全文获取类型
收费全文 | 122篇 |
免费 | 0篇 |
专业分类
化学 | 122篇 |
出版年
2022年 | 2篇 |
2021年 | 3篇 |
2020年 | 2篇 |
2019年 | 4篇 |
2018年 | 7篇 |
2017年 | 4篇 |
2016年 | 6篇 |
2015年 | 5篇 |
2014年 | 3篇 |
2013年 | 13篇 |
2012年 | 6篇 |
2011年 | 4篇 |
2010年 | 5篇 |
2009年 | 4篇 |
2008年 | 2篇 |
2007年 | 2篇 |
2006年 | 1篇 |
2005年 | 4篇 |
2003年 | 1篇 |
1998年 | 1篇 |
1997年 | 1篇 |
1992年 | 1篇 |
1991年 | 1篇 |
1990年 | 4篇 |
1989年 | 5篇 |
1988年 | 4篇 |
1987年 | 6篇 |
1986年 | 3篇 |
1984年 | 1篇 |
1980年 | 2篇 |
1979年 | 4篇 |
1977年 | 2篇 |
1972年 | 2篇 |
1970年 | 3篇 |
1967年 | 1篇 |
1963年 | 1篇 |
1962年 | 2篇 |
排序方式: 共有122条查询结果,搜索用时 15 毫秒
1.
V. B. Sokolov A. N. Chekhlov T. A. Epishina I. V. Martynov 《Russian Chemical Bulletin》1992,41(2):236-240
The O-(arylcarbamoyl)butyrhydroximoyl chlorides were synthesized, and the x-ray structural analysis (XSA) of one of them — O-(o-tolylcarbamoyl)butyrhydroximoyl chloride — was performed. It was established from the data of the XSA and the PMR spectra that all synthesized compounds are the Z isomers.Institute of Physiologically Active Substances, Russian Academy of Sciences, 142432 Chernogolovka. Translated from Izvestiya Akademii Nauk, Seriya Khimicheskaya, No. 2, pp. 315–319, February, 1992. 相似文献
2.
The oxime of the hitherto unknown 3-amino-5-nitrobenzaldehyde was synthesized by the reaction of 3-amino-5-nitrobenzaldehyde
phenylhydrazone with excess of (NH2OH)2·H2SO4. The oxime obtained was used as the starting compound for the synthesis of novel diaryl- and arylnitrofuroxans.
Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 12, pp. 2232–2235, December, 1997. 相似文献
3.
A. S. Kulikov M. A. Epishina I. V. Ovchinnikov N. N. Makhova 《Russian Chemical Bulletin》2007,56(8):1580-1587
The conditions for the thermolysis of furoxans annulated with differently strained five-membered carbocycles (cyclopentafuroxan
1, norbornenofuroxan 2, and acenaphthofuroxan 3) to bis(nitrile oxides) in the presence of various dipolarophiles (diethyl acetylenedicarboxylate, benzoylformonitrile, and
ethoxycarbonylformonitrile) were optimized. It was found that the reactivities of the above furoxans as sources of bis(nitrile
oxides) decrease in the order 2 > 1 > 3. Among the furoxans studied, only norbornenofuroxan 2 can be recommended as a possible cross-linking reagent for polymers. The formation of di-N-oxides of 3,4-bis(cyanopropyl)-, 3,4-bis(cyanocyclopentyl)-, and 3,4-bis(cyanonaphthyl)furoxans was detected. They resulted
from intermolecular cyclodimerization of bis(nitrile oxides) initially formed in the thermolysis of furoxans 1–3.
Dedicated to Academician V. A. Tartakovsky on the occasion of his 75th birthday.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 8, pp. 1521–1528, August, 2007. 相似文献
4.
5.
6.
S. O. Bachurin D. V. Vinogradova E. F. Shevtsova T. V. Goreva T. A. Epishina A. Yu. Aksinenko V. B. Sokolov 《Russian Chemical Bulletin》2013,62(3):816-819
An approach to the modification of biologically active gamma-carbolines with the N-substituted propionamide fragments by the reaction of N-substituted acrylamides with gamma-carbolines catalyzed by cesium fluoride has been suggested. The compounds synthesized were studied for the influence on the functional characteristics of brain mitochondria, in particular, on the membrane potential, calcium-induced “swelling” and calcium capasity of the rat brain mitochondria. 相似文献
7.
Russian Chemical Bulletin - A synthetic approach to the modification of the drug Edaravone with pharmacoactive moieties of adamantane, carbazole, tetrahydrocarbazole, and γ-carboline was... 相似文献
8.
Sokolov V. B. Aksinenko A. Yu. Goreva T. V. Epishina T. A. Gabrel’yan A. V. Grigoriev V. V. 《Russian Journal of General Chemistry》2020,90(1):32-38
Russian Journal of General Chemistry - Copper-catalyzed alkyne-azide 1,3-dipolar cycloaddition of methyl esters of N-azidoacetyl-2-aminothiophene-3-carboxylic acids to N-propargyl-containing... 相似文献
9.
Margarita A. Epishina Alexander S. Kulikov Leonid L. Fershtat 《Molecules (Basel, Switzerland)》2022,27(8)
A series of novel 1,4-dihydrobenzo[1,2,4][e]triazines bearing an acetyl or ester moiety as a functional group at the C(3) atom of the 1,2,4-triazine ring were synthesized. The synthetic protocol is based on an oxidative cyclization of functionally substituted amidrazones in the presence of DBU and Pd/C. It was found that the developed approach is suitable for the preparation of 1,4-dihydrobenzo[e][1,2,4]triazines, but the corresponding Blatter radicals were isolated only in few cases. In addition, a previously unknown dihydrobenzo[e][1,2,4]triazolo[3,4-c][1,2,4]triazine tricyclic open-shell derivative was prepared. Studies of thermal behavior of the synthesized 1,4-dihydrobenzo[1,2,4][e]triazines revealed their high thermal stability (up to 240–250 °C), which enables their application potential as components of functional organic materials. 相似文献
10.
Sokolov V. B. Aksinenko A. Yu. Epishina T. A. Goreva T. V. 《Russian Chemical Bulletin》2009,58(3):631-633
3-Fluoro-2-trifluoromethylimidazo[1,2-a]pyridines were obtained by reactions of hexafluoroacetone 2-pyridylimines with trimethyl phosphite and studied in reactions
with sodium methoxide. This gave the corresponding 3-methoxy-2-trifluoromethylimidazo[1,2-a]pyridines. 相似文献