全文获取类型
收费全文 | 114篇 |
免费 | 0篇 |
国内免费 | 1篇 |
专业分类
化学 | 109篇 |
力学 | 1篇 |
数学 | 2篇 |
物理学 | 3篇 |
出版年
2022年 | 1篇 |
2021年 | 1篇 |
2020年 | 1篇 |
2019年 | 1篇 |
2018年 | 3篇 |
2017年 | 4篇 |
2016年 | 3篇 |
2015年 | 5篇 |
2013年 | 7篇 |
2012年 | 5篇 |
2011年 | 5篇 |
2010年 | 8篇 |
2009年 | 9篇 |
2008年 | 6篇 |
2007年 | 6篇 |
2006年 | 3篇 |
2005年 | 7篇 |
2004年 | 1篇 |
2003年 | 2篇 |
2002年 | 2篇 |
2001年 | 7篇 |
2000年 | 1篇 |
1999年 | 2篇 |
1998年 | 1篇 |
1997年 | 1篇 |
1994年 | 1篇 |
1993年 | 2篇 |
1992年 | 1篇 |
1991年 | 2篇 |
1990年 | 2篇 |
1989年 | 2篇 |
1988年 | 3篇 |
1987年 | 1篇 |
1985年 | 3篇 |
1984年 | 2篇 |
1983年 | 1篇 |
1982年 | 1篇 |
1981年 | 1篇 |
1979年 | 1篇 |
排序方式: 共有115条查询结果,搜索用时 843 毫秒
1.
E. A. Yatsynich D. V. Petrov F. A. Valeev V. A. Dokichev 《Chemistry of Natural Compounds》2003,39(4):337-339
The 1,3-dipolar cycloaddition of diazomethane to levoglucosenone was found to occur regio- and stereoselectively to form optically active 9,11-dioxa-4,5-diazatricyclo[6.2.1.02,6]undec-4-en-7-one. Levoglucosenone was found to react with methyldiazoacetate to give the 2:1 adduct. 相似文献
2.
Gafarova Yu. T. Dekhtyar" E. F. Dekhtyar" T. F. Fatykhov A. A. Spirikhin L. V. Vostrikova O. S. Zlotskii S. S. Dokichev V. A. 《Russian Chemical Bulletin》2003,52(4):1003-1008
Under mild conditions, trialkylalanes (Et3Al and Bui
3Al) in chlorine-containing solvents (CH2Cl2 or ClCH2CH2Cl) react with cyclic acetals and orthoformates to form glycol monoethers and dialkylacetals, respectively, in high yields. The 1H NMR spectroscopic data demonstrate that CH2Cl2 or ClCH2CH2Cl interacts with Bui
3Al. 相似文献
3.
Conclusions The linear codimerization of 2-cyclopropyl-1,3-butadiene with methyl acrylate gave a mixture of methyl esters of 5-cyclopropyl-2Z,5Z- and 2E,5Z-heptadienoic acids.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 10, pp. 2364–2366, October, 1984. 相似文献
4.
D. V. Shishkin A. R. Shaimuratova A. N. Lobov N. Z. Baibulatova L. V. Spirikhin M. S. Yunusov N. S. Makara N. Zh. Baschenko V. A. Dokichev 《Chemistry of Natural Compounds》2007,43(2):190-196
Derivatives of N-(2-hydroxyethyl)cytisine, N-(2-hydroxypropyl)-, N-(2-hydroxy-2-(1-adamantyl)ethyl)-, and N-(2-hydroxy-2-phenylethyl)cytisine, were synthesized by reduction of N-(2-oxopropyl)-, N-(2-oxo-2-(1-adamantyl)ethyl)-and N-(2-oxo-2-phenylethyl)cytisine with metal hydrides. The antiarrhythmic and analgesic activities of the prepared compounds
were investigated.
__________
Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 157–162, March–April, 2007. 相似文献
5.
D. V. Shishkin E. R. Mukhamed’yarova N. Z. Baibulatova V. A. Dokichev Yu. V. Tomilov 《Chemistry of Natural Compounds》2007,43(3):293-297
Diastereomers of N-(2-(1-adamantyl)-2-hydroxyethyl)cytisine were synthesized by reduction of N-(2-(1-adamantyl)-2-oxoethyl)cytisine with NaBH4. Their structures were established using x-ray structure analysis.
__________
Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 244–247, May–June, 2007. 相似文献
6.
U. M. Dzhemilev R. I. Khusnutdinov V. A. Dokichev G. A. Tolstikov O. M. Nefedov 《Russian Chemical Bulletin》1979,28(11):2450-2452
Conclusions We were the first to study the cyclic homo- and cooligomerization of 2-cyclopropyl-1,3-butadiene with butadiene and isoprene in the presence of catalysts based on nickel. The conditions were found for obtaining 1,5-dicyclopropyl-1,5-cyclooctadiene, 1-cyclopropyl-1,5-cyclooctadiene, 1-cyclopropyl-5-methyl-1,5-cyclooctadiene, and 1-cyclopropyl-5,9 (8)-dimethyl-1,5,9-cyclododecatriene.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 11, pp. 2634–2636, November, 1979. 相似文献
7.
L. M. Khalilov O. V. Shitikova V. S. Sultanova V. A. Dokichev C. Z. Sultanov A. A. Panasenko U. M. Dzhemilev G. A. Tolstikov 《Russian Chemical Bulletin》1990,39(3):481-484
The13C NMR spectra of 15 spirocyclopropane derivatives in the (C7)-norbornane series have been investigated, signal assignments made, and the stereochemistry of isomeric products has been determined. It was found that the methylene group signals in the cyclopropane fragment may be used as criteria in making the stereochemical assignments.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 3, pp. 555–559, March, 1990. 相似文献
8.
R. R. Shakirov L. I. Vlasova D. V. Shishkin N. N. Yarmukhamedov N. Z. Baybulatova D. G. Semesko V. A. Dokichev Yu. V. Tomilov 《Russian Chemical Bulletin》2005,54(7):1737-1743
5-Nitropentan-2-one reacts with methylamine and formaldehyde according to the Mannich reaction pattern to give 5-hexahydropyrimidinylcarbonyl-substituted
1-nitro-3,7-diazabicyclo[3.3.1]nonane in one experimental stage. When methyl 3-R-4-nitrobutanoates are used, the reaction
stops after the formation of substituted 5-nitrohexahydropyrimidines in 40–98% yields.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 7, pp. 1687–1693, July, 2005. 相似文献
9.
Murinov Yu. I. Golubyatnikova L. G. Khisamutdinov R. A. Badamshin A. G. Dokichev V. A. 《Russian Journal of General Chemistry》2020,90(11):2048-2052
Russian Journal of General Chemistry - trans-Dichloropalladium(II) complexes with amino acid esters PdCl2L2 have been synthesized via selective hydrolytic cleavage of the nitrogen–carbon bond... 相似文献
10.
L. I. Vlasova N. Z. Baibulatova S. A. Grabovski M. Haukka V. A. Dokichev Yu. V. Tomilov 《Journal of Structural Chemistry》2013,54(2):465-467
By a single crystal X-ray diffraction study the molecular structure of 3,7-dimethyl-9-thia-3,7-diazabicyclo[3.3.1]nonane-9,9-dioxide having a chair-chair conformation with a diequatorial arrangement of methyl groups at nitrogen atoms is determined. Compound 1 C8H16N2O2S crystallizes in the space group Pnma with the following cell parameters: a = 11.0262(3) Å, b = 14.4490(3) Å, c = 6.1780(3) Å. 相似文献