Chemistry of Heterocyclic Compounds
type: channel
description: Chemistry of Heterocyclic Compounds (Khimiya Geterotsiklicheskikh Soedinenii) publishes articles, short communications, reviews and minireviews on the synthesis, structure, reactivity and biological activity of heterocyclic compounds including natural products. The journal covers investigations in heterocyclic chemistry taking place in scientific centers all over the world. CHEMISTRY OF HETEROCYCLIC COMPOUNDS is a translation of the journal Khimiya Geterotsiklicheskikh Soedinenii, which is issued by the Latvian Institute of organic synthesis. Editor-in-Chief: D. Volochnyuk Deputy Editors: P. Arsenyan, S. Ryabukhin Managing Editor: M. Teus Production Editors: N. Zhuk, A. Amoliņš Production Editor of the English Issue: N. Vereteņņikova Advisory Board: O. N. Chupakhin, G. Duburs, I. Kalvinsh, V. G. Kartsev, M. Makosza, V. I. Minkin, H. van der Plas, A. F. Pozharskii, A. A. Tolmachev, B. A. Trofimov, R. Valters, A. V. Varlamov Editorial Board: V. T. Abaev, A. V. Aksenov, N. A. Bumagin, V. A. Chebanov, S. M. Desenko, V. V. Dotsenko, L. L. Fershtat, V. Gevorgyan, B. Gnanaprakasam, O. O. Grygorenko, A. V. Gulevskaya, A. Gutnov, R. Jasiński, A. Kornienko, M. A. Kuznetsov, T. Opatz, V. A. Ostrovskii, A. E. Shchekotikhin, A. B. Sheremetev, Yu. G. Shermolovych, V. Z. Shirinian, V. Ya. Sosnovskikh, I. V. Trushkov, M. Turks, E. N. Ulomsky, A. V. Vasilyev, A. N. Vereshchagin, L. G. Voskressensky
publisher: Latvian Institute of Organic Synthesis
language: en-US
publication name: Chemistry of Heterocyclic Compounds
issn: 0132-6244
items: Dihydroazolopyrimidines with a nodal nitrogen atom: Synthesis, reactions, tatutomerism
items: ОБЗОРЫ ПО ОТДЕЛЬНЫМ ВОПРОСАМ ХИМИИ ГЕТЕРОЦИКЛОВ
items: ОБЗОРЫ, КАСАЮЩИЕСЯ БИОЛОГИЧЕСКИ АКТИВНЫХ ГЕТЕРОЦИКЛОВ
items: ОБЗОРЫ ПО ОБЩИМ ВОПРОСАМ ОРГАНИЧЕСКОЙ ХИМИИ, ЗАТРАГИВАЮЩИЕ ХИМИЮ ГЕТЕРОЦИКЛОВ
items: Reaction of substituted 1,3-dioxanes with the disobutyl ester of isobutylboric acid
items: Alkylation of N-methylpyrrole with tert-butanol in the presence of Amberlyst 15 ion exchanger
items: Heterocyclization of N-propionylaminoindoline
items: Aggregation properties of copper dibenzobarrelenophthalocyanine
items: Synthesis of pyrazoles from ethyl-3-diazopyruvate
items: Photoinduced N-β-hydroxyalkylation of tropan derivatives
items: The molecular complex of 4-(N-pyridinium)pyridine-N-oxide chloride with tetracyanoethylene in the synthesis of substituted pyridine N-oxides
items: Synthesis and properties of dithioacetals of conformationally constrained α-acyl-β-aminovinyl ketones of the 8-azasteroid
items: 4-Hydroxy-2-quinolones. 20. Synthesis and chemical conversions of ehtyl esters of the chloro-substituted quinoline-3-carboxylic acids
items: 4-Hydroxy-2-quinolones. 26. Bromination of 3-substituted 2-oxo-4-hydroxyquinolones
items: Investigation of bisheteryl derivatives of piperazine and its analogs. 2. Synthesis and properties of bis(dialkyldithiocarbamoyl-5-nitro-4-pyrimidyl)piperazines
items: Iodocyclization of 2-allythio-4(3H)-pyrimidinones
items: Synthesis and properties of derivatives of sym-triazine. 15. Synthesis of amine derivatives of sym-triazine that contain indole groups
items: http://cohc.osi.lv/index.php/hgs/article/view/11096
items: Synthesis of several heteryldehydropeptides by the oxazolone method
items: New 4(5H)-oxazolonium perchlorate derivatives
items: Synthesis and properties of furan derivatives. 4. Synthesis of 2,5-disubstituted 1,3,4-oxadiazoles containing furan fragments
items: Synthesis of dihydro-10H-pyrano[3′,4′: 5,6]pyrido[3,2:4″,5″]-thieno[3″,2″-d][3,1]oxazines and -pyrimidines
items: Synthesis and stereochemistry of chiral azetidin-2-ones and azetidine-2-thiones. 3. Stereodirected construction of the β-lactam fragment of the thienamycin molecule
items: ESR spectra of electrochemically generated free anion radicals of hetaryl-substituted trichloro-1,4-benzoquinones
items: http://cohc.osi.lv/index.php/hgs/article/view/11089
items: Synthesis of 11-N-arylaminomethylene derivatives of 8-azasteroies. A new rection of cyclic Schiff's bases
items: Cyclization of 5-diazoimidazole-4-carbonitrile
items: 4-Methyl-3-cyanopyridin-2(1H)-thione
items: Reaction of amino-imino-1H-isoindole with α-bromoketones
items: Synthesis of 2-oxooxazolo[5,4-b]pyridines and their reactions with amines
items: 1-Methyl-2-alkylbenzimidazole organomagnesium compounds
items: Synthesis of N-ethoxycarbonyl-β-aminoketones —key intermediated for the preparation of nitrogen-containing heterocycles
items: Reaction of cyclic sulfites with acetonitrile

