Výsledky vyhledávání - "G. G. Dvoryantseva"

Lactam and acid amide acetals 57. Synthesis, protonation, and acid-base properties of condensed derivatives of 4-oxo-1,4-dihydro-1,8-naphthyridine

Autor: G. G. Dvoryantseva, V. G. Granik, N. N. Proshina, L. V. Ershov, L. T. Guss, L. S. Khabarova

Publikováno v: Chemistry of Heterocyclic Compounds. 26:544-551

A number of 4-oxo-1,4-dihydro-1,8-naphthyridine derivatives that differ with respect to the sizes of the azaand carbocycles were synthesized by the reaction of 3-amino-4-ethoxycarbonyl-5,6-dihydro-7H-pyrindine and 3-amino-4-ethoxycarbonyl-5,6,7,8-tet

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::199a054c1d58b1caac68268b6d4f7dad
https://doi.org/10.1007/bf00487431

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Photochemical reactions of biologically important quinoxaline N-oxides

Autor: G. G. Dvoryantseva, Vladimir I. Polshakov, K. P. Tetenchuk, A. S. Elina

Publikováno v: Pharmaceutical Chemistry Journal. 20:227-235

The authors study the photochemical reactions of quinoxidine, dioxidine, and a number of related derivatives of quinoxaline 1,4-di-N-oxides containing methyl, halomethyl, and carboxamide groups in the pyrazine ring. Thin-layer chromatography, UV spec

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0a8af4b105e670e228306f3fa9084f65
https://doi.org/10.1007/bf00758806

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13C NMR spectra of the bases and conjugate acids of 3- and 5-formyl-,acetyl-, and carbethoxypyrroles

Autor: Marina I. Struchkova, G. G. Dvoryantseva, R. P. Evstigneeva

Publikováno v: Chemistry of Heterocyclic Compounds. 15:394-400

The effect of protonation of the oxygen atom of the carbonyl group and the carbon atom of the pyrrole ring on the 13C chemical shifts in a series of 3- and 5-formyl-, 3-acetyl-, and 3-carbethoxypyrroles was studied. The structures of the conjugate ac

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7d739f38241baf6fc8d8042f29386c71
https://doi.org/10.1007/bf00471772

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Structure of the cationic forms of pyrimido [4,5-b][1,4]thiazines ? A new type of folic acid antagonist

Autor: T. S. Safonova, M. P. Nemeryuk, T. N. Ul'yanova, T. Ya. Filipenko, G. G. Dvoryantseva, Yu. N. Sheinker, Pavel V. Petrovskii, É. I. Fedin

Publikováno v: Chemistry of Heterocyclic Compounds. 15:41-46

The protonation of 4-methoxy-, 4-amino-, and 4-dimethylamino-6-aminopyrimido[4,5-b][1,4]thiazines and N-(4-methoxy-5-pyrimidinyl)acetamidine was studied by 1H and 13C NMR spectroscopy. It is shown that the addition of a proton in the first three comp

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::9bdf5f4b0a7072c417c4bf54193e2880
https://doi.org/10.1007/bf00471196

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Investigation of the pathways of biotransformation of spirobromine

Autor: Vladimir I. Polshakov, Yu. N. Sheinker, Zh. F. Presnova, V. A. Chernov, T. S. Safonova, G. G. Dvoryantseva

Publikováno v: Pharmaceutical Chemistry Journal. 20:519-525

The authors investigate the conversions of spirobromine in aqueous media at 37/sup 0/C and pH values close to physiological. It is a new, original antitumor drug for the treatment of acute leukemia and forms of malignant neoplasms. The authors used P

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::dd43b3031b4b93bfe61cd4038ef0c794
https://doi.org/10.1007/bf00757628

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Investigation of the reaction of 4-methyl-7-azaindoline with acetic and trifluoroacetic acids in methylene chloride by PMR and IR spectroscopy

Autor: L. N. Yakhontov, Yu. N. Sheinker, D. M. Krasnokut-skaya, T. N. Ul'yanova, G. G. Dvoryantseva

Publikováno v: Chemistry of Heterocyclic Compounds. 12:70-76

The relative position of the equilibria of proton transfer via a hydrogen bond and dissociation of the H complexes to give solvated ions was determined on the basis of a study of the dependence of the chemical shifts and the spin-spin coupling consta

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::fdc4059645c50257daf471896f5e1c8b
https://doi.org/10.1007/bf00473917

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