全文获取类型
收费全文 | 112篇 |
免费 | 0篇 |
专业分类
化学 | 46篇 |
数学 | 28篇 |
物理学 | 38篇 |
出版年
2020年 | 1篇 |
2017年 | 1篇 |
2016年 | 3篇 |
2015年 | 2篇 |
2014年 | 1篇 |
2013年 | 14篇 |
2012年 | 4篇 |
2011年 | 4篇 |
2010年 | 2篇 |
2009年 | 5篇 |
2008年 | 3篇 |
2007年 | 7篇 |
2006年 | 5篇 |
2005年 | 2篇 |
2004年 | 6篇 |
2003年 | 3篇 |
2001年 | 3篇 |
2000年 | 5篇 |
1999年 | 1篇 |
1998年 | 2篇 |
1996年 | 4篇 |
1995年 | 1篇 |
1994年 | 1篇 |
1991年 | 2篇 |
1990年 | 2篇 |
1987年 | 3篇 |
1986年 | 1篇 |
1985年 | 1篇 |
1983年 | 2篇 |
1982年 | 4篇 |
1980年 | 1篇 |
1979年 | 1篇 |
1978年 | 2篇 |
1977年 | 2篇 |
1975年 | 2篇 |
1974年 | 3篇 |
1973年 | 1篇 |
1969年 | 4篇 |
1966年 | 1篇 |
排序方式: 共有112条查询结果,搜索用时 15 毫秒
51.
Zh. V. Ignatovich A. P. Kadutskii E. V. Koroleva A. V. Baranovskii K. N. Gusak 《Russian Journal of Organic Chemistry》2009,45(7):1070-1078
Schiff bases synthesized by condensation of 5- and 6-aminoquinolines, 5-amino-2-methylquinoline, nitroanilines, and pyrimidinylaminoanilines with substituted benzaldehydes and pyridinecarbaldehydes were reduced with sodium tetrahydridoborate in acetic acid to obtain the corresponding N-aryl(hetaryl)benzylamines, N-(pyridylmethyl)anilines, and N-(1,2,3,4-tetrahydroquinolyl)benzylamine derivatives. The reduction of arylhetarylimines with hydrazine hydrate in the presence of Raney nickel involved only the azomethine C=N bond, while the nitrogen-containing heteroaromatic ring remained intact. Under analogous conditions, nitrosubstituted Schiff bases and benzyl- and pyridylmethylamines were converted into previously unknown N-(aminobenzyl)quinolinamines and aryl(pyridyl)methyl-substituted phenylenediamines. 相似文献
52.
By condensations of 2-naphthylamine and 6-aminoquinoline with halogen-substituted benzaldehydes, 3-acetylpyridine and acetophenone
derivatives new 1,3-diaryl(heteryl)benzo-[f]quinolines and 4,7-phenanthrolines were synthesized containing atoms of fluorine, bromine, and chlorine in the phenyl rings. 相似文献
53.
N. G. Kozlov A. B. Tereshko E. V. Koroleva Zh. B. Ignatovich K. N. Gusak 《Russian Journal of Organic Chemistry》2009,45(2):259-265
Condensation of 5-phenyl-1,3-cyclohexanedione and 5-(p-methoxyphenyl)-1,3-cyclohexanedione with 5-quinolylamine and aldehydes of aromatic, heteroaromatic, and cyclohexene series provided new 7-aryl(heteryl, cyclohexenyl)-10-phenyl- or (p-methoxyphenyl)-7,10,11,12-tetrahydro-9H-benzo[b][1,7]phenanthrolin-8-ones containing two asymmetrical atoms C7 and C10. 1H NMR spectroscopy revealed the presence of diastereomers in the target reaction products. 相似文献
54.
By condensation of 5-phenyl-1,3-cyclohexanedione with 6-quinolylamine and aldehydes of aromatic, heterocyclic, and cyclohexene series new 12-aryl(heteryl, cyclohexenyl)-9-phenyl-8,9,10,12-tetrahydro-7H-benzo[b][4,7]phenanthrolin-11-ones were prepared. The presence of diastereomers in the target reaction products was determined by 1H NMR spectroscopy.__________Translated from Zhurnal Organicheskoi Khimii, Vol. 41, No. 5, 2005, pp. 742–748.Original Russian Text Copyright © 2005 by Gusak, Tereshko, Kozlov. 相似文献
55.
Characteristics of nonlinear optical phenomena in reflection of light at the interface with photorfractive crystals having
photovoltaic nonlinearity are studied. it is shown that under total reflection, hysteretic behavior of the reflection coefficient
is possible as a function of the incident radiation intensity or the angle of incidence. It is important that previously required
threshold intensities are rather low (≤1 W/cm2) in comparison with the known case of reflection from media with Kerr nonlinearity. The present results are of doubtless
interest in view of the development of possible devices for controlling laser radiation.
Interdepartmental Institute of Advanced Training of Personnel in New Trends in Engineering and Technology at the State Polytechnical
Academy of Belarus, 77, Partizanskii Ave., Minsk-107, 220600 Belarus. Translated from Zhurnal Prikladnoi Spektroskopii, Vol.
65, No. 6, pp. 915–920, November–December, 1998. 相似文献
56.
Condensation of arylmethylene(6-quinolyl)amines with hydroxy- and nitro-substituted acetophenones was used to synthesize 1,3-diaryl-4,7-phenanthrolines containing hydroxy and nitro groups in the phenyl rings. 相似文献
57.
58.
E. V. Koroleva K. N. Gusak Zh. V. Ignatovich A. L. Ermolinskaya 《Russian Journal of Organic Chemistry》2011,47(10):1556-1563
New carboxylic acid amides containing an N-methylpiperazine fragment were synthesized by reactions of 1-methylpiperazine or 3- and 4-(4-methylpiperazin-1-ylmethyl)aniline
with 4-chlorobenzoyl chloride and of 4-methyl-3-nitroaniline with 4-(4-methylpiperazin-1-ylmethyl)benzoyl chloride or benzotriazol-1-yl
4-(4-methylpiperazin-1-ylmethyl)benzoate. 4-Chloro-N-[4-(4-methylpiperazin-1-ylmethyl)phenyl]benzamide reacted with imidazole, quinolin-5-amine, and 2-methylquinolin-5-amine
to give substituted 4-amino-N-[4-(4-methylpiperazin-1-ylmethyl)phenyl]benzamides. 4-Methyl-3-nitrophenyl-4-methylpiperazin-1-yl-substituted benzamides
were reduced with hydrazine hydrate over Raney nickel to obtain N-(3-amino-4-methylphenyl)-4-(4-methylpiperazin-1-ylmethyl)benzamide as key intermediate in the synthesis of antileukemic agent
imatinib and its isomer with alternative position of the amide group, 4-[(3-amino-4-methylphenylamino)methyl]phenyl-(4-methylpiperazin-1-yl)methanone. 相似文献
59.
60.