Dihydroazolopyrimidines with a nodal nitrogen atom: Synthesis, reactions, tatutomerism
type: item
description: The published data on methods of synthesis of dihydro derivatives of azolopyrimidines with a nodal nitrogen atom are generalized; their applicability is comparatively analyzed. The chemical properties of dihydroazolopyrimidine systems are examined; the intra- and intermolecular factors that determine the position of imine—enamine tautomeric equilibrium are analyzed. How to Cite Desenko, S. M. Chem. Heterocycl. Compd. 1995, 31, 125. [Khim. Geterotsikl. Soedin. 1995, 147.] For this article in the English edition, see DOI https://doi.org/10.1007/BF01169665
creator: С. М. Деceнко
rights: Copyright (c) 2026 Chemistry of Heterocyclic Compounds
date: 1995-02-25
publication date: 1995-02-25
number: 2
starting page: 147
ending page: 159

ОБЗОРЫ ПО ОТДЕЛЬНЫМ ВОПРОСАМ ХИМИИ ГЕТЕРОЦИКЛОВ
type: item
description: Как ссылаться Химия гетероцикл. соединений 1995, 276.
creator: Н. Д. Кручковская
rights: Copyright (c) 2026 Chemistry of Heterocyclic Compounds
date: 1995-02-25
publication date: 1995-02-25
number: 2
starting page: 276
ending page: 278

ОБЗОРЫ, КАСАЮЩИЕСЯ БИОЛОГИЧЕСКИ АКТИВНЫХ ГЕТЕРОЦИКЛОВ
type: item
description: Как ссылаться Химия гетероцикл. соединений 1995, 278.
creator: Н. Д. Кручковская
rights: Copyright (c) 2026 Chemistry of Heterocyclic Compounds
date: 1995-02-25
publication date: 1995-02-25
number: 2
starting page: 278
ending page: 281

ОБЗОРЫ ПО ОБЩИМ ВОПРОСАМ ОРГАНИЧЕСКОЙ ХИМИИ, ЗАТРАГИВАЮЩИЕ ХИМИЮ ГЕТЕРОЦИКЛОВ
type: item
description: Как ссылаться Химия гетероцикл. соединений 1995, 281.
creator: Н. Д. Кручковская
rights: Copyright (c) 2026 Chemistry of Heterocyclic Compounds
date: 1995-02-25
publication date: 1995-02-25
number: 2
starting page: 281
ending page: 285

Reaction of substituted 1,3-dioxanes with the disobutyl ester of isobutylboric acid
type: item
description: The reaction of subsitituted 1,3-dioxanes with the diisobutyl ester of isobutylboric acid leads to the corresponding 1,3,2-dixaborinanes. The determining factor in the reactivity of the 1,3-dioxanes is the degree of substitution of the acetal atom. How to Cite Kuznetsov, V. V.; Tereshchenko, A. V.; Gren', A. I. Chem. Heterocycl. Compd. 1995, 31, 137. [Khim. Geterotsikl. Soedin. 1995, 160.] For this article in the English edition, see DOI https://doi.org/10.1007/BF01169666
creator: B. В. Кузнецов
creator: А. B. Терещенко
creator: А. И. Грень
rights: Copyright (c) 2026 Chemistry of Heterocyclic Compounds
date: 1995-02-25
publication date: 1995-02-25
number: 2
starting page: 160
ending page: 162

Alkylation of N-methylpyrrole with tert-butanol in the presence of Amberlyst 15 ion exchanger
type: item
description: The 2- and 3-tert-butylderivatives of 1-methylpyrrole, hitherto unknown, have been obtained by a single-stage method. The process is characterized by a low positional selectivity with a somewhat predonminating β-substitution. The results have been compared with data, obtained by the quantum-chemical calculation of the molecules of pyrrole, N-methylpyrrole, and also of their σ-complexes with protons, introduced in the α- and β-position of the rings. How to Cite Iovel', I.; Fleisher, M.; Popelis, Yu.; Shimanska, M.; Lukevits, E. Chem. Heterocycl. Compd. 1995, 31, 140. [Khim. Geterotsikl. Soedin. 1995, 163.] For this article in the English edition, see DOI https://doi.org/10.1007/BF01169667
creator: И. Иовель
creator: М. Флeйшер
creator: Ю. Попелис
creator: М. Шиманска
creator: Э. Лyкевиц
rights: Copyright (c) 2026 Chemistry of Heterocyclic Compounds
date: 1995-02-25
publication date: 1995-02-25
number: 2
starting page: 163
ending page: 167

