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1.
M. Grin’ko V. Kulcitki N. Ungur A. Barba K. Delyanu P. F. Vlad 《Chemistry of Natural Compounds》2007,43(3):277-281
Several α,ω-bifunctional derivatives of E,E,E-geranylgeraniol were prepared via convergent synthesis starting with geraniol (8), which was converted in three steps into the tetrahydropyranyl ether of 8-chlorogeraniol (9) and 8-hydroxygeranylphenylsulfone (10). Combination of synthons 9 and 10 with subsequent reductive removal of the phenylsulfonyl group produced the tetrahydropyranyl ether of ω-hydroxygeranylgeraniol (5), hydrolysis of which gave exclusively trans-ω-hydroxygeranylgeraniol (1). Derivatives 5–7 of geranylgeraniol were synthesized using standard methods.
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Translated from Khimiya Prirodnykh Soedinenii, No. 3, pp. 231–234, May–June, 2007. 相似文献
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A. B. Serov V. G. Kartsev Yu. A. Aleksandrov F. M. Dolgushin 《Russian Chemical Bulletin》2005,54(10):2432-2436
A series of 6a′,7′,8′,9′-tetrahydrospiro[indoline-3,7′-pyrrolo[1,2-a]quinoline]-2-one derivatives were synthesized by the 1,3-dipolar cycloaddition reaction. The regio-and stereoselectivity
of the reaction were established by X-ray diffraction study.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 10, pp. 2357–2361, October, 2005. 相似文献
3.
By the reaction of vanillin and vanillal derivatives with 2-aminophenol previously unknown E isomers of azomethines (Schiff bases) containing hydroxy, ether, and ester groups were synthesized. 相似文献
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O. I. Dyubchenko V. V. Nikulina E. I. Terakh A. E. Prosenko I. A. Grigor’ev 《Russian Journal of Applied Chemistry》2005,78(5):781-786
Aminoalkylphenols of various structures were prepared by reactions of ω-[4-hydroxy(methoxy)aryl]haloalkanes with dialkylamines. The corresponding N-oxides were prepared by oxidation of aminoalkylphenols with hydrogen peroxide and cumene hydroperoxide. The inhibiting activities of these compounds in a model reaction of thermal autooxidation of lard were compared.__________Translated from Zhurnal Prikladnoi Khimii, Vol. 78, No. 5, 2005, pp. 796–801.Original Russian Text Copyright © 2005 by Dyubchenko, Nikulina, Terakh, Prosenko, Grigor’ev. 相似文献
5.
A. D. Dubonosov V. P. Rybalkin Ya. Yu. Vorob’eva V. A. Bren’ V. I. Minkin S. M. Aldoshin V. V. Tkachev A. V. Tsukanov 《Russian Chemical Bulletin》2004,53(10):2248-2252
It was shown by electron absorption spectroscopy and X-ray diffraction analysis that steric strains in photochromic 2-(N-acyl-N-arylaminomethylene) benzo[b]thiophen-3(2H)-one molecules ortho-substituted in the N-phenyl ring increase the quantum yield of the N→O photoinduced rearrangement in accord with an increase in the steric constant of the ortho-substituent.__________Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 10, pp. 2151–2155, October, 2004. 相似文献
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Emanuel Makrlík Jiří Dybal Jan Budka Petr Vaňura 《Monatshefte für Chemie / Chemical Monthly》2009,140(10):1155-1158
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T. G. Drushlyak L. A. Kutulya N. S. Pivnenko V. V. Vashchenko 《Russian Journal of General Chemistry》2005,75(4):622-627
Carbonylation of (E)-2-(4-halobenzylidene)-p-menthan-3-ones, catalyzed by PdCl2(PPh3)2, gave a distereometric mixure of 4-[(1R,4R)- and (1R,4S)-3-oxo-p-menthan-2-ylidenemethyl]benzoic acids, whose reaction with phenols gave 1R,4R diastereomers of the corresponding esters.__________Translated from Zhurnal Obshchei Khimii, Vol. 75, No. 4, 2005, pp. 659–664.Original Russian Text Copyright © 2005 by Drushlyak, Kutulya, Pivnenko, Vashchenko. 相似文献
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M. K. Bratenko O. I. Panimarchuk V. A. Chornous M. V. Vovk 《Russian Journal of Organic Chemistry》2005,41(1):98-102
