Zobrazeno 1 - 10
of 36
pro vyhledávání: '"E. G. Kovalev"'
Publikováno v:
ChemInform. 22
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::83abe5f9040d177f9e9f6a37504a0490
https://doi.org/10.1002/chin.199128165
https://doi.org/10.1002/chin.199128165
Publikováno v:
ChemInform. 23
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::274575f9458ce5b6eeebdf9e34c1e4cb
https://doi.org/10.1002/chin.199240194
https://doi.org/10.1002/chin.199240194
Autor:
G. G. Alexandrov, E. O. Sidorov, A. I. Chernyshev, G. L. Rusinov, E. G. Kovalev, V. A. Anufriev
Publikováno v:
ChemInform. 24
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e7b9ee4faff18d6726cfa9f4b93143c6
https://doi.org/10.1002/chin.199337239
https://doi.org/10.1002/chin.199337239
Publikováno v:
Chemistry of Heterocyclic Compounds. 26:1038-1043
A new method of spiro-ring formation by the reaction of s-tetrazines with anhydro bases was described. The prototropic transitions were detected in the pyridazine fragments of the resulting spirocyclic compounds. The heterocycles of the anhydro bases
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8572daa25f31fccaf2232fa3fa4bba2d
https://doi.org/10.1007/bf00472489
https://doi.org/10.1007/bf00472489
Publikováno v:
Chemistry of Heterocyclic Compounds. 26:1408-1408
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6b99583fcedec2f7f2f76d2626b50382
https://doi.org/10.1007/bf00473976
https://doi.org/10.1007/bf00473976
Publikováno v:
Chemistry of Heterocyclic Compounds. 11:304-307
A thione-thiol structure was established for 2-mercapto-5-thiono[4,2,1]triazolino[3,4-b] [1,3,4]thiadiazole in accordance with calculations of the π-bonding and solvation energies by the Pariser-Parr-Pople method and also on the basis of a study of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::9d11fba50debf15b08ab9ad0dc6a2deb
https://doi.org/10.1007/bf00470075
https://doi.org/10.1007/bf00470075
Publikováno v:
Chemistry of Heterocyclic Compounds. 17:1063-1076
The available data on the reaction of sym-tetrazines with various unsaturated compounds from 1958 to 1980 are systematized. The reaction of sym-tetrazines with alkenes, alkadienes, alkynes, and unsaturated carbocycles and heterocycles are presented.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e095623f50a715cbc51ed040afec8e05
https://doi.org/10.1007/bf00506453
https://doi.org/10.1007/bf00506453
Autor:
Oleg N. Chupakhin, I. M. Sosonkin, G. L. Kalb, I. Ya. Postovskii, V. N. Charushin, E. G. Kovalev
Publikováno v:
Chemistry of Heterocyclic Compounds. 13:562-566
A satisfactory correlation between the polarographic reduction potentials and the calculated energies of the lower vacant molecular orbitals was found for a number of N-methylazinium cations. The result of the aza effect and the benzoannelation effec
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c7047556f7a7b4880d3cc203012c4a03
https://doi.org/10.1007/bf00473208
https://doi.org/10.1007/bf00473208
Autor:
G. N. Lipunova, L. L. Popova, N. P. Bednyagina, A. I. Yalandina, E. G. Kovalev, L. G. Egorova
Publikováno v:
Chemistry of Heterocyclic Compounds. 21:684-688
Benzimidazolyl formazans were titrated spectrophotometrically and their base constants were determined. On the basis of quantum mechanical calculations of electron spectra a hypothesis concerning the chelate structure of the unsymmetrical benzimidazo
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::847c47c53b34c404fb70eeef1f893306
https://doi.org/10.1007/bf00515073
https://doi.org/10.1007/bf00515073
Autor:
I. Ya. Postovskii, E. G. Kovalev
Publikováno v:
Chemistry of Heterocyclic Compounds. 6:1064-1069
The cyanoethylation reactions of 1-phenyl-1,2,4-triazoline-3-thione (I) and of 1-phenyl-1,2,4,-triazoline-5-thione (II) have been studied. The cyanoethylation of I forms only S-cyanoethyl derivates,and the cyanoethylation of II only N-cyanoethyl deri
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::716c7221bcdaf63f43abc91cba9bb21f
https://doi.org/10.1007/bf00480652
https://doi.org/10.1007/bf00480652