Heterocyclization of N-propionylaminoindoline
type: item
description: Treatment of N-propionylaminoindoline with a solution of phosgene in benzene gives the 1-[(indolin-1-yl)imino]propyl ester of 7-(1-cyanoethyl)indoline-1-carboxylic acid. The structure of the compound was proved using 1H and 13C NMR spectroscopy. How to Cite Zhestkov, V. P.; Barinova, V. N.; Portnov, Yu. N.; Chernyshev, A. I. Chem. Heterocycl. Compd. 1995, 31, 144. [Khim. Geterotsikl. Soedin. 1995, 168.] For this article in the English edition, see DOI https://doi.org/10.1007/BF01169668
creator: В. П. Жестков
creator: В. Н. Баринова
creator: Ю. Н. Портнов
creator: А. И. Чернышев
rights: Copyright (c) 2026 Chemistry of Heterocyclic Compounds
date: 1995-02-25
publication date: 1995-02-25
number: 2
starting page: 168
ending page: 170

Aggregation properties of copper dibenzobarrelenophthalocyanine
type: item
description: Depending on the solvent in which they are placed or from which they have been obtained, sterically hindered copper octa-tert-butyltetra-4,5-dibenzobarrelenophthalocyanines in solution and as a powder can take a monomeric form or dimer or trimer aggregate forms. In the aggregates, the molecules are disposed opposite one another around a high-order axis at an angle of 45° from equatorial displacement. How to Cite Selyutin, G. E.; Podrugina, T. A.; Gal'pern, M. G.; Luk'yanets, E. A. Chem. Heterocycl. Compd. 1995, 31, 146. [Khim. Geterotsikl. Soedin. 1995, 171.] For this article in the English edition, see DOI https://doi.org/10.1007/BF01169669
creator: Г. Е. Селютин
creator: Т. А. Подругина
creator: М. Г. Гальперн
creator: Е. А Лукъянец
rights: Copyright (c) 2026 Chemistry of Heterocyclic Compounds
date: 1995-02-25
publication date: 1995-02-25
number: 2
starting page: 171
ending page: 175

Synthesis of pyrazoles from ethyl-3-diazopyruvate
type: item
description: 1,3-Dipolar cycloaddition to ethyl-3-diazopyruvate and its hydrazide gives the corresponding polycarbonyl pyrazoles. How to Cite Sukhotin, A. V.; Kartsev, V. G.; Kobrakov, K. I.; Serov, A. B. Chem. Heterocycl. Compd. 1995, 31, 150. [Khim. Geterotsikl. Soedin. 1995, 176.] For this article in the English edition, see DOI https://doi.org/10.1007/BF01169670
creator: А. B. Сукотин
creator: В. Г. Карцев
creator: K. И. Кобраков
creator: А. Б. Серов
rights: Copyright (c) 2026 Chemistry of Heterocyclic Compounds
date: 1995-02-25
publication date: 1995-02-25
number: 2
starting page: 176
ending page: 178

Photoinduced N-β-hydroxyalkylation of tropan derivatives
type: item
description: The photooxidation of tropan derivatives by ketones was studied; the targeting of the reaction to the N-CH3 group with the formation of N-alkylation products and bis-tropan derivatives was demonstrated. The presence of two diastereomers in salts of N-alkyl derivatives of tropan was detected by PMR spectroscopy. An alternative method of synthesis of difficult-to-obtain amino alcohols was proposed. How to Cite Kostochka, L. M.; Skoldinov, A. P.; Lezina, V. P. Chem. Heterocycl. Compd. 1995, 31, 153. [Khim. Geterotsikl. Soedin. 1995, 179.] For this article in the English edition, see DOI https://doi.org/10.1007/BF01169671
creator: Л. М. Косточка
creator: А. П. Сколдинов
creator: B. П. Лезина
rights: Copyright (c) 2026 Chemistry of Heterocyclic Compounds
date: 1995-02-25
publication date: 1995-02-25
number: 2
starting page: 179
ending page: 183

