Zobrazeno 1 - 10 of 26 pro vyhledávání: '"N. I. Traven"'
1
Investigation of the oxidation-reduction transformations of derivatives of dipyrimido-[4,5-b][4′,5′-e][1,4]thiazine
Autor: V. I. Levina, T. S. Safonova, N. I. Traven, E. V. Dekhtyarev, N. B. Grigor'ev, M. P. Nemeryuk
Publikováno v: Chemistry of Heterocyclic Compounds. 33:1215-1218
The oxidation-reduction characteristics of both the free radical and the reduced forms of dipyrimido[4,5-b][4′,5′-e][1,4]thiazine derivatives were studied by polarography. It was found that these compounds can participate in oxidation-reduction r
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f047cd92419f24d705cf4ac580cb7225
https://doi.org/10.1007/bf02290873
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2
Hetero analogs of alloxazines 3. Rearrangements of 6,8-dimethyl-9a-hydroxy-7,9-dioxo-9ah-6,7,8,9-tetrahydrodipyrimido[4,5-b][4?,5?-e][1,4]thiazines
Autor: E. A. Shatukhina, T. G. Arutyunyan, M. P. Nemeryuk, N. I. Traven, N. P. Solov'eva, O. S. Anisimova, Yu. N. Sheinker, T. S. Safonova
Publikováno v: Chemistry of Heterocyclic Compounds. 28:1350-1355
The structures of 6,8-dimethyl-9a-hydroxy-7,9-dioxo-9aH-6,7,8,9-tetrahydrodipyrimido[4,5-b][4′,5′-e][1,4]thiazines were studied by NMR spectroscopy and mass spectrometry. The transformation of these compounds in solution in DMSO was investigated.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1ad720e93c9fe1c3fc046cabb935d770
https://doi.org/10.1007/bf00532092
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3
Hetero analogs of alloxazines. 2. Structure and tautomerism of 6,8-dimethyl-7,9-dioxo-5h-6,7,8,9-tetrahydropyrimido[4,5-b][4?,5?-e][1,4]thiazines
Autor: M. P. Nemeryuk, N. I. Traven, O. S. Anisimova, Yu. N. Sheinker, N. P. Solov'eva, T. S. Safonova, T. G. Arutyunyan, E. A. Shatukhina
Publikováno v: Chemistry of Heterocyclic Compounds. 28:1219-1224
It is demonstrated by 13C NMR spectroscopy that the dipyrimidothiazines that are formed in the reaction of 1,3-dimethyl-5-nitro-6-chlorouracil with 4-R-5-amino-6-mercaptopyrimidines are dipyrimido[4,5-b][4′,5′-e] [1,4]thiazines. The tautomeric tr
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::12fb9ad96a5b3c4a174f5f71c2dc3146
https://doi.org/10.1007/bf00529592
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4
Heteroanalogs of alloxazines
Autor: E. A. Shatukhina, T. G. Arutyunyan, O. S. Anisimova, N. I. Traven, N. P. Solov'eva, M. P. Nemeryuk, Yu. N. Sheinker, T. S. Safonova
Publikováno v: Chemistry of Heterocyclic Compounds. 28:951-955
The properties of derivatives of 6,8-dimethyl-7,9-dioxo-5H-6,7,8,9-tetrahydropyrimido[4,5-b][4,5-e][1,4]thiazines have been investigated. These substances are stable in the crystalline form and are readily oxidized in moist solutions in chloroform or
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::967d4fd8e6aa29ff5a3e6714a0545316
https://doi.org/10.1007/bf00531334
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6
6,7,8,9-Tetrahydrodipyrimido[4,5-b][4?,5?-e][1,4]thiazine derivatives. Synthesis and structure
Autor: Yu. N. Sheinker, O. G. Sokol, V. M. Kazakova, N. P. Solov'eva, O. S. Anisimova, M. P. Nemeryuk, T. G. Arutyunyan, N. I. Traven, E. A. Shatukhina, N. A. Nerseyan, T. S. Safonova, E. M. Peresleni
Publikováno v: Chemistry of Heterocyclic Compounds. 25:214-220
The reaction of 5-amino-6-mercaptopyrimidines with 1,3-dimethyl-5-nitro-6-chlorouiracil in the presence of bases results in derivatives of 6,7,8,9-tetrahydrodipyrimido[4,5-b][4′,5′-e][1,4]-thiazine. If the 5-amino-6-mercaptopyrimdine contains a f
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b57ea96b2520ce50e3d52a41953c2da1
https://doi.org/10.1007/bf00479922
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7
Investigation of the z, e isomerism of N-(5-pyrimidyl)- and N-(5-pyridyl) acetamidines
Autor: T. S. Safonova, N. P. Solov'eva, N. I. Traven, Yu. N. Sheinker, M. P. Nemeryuk, E. M. Peresleni
Publikováno v: Chemistry of Heterocyclic Compounds. 11:985-990
The processes of Z,E isomerization about the C=N bond and retardation of rotation about the C-N bond in N-(5-pyrimidyl)- and N-(5-pyridyl)-acetamidines were investigated on the basis of data on the temperature dependence of the PMR spectra. The effec
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::41536a79e386b26e0f05bd91b8b712b2
https://doi.org/10.1007/bf00470506
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9
Investigation of nitrogen- and sulfur-containing heterocycles. 39. Reactions of 2-mercapto-3-ureido- and 2-mercapto-3-aminopyridines with ?-halo carbonyl compounds. Synthesis of 6-oxo derivatives of pyrido[2,3-b][1,5]thiazepines
Autor: T. S. Safonova, N. I. Traven
Publikováno v: Chemistry of Heterocyclic Compounds. 17:463-468
The reaction of 2-mercapto-3-ureido- and 2-mercapto-3-aminopyridines with β-halo derivatives of carbonyl compounds (ketones, acids, and aldehydes) and with acrylonitrile proceeds not only via the mercapto group but also via the amino group, as a res
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::b9e09a23d6b3e4a2f7ad439e61b0c2e8
https://doi.org/10.1007/bf00505689
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10
Nitrogen-, oxygen-, and sulfur-containing heterocycles. 43. Synthesis and properties of 6-oxo-5H-pyrido[2,3-b][1,4]thiazines
Autor: T. S. Safonova, N. I. Traven
Publikováno v: Chemistry of Heterocyclic Compounds. 21:176-180
It has previously been observed that the carbamide residue in 2-phenacyl-3-ureido- and 2-cyanomethylpyridine is readily cleaved on cyclization to pyridothiazines [1–4]. It was of interest to establish whether a similar process occurs when the carbo
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::2a7ff5c2b2fd6974f6b372d52c05b58a
https://doi.org/10.1007/bf00504204
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