排序方式: 共有48条查询结果,搜索用时 31 毫秒
1.
G. A. Gazieva A. N. Kravchenko Yu. A. Strelenko O. V. Lebedev R. G. Gaziev V. M. Zhulin 《Chemistry of Heterocyclic Compounds》2003,39(6):784-789
Acid hydrolysis and acetylation of 6,8-dialkyl-3-thia-2,4,6,8-tetraazabicyclo[3,3,0]octan-7-one 3,3-dioxides have been studied. 6,8-Dialkyl-3-thia-2,4,6,8-tetraazabicyclo[3,3,0]octan-7-one 3,3-dioxides disproportionate to 4,4'-sulfonyldiiminobis(1,3-dialkylimidazolidin-2-ones) and sulfamide when treated with acid at pH 1 or with acetyl chloride. The kinetics of the disproportionation have been studied. 相似文献
2.
A. N. Kravchenko A. S. Sigachev E. Yu. Maksareva G. A. Gazieva N. S. Trunova B. V. Lozhkin T. S. Pivina M. M. Il’in K. A. Lyssenko Yu. V. Nelyubina V. A. Davankov O. V. Lebedev N. N. Makhova V. A. Tartakovsky 《Russian Chemical Bulletin》2005,54(3):691-704
Two general procedures were developed for the synthesis of chiral N-mono-, N, N′-di-, N, N′ N″-tri-, and N, N′, N″, N′″-tetraalkylglycolurils based on the reactions of 4,5-dihydroxy-imidazolidin-2-ones or glyoxal with one or two moles of alkylureas, respectively, by acid catalysis. The reactions of N-monoalkyl- and N, N′-dialkylureas with glyoxal proceed regioselectively. The mechanism of these reactions was suggested and partly confirmed by quantum-chemical calculations and experimental data. The enantiomeric separation of some chiral glycolurils by chiral-phase HPLC was carried out for the first time.__________Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 3, pp. 680–692, March, 2005. 相似文献
3.
Galina A. Gazieva Yurii B. Vikharev Lada V. Anikina Tatyana B. Karpova Angelina N. Kravchenko Evgenii A. Permyakov Igor V. Svitanko 《Mendeleev Communications》2013,23(4):202-203
Target synthesis of substituted thioglycolurils possessing sedative activity predicted by preliminary 3D-QSAR simulation of bioactive structures has been carried out. 相似文献
4.
Yu. V. Nelyubina G. A. Gazieva V. V. Baranov P. A. Belyakov A. O. Chizhov K. A. Lyssenko A. N. Kravchenko 《Russian Chemical Bulletin》2009,58(7):1353-1360
1,3-H2-, 1,3-Me2-, and 1,3-Et2-4,5-Dihydroxyimidazolidine-2-thiones were synthesized and their structural peculiarities were studied. A comparative analysis
of dihydroxyimidazolidine-2-thione and its carbonyl analog performed in the framework of detailed investigation of the electron
density distribution in the corresponding crystals revealed the reason for different number and geometric parameters of the
hydrogen bonds formed by the (thio)carbonyl groups in the crystals. 相似文献
5.
6.
A. N. Kravchenko G. A. Gazieva N. G. Kolotyrkina N. N. Makhova 《Russian Chemical Bulletin》2008,57(8):1760-1764
α-Ureidoalkylation of 1,3- and 1,1-dimethylureas with 2-(hydroxymethyl)-, 2,6- and 2,8-di(hydroxymethyl)-, and 2,4,6,8-tetra(hydroxymethyl)glycolurils
gave novel bi-, tri-, tetra-, and pentacyclic fused systems combining the glycoluril and urea fragments. 相似文献
7.
G. A. Gazieva T. V. Nechaeva N. N. Kostikova N. V. Sigay S. A. Serkov S. V. Popkov 《Russian Chemical Bulletin》2018,67(6):1059-1064
A series of 1,3-disubstituted 4-benzylideneamino-5-thioxohexahydroimidazo[4,5-d]imidazol-2(1H)-ones (thioglycolurils) was synthesized via the reaction of 5,7-disubstituted 3-thioxoperhydroimidazo[4,5-e]-1,2,4-triazin-6-ones with hydroxy-, alkoxy-, and fluorocontaining benzaldehyde derivatives. An alkylation of the obtained thioglycolurils with methyl iodide or 4-bromobenzyl bromide provided the corresponding 6-benzylideneamino-5-alkylsulfanyl-3,3a,6,6a-tetrahydroimidazo[4,5-d]imidazol-2(1H)-ones. The fungicidal activity of some synthesized compounds against pathogens causing diseases of agricultural crops was studied. 相似文献
8.
G. A. Gazieva A. N. Kravchenko K. A. Lyssenko R. G. Gaziev O. V. Lebedev N. N. Makhova 《Russian Chemical Bulletin》2008,57(8):1744-1753
The reactions of sulfamides with 4,5-dihydroxyimidazolidin-2-ones were studied at ambient and high pressure. The previously
unknown derivatives of 5(3H)-oxotetrahydro-1H-imidazo-[4,5-c][1,2,5]thiadiazole 2,2-dioxide, viz., sulfo analogs of tetrahydroimidazo[4,5-d]imidazole-2,5-(1H,3H) diones (glycolurils), were synthesized. The structures of some of these compounds were established by X-ray diffraction.
The high-pressure reactions performed under conditions of solvent phase transitions afforded also N-(1,3-diethyl-5-hydroxy-2-oxoimidazolidin-4-yl)-N,N′-dialkylsulfamides. Among these compounds, a new conglomerate was found.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 8, pp. 1711–1719, May, 2008. 相似文献
9.
G. A. Gazieva K. A. Lysenko A. N. Kravchenko O. V. Lebedev 《Russian Journal of Organic Chemistry》2007,43(11):1715-1718
Condensation of N,N′-dimethylsulfamide with glyoxal gave 2,4,6,8-tetramethyl-3,7-dithia-2,4,6,8-tetraazabicyclo[3.3.0]octane 3,3,7,7-tetraoxide, a sulfur-containing analog of 2,4,6,8-tetramethyl-2,4,6,8-tetraazabicyclo[3.3.0]octane-3,7-dione (Mebicar). The product structure was studied by X-ray analysis. 相似文献
10.
Andrey S. Sigachev Angelina N. Kravchenko Galina A. Gazieva Pavel A. Belyakov Natal'Ya G. Kolotyrkina Oleg V. Lebedev Nina N. Makhova Konstantin A. Lyssenko 《Journal of heterocyclic chemistry》2006,43(5):1295-1302
The first representatives of 3,3′‐bi(2,4‐dioxa‐6,8‐diazabicyclo[3.3.0]octan‐7‐ones) have been synthesized by a reaction of glyoxal as form of 2,2′‐bi(4,5‐dihydroxy‐1,3‐dioxalane) with N,N′‐dialkylureas. Their structures have been supported by X‐ray analysis. 1,3‐Dialkylimidazolidine‐2,4‐diones (hydantoins) have been isolated as by‐products and their formation mechanism has been experimentally confirmed. 相似文献