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排序方式: 共有162条查询结果,搜索用时 15 毫秒
1.
S. O. Kolusheva B. A. Salakhutdinov T. F. Aripov L. P. Vernon 《Chemistry of Natural Compounds》1994,29(4):523-525
It has been shown by the ESR of spin probes that thionin initially interacts with with negatively charged membranes electrostatically and then passes into the membranes to a depth comparable with the length of the hydrophobic sections of the protein loops.Institute of Bioorganic Chemistry, Academy of Sciences of the Republic of Uzbekistan, Tashkent. Brigham Young University, Provo, Utah, USA. Translated from Khimiya Prirodnykh Soedinenii, No. 4, pp. 594–597, July–August, 1993. 相似文献
2.
T. G. Kuznetsova K. G. Ione N. F. Salakhutdinov 《Reaction Kinetics and Catalysis Letters》1997,62(2):273-280
The interaction of α-methacrolein with mixedtrans- andcis-alloocimenes on β zeolite has been studied at room temperature in a solvent under various conditions. The scheme of the process
has been specified including the formation of (4+2) and (3+2)-cycloaddition products and strongly adsorbed alloocimene species. 相似文献
3.
Volcho K. P. Tatarova L. E. Suslov E. V. Korchagina D. V. Salakhutdinov N. F. Barkhash V. A. 《Russian Journal of Organic Chemistry》2001,37(10):1418-1429
Reactions of camphene, -fenchene, limonene, caryophyllene, - and -pinenes, verbenol, walterol, and verbenone with acylating agents in the presence of clay K-10 and wide-porous -zeolite were studied. Presumable schemes and rules of the occurring processes were considered. 相似文献
4.
I. V. Il’ina K. P. Volcho D. V. Korchagina N. F. Salakhutdinov V. A. Barkhash 《Russian Journal of Organic Chemistry》2004,40(10):1432-1436
Transformations of epoxide derived from nopol in the presence of natural askanite-bentonite clay were studied. The major products of the isomerization in the cold are diols possessing a p-menthane skeleton, which are readily converted into bicyclic ethers when the reaction is carried out at room temperature.Translated from Zhurnal Organicheskoi Khimii, Vol. 40, No. 10, 2004, pp. 1483–1487.Original Russian Text Copyright © 2004 by Ilina, Volcho, Korchagina, Salakhutdinov, Barkhash. 相似文献
5.
Irina V. Il'ina Konstantin P. Volcho Dina V. Korchagina Vladimir A. Barkhash Nariman F. Salakhutdinov 《Helvetica chimica acta》2007,90(2):353-368
The reactivity of allyl alcohols of the pinane series and of their epoxides in the presence of montmorillonite clay in intra‐ and intermolecular reactions was studied. Mutual transformations of (+)‐trans‐pinocarveol ((+)‐ 2 ) and (?)‐myrtenol ((?)‐ 3a ) were major reactions of these compounds on askanite–bentonite clay (Schemes 1 and 2). However, the two reactions gave different isomerization products, indicating that the reactivity of the starting alcohol (+)‐ 2 or (?)‐ 3a was different from that of the same compound (+)‐ 2 or (?)‐ 3 formed in the course of the reactions. (?)‐cis‐ and (+)‐trans‐Verbenol ((?)‐ 16 and (+)‐ 12 , resp.), as well as (?)‐cis‐verbenol epoxide ((?)‐ 20 ) reacted with both aliphatic and aromatic aldehydes on askanite–bentonite clay giving various heterocyclic compounds (Schemes 4, 5 and 7); the reaction path depended on the structure of both the terpenoid and the aldehyde. 相似文献
6.
The electronic structure of the benzaldehyde molecule has been studied by X-ray emission spectroscopy. The gas-phase O-K- and C-K-spectra of this compound have been obtained. MNDO quantum-chemical calculations have been carried out. The structure of the MO's of benzaldehyde has been compared with those of benzene and formaldehyde molecules. The character of the p-p interaction of the phenyl and formyl fragments has been considered. The contribution of the latter to the highest occupied molecular orbitals of the-system has been shown to be small.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 6, pp. 1033–1037, June, 1994. 相似文献
7.
Il’ina I. V. Korchagina D. V. Morozova E. A. Tolstikova T. G. Volcho K. P. Salakhutdinov N. F. 《Russian Chemical Bulletin》2019,68(5):1061-1066
Russian Chemical Bulletin - A series of compounds with a hydrogenated 2H-chromene skeleton was synthesized by the reaction of ketones and available para-menthane monoterpenoid (—)-isopulegol.... 相似文献
8.
V. I. Anikeev V. P. Sivcev I. V. Il’ina D. V. Korchagina O. B. Statsenko K. P. Volcho N. F. Salakhutdinov 《Russian Journal of Physical Chemistry A, Focus on Chemistry》2013,87(3):382-387
The reactivity of verbenol epoxide and isopulegol in supercritical solvents in the presence of aromatic aldehydes was studied using a flow type reactor and a heterogeneous catalyst (Al2O3) or no catalyst. The intramolecular transformations or interactions of reagents with the solvent prevailed in all cases; the yield of the products of intermolecular reactions of terpenoids with aldehydes was up to 1%. The aldehydes did not interact with verbenol epoxide but produced a considerable effect on the distribution of its isomerization products. 相似文献
9.
V. I. Anikeev V. P. Sivcev K. P. Volcho N. F. Salakhutdinov 《Russian Journal of Physical Chemistry A, Focus on Chemistry》2013,87(11):1940-1942
The reactivity of α- and β-ionones under the supercritical conditions in a flow type reactor in the presence of Al2O3 at 200–230°C was studied. α-Ionone was reduced to α-ionol, while β-ionol was unstable already at 200°C and underwent dehydration. The secondary reaction products were the corresponding megastigmatrienes. 相似文献
10.
Elizaveta D. Gladkova Arina A. Chepanova Ekaterina S. Ilina Alexandra L. Zakharenko Jhannes Reynisson Olga A. Luzina Konstantin P. Volcho Olga I. Lavrik Nariman F. Salakhutdinov 《Molecules (Basel, Switzerland)》2021,26(7)
A new type of berberine derivatives was obtained by the reaction of berberrubine with aliphatic sulfonyl chlorides. The new polycyclic compounds have a sultone ring condensed to C and D rings of a protoberberine core. The reaction conditions were developed to facilitate the formation of sultones with high yields without by-product formation. Thus, it was shown that the order of addition of reagents affects the composition of the reaction products: when sulfochlorides are added to berberrubine, their corresponding 9-O-sulfonates are predominantly formed; when berberrubine is added to pre-generated sulfenes, sultones are the only products. The reaction was shown to proceed stereo-selectively and the cycle configuration was confirmed by 2D NMR spectroscopy. The inhibitory activity of the synthesized sultones and their 12-brominated analogs against the DNA-repair enzyme tyrosyl-DNA phosphodiesterase 1 (Tdp1), an important target for a potential antitumor therapy, was studied. All derivatives were active in the micromolar and submicromolar range, in contrast to the acyclic analogs and 9-O-sulfonates, which were inactive. The significance of the sultone cycle and bromine substituent in binding with the enzyme was confirmed using molecular modeling. The active inhibitors are mostly non-toxic to the HeLa cancer cell line, and several ligands show synergy with topotecan, a topoisomerase 1 poison in clinical use. Thus, novel berberine derivatives can be considered as candidates for adjuvant therapy against cancer. 相似文献