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1.
Chalcogenation of 1,3-dichloropropene with elemental chalcogens in the system hydrazine hydrate–base
E. P. Levanova V. S. Nikonova V. A. Grabel’nykh I. B. Rozentsveig N. V. Russavskaya A. I. Albanov N. A. Korchevin 《Russian Journal of General Chemistry》2016,86(6):1282-1287
Sulfur reacts with 1,3-dichloropropene in the system hydrazine hydrate–KOH to form bis(1-chloroprop-1-en-3-yl) sulfide, and in the system hydrazine hydrate–monoethanolamine, bis(1-chloroprop-1-en- 3-yl) disulfide. The reaction of tellurium in the system hydrazine hydrate–KOH leads to diallyl telluride, the product of nucleophilic substitution of the allylic chlorine atom and reductive cleavage of the Сsp2–Cl bond. The reaction of selenium with 1,3-dichloropropene gives a complex mixture of products. At excess KOH (Se: KOH = 1: 5) bis(1-chloroprop-1-en-3-yl) selenide was isolated. 相似文献
2.
E. P. Levanova V. S. Vakhrina V. A. Grabel’nykh I. B. Rozentsveig N. V. Russavskaya A. I. Albanov L. V. Klyba N. A. Korchevin 《Russian Chemical Bulletin》2015,64(9):2083-2089
A reaction of organic dichalcogenides R2Y2 (R = Ph, Bn, Pr; Y = S, Se) with 1,4-dichlorobut-2-yne in the system hydrazine hydrate–KOH leads to four principal products: 1,4-bis(organylchalcogenyl)but-2-ynes, 1-organylchalcogenylbut-1-en-3-ynes, 4-organylchalcogenylbut-1-en-3-ynes, and 3(5)-methylpyrazole. The selectivity of the formation of individual products is determined by the ratio of the substrates used and the reaction temperature. A plausible mechanism of chalcogenation considered in the work agrees with the effect of the nature of chalcogene atoms and organic substituents R on stability of intermediates and products. The stabilization of carbanions by α chalcogene-containing groups corresponds to the following order: PhS > PhSe > BnS > BnSe > PrS. 相似文献
3.
β-Sulfinyl α,β-unsaturated ketones (2a-f) reacted in a regioselective manner with dienes such as butadiene (3a) and 1,3-pentadiene (3b) to give 1,4-cyclohexadiene derivatives (4-8) with the concomitant elimination of sulfenic acid, while the ketones (2a-c) reacted with cyclopentadiene (3c) to yield the norbornenes (9). 相似文献
4.
Tolstikova L. L. Danilevich Yu. S. Shainyan B. A. 《Russian Journal of Organic Chemistry》2018,54(7):1103-1105
The alkylating activity of N-allyl- and N-propargyltriflimides toward N,N′-dicyclohexyl- and N,N′-diphenylcarbodiimides has been studied. Activation of the nitrogen atom by two electron-withdrawing trifluoromethanesulfonyl groups favors cleavage of the C–N bond in the absence of a catalyst with the formation of N-substituted unsaturated ureas.
相似文献5.
A. G. Mkhitaryan G. K. Kadorkina Yu. I. Él'natanov I. I. Chervin A. É. Aliev R. G. Kostyanovskii 《Russian Chemical Bulletin》1992,41(9):1665-1671
The reactions of aziridine, its dimer, 2,2-dimethylaziridine dimer, and the novel compound ,-bis-N-aziridinoethylamine with aromatic aldehydes and dialdehydes have given novel compounds.N. N. Semenov Institute of Chemical Physics, Russian Academy of Sciences, 117977 Moscow. Translated from Izvestiya Akademii Nauk, Seriya Khimicheskaya, No. 9, pp. 2131–2137, September, 1992. 相似文献
6.
Conclusions N-Triphenylborazole and B-methyl-N-triphenylborazole enter into a condensation reaction with the bis-, '-aminodiethyl ester of trimethylenediboric acid, forming polymers with reticular and linear structures, respectively.The authors would like to thank L. I. Zakharkin and A. I. Kovredov for providing the bis-, '-aminodiethyl ester of trimethylenediboric acid. 相似文献
7.
