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1.
S. A. Mamedova 《Chemistry of Natural Compounds》1994,30(2):267-268
Institute of Botany, Academy of Sciences of the Republic of Azerbaidzhan, Baku. Translated from Khimiya Prirodnykh Soedinenii,
No. 2, pp. 291–292, March–April, 1994. 相似文献
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The new triterpenoid cycloartane cycloorbigenin C, the structure of which is 23ξ,24ξ-cycloartan-3β,6α,16β,23,24,25-hexaol, was obtained from the aerial part of Astragalus orbiculatus Ledeb. (Leguminosae). The structure of cycloorbigenin C was proved using chemical transformations, IR spectroscopy, electron-impact mass spectrometry, and PMR and 13C NMR spectra interpreted using J-modulation and the 2D NMR spectroscopies: 1H-1H COSY, TOCSY, ROESY, HSQC, and HMBC. 相似文献
5.
I. A. Sukhina R. P. Mamedova M. A. Agzamova M. I. Isaev 《Chemistry of Natural Compounds》2007,43(2):159-161
The two trisdesmoside cycloartane glycosides astragaloside VII and cyclotrisectoside were isolated from Astragalus dissectus (Leguminosae) and identified. The latter was 20R,25-epoxy-24S-cycloartan-3β,6α,16β,24-tetraol 3-O-β-D-xylopyranoside-6,24-di-O-β-D-glucopyranoside and was a new natural compound.
Presented at the Sixth International Symposium on the Chemistry of Natural Compounds (SCNC, Turkey, Ankara, 28–29 June 2005).
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Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 132–134, March–April, 2007. 相似文献
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D. B. Tagiev P. S. Mamedova F. A. Abdullaeva M. K. Munshieva A. A. Turabova T. G. Takhirov 《Russian Chemical Bulletin》1992,41(11):2113-2115
The catalytic activity of Ni(II) bis-(5-thiopyrazol-4-aldiminates) was found to be related to the stereochemical flexibility of these compounds in the dimerization of propylene. The propylene conversion decreases with decreasing stereochemical flexibility of the complexes resulting from an increase in the bulk of the substituent at the coordinated nitrogen atom of the NiN2S2 chelate ring.Institute of Inorganic and Physical Chemistry, Academy of Sciences of Azerbaidjan, 370143 Baku. Translated fromIzvestiya Akademii Nauk, Seriya Khimicheskaya, No. 11, pp. 2667–2670, November, 1992. 相似文献
7.
S. G. Mamedova N. Sh. Rasulov Z. M. Rzaev 《Journal of polymer science. Part A, Polymer chemistry》1987,25(2):711-717
Some regularities of radical alternating copolymerization of maleic anhydride with allyl chloroacetate are studied. The formation of donor–acceptor complexes between comonomers with complexing constant Kc = 0.052 L/mol is found using 1H NMR spectroscopy. The kinetic parameters for this copolymerization reaction are found and the quantitative contribution of monomer complexes to chain-growth radical reactions is calculated. It is shown that either a “free-monomer” mechanism (dilute solutions) or a “mixed” mechanism (concentrated solutions) prevails for chain growth during radical copolymerization depending on total monomer concentration. It is found that inhibition of degradative chain transfer in the course of the reaction studied takes place owing to the presence of α-chlorine atom in the allyl chloracetate molecule and formation of charge transfer complex. 相似文献
8.
A. T. Shakhtakhtinskaya Z. M. Mamedova Sh. F. Mutallibova S. Z. Alieva R. G. Mardzhanova 《Reaction Kinetics and Catalysis Letters》1989,39(1):137-140
Acidity of catalyst surfaces of different nature such as -Al2O3, natural zeolite-clinoptilolite, and synthetic zeolite zeokar by adsorption of ammonia over a wide temperature range has been studied. Ammonia is adsorbed on the catalysts with different strengths, as evidenced by the presence of different types of acid sites.
(-Al2O3, - , () . , , .相似文献
9.
The new triterpene glycoside cycloorbicoside C was isolated from the aerial parts of Astragalus orbiculatus Ledeb. (Leguminosae) and was identified as (23R,24S)-16,23;16,24-diepoxycycloartan-3,25-diol 3-O--D-xylopyranoside 25-O--D-glucopyranoside. 相似文献