The molecular complex of 4-(N-pyridinium)pyridine-N-oxide chloride with tetracyanoethylene in the synthesis of substituted pyridine N-oxides
type: item
description: The structure of the complex of 4-(N-pyridinium)pyridine-N-oxide chloride with tetracyanoethylene was studied by 13C NMR spectroscopy. The results of the investigation, suggesting the use of this complex in the synthesis of substituted pyridine derivatives, were conformed experimentally by its reaction with oxygen- and nitrogen-containing nucleophiles. How to Cite Rodina, L. L.; Ryzhakov, A. V.; Alekseeva, O. O. Chem. Heterocycl. Compd. 1995, 31, 157. [Khim. Geterotsikl. Soedin. 1995, 184.] For this article in the English edition, see DOI https://doi.org/10.1007/BF01169672
creator: Л. Л. Родина
creator: А. В. Рыжаков
creator: O. О. Алексеева
rights: Copyright (c) 2026 Chemistry of Heterocyclic Compounds
date: 1995-02-25
publication date: 1995-02-25
number: 2
starting page: 184
ending page: 186

Synthesis and properties of dithioacetals of conformationally constrained α-acyl-β-aminovinyl ketones of the 8-azasteroid
type: item
description: We have studied the reaction of α-acyl-β-aminovinyl of the 8-azasteroid series with ethanedithiol. The occurrence and orientation of the reaction are determined by structural and steric factors. As applied to derivatives of 8-azasteroids of the D-homo series, the reaction is irreversible and consequently the dithioacetal derivatives of this series are easily hydrolysed under acid and base conditions. Desulfurization over Raney nickel of the 17-dithioacetal derivative of 8-azagona-12,17-dione occurs with simultaneous dehydrogenation of the C ring and leads to the 17-deoxo-9,11-dehydro, while desulfurization of the 1-dithioacetal of 8-aza-D-homogona-12,17a-dione leads to the 12-deoxo derivative. By reaction of the 12-dithioacetal of 8-aza-D-homogona-17a-one with hydroxylamine, we obtained the 12-oximino derivative, which is the result of an unusual reaction at the site of the spiro coupling of the dithiolane ring with the 8-azasteroid ring. How to Cite Gulyakevich, O. V.; Mikhal'chuk, A. L.; Akhrem, A. A. Chem. Heterocycl. Compd. 1995, 31, 160. [Khim. Geterotsikl. Soedin. 1995, 187.] For this article in the English edition, see DOI https://doi.org/10.1007/BF01169673
creator: O. B. Гулякевич
creator: А. Л. Mиxальчук
creator: А. А. Ахрем
rights: Copyright (c) 2026 Chemistry of Heterocyclic Compounds
date: 1995-02-25
publication date: 1995-02-25
number: 2
starting page: 187
ending page: 194

4-Hydroxy-2-quinolones. 20. Synthesis and chemical conversions of ehtyl esters of the chloro-substituted quinoline-3-carboxylic acids
type: item
description: Preparative methods for the synthesis of ethyl esters of 2,4-dichloro- and 2-oxo-4-chloroquinoline-3-carboxylic acids were developed. The behavior of the compounds indicated was studied under conditions of alkaline and acidic hydrolysis, in reactions with some nucleophilic reagents, as well as in reductive dehalogenation. Results of the study of the antimicrobial and anti-inflammatory activity of the synthesized compounds are presented. How to Cite Ukrainets, I. V.; Taran, S. G.; Gorokhova, O. V.; Marusenko, N. A.; Kovalenko, S. N.; Turov, A. V.; Filimonova, N. I.; Ivkov, S. M. Chem. Heterocycl. Compd. 1995, 31, 167. [Khim. Geterotsikl. Soedin. 1995, 195.] For this article in the English edition, see DOI https://doi.org/10.1007/BF01169674
creator: И. B. Украинец
creator: C. Г. Таран
creator: O. B. Горохова
creator: Н. А. Марусенко
creator: C. Н. Коваленко
creator: А. B. Туров
creator: H. И. Филимонова
creator: C. М. Ивков
rights: Copyright (c) 2026 Chemistry of Heterocyclic Compounds
date: 1995-02-25
publication date: 1995-02-25
number: 2
starting page: 195
ending page: 203

4-Hydroxy-2-quinolones. 26. Bromination of 3-substituted 2-oxo-4-hydroxyquinolones
type: item
description: The bromination of 3-alkyl- and 3-ethoxycarbonyl-2-oxo-4-hydroxyquinolones by molecular bromine gave 3-bromo-3-R-2,4-dioxoquinolones. Under analogues conditions, 1-R-2,4-dioxo-3H-quinolone-3-carboxylic acids form 1-R-3-bromo-2-oxo-4-hydroxyquinolones. The results of the study of the antimicrobial activity of the compounds synthesized are presented. How to Cite Ukrainets, I. V.; Taran, S. G.; Evtifeva, O. A.; Gorokhova, O. V.; Filimonova, N. I.; Turov, A. V Chem. Heterocycl. Compd. 1995, 31, 176. [Khim. Geterotsikl. Soedin. 1995, 204.] For this article in the English edition, see DOI https://doi.org/10.1007/BF01169675
creator: И. B. Украинец
creator: C. Г. Таран
creator: O. А. Евтифеева
creator: O. B. Гoроховa
creator: Н. И. Филимонова
creator: А. B. Туров
rights: Copyright (c) 2026 Chemistry of Heterocyclic Compounds
date: 1995-02-25
publication date: 1995-02-25
number: 2
starting page: 204
ending page: 207