Makarenko S. V. Trukhin E. V. Berestovitskaya V. M. 《Russian Journal of General Chemistry》2003,73(4):603-606
The reactions of ,-dibromo--nitrostyrenes with acetylacetone and ethyl acetoacetate were studied. The structures of the products were determined by 1H NMR, IR, and UV spectroscopy. The products derived from acetylacetone were converted into copper chelates. 相似文献
8.
A. Yu. Volkonsky V. R. Polishchuk E. M. Kagramanova E. I. Mysov N. E. Mysova M. Yu. Antipin Yu. T. Struchkov 《Russian Chemical Bulletin》1994,43(1):80-83
The 1:1 adducts of diethyl and ,,','-tetrakis(trifluoromethyl)divinyl ether (1),i.e., 3,5-(ee)-bis[2,2,2-trifluoro-1-(trifluoromethyl)ethyl]-2,6-dimethyl-1,4-dioxane (2) (3 isomers) and 4-ethoxy-1,1,1-trifluoro-2-trifluoromethyl-3-[3,3,3-trifluoro-2(trifluoromethyl)propenyloxy]pentane (3), have been obtained by UV-irradiation of a solution of divinyl ether1 in diethyl ether. The X-ray structural investigation of the all-(e)-isomer of dioxane (2) has been carried out.Deceased.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 1, pp. 85–88, January, 1994. 相似文献
9.
《Fluid Phase Equilibria》1988,43(1):29-44
Vapor Liquid Equilibria in mixtures of dimethyl ether, methyl chloride and methanol were investigated in a static equilibrium apparatus for temperatures 250 K < T <350 K and pressures up to 1 MPa. Temperature, pressure and the composition of the liquid and the vapor phase were determined.The consistency of the binary experimental data was checked and parameters of several gE-models were fitted. The binary parameters were used to predict the ternary VLE and the calculated results were compared with the experimental data. 相似文献
10.
I. I. Ponomarev Yu. Yu. Rybkin E. I. Goryunov P. V. Petrovskii K. A. Lyssenko 《Russian Chemical Bulletin》2004,53(12):2881-2883
The reaction of 4,4-dimethyldiphenyl ether with phosphorus trichloride in the presence of anhydrous aluminum chloride was studied. This reaction affords 2,8-dimethyl-10H-105-phenoxaphosphine 10-oxide as virtually the only product. In air, the latter in an alkaline solution is quantitatively transformed into 10-hydroxy-2,8-dimethyl-10H-105-phenoxaphosphine 10-oxide.__________Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 12, pp. 2762–2765, December, 2004. 相似文献
11.
G. V. Kryshtal G. M. Zhdankina I. V. Astakhova S. G. Zlotin 《Russian Chemical Bulletin》2004,53(3):647-651
Metal carbonate-catalyzed reactions of CH-acids (diethyl malonate, ethyl acetoacetate, ethyl cyanoacetate, and ethyl 2-acetyl- and 2-ethoxycarbonyl-5,9-dimethyldeca-4,8-dienoates) with ,-unsaturated aldehydes (acrolein, crotonaldehyde, citral) were studied in an ionic liquid, 1-butyl-3-methylimidazolium hexafluorophosphate [bmim][PF6], and in a 1-butyl-3-methylimidazolium bromide ([bmim][Br]) — benzene system. The reactions with acrolein and crotonaldehyde afforded Michael addition products, those with citral resulted in Knoevenagel addition products. Sonication increased the yields of the Michael adducts. The ionic liquid [bmim][PF6] can be recovered and repeatedly used in the reactions. 相似文献
12.
YU Sheng ZOU Peng ZHU Wei YANG LiuYan XIAO Lin JIANG LiJuan WANG XiaoLin WU Jun & YUAN Ye State Key Laboratory of Pollution Control Resource Reuse School of the Environment Nanjing University Nanjing China 《中国科学:化学》2010,(4)
In this study, effects of humic acids (HA) and microorganisms on the migration of hydrophobic organic contaminants (HOCs), decabromodiphenyl ether (BDE-209), 4,4′-dibromodiphenyl ether (BDE-15) and anthracene, in soils were examined. More soil particles were dispersed into the colloidal phase (0.22-1 μm) in the presence of HA and/or microorganisms as a result of increased erosion and friction. The study suggested that PBDEs (BDE-209 and BDE-15) and anthracene in soils would be transported to other places by... 相似文献
13.
