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121.
V. A. Zyryanov V. L. Rusinov I. Ya. Postovskii 《Chemistry of Heterocyclic Compounds》1980,16(12):1286-1288
1-(2-Carbethoxyphenyl)-5-methyltetrazole is converted to 5-hydroxytetrazolo-[1,5-]quinoline when it is heated in dimethyl sulfoxide and dimethylformamide with sodium ethoxide. The hydroxy structure of the compound obtained was confirmed by spectral methods.DeceasedTranslated from Khimiya Geterotsiklicheskikh Soedinenii, No. 12, pp. 1690–1692, December, 1980. 相似文献
122.
123.
V. A. Gunyakov S. A. Myslivets V. G. Arkhipkin V. Ya. Zyryanov V. F. Shabanov 《Doklady Physics》2013,58(6):219-223
We investigate experimentally the nonlinear transmission of a photonic crystal with a nematic liquid-crystal defect upon reorientation of the director in a field of cw laser radiation propagating at a certain angle to the sample. At different detunings, we observed the regimes of bistability, differential gain, and optical limiting. The resonance transmission peaks were detuned from the laser radiation wavelength by changing the angle of light incidence onto the sample. The value of nematic nonlinear constant n 2 determined from the experimental data is in good agreement with the theoretical estimate. 相似文献
124.
125.
Vitaly S. Sutormin Mikhail N. Krakhalev Oxana O. Prishchepa Victor Ya. Zyryanov 《Liquid crystals》2018,45(8):1129-1136
Reorientation of cholesteric liquid crystal induced by the electrically controlled ionic modification of surface anchoring within the cell with confinement ratio exceeding 1 has been studied. The change of homeotropic surface anchoring to the planar one on the electrode-anode substrate under the action of DC voltage causes the formation of the modulated hybrid-aligned cholesteric layer in the cell. Optical texture of the liquid crystal layer with such an orientation structure is the linear periodic stripes. Homogeneity of emerging optical texture depending on the confinement ratio as well as on the prehistory of voltage application has been considered. It has been found that the ionic modification of surface anchoring results in total transformation of the diffraction pattern observed after the laser beam passing through the sample. 相似文献
126.
Zyryanov G. V. Rusinov V. L. Chupakhin O. N. Krasnov V. P. Levit G. L. Kodess M. I. Shtukina T. S. 《Russian Chemical Bulletin》2004,53(6):1290-1294
The reaction of 3-phenyl-1,2,4-triazin-5(4H)-one (1) with l-menthol in the presence of aliphatic acid anhydrides results in (6S)- and (6R)-1-acyl-6-(l-menth-3-yl)-1,6-dyhydro-3-phenyl-1,2,4-triazin-5(4H)-ones. The reaction is diastereoselective with predominant formation of (6S)-isomers. The reaction diastereoselectivity increases with enhancement of the steric hindrance in the vicinity of the reaction center of the azine. 相似文献
127.
Savchuk М. I. Kopchuk D. S. Egorov I. N. Khasanov А. F. Rybakova S. S. Zyryanov G. V. Rusinov V. L. Chupakhin О. N. 《Russian Journal of General Chemistry》2021,91(5):779-784
Russian Journal of General Chemistry - 8-Hydroxy(methoxy)-substituted 2-[6-(1-methylindol-3-yl)pyridin-2-yl]quinoline ligands were synthesized by means of combination of SNH reaction between... 相似文献
128.
Krinochkin A. P. Guda M. R. Kopchuk D. S. Shtaitz Ya. K. Starnovskaya E. S. Savchuk M. I. Rybakova S. S. Zyryanov G. V. Chupakhin O. N. 《Russian Journal of Organic Chemistry》2021,57(4):675-677
Russian Journal of Organic Chemistry - Methyl 3-(3,6-diaryl-1,2,4-triazin-5-ylamino)thiophen-2-carboxylates were synthesized in 70–75% yield by solvent-free reaction of methyl... 相似文献
129.
Mohan Challam Challa Balakrishna Avula Sravya Gundala Mallikarjuna Reddy Guda Grigory V. Zyryanov Suresh Reddy Cirandur Bakthavatchala Reddy Nemallapudi 《Journal of heterocyclic chemistry》2019,56(3):818-823
Synthesis of the title compounds 4(a – i) was accomplished through a two‐step process. The synthetic route involves the cyclization of equimolar quantities of 2,2′‐methylene(methyl)bis(4,6‐di‐tert‐butyl‐phenol) ( 1 ) with tris‐(2‐chloro‐ethyl) phosphite ( 2a ), tris‐(2‐bromo‐ethyl) phosphine ( 2b ), and tris‐bromo methyl phosphine ( 2c ) in the presence of sodium hydride in dry tetrahydrofuran at 45–50°C. They were further converted to the corresponding oxides, sulfides, and selenides under N2 atmosphere by reacting them with hydrogen peroxide, sulfur, and selenium, respectively ( 4a – c , 4d – f, and 4g – i ). But the compounds 6a , b were prepared by the direct cyclocondensation of equimolar quantities of 1 with (2‐chloro‐ethyl)‐phosphonic acid dibromomethyl ester ( 5a ) and (2‐chloro‐ethyl)‐phosphonic acid bis(2‐bromo‐ethyl) ester ( 5b ) in the presence of sodium hydride in dry tetrahydrofuran at 45–50°C in moderate yields. All the newly synthesized compounds 4 ( a – i ) and 6 ( a – b ) exhibited moderate in vitro antibacterial and antifungal activities. 相似文献
130.
Kopchuk Dmitry S. Taniya Olga S. Khasanov Albert F. Krinochkin Alexey P. Kovalev Igor S. Pospelova Tatiana A. Zyryanov Grigory V. Rusinov Vladimir L. Chupakhin Oleg N. 《Chemistry of Heterocyclic Compounds》2019,55(6):490-504
Chemistry of Heterocyclic Compounds - This article provides an overview of the available literature data on direct CH functionalization reactions used for introducing alkenyl and alkynyl groups... 相似文献