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1.
A simple procedure for the synthesis of fluorinated isoxazolidines from perfluoro-2-methylpent-2-ene and aliphatic aldoximes is described.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 8, pp. 1449–1451, August, 1994. 相似文献
2.
G. G. Furin Yu. V. Gatilov I. Yu. Bagryanskaya E. L. Zhuzhgov 《Russian Chemical Bulletin》1999,48(8):1558-1562
Reaction of perfluoro-2-methylpent-2-ene with ethylenediamine and hexamethylenediamine results in 9-fluoro-5,9-bis(pentafluoroethyl)-6,8,8-tris(trifluoromethyl)-1,4-diazabicyclo[5.2.0]nona-4,6-diene,
whose structure was confirmed by X-ray analysis, and 11-pentafluoroethyl-10-trifluoromethyl-1,8-diazabicyclo[7.2.0]undeca-8,10-diene,
respectively. The reaction pathways are discussed.
Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 8, pp. 1578–1582, August, 1999. 相似文献
3.
Furin G. G. Gatilov Yu. V. Bagryanskaya I. Yu. Zhuzhgov E. L. 《Russian Chemical Bulletin》2001,50(3):476-479
Perfluoro-2-methylpent-2-ene and perfluoro-5-azanon-4-ene react with guanidine hydrochloride in the presence of triethylamine to give 2-amino-6-fluoro-4-pentafluoroethyl-5-trifluoromethylpyrimidine and 2-amino-4,6-bis(heptafluoropropyl)-1,3,5-triazine, respectively. The structure of the former product was confirmed by X-ray diffraction analysis. 相似文献
4.
L. S. German S. A. Postovoi E. M. Kagramanova Yu. V. Zeifman 《Russian Chemical Bulletin》1997,46(11):1920-1923
4-Fluoro-6-pentafluoroethyl-5-trifluoromethylpyrimidines have been synthesized by the reaction of perfluoro-2-methylpent-2-ene with aceto- and trifluoroacetoamidines. The high activity of the fluorine atom at position 4 of these compounds in reactions with nucleophilic reagents was found. 相似文献
5.
Rogoza A. V. Furin G. G. Gatilov Yu. V. Bagryanskaya I. Yu. 《Russian Chemical Bulletin》2001,50(6):1072-1077
The reactions of perfluoro-2-methylpent-2-en-3-yl isothiocyanate with ambident N,O- and N,S-nucleophiles (thiazole-2-thione, pyridine-2-thione, 2-hydroxypyridine, benzothiazole-2-thione, benzoxazole-2-thione, 3,4,5,6-tetrahydropyrimidine-2-thione) in the presence of triethylamine yield only 2-N-substituted 4,5-dihydrothiazole derivatives. The molecular structures of three products were determined by X-ray diffraction analysis. The reaction pathways are discussed. 相似文献
6.
Katarzyna Mitka Katarzyna Fela Aleksandra Olszewska Radomir Jasiski 《Molecules (Basel, Switzerland)》2021,26(23)
The molecular mechanism of the [3 + 2] cycloaddition reaction between C-arylnitrones and perfluoro 2-methylpent-2-ene was explored on the basis of DFT calculations. It was found that despite the polar nature of the intermolecular interactions, as well as the presence of fluorine atoms near the reaction centers, all reactions considered cycloaddition proceed via a one-step mechanism. All attempts for the localization of zwitterionic intermediates on the reaction paths were not successful. Similar results were obtained regardless of the level of theory applied. 相似文献
7.
A preparative one-step method for the synthesis of 1,1,1,5,5,5-hexafluoro-4-trifluoromethylpentane-2,3-dione dihydrazone from perfluoro-4-methylpent-2-ene and hydrazine hydrate has been developed. Oxidation of this dihydrazone with bromine in water gives 3-diazo-1,1,1,5,5,5-hexafluoro-4-trifluoromethylpentane-2-one. The same product is obtained from 3-hydrazono-1,1,1,5,5,5-hexafluoro-4-trifluoromethylpentane-2-one under similar conditions.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 11, pp. 2039–2041, November, 1994.This work was supported by the Russian Foundation for Basic Research (the project code 94-03-08548). 相似文献
8.
Rogoza A. V. Furin G. G. Bagryanskaya I. Yu. Gatilov Yu. V. 《Russian Chemical Bulletin》2001,50(8):1446-1448
The reaction of benzimidazoline-2-thione with perfluoro-2-methylpent-2-ene in the presence of triethylamine afforded (2E)-2-(tetrafluoroethylidene)-3,3-bis(trifluoromethyl)-2,3-dihydrothiazolo[3,2-a]benzimidazole whose structure was confirmed by X-ray diffraction analysis. The reaction pathways are discussed. 相似文献
9.
A new method was elaborated for the synthesis of vinylsilanes with polyfluoroalkoxy substituents at the silicon atom using the photoinitiated radical reaction of dialkoxy(methyl)vinylsilanes with perfluoro-4-metliylpent-2-ene in the presence of di-tert-butyl peroxide at room temperature.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 12, pp. 2976–2978, December, 1996, 相似文献
10.
