共查询到20条相似文献,搜索用时 15 毫秒
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S. Yu. Kukushkin P. Yu. Ivanov L. M. Alekseeva K. I. Kobrakov V. G. Granik 《Russian Chemical Bulletin》2004,53(12):2856-2861
Methods for the synthesis of substituted pyrimido [4,5-a]- and pyrido[4,3-a]carbazoles were proposed. Condensation of 2-(dimethylaminomethylene)-6-methyl-2,3,4,9-tetrahydro-1H-carbazol-1-one with guanidine and thiourea afforded 2-amino-8-methyl-6,11-dihydro-5H-pyrimido[4,5-a]carbazole and 8-methyl-3,5,6,11-tetrahydro-2H-pyrimido[4,5-a]carbazole-2-thione, respectively. The reaction of cyano(6-methyl-2,3,4,9-tetrahydro-1H-carbazol-1-ylidene)acetamide with dimethylformamide dimethyl acetal gave N-(dimethylamino-methylene)cyano(6-methyl-2,3,4,9-tetrahydro-1H-carbazol-1-ylidene)acetamide. Cyclization of the latter yielded 1-cyano-8-methyl-3,5,6,11-tetrahydro-2H-pyrido[4,3-a]carbazol-2-one.__________Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 12, pp. 2740–2744, December, 2004. 相似文献
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E. V. Nosova G. N. Lipunova M. I. Kodess P. V. Vasil’eva V. N. Charushin 《Russian Chemical Bulletin》2004,53(10):2314-2318
Reactions of 2-aminopyridine and 2-amino-5-methylpyridine with 2,3,4,5-tetrafluorobenzoyl chloride afforded N,N’-diaroylpyridinium salts, which were converted into 6H-pyrido[1,2-a]quinazolin-6-ones by refluxing in toluene in the presence of triethylamine. The angular structure of the tricyclic derivatives obtained was confirmed by 19F and 13C NMR spectroscopy and 2D heteronuclear HetCOR and HMBC experiments.__________Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 10, pp. 2216–2220, October, 2004. 相似文献
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V. I. Terenin M. A. Butkevich A. P. Pleshkova 《Chemistry of Heterocyclic Compounds》2005,41(10):1327-1333
We have synthesized nitro derivatives of pyrrolo[1,2-a]pyrazines using a nitrating mixture and acetyl nitrate. We have obtained
the products of oxidation of the side chain of 1,6-substituted pyrrolo[1,2-a]-pyrazines.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 10, pp. 1579–1586, October, 2005. 相似文献
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V. I. Terenin E. V. Kabanova N. A. Tselishcheva A. S. Ivanov N. V. Zyk 《Chemistry of Heterocyclic Compounds》2007,43(8):1038-1043
A study was carried out on the reaction of pyrrolo[1,2-a]pyrazines containing an alkyl, aryl, or aralkyl substituent at C-1
with trifluoroacetic anhydride. Trifluoroacetylation products may be formed either by reaction in the pyrrole ring or at the
aryl or aralkyl groups at C-1. Products of electrophilic substitution at C-6 are formed in the trifluoroacetylation of pyrrolo[1,2-a]pyrazines
containing at C-1 a substituent bulkier than a methyl group but lacking substituents at C-6 (the α-position of the pyrrole
ring).
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 8, pp. 1226–1233, August, 2007. 相似文献
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Kh. S. Shikhaliev D. V. Kryl’skii A. Yu. Potapov M. Yu. Krysin 《Russian Chemical Bulletin》2005,54(12):2903-2904
Three-component condensation of 3-amino-1,2,4-triazole (or its 5-methyl and 5-methylthio derivatives), dimedone (or cyclohexane-1,3-dione),
and dimethylformamide dimethyl acetal afforded 8,8-R, R-8,9-dihydro[1,2,4]triazolo[1,5-a]quinazolin-6(7H)-ones.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 12, pp. 2805–2807, December, 2005. 相似文献
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T. E. Khoshtariya M. M. Matnadze N. T. Mirziashvili L. N. Kurkovskaya M. I. Sikharulidze T. O. Dzhashi 《Chemistry of Heterocyclic Compounds》2004,40(11):1454-1459
The Sandmeyer reaction was used to prepare 2,3-dioxo-2,3-dihydrobenzo[b]furoindoles which could be reduced with diborane or with complex hydrides to give the corresponding unsubstituted as well as the 3-hydroxybenzo[b]furoindoles.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No 11, pp. 1683–1689, November, 2004. 相似文献
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V. V. Lyaskovskyy Z. V. Voitenko V. A. Kovtunenko 《Chemistry of Heterocyclic Compounds》2007,43(3):253-276
Data on methods for the synthesis of isoindolo[2,1-a]benzimidazole and its derivatives and their chemical characteristics
