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11.
S. K. Usmanova V. A. Tel'nov M. S. Yunusov N. D. Abdullaev A. I. Shreter G. B. Filippova 《Chemistry of Natural Compounds》1987,23(6):734-737
The structure of a new alkaloid sepaconitine isolated from the epigeal part ofAconitum septentrionale has been established on the basis of spectral characteristics. 相似文献
12.
Sheiman B. M. Yuzefovich L. Yu. Denisova L. Ya. Filippova T. M. Mairanovskii V. G. Berezovakii V. M. 《Chemistry of Heterocyclic Compounds》1977,13(5):511-515
The constants and thermodynamic parameters of the ring-chain tautomeric equilibrium of p-substituted (benzene ring) 2,3,3-trimethyl-1-aryl-2-hydroxy-5-pyrrolidones in aqueous pyridine solution were determined by PMR spectroscopy. Conversion of the ring tautomer to the open form is accompanied by an increase in the enthalpy and entropy. The AH value decreases by a factor of 2.8 kcal/mole on passing from electron-donor substituents to electron-acceptor substituants, whereas the AS value remains approximately constant and decreases by 2–4 eu only for strong electron acceptors (COOCH3, CN, and NO2). The correlation between the free energies and the a substituent constants in the benzene ring is discussed.See [1] for communication XII.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 5, pp. 634–638, May, 1977. 相似文献
13.
A. S. Balueva A. S. Dokuchaev S. R. Prokhorova A. P. Filippova G. N. Nikonov 《Russian Chemical Bulletin》1993,42(8):1381-1384
X-Ray study of the (3,5-diallylisocyanuratomethyl)bis(chloromethyl)phosphine oxide showed that the phosphorylmethyl group is bonded to the nitrogen atom of the cycle. Reaction of the tris(chloromethyl)phosphine sulfide with sodium diallylisocyanurate gave (3,5-diallylisocyanuratomethyl)bis(chloromethyl)phosphine sulfide, and treatment of the tris(3,5-diallylisocyanuratomethyl)phosphine oxide with phosphorus pentasulfide gave a tris(3,5-diallylisocyanuratomethyl)bis(chloromethyl)phosphine sulfide.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 8, pp. 1446–1448, August, 1993. 相似文献
14.
S. D. Mikhno T. M. Filippova N. S. Kulachkina I. G. Suchkova V. M. Berezovskii 《Chemistry of Heterocyclic Compounds》1976,12(4):386-391
dl-cis- and dl-trans-6-(4-Carboxybutyl)-2-oxo-cis-hexahydrothieno[3,4-d]oxazoles were synthesized by the action of phosgene on r-4-amino-c-3-hydroxy-c(or, respectively, )-2-(4-carboxybutyl)thiophan hydrohalides. It is shown that the acid hydrolysis of r-4-benzamido-t-3-hydroxy-c(or t)-2-(4-methoxycarbonylbutyl)thiophans is accompanied by inversion to give r-4-amino-c-3-hydroxy-c(or t)-2-(4-alkoxycarbonylbutyl)thiophans.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 4, pp. 459–465, April, 1976. 相似文献
15.
Summary The ways in which carbon dioxide is formed in the oxidation of formaldehyde at 451 were Investigated. It was shown that not more than 3–5% of the CO2 formed can arise by the oxidation of CO. The bulk (95–91%) of the CO2 is formed directly from formaldehyde. 相似文献
16.
The polarimetric bidirectional reflectance distribution function is modeled for active polarimeters. The applicability boundaries of the model are determined based on the comparison of the simulated and experimental data. 相似文献
17.
Filippova E. O. Tokranov A. A. Shafigulin R. V. Bulanova A. V. 《Russian Journal of Applied Chemistry》2020,93(5):741-747
Russian Journal of Applied Chemistry - The work studied the hydrogenation of benzene and its derivatives on the mesoporous silica gel synthesized by the template method, doped with dysprosium and... 相似文献
18.
I. G. Filippova Yu. A. Simonov M. Gdanets V. Stavila 《Journal of Structural Chemistry》2005,46(6):1095-1098
The structure of tris(1,10-phenanthroline)iron(II) dinitrate dihydrate [Fe(phen)3](NO3)2·2H2O was established by X-ray diffraction analysis. The role of hydrogen bonds in crystal packing is discussed. 相似文献
19.
L. M. Filippova 《Journal of Applied Mathematics and Mechanics》1978,42(6):1183-1188
A half-space of an incompressible neo — Hookean [1,2] material subjected to a homogeneous bi-axial tension or compression along its boundary, is considered. A small deformation caused by the action of a smooth rigid stamp on the boundary of the half-space is superimposed on the initial finite deformation. An integral equation is obtained for the contact pressure. A solution of this equation is obtained for an inclined elliptic stamp with a flat base, and for an elliptic stamp with a curved base, for the cases when the extension coefficients in two directions are either identical, or differ little from each other. The influence of the inital loading on the distribution of the contact pressure, the displacement of the stamp and the form of the contact zone, is analysed. 相似文献
20.
N. G. Grigor’eva N. A. Filippova A. R. Gataulin S. V. Bubennov M. R. Agliullin B. I. Kutepov Nama Narender 《Russian Chemical Bulletin》2017,66(11):2115-2121
Physicochemical characteristics of microporous zeolites of various structural type (FAU, BEA, MTW), micro-meso-macroporous zeolite (H-Ymmm), and mesoporous aluminosilicate (ASM) were studied. Their catalytic activity in the reaction of aniline with acetone was examined. It was found that 2,2,4-trimethyl-1,2-dihydroquinoline was the main reaction product on the catalysts H-Ymmm and ASM (selectivity up to 68% at 100% conversion of aniline), while the reaction on zeolites with microporous structure mainly gave N-phenyl-2-propanimine (selectivity up to 91%). 相似文献