Reduction with sodium tetrahydridoborate of Schiff bases derived from 3-aryl(heteryl)pyrazole-4-carbaldehydes and benzylamines gave N-benzyl-N-[3-aryl(heteryl)-4-pyrazolylmethylene]amines which were acylated with benzoyl chloride and succinic and maleic anhydrides to obtain the corresponding amides. Treatment of the title compounds with phenyl isothiocyanate afforded substituted thioureas.__________Translated from Zhurnal Organicheskoi Khimii, Vol. 41, No. 1, 2005, pp. 98–103.Original Russian Text Copyright © 2005 by Bratenko, Panimarchuk, Chornous, Vovk. 相似文献
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V. Yu. Korotaev Yu. A. Skorik A. Yu. Barkov M. I. Kodess A. Ya. Zapevalov 《Russian Chemical Bulletin》2005,54(11):2545-2549
3,3,3-Trifluoro-N′-(3-trifluoromethylphenyl)-1,2-propanediamine (5) was synthesized by the reaction of 2-diazo-1,1,1-trifluoro-3-nitropropane or 3,3,3-trifluoro-1-nitropropene with 3-aminobenzotrifluoride
followed by the reduction of the nitro group. The Michael 1,4-addition of diamine 5 to acrylic acid occurs only at the N(1) atom and affords N-mono-or N,N-dicarboxyethyl derivatives 6 and 7, depending on the reactant ratio. Protolytic equilibria 5–7 in aqueous solutions were studied by pH-potentiometry and UV spectroscopy. Only the aliphatic amino group can be protonated
in an aqueous solution, while the aromatic amino group remains unprotonated even in 12 M HCl. The stability constants of transition metal (Cu2+, Ni2+, Zn2+) complexes with ligands 5–7 were determined by pH-potentiometric titration. The stability of the complexes and selectivity of the ligands toward Cu2+ ions increase with an increase in the number of N-carboxyethyl groups.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 11, pp. 2465–2469, November, 2005. 相似文献
14.
I. G. Ovchinnikova O. V. Fedorova L. G. Kuz’mina P. A. Slepukhin A. A. Tumashov G. L. Rusinov V. N. Charushin 《Russian Chemical Bulletin》2009,58(11):2288-2298
Differences in the parameters of pre-organization of chalcone podands to intermolecular photoinduced [2+2] cycloaddition (PCA)
in crystals were discovered. As a result of PCA, the chalcone podand with two oxyethylene units forms stereoregular cyclobutane-containing
polymer chains over the whole volume of the single crystal. In the case of the chalcone podand with one oxyethylene unit,
the PCA reaction in single crystal becomes impossible; however, its mechanical destruction results in the formation of surface
layers with stacking dimers. In these layers, photodimerization occurs due to a decrease in topochemical control from the
molecular lattice. 相似文献
15.
Mohamed El-Sayed Hardy Müller Gerd Rheinwald Heinrich Lang Stefan Spange 《Monatshefte für Chemie / Chemical Monthly》2003,134(3):361-370
Summary. N-(2′-Hydroxy-4′-N,N-dimethylaminobenzylidene)-4-nitroaniline [HDBN] has been used as a model for investigating intra- and intermolecular D–A (donor–acceptor) interactions in various environments
by means of UV/Vis spectroscopy. UV/Vis spectra of HDBN have been measured in various solvents, ethanolic solutions of different pH, adsorbed on silica, and in the solid state. A bathochromic shift of νmax is observed with increasing the dipolarity/polarizability and HBD (hydrogen bond donor) capacity of the solvent, which is
described by means of a multiple LSE (linear solvation energy) relationship in terms of the empirical Kamlet-Taft solvent polarity parameters. The adsorption of HDBN on Aerosil? 300-silica particles in non-HBA (hydrogen bond acceptor) solvents is explained in the same sense. Mobile protons and sol–gel
entrapping cause a hypsochromic shift due to protonation of the lone electron pair of the 4′-N,N-dimethylamino group. Hydroxide ions attack the 2′-hydroxy group which causes a bathochromic shift. A strong intramolecular
hydrogen bond between the 2′-hydroxyl hydrogen and the imine nitrogen atom is present in the solid-state structure causing
an unprecedented bathochromic shift.