are reviewed. Data from quantum-chemical calculations of certain structures are presented. Possible practical applications
of the compounds are indicated.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 3, pp. 323–351, March, 2007. 相似文献
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N. E. Golantsov A. V. Karchava V. M. Nosova M. A. Yurovskaya 《Russian Chemical Bulletin》2005,54(1):226-230
4-Substituted 1,2,3,4-tetrahydropyrazino[1,2-a]indoles were synthesized from 2-cyanoindole. (R)-4-Methyl-1,2,3,4-tetrahydropyrazino[1,2-a]indole was obtained by the Mitsunobu reaction. Stereoselective reduction of 4-substituted 1,2,3,4-tetrahydropyrazino[1,2-a]indoles gave 4-substituted 1,2,3,4,10,10a-hexahydropyrazino[1,2-a]indoles. (4R, 10aR)-4-Methyl-1,2,3,4,10,10a-hexahydropyrazino[1,2-a]indole was synthesized.__________Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 1, pp. 221–225, January, 2005. 相似文献
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P. A. Slepukhin G. L. Rusinov S. S. Dedeneva V. N. Charushin 《Russian Chemical Bulletin》2007,56(2):345-350
The reactions of 8-chlorotetrazolo[1,5-a]pyrazine with N-, O-, and S-nucleophiles involve the ipso substitution of the chlorine atom. Heating of this compound with benzotriazole or phenyltetrazole results in elimination
of the nitrogen molecule from one of the tetrazole rings to form new annelated azapentalenes.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 2, pp. 334–338, February, 2007. 相似文献
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M. V. Pryadeina Ya. V. Burgart M. I. Kodess V. I. Saloutin 《Russian Chemical Bulletin》2005,54(12):2841-2845
Cyclocondensation of 2-arylmethylidene-3-fluoroalkyl-oxopropionates with 2-amino-pyridine occurs at both the polyfluoroacylvinyl
and alkoxycarbonylvinyl fragments to give alkyl 4-aryl-2-polyfluoroalkyl-4H-pyrido[1,2-a]pyrimidine-3-carboxylates and 4-aryl-2-hydroxy-3-polyfluoroacyl-4H-pyrido[1,2-a]pyrimidines, respectively. When treated with copper(II) acetate, the pyrido[1,2-a]pyrimidines yield metal complexes.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 12, pp. 2745–2749, December, 2005. 相似文献
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Ahmad Shaabani Ebrahim Soleimani Ali Maleki 《Monatshefte für Chemie / Chemical Monthly》2007,138(1):73-76
Summary. The synthesis of 3-aminoimidazo[1,2-a]pyridines and 3-aminoimidazo[1,2-a]pyrazines through a condensation reaction of 2-aminopyridine or 2-aminopyrazine, aldehyde, and alkyl or aryl isocyanide in
high yields at room temperature in the presence of silica sulfuric acid is described. 相似文献
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A. Šačkus E. Valaitytė V. Amankavičienė U. Berg C. Schicktanz K. Schlothauer 《Chemistry of Heterocyclic Compounds》2007,43(9):1118-1123
Condensation of 1-cyanomethyl-2,3,3-trimethyl-3H-indolium perchlorate with ortho-hydroxy-substituted aromatic aldehydes afforded
1-cyanomethylindoline spiropyrans. The latter underwent rearrangement to bridged 1,3-benzoxazepino[3,2-a]indoles on treatment
with a base. The mechanism of the rearrangement includes generation of a carbanion stabilized by a cyano group.
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Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 9, pp. 1322–1328, September, 2007. 相似文献
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Nickel acetate promoted reaction of diethyl acetone-1,3-dicarboxylate with N-cyanobenzamidine led to ethyl 4-amino-6-ethoxycarbonylmethyl-2-phenylpyrimidine-5-carboxylate, upon treatment of which with
RNH2, the corresponding 6-(carbamoylmethyl)pyrimidines were obtained. Cyclization of the latter upon treatment with MeONa afforded
6-R-4-amino-7-hydroxy-2-phenylpyrido[4,3-d]pyrimidin-5(6H)-ones.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 11, pp. 2212–2214, November, 2007. 相似文献
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E. B. Tsupak M. A. Shevchenko V. V. Kostrub Yu. N. Tkachenko 《Russian Chemical Bulletin》2007,56(11):2330-2336
5-Aroyl-1,3,6-trimethyluracils were converted to pyrano[4,3-d]pyrimidinium salts. Reactions of the salts obtained with ammonia, primary amines, and hydrazine were studied.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 11, pp. 2251–2257, November, 2007. 相似文献