排序方式: 共有54条查询结果,搜索用时 15 毫秒
31.
Vladimir F. Mironov Aidar T. Gubaidullin Gulnara A. Ivkova Igor A. Litvinov Boris I. Buzykin Liliya M. Burnaeva 《Phosphorus, sulfur, and silicon and the related elements》2013,188(1)
Abstract [3+2]-Cycloaddition of N,N-dimethylhydrazone benzaldehyde (I) to 2-RFO-4-oxo-5,6-benzo-l,3,2-dioxaphosphorinanes (II) yields the new heterocycle - 2-RFO-4-Me2N-2,5-dioxo-3-phenyl-6,7-benzo- 1,4,2-dioxaphosphepine (III) [RF = C6F5, CH(CF3)2) with high stereoselectivity (above 94%). The reaction is likely to involve the initial interaction of nitrogen as a nucleophile with wbonyl carbon as an electrophile. The hydrolysis of (III) leads to phosphonic acid (IV) (ORF = OH). 相似文献
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Alla Mirgorodskaya Rushana Kushnazarova Rais Pavlov Farida Valeeva Oksana Lenina Kseniya Bushmeleva Dmitry Kuryashov Alexandra Vyshtakalyuk Gulnara Gaynanova Konstantin Petrov Lucia Zakharova 《Molecules (Basel, Switzerland)》2022,27(19)
Abietic acid, a naturally occurring fir resin compound, that exhibits anti-inflammatory and wound-healing properties, was formulated into biocompatible emulgels based on stable microemulsions with the addition of a carbamate-containing surfactant and Carbopol® 940 gel. Various microemulsion and emulgel formulations were tested for antioxidant and wound-healing properties. The chemiluminescence method has shown that all compositions containing abietic acid have a high antioxidant activity. Using Strat-M® skin-modelling membrane, it was found out that emulgels significantly prolong the release of abietic acid. On Wistar rats, it was shown that microemulsions and emulgels containing 0.5% wt. of abietic acid promote the rapid healing of an incised wound and twofold tissue reinforcement compared to the untreated group, as documented by tensiometric wound suture-rupture assay. The high healing-efficiency is associated with a combination of antibacterial activity of the formulation components and the anti-inflammatory action of abietic acid. 相似文献
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Vladimir Mironov Gulnara Ivkova Liliya Abdrakhmanova Liliya Burnaeva Kristina Kuzmina 《Phosphorus, sulfur, and silicon and the related elements》2013,188(1-3):162-163
Abstract 2-(5-Methyl-2-phenyl-2Н-1,2,3-diazaphosphol-4-yl)-4H-benzo[d]-1,3,2-dioxaphosphorin-4-one 1 readily reacts with hexafluoroacetone, mesoxalic acid diethyl ester, trifluoropyruvic acid ethyl ester and chloral to give 2-(5-methyl-2-phenyl-2H-1,2,3-dizaphosphole-4-yl)-derivatives of 1,3,2- and 1,4,2-dioxaphosphepines. 相似文献
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Vladimir F. Mironov Gulnara A. Ivkova Liliya M. Abdrakhmanova Rashid Z. Musin Ekaterina V. Mironova Dmitry B. Krivolapov 《Phosphorus, sulfur, and silicon and the related elements》2018,193(1):53-62
The interaction of 2-(5-methyl-2-phenyl-2H-1,2,3-diazaphosphol-4-yl)-4H-benzo[e]-1,3,2-dioxaphosphinin-4-one with mesoxalic and trifluoropyruvic acids ethyl and diethyl esters, hexafluoroacetone and chloral proceeds with an exclusive participation of P(III) atom and allows to obtain 2-(5-methyl-2-phenyl-2H-1,2,3-diazaphosphol-4-yl)-derivatives of 1,4,2- and 1,3,2-dioxaphosphepines as well as dichlorovinylphosphonate, being the product of Perkow reaction in the case of chloral. 相似文献
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Vera A. Alferova Roman A. Novikov Olga P. Bychkova Eugene A. Rogozhin Maxim V. Shuvalov Igor A. Prokhorenko Vera S. Sadykova Alexander B. Kulko Lyubov G. Dezhenkova Elena A. Stepashkina Mikhail A. Efremov Olga N. Sineva Gulnara Kh. Kudryakova Aleksander S. Peregudov Pavel N. Solyev Yaroslav V. Tkachev Galina B. Fedorova Larisa P. Terekhova Vladimir A. Korshun 《Tetrahedron》2018,74(52):7442-7449
Two new natural compounds, astolides A,B, were isolated from Streptomyces hygroscopicus collected from the alkaline soil obtained from Saratov region, Russia. The structures were elucidated by interpretation of UV spectroscopic, MS, 1D and 2D NMR data. The relative configurations were determined by analysis of NOESY/ROESY spectra and coupling constants. The isolated compounds were evaluated for their inhibitory activity against bacteria, fungi and yeasts and showed pronounced antifungal activity. Both compounds are noticeably cytotoxic, being active against doxorubicin-resistant human leukemia cell line. 相似文献
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Gulnara G. Iskhakova Vladimir D. Kiselev Rudi van Eldik Achim Zahl Mehdi S. Shihab Alexander I. Konovalov 《Journal of Physical Organic Chemistry》2011,24(5):360-365
Solvent, salt and high pressure effects on the rate and equilibrium constants for the formation of tri‐n‐butylphosphoniumdithiocarboxylate at 298.2 K are reported. This equilibrium is shifted to the phosphobetaine in polar solvents, salt solutions and under high external pressure. The reaction volume changes dramatically on going from less polar diethyl ether (?69 cm3 mol?1) and tetrahydrofurane (THF) (?66 cm3 mol?1), to more polar acetonitrile (?39 cm3 mol?1) and acetone (?38 cm3 mol?1). Copyright © 2010 John Wiley & Sons, Ltd. 相似文献