Investigation of bisheteryl derivatives of piperazine and its analogs. 2. Synthesis and properties of bis(dialkyldithiocarbamoyl-5-nitro-4-pyrimidyl)piperazines
type: item
description: The corresponding 6-dialkyldithiocarbamoyl derivatives are obtained by reacting N,N′bis(2-R-6-chloro-5-nitro-4-pyrimidyl)carbamates. in one example it was shown that these products may be rearranged on heating with the formation of the bis(1,3-dithiolo[4,5-d]pyrimidyl)piperazine system, and in the presence of an alkaline catalyst may be converted by fission of the pyrimidine ring into the highly polarized N,N′-bis(1-amino-2-cyano-2-nitro-1-ethenyl)piperidine. How to Cite Makarov, V. A.; Sedov, A. L.; Nemeryuk, M. P.; Solov'eva, N. P.; Anisimova, O. S.; Safonova, T. S. Chem. Heterocycl. Compd. 1995, 31, 180. [Khim. Geterotsikl. Soedin. 1995, 208.] For this article in the English edition, see DOI https://doi.org/10.1007/BF01169676
creator: B. А. Макаров
creator: А. Л. Седов
creator: М. П. Немерюк
creator: H. П. Соловьева
creator: O. C. Анисимова
creator: Т. С. Сафонова
rights: Copyright (c) 2026 Chemistry of Heterocyclic Compounds
date: 1995-02-25
publication date: 1995-02-25
number: 2
starting page: 208
ending page: 210

Iodocyclization of 2-allythio-4(3H)-pyrimidinones
type: item
description: It has been established that the iodocyclization of 2-allythio-4-(3H)-pyrimidinones occurs at the N(1) nitrogen atom with the formation of 3-iodomethyl-7-oxo-2,3-dihydro-8H-thiazolo[3,2-a]pyrimidinium iodides and triiodides. How to Cite KKhim, D.G., Shmygarev, V.I. Chem. Heterocycl. Compd. 1995, 31, 183. [Khim. Geterotsikl. Soedin. 1995, 211.] For this article in the English edition, see DOI https://doi.org/10.1007/BF01169677
creator: Д. Г. Ким
creator: В. И. Шмыгарев
rights: Copyright (c) 2026 Chemistry of Heterocyclic Compounds
date: 1995-02-25
publication date: 1995-02-25
number: 2
starting page: 211
ending page: 213

Synthesis and properties of derivatives of sym-triazine. 15. Synthesis of amine derivatives of sym-triazine that contain indole groups
type: item
description: By the cyclocondensation of imino esters of acids of the indole series with N-acylguanidines, 2-amino-4,6-disubstituted sym-triazines are obtained that contain indole groups. The reaction of N-(indolyl-3-imidolyl)guanidine with esters of carboxylic acids leads to 2-amino-4-(3-indolyl)-6-substituted sym-triazines. Indolyl-containing N-subsitituted 2,4-diamino-sym-triazines are synthesized by the reaction of imino esters of indole acids with biguanides. Similar products are also formed when 2-amino-4-trichloromethyl-sym-triazines that contain indole substituents react with dimethylamine, morpholine, or furfurylamine. How to Cite Kelarev, V. I.; Koshelev, V. N.; Morozova, G. V.; Karakhanov, R. A.; Remizov, A. S. Chem. Heterocycl. Compd. 1995, 31, 186. [Khim. Geterotsikl. Soedin. 1995, 214.] For this article in the English edition, see DOI https://doi.org/10.1007/BF01169678
creator: B. И. Келарев
creator: В. И. Кошелев
creator: Г. B. Морозова
creator: Р. А. Караханов
creator: А. C. Ремизов
rights: Copyright (c) 2026 Chemistry of Heterocyclic Compounds
date: 1995-02-25
publication date: 1995-02-25
number: 2
starting page: 214
ending page: 223

http://cohc.osi.lv/index.php/hgs/article/view/11096
type: item
title: Synthesis and properties of derivatives of sym-triazine. 16. Synthesis of amine and diamine derivatives of sym-triazine containing sterically hindered phenol groups from 6-alkyl(aryl)thio-2,4-bis(trichloromethyl)-sym-triazine
description: The reaction of 6-alkyl(aryl)thio-2,4-bis(trichloromethyl)-sym-triazines with ammonia and primary and secondary amines is studied. It is shown that, depending on the reaction conditions, the replacement of either one or both of the trichloromethyl groups takes place. 6-Alkyl(aryl)thio-2,4-diamino-sym-triazines containing sterically hindered phenol groups are synthesized. How to Cite Kelarev, V. I.; Koshelev, V. N.; Belov, N. V.; Malova, O. V.; Karakhanov, R. A. Chem. Heterocycl. Compd. 1995, 31, 195. [Khim. Geterotsikl. Soedin. 1995, 224.] For this article in the English edition, see DOI https://doi.org/10.1007/BF01169679
creator: B. И. Келарев
creator: В. Н. Кошелев
creator: Н. B. Белов
creator: О. B. Малова
creator: Р. А. Караханов
rights: Copyright (c) 2026 Chemistry of Heterocyclic Compounds
date: 1995-02-25
publication date: 1995-02-25
number: 2
starting page: 224
ending page: 231