G. A. Schwechheimer 《Russian Chemical Bulletin》1960,9(9):1570-1571
Summary A method is proposed for preparation of the -aminoethyl ether of dimethylethynylcarbinol from the -cyanoethyl ether of dimethylethynylcarbinol. 相似文献
14.
Vasil"ev L. S. Sheremetev A. B. Khoa N. K. Dem"yanets Z. K. Dmitriev D. E. Dorokhov V. A. 《Russian Chemical Bulletin》2001,50(7):1280-1286
In the presence of nickel acetylacetonate, -dicarbonyl compounds readily add at the nitrile group of 4-R-3-cyanofurazans to form enaminofurazans. The adducts obtained from 4-amino-3-cyanofurazan underwent intramolecular cyclization on heating with AcOH in EtOH to give furazano[3,4-b]pyridine derivatives in high yields. 相似文献
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16.
O. T. Kasaikina Z. S. Kartasheva A. B. Mazaletskii N. Yu. Sakova Zh. V. Shmyreva Kh. S. Shikaliev 《Russian Chemical Bulletin》1992,41(2):329-332
Phenols (hydroquinone and -tocopherol) and heterocyclic aminophenols (2,2,4-trimethyl-6-ethoxy-1,2-dihyroquinoline) reduce N,N-diphenyl-p-quinonediimine (A) to the diamine. With difunctional hydrogen atom donors, the reaction rate is proportional to the concentrations of the reactants. The effective rate constants have been determined over a range of temperatures. In the reaction of A with -tocopherol, plots of rate versus initial concentrations are nonlinear, 2,6-Di-tert-butyl-4-methylphenol and 2,2,4-trimethyl-6-ethoxy-1,2-dihyroquinoline do not react with A under the same conditions.N.N. Semenov Institute of Chemical Physics, Russian Academy of Sciences, 117977 Moscow. Translated from Izvestiya Akademii Nauk, Seriya Khimicheskaya, No. 2, pp. 417–420, February, 1992. 相似文献
17.
Simonyan G. S. Beileryan N. M. Pirumyan E. G. Roque J.-P. Boyer B. 《Kinetics and Catalysis》2001,42(4):474-478
The kinetics of reactions between ,-unsaturated compounds (UCs) (acrylonitrile (AN), acryl-amide (AA), and methacrylamide (MAA)) and secondary amines (As) (piperidine, morpholine, diethanolamine, diethylamine, and dipropylamine) in water, as well as in DMF, DMSO, formamide, and 1,4-dioxane for acrylonitrile, was studied. It was found that w= k[HC]0[A]0for all of the test pairs. Viscosity, permittivity, and solvation characteristics, such as solvent polarity, nucleophilicity, and electrophilicity, were taken into account in considering the solvent effect on the overall reaction rate. The electrophilicity (acidity) of a medium was found to exert the greatest effect on the reaction rate. It is believed that an increase in the electrophilicity is favorable for the rapid protonation of the UC–amine intermediate complex. The effects of amine basicity, ionization potential, and dipole moment and the steric parameters of substituents in amine molecules on the rates of reactions between the unsaturated compounds and secondary amines were considered. 相似文献
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19.
L. Bapat G. N. Natu G. Y. Rohokale 《Journal of Radioanalytical and Nuclear Chemistry》1992,165(2):127-136
-Irradiated KCl, KBr and KI are dissolved separately in the emulsion of water and aniline. Halogens as radiolytic products are extracted in aniline forming stable halogen-aniline complexes. Hole species from V2 and V3 centers and free halogens trapped in crystalline salts are solvated first in water phase during dissolution and immediately form complexes with aniline. A typical vibrational structure of absorption bands around 300 nm is observed. The yields of halogens and thereby complexes are found to depend upon the concentration of F and hole centers and the mesh of the salt. 相似文献
20.
Azadeh Nakhai 《Tetrahedron》2009,65(11):2298-9445
The reaction of hydrazine derivatives with α,β-unsaturated ketones, such as cyclohexenyl(phenyl)methanone and (E)-2-benzylidenecyclohexanone, were investigated.The reaction between methylhydrazine and e.g., cyclohexenyl(phenyl)methanone was particularly interesting as 3a,4,5,6,7,7a-hexahydro-1-methyl-3-phenyl-1H-indazole was obtained as the major product together with 4,5,6,7-tetrahydro-2-methyl-3-phenyl-2H-indazole as a minor product. 相似文献