Corresponding author. E-mail: stefan.spange@chemie.tu-chemnitz.de
Received July 8, 2002; accepted (revised) September 30, 2002 相似文献
16.
O. Yu. Sapozhnikov V. V. Dyachuk M. D. Dutov V. V. Kachala S. A. Shevelev 《Russian Chemical Bulletin》2005,54(5):1331-1334
A method is developed for the preparation of 4-(vic-triazol-1-yl)indoles that involves replacement of the ortho-NO2 group in E-2,4,6-trinitrostilbenes by an azido group, condensation of E-2-azido-4,6-dinitrostilbenes with acetylacetone, replacement of the second ortho-NO2 group in the resulting stilbenes by N3, and subsequent thermolysis of the azide into the target indole. The reactions of E-2-azido-4,6-dinitrostilbenes with cyclohexane-1,3-dione gave E-2-amino-4,6-dinitrostilbenes, which can be used for selective transformation of the ortho-NO2 group into an amino group in E-2,4,6-trinitrostilbenes.
Dedicated to Academician N. K. Kochetkov on the occasion of his 90th birthday.
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Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 5, pp. 1293–1296, May, 2005. 相似文献
17.
Jiří Dybal Emanuel Makrlík Petr Vaňura 《Monatshefte für Chemie / Chemical Monthly》2007,138(6):541-543
Summary. By using DFT calculations, the most probable structure of the p-tert-butylcalix[4]arenetetrakis(N,N-diethylacetamide) · H3O+ complex species was derived. In this complex, the hydroxonium ion H3O+ is predominantly bound by strong hydrogen bonds to three phenoxy oxygens of the ligand and partly to the remaining phenoxy
oxygen atom by two somewhat weaker hydrogen bonds. Besides, the H3O+ cation is also bound to two carbonyl oxygens of the mentioned ligand by further two weaker hydrogen bonds. 相似文献
18.
Yu. A. Aizina I. B. Rozentsveig I. V. Ushakova G. G. Levkovskaya A. N. Mirskova 《Russian Journal of Organic Chemistry》2005,41(1):91-94
Reactions of N-(2,2,2-trichloroethylidene)arenesulfonamides with thiophene, 2-chlorothiophene, and 2,5-dichlorothiophene, as well as of N-(2,2,2-trichloro-1-hydroxyethyl)arenesulfonamides with 2-chlorothiophene, lead to formation of the corresponding N-(2,2,2-trichloro-1-thienylethyl)arenesulfonamides. Alkaline hydrolysis of the latter occurs selectively at the trichloromethyl group to give N-arylsulfonyl-α-thienylglycines.__________Translated from Zhurnal Organicheskoi Khimii, Vol. 41, No. 1, 2005, pp. 93–96.Original Russian Text Copyright © 2005 by Aizina, Rozentsveig, Ushakova, Levkovskaya, Mirskova. 相似文献
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I. S. Ivanova A. V. Dorokhov E. N. Pyatova A. V. Bicherov A. S. Burlov A. D. Garnovskii A. Yu. Tsivadze 《Russian Journal of Coordination Chemistry》2005,31(7):483-488
Complexes of Li, Na, and K with N-(4′-benzo-15-crown-5)-2-(amino-N-tosyl)-phenylaldimine (L) are synthesized and their IR spectra are studied with assignment of the basic vibration frequencies of the ligand and complexes. The conformation states of macrocycles in the title complexes are analyzed. The macrocycle conformation in complexes of L with the Li, Na, and K salts is not influenced by the nature of a metal or acido ligands. The structures of the synthesized compounds are suggested on the basis of the spectral and elemental analysis data.__________Translated from Koordinatsionnaya Khimiya, Vol. 31, No. 7, 2005, pp. 512–517.Original Russian Text Copyright © 2005 by Ivanova, Dorokhov, Pyatova, Bicherov, Burlov, Garnovskii, Tsivadze. 相似文献