Synthesis of several heteryldehydropeptides by the oxazolone method
type: item
description: (E)-N-Benzolydehydro-3-(3-pyridyl)-alanyltryptophan was synthesized in 89% yield by the reaction of 2-phenyl-4-(3-pyridylidene)-5(4H)-oxazolone with tryptophan. The reaction of 4-[1-(2-furyliden)ethyl]- and 4-(3-pyridyliden)-2-phenyl-5(4H)-oxazolones with alanyltryptophan gives a mixture of the Z and E isomers of the corresponding dehydrotripeptides. Racemization of the alanyl and tryptophan residues was not observed. How to Cite Slavinskaya, V. A.; Sile, D. É.; Katkevich, M.; Korchagova, É. Kh.; Lipsbergs I. U.; Turovskii, I. V.; Lukevits, É. Chem. Heterocycl. Compd. 1995, 31, 202. [Khim. Geterotsikl. Soedin. 1995, 232.] For this article in the English edition, see DOI https://doi.org/10.1007/BF01169680
creator: В. А. Славинская
creator: Д. Э. Силе
creator: М. Каткевич
creator: Э. Х. Корчагова
creator: И. У. Липсбергс
creator: И. В. Туровский
creator: Э. Лукевиц
rights: Copyright (c) 2026 Chemistry of Heterocyclic Compounds
date: 1995-02-25
publication date: 1995-02-25
number: 2
starting page: 232
ending page: 235

New 4(5H)-oxazolonium perchlorate derivatives
type: item
description: The condensation of 2,3-dimethyl-4(5H)-oxazolonium salts with ethyl orthoformate and amides of 5-substituted 2-furancarboxylic acids gives the corresponding products derived by modification of the methyl group at C(2), 2-formylmethylene-4-oxazolidinone and 2-furoylaminoethenyl-4(5H)-oxazolanium perchlorates. How to Cite Kosulina, T. P.; Kozlovskaya, I. N.; Bychenko, N. V.; Morenets, I. P.; Kul'nevich, V. G. Chem. Heterocycl. Compd. 1995, 31, 206. [Khim. Geterotsikl. Soedin. 1995, 236.] For this article in the English edition, see DOI https://doi.org/10.1007/BF01169681
creator: T. П. Косулина
creator: И. H. Козловская
creator: H. B. Быченко
creator: И. П. Моренец
creator: B. Г. Кульневич
rights: Copyright (c) 2026 Chemistry of Heterocyclic Compounds
date: 1995-02-25
publication date: 1995-02-25
number: 2
starting page: 236
ending page: 237

Synthesis and properties of furan derivatives. 4. Synthesis of 2,5-disubstituted 1,3,4-oxadiazoles containing furan fragments
type: item
description: The condensation of hydrochloride sats of iminoesters of furan acids with hydrazides of carboxylic acids gives 2,5-disubstituted 1,3,4-oxadiazoles containing furan fragments. Such compounds are also formed in the condensation of hydrazides of 5-R-furan-2-carboxylic acids with hydrocloride salts of carboxylic acid iminoesters. The reaction of furan acids with hydrazine dihydrochloride in polyphosphoric acid gave symmetrically disubstituted 1,3,4-oxadiazoles containing furan fragments. How to Cite Karakhanov, R. A.; Kelarev, V. I.; Koshelev, V. N.; Morozova, G. V.; Dibi, A. Chem. Heterocycl. Compd. 1995, 31, 208. [Khim. Geterotsikl. Soedin. 1995, 238.] For this article in the English edition, see DOI https://doi.org/10.1007/BF01169682
creator: P. А. Караханов
creator: B. И. Келарев
creator: В. H. Кошелев
creator: Г. B. Морозова
creator: Аммар Диби
rights: Copyright (c) 2026 Chemistry of Heterocyclic Compounds
date: 1995-02-25
publication date: 1995-02-25
number: 2
starting page: 238
ending page: 249

