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V. D. Sviridov N. D. Chkanikov M. V. Galakhov A. F. Kolomiets A. V. Fokin 《Russian Chemical Bulletin》1990,39(4):853-855
Methyl trifluoropyruvate (II) reacts with phenylhydrazine andp-nitrophenylhydrazine to give the corresponding phenylhydrazones (III) and (IV). The reaction of phenylhydrazine with hexafluoroacetone (I) at 20°C leads to the product of the C2-hydroxyalkylation of the aromatic ring (V). The hydroxyalkylation of hydrazobenzene under the same conditions is complicated by a benzidine rearrangement.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 4, pp. 948–950, April, 1990. 相似文献
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N. K. Kochetkov A. F. Sviridov D. V. Yashunskii M. S. Ermolenko V. S. Borodkin 《Russian Chemical Bulletin》1986,35(2):408-413
Conclusions Two methods for the synthesis of C-methyldesoxy-sugars were proposed by desoxygenation of tertiary alcohol xanthogenates and hydrozirconation of exomethylene derivatives of carbohydrates.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No, 2, pp. 441–445, February, 1986. 相似文献
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o-Nitrophenol derivatives have been isolated from the culture liquid of the deuteromycetePyricularia oryzae Cav.: 4-hydroxy-3-nitrophenylacetic acid, 4-hydroxy-3-nitrobenzyl alcohol, 1- and 2-(4-hydroxy-3-nitrophenyl(ethanols, N-(4-hydroxy-3-nitrophenylethyl)acetamide, and pyriculamide. This is the first time that any of these compounds has been isolated from natural sources. The o-nitrophenols obtained possess moderate growth-inhibiting activity in relation to rice shoots.All-Union Scientific-Research Institute of Phytopathology, Moscow. Translated from Khimiya Prirodnykh Soedinenii, No. 6, pp. 811–818, November–December, 1990. 相似文献
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N. D. Chkanikov V. D. Sviridov A. E. Zelenin M. V. Galakhov A. F. Kolomiets A. V. Fokin 《Russian Chemical Bulletin》1990,39(2):323-328
C-Hydroxyalkylation of primary arylamines by highly electrophilic polyfluorocarbonyl compounds results from the direct reaction of the initial reagents and is competitively inhibited by equilibrium N-hydroxyalkylation. The presence of steric hindrances to the formation of N-hydroxyalkylation products and an increase in the ring C-nucleophilicity facilitate the C-hydroxyalkylation reaction.Deceased.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 2, pp. 383–389, February, 1990. 相似文献
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An analysis of the kinetics of the thermal modification of biotissues by speckle correlometry method
D. A. Zimnyakov A. P. Sviridov L. V. Kuznetsova S. A. Baranov N. Yu. Ignat’eva V. V. Lunin 《Russian Journal of Physical Chemistry A, Focus on Chemistry》2007,81(4):626-631
The statistical characteristics of the dynamic speckle fields associated with the scattering of coherent emission on a cartilaginous tissue during its thermal modification by laser irradiation were studied. A method for determining the energy of activation of the thermally induced processes of structural modification of scattering sites was suggested; the method is based on an analysis of the scattered light flashing index. For cartilaginous tissue, the activation energy was estimated as ≈63 kJ/mol, a value that may characterize conformational transitions in the subsystem of proteoglycan aggregates. 相似文献
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