosik, Bozhenkov, Mirskova. 相似文献
18.
A. G. Mal’kina L. V. Sokolyanskaya R. N. Kudyakova L. M. Sinegovskaya A. I. Albanov O. A. Shemyakina B. A. Trofimov 《Russian Journal of Organic Chemistry》2005,41(1):61-66
Nucleophilic addition of ammonia (25% aqueous solution) and methylamine to 4-hydroxy-4,4-diphenyl-2-butynenitrile occurs under mild conditions to afford 4-amino(or methylamino)-2,5-dihydro-5,5-diphenyl-2-iminofurans. 4-Hydroxy-4,4-diphenyl-2-butynenitrile in anhydrous liquid ammonia gives rise to 3-amino-4-hydroxy-4,4-diphenyl-2- butenenitrile which is quantitatively converted into the corresponding iminodihydrofuran or iminodihydrofuran hydrochloride in the presence of 10 wt % of KOH or gaseous hydrogen chloride. 4-Amino- and 4-methylamino-2-iminofurans react with 4-hydroxy-4-methyl-2-pentynenitrile to give 3-(4-amino- and 4-methylamino-5,5-diphenyl-2,5-dihydrofuran-2-ylideneamino)-4-hydroxy-4-methyl-2-pentenenitriles.__________Translated from Zhurnal Organicheskoi Khimii, Vol. 41, No. 1, 2005, pp. 64–69.Original Russian Text Copyright © 2005 by Mal’kina, Sokolyanskaya, Kudyakova, Sinegovskaya, Albanov, Shemyakina, Trofimov. 相似文献
19.
N. N. Smolyar O. Yu. Pankina A. I. Bondarenko Ya. S. Borodkin A. I. Khizhan 《Russian Journal of Organic Chemistry》2011,47(8):1190-1193
Reactions of 5-amino-1,3-dialkyl-1,3-dihydrobenzimidazol-2-ones with 2,5-dimethoxytetrahydrofuran and 2,6-dimethyl-γ-pyranone
led to the formation of 1,3-dialkyl-1,3-dihydro-5-(pyrrol-1-andл)benzimidazol-2-ones and 1-(1,3-dialkyl-2-oxo-1,3-dihydrobenzimidazol-5-yl)-2,6-dimethylpyridin-4-ones. 相似文献
20.
A. V. Lebedev A. B. Lebedeva V. D. Sheludyakov E. A. Kovaleva O. L. Ustinova I. B. Kozhevnikov 《Russian Journal of General Chemistry》2005,75(3):412-416
Formylation of ten accessible phenylhydrazones and semicarbazones derived from alkyl, benzyl, and cycloalkyl methyl ketones with the complex of POCl3 with dimethylformamide was studied. Depending on the electronic and steric structure of the substrates, the reaction yields 1-phenyl- or 1-unsubstituted 3,4-dialkyl-, 3-alkyl-4-aryl-, or 3-alkyl-4-formylpyrazoles. These compounds can be readily oxidized into the corresponding carboxylic acids.__________Translated from Zhurnal Obshchei Khimii, Vol. 75, No. 3, 2005, pp. 448–452.Original Russian Text Copyright © 2005 by Lebedev, Lebedeva, Sheludyakov, Kovaleva, Ustinova, Kozhevnikov. 相似文献