Synthesis of dihydro-10H-pyrano[3′,4′: 5,6]pyrido[3,2:4″,5″]-thieno[3″,2″-d][3,1]oxazines and -pyrimidines
type: item
description: Convenient methods have been developed for synthesizing dihydro-10H-pyrano[3′,4′:5,6]pyrido[3,2:4″,5″]thieno[3″,2″-d][3,1]-oxazines and -pyrimidines. Optimum conditions have been established for the chlorodeoxygenation of condensed thienopyrimidin-4-ones. How to Cite Dabaeva, V. V.; Noravyan, A. S.; Enokyan, B. D. Chem. Heterocycl. Compd. 1995, 31, 219. [Khim. Geterotsikl. Soedin. 1995, 250.] For this article in the English edition, see DOI https://doi.org/10.1007/BF01169683
creator: B. В. Дабаева
creator: А. C. Норавян
creator: Б. Д. Енокян
rights: Copyright (c) 2026 Chemistry of Heterocyclic Compounds
date: 1995-02-25
publication date: 1995-02-25
number: 2
starting page: 250
ending page: 253

Synthesis and stereochemistry of chiral azetidin-2-ones and azetidine-2-thiones. 3. Stereodirected construction of the β-lactam fragment of the thienamycin molecule
type: item
description: It has been shown possible to introduce an α-hydroxyethyl group trans-stereospecifically into position 3′ of 4-methyl-1-(α-methyl-benzyl)azetidin-2-one. The stereochemistry of the asymmetric centers C(3′), C(3), and C(4) of the diastereoisomers of the 3-α-hydroxyethyl derivative obtained in larger amount and of the corresponding three adjacent chiral centers C(8), C(6), and C(5) in thienamycin are the same. How to Cite Romanova, N. N.; Tallo, T. G.; Bundel, Yu. G. Chem. Heterocycl. Compd. 1995, 31, 223. [Khim. Geterotsikl. Soedin. 1995, 254.] For this article in the English edition, see DOI https://doi.org/10.1007/BF01169684
creator: Н. Н. Романова
creator: Т. Г. Талло
creator: Ю. Г. Бyндель
rights: Copyright (c) 2026 Chemistry of Heterocyclic Compounds
date: 1995-02-25
publication date: 1995-02-25
number: 2
starting page: 254
ending page: 257

ESR spectra of electrochemically generated free anion radicals of hetaryl-substituted trichloro-1,4-benzoquinones
type: item
description: The ESR method was used to confirm the formation of free anion radicals in the source of electrochemical reduction of 5-thiazolyl-substituted 1,4-benzoquinones and related compounds, as well as the ability of the unpaired electron to become delocalized over the system of π electrons not only of the benzoquinone nucleus but also of the hetaryl substituent added to it. How to Cite Stradyn', Ya.; Gavars, R.; Baumane, L.; Valters, R. Chem. Heterocycl. Compd. 1995, 31, 227. [Khim. Geterotsikl. Soedin. 1995, 258.] For this article in the English edition, see DOI https://doi.org/10.1007/BF01169685
creator: Я. Страдынь
creator: P. Гаварс
creator: Л. Баумане
creator: P. Валтерс
rights: Copyright (c) 2026 Chemistry of Heterocyclic Compounds
date: 1995-02-25
publication date: 1995-02-25
number: 2
starting page: 258
ending page: 261

http://cohc.osi.lv/index.php/hgs/article/view/11089
type: item
title: Gain in magnetic shielding of the 15N nucleus in a successive series of related 10, 12, and 14 π-electron heterocycles: 2,1,3-bensothiadiazole, 1,3,2,4-benzodithiadiazine, and 1,3,5,2,4-benzotrithiadiazine
description: A significant (≈85 ppm) increase in shielding of the 15N nucleus is observed in the successive series of 10, 12, and 14 π-electron heterocycles: 2,1,3-benzothiadiazole, 1,3,2,4-benzodithiadiazine, and 1,3,5,2,4-benzotrithiadiazine, as compared to the gain from both the full and the π-charge of the nitrogen atom. Possible antiaromaticity of the 12 π-electron dithiadiazine, containing a low-lying activation state, does not appear clearly in the 15N NMR. How to Cite Shakirov, M. M.; Beregovaya, I. V.; Zibarev, A. V. Chem. Heterocycl. Compd. 1995, 31, 231. [Khim. Geterotsikl. Soedin. 1995, 262.] For this article in the English edition, see DOI https://doi.org/10.1007/BF01169686
creator: M. M. Шакиров
creator: И. B. Береговая
creator: А. В. Зибарев
rights: Copyright (c) 2026 Chemistry of Heterocyclic Compounds
date: 1995-02-25
publication date: 1995-02-25
number: 2
starting page: 262
ending page: 265

Synthesis of 11-N-arylaminomethylene derivatives of 8-azasteroies. A new rection of cyclic Schiff's bases
type: item
description: How to Cite Gulyakevich, O. V.; Mikhail'chuk, A. L.; Akhrem, A. A. Chem. Heterocycl. Compd. 1995, 31, 235. [Khim. Geterotsikl. Soedin. 1995, 266.] For this article in the English edition, see DOI https://doi.org/10.1007/BF01169687
creator: O. В. Гулякевич
creator: А. Л. Михальчук
creator: А. А. Ахрем
rights: Copyright (c) 2026 Chemistry of Heterocyclic Compounds
date: 1995-02-25
publication date: 1995-02-25
number: 2
starting page: 266
ending page: 267

Cyclization of 5-diazoimidazole-4-carbonitrile
type: item
description: How to Cite Mokrushin, V. S.; Pospelova, T. A.; Shafran, Yu. M. Chem. Heterocycl. Compd. 1995, 31, 237. [Khim. Geterotsikl. Soedin. 1995, 267.] For this article in the English edition, see DOI https://doi.org/10.1007/BF01169688
creator: В. С. Мoкpyшин
creator: Т. А. Поспелова
creator: Ю. М. Шафран
rights: Copyright (c) 2026 Chemistry of Heterocyclic Compounds
date: 1995-02-25
publication date: 1995-02-25
number: 2
starting page: 267
ending page: 268

4-Methyl-3-cyanopyridin-2(1H)-thione
type: item
description: How to Cite Shelyakin, V. V.; Dyachenko, V. D.; Sharanin, Yu. A. Chem. Heterocycl. Compd. 1995, 31, 239. [Khim. Geterotsikl. Soedin. 1995, 269.] For this article in the English edition, see DOI https://doi.org/10.1007/BF01169689
creator: В. B. Шелякин
creator: В. Д. Дяченкo
creator: Ю. А. Шаранин
rights: Copyright (c) 2026 Chemistry of Heterocyclic Compounds
date: 1995-02-25
publication date: 1995-02-25
number: 2
starting page: 269
ending page: 269

Reaction of amino-imino-1H-isoindole with α-bromoketones
type: item
description: Как ссылаться Gordienko, O. V.; Lyubchuk, T. V.; Balitskii, Yu. V.; Kornilov, M. Yu. Chem. Heterocycl. Compd. 1995, 31, 241. [Химия гетероцикл. соединений 1995, 270.] Статья в английском издании журнала: DOI https://doi.org/10.1007/BF01169690
creator: О. B. Гордиенко
creator: Т. B. Любчук
creator: Ю. B. Балицкий
creator: М. Ю. Корнилов
rights: Copyright (c) 2026 Chemistry of Heterocyclic Compounds
date: 1995-02-25
publication date: 1995-02-25
number: 2
starting page: 270
ending page: 270

Synthesis of 2-oxooxazolo[5,4-b]pyridines and their reactions with amines
type: item
description: How to Cite Gudrinietse, É.; Yure, M.; Pastors, P.; Karklinya, A.; Palitis, É. Chem. Heterocycl. Compd. 1995, 31, 243. [Khim. Geterotsikl. Soedin. 1995, 271.] For this article in the English edition, see DOI https://doi.org/10.1007/BF01169691
creator: Э. Гудриниеце
creator: М. Юре
creator: П. Пасторс
creator: А. Карклиня
creator: Э. Палитис
rights: Copyright (c) 2026 Chemistry of Heterocyclic Compounds
date: 1995-02-25
publication date: 1995-02-25
number: 2
starting page: 271
ending page: 272

1-Methyl-2-alkylbenzimidazole organomagnesium compounds
type: item
description: How to Cite Koshchienko, Yu. V.; Ryabtsova, O. V.; Tertov, B. A. Chem. Heterocycl. Compd. 1995, 31, 245. [Khim. Geterotsikl. Soedin. 1995, 272.] For this article in the English edition, see DOI https://doi.org/10.1007/BF01169692
creator: Ю. В. Кощиенко
creator: О. В. Рябцова
creator: Б. А. Тертов
rights: Copyright (c) 2026 Chemistry of Heterocyclic Compounds
date: 1995-02-25
publication date: 1995-02-25
number: 2
starting page: 272
ending page: 273

Synthesis of N-ethoxycarbonyl-β-aminoketones —key intermediated for the preparation of nitrogen-containing heterocycles
type: item
description: How to Cite Sivova, N. V.; Shutalev, A. D. Chem. Heterocycl. Compd. 1995, 31, 246. [Khim. Geterotsikl. Soedin. 1995, 273.] For this article in the English edition, see DOI https://doi.org/10.1007/BF01169693
creator: H. В. Сивова
creator: А. Д. Шуталев
rights: Copyright (c) 2026 Chemistry of Heterocyclic Compounds
date: 1995-02-25
publication date: 1995-02-25
number: 2
starting page: 273
ending page: 274

Reaction of cyclic sulfites with acetonitrile
type: item
description: How to Cite Kuznetsov, V. V. Chem. Heterocycl. Compd. 1995, 31, 248. [Khim. Geterotsikl. Soedin. 1995, 275.] For this article in the English edition, see DOI https://doi.org/10.1007/BF01169694
creator: В. В. Кузнецов
rights: Copyright (c) 2026 Chemistry of Heterocyclic Compounds
date: 1995-02-25
publication date: 1995-02-25
number: 2
starting page: 275
ending page: 275