M. Yu. Moskalik B. A. Shainyan U. Schilde 《Russian Journal of Organic Chemistry》2011,47(9):1271-1277
Reactions of trifluoromethanesulfonamide with α-methylstyrene, 2-methylpent-1-ene, and cycloocta-1,5-diene in the system t-BuOCl-NaI were studied. In the reaction with α-methylstyrene 1-iodo-2-phenylpropan-2-ol was the only isolated product. The
reaction with 2-methylpent-1-ene gave a mixture of N,N′-(2-methylpentane-1,2-diyl)bis(trifluoromethanesulfonamide), trifluoro-N-(2-hydroxy-2-methylpentyl)-methanesulfonamide, and N,N′-[oxybis(2-methylpentan-2,1-diyl)]bis(trifluoromethanesulfonamide). Trifluoromethanesulfonamide reacted with cycloocta-1,5-diene
to produce a mixture of 2,5-diiodo-9-(trifluoromethylsulfonyl)-9-azabicyclo[4.2.1]nonane and 2,5-diiodo-9-oxabicyclo[4.2.1]nonane;
this reaction may be regarded as the first example of direct assembly of bicyclononane skeleton. 相似文献
11.
G. G. Furin I. Yu. Bagryanskaya Yu. V. Gatilov E. L. Zhuzhgov 《Russian Chemical Bulletin》1998,47(10):1965-1970
Perfluoro-2-methylpent-2-en-3-yl isothiocyanate reacts with ethyl or isopropyl alcohols in the presence of NEt3 to give derivatives of 4,5-dihydrothiazole and ethoxy(ethylthio)methylene-(1,1,1,4,4,5,5,5-octafluoro-2-trifluoromethylpent-2-en-3-yl)amine
and isopropoxy(isopropylthio)methylene-(1,1,1,4,4,5,5,5-octafluoro-2-trifluoromethylpent-2-en-3-yl)amine, respectively. Heating
of ethyl or isopropylN-(perfluoro-2-methyl-2H-pentylidene-3-amino)thiocarbamate with potassium carbonate in DMF yields the same products plus 3-tetrafluoroethylidene-5,5-bis(trifluoromethyl)thiazolidin-2-one.
The structure of the latter was confirmed by X-ray diffraction analysis. The IR spectroscopy data for this compound in solution
(CCl4) and in the solid state (KBr) suggest the formation of the intermolecular NH...O=C hydrogen bond between the NH group and
the oxygen atom of the heterocycle.
Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 10, pp. 2021–2026, October, 1998. 相似文献
12.
G. G. Furin O. A. Luzina R. I. Sokuev M. P. Polovinka N. F. Salakhutdinov G. A. Tolstikov 《Russian Chemical Bulletin》2007,56(6):1244-1248
The reactions of the natural lichen metabolite, (+)-usnic acid, with a series of commercially available polyfluoroolefins
(tetrafluoroethylene, chlorotrifluoroethylene, hexafluoropropene, perfluoro-2-methylpent-2-ene, and 1,2-dichlorooctafluorocyclohex-1-ene)
afford its 7-O-polyfluoroalkyl and perfluorovinyl ethers.
Dedicated to the memory of Academician N. N. Vorozhtsov on the 100th anniversary of his birth.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 6, pp. 1198–1202, June, 2007. 相似文献
13.
K. A. Frolov V. V. Dotsenko S. G. Krivokolysko A. N. Chernega V. P. Litvinov 《Russian Chemical Bulletin》2005,54(5):1340-1342
Reduction of (E)-3-aryl-2-(4-arylthiazol-2-yl)acrylonitriles with lithium aluminum hydride in dry ether afforded (Z)-1-amino-3-aryl-2-(thiazol-2-yl)prop-1-ene derivatives in 15 to 40% yields. The structure of (Z)-1-amino-3-(2-chlorophenyl)-2-[4-(4-methylphenyl)thiazol-2-yl]prop-1-ene was confirmed by X-ray diffraction analysis.
Dedicated to Academician N. K. Kochetkov on the occasion of his 90th birthday.
__________
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 5, pp. 1301–1303, May, 2005. 相似文献
14.
Grzegorz Mlostoń Katarzyna Urbaniak Anthony Linden Heinz Heimgartner 《Helvetica chimica acta》2012,95(4):577-585
The attempted ethenylation at C(2) of 2‐unsubstituted 1H‐imidazole N‐oxides with ethyl acrylate (=prop‐2‐enoate) in the presence of Pd(OAc)2 does not occur. In contrast to the other aromatic N‐oxides, the [2+3] cycloaddition of imidazole N‐oxides predominates, and 3‐hydroxyacrylates, isomeric with the cycloadducts, are key products for the subsequent reaction. The final products were identified as dehydrated 2+1 adducts of 1H‐imidazole N‐oxide and ethyl acrylate. The role of the catalyst is limited to the dehydration of the intermediate 3‐hydroxypropanoates to give 1H‐imidazol‐2‐yl‐substituted acrylates. 相似文献
15.
Maria Giorgia Cutrufello Italo Ferino Elisabetta Rombi Vincenzo Solinas Gerardo Colón José Antonio Navío 《Reaction Kinetics and Catalysis Letters》2003,79(1):93-99
A ceria-lanthana catalytic system prepared by the sol-gel technique proved to be active in 4-methylpentan-2-ol conversion,
mainly leading to 4-methylpent-1-ene, a monomer for manufacturing polymers of high technological properties. The product distribution
strongly depends on the acid-base features of the catalyst. The catalytic behavior of the samples was examined in the light
of their acid-base properties.
This revised version was published online in June 2006 with corrections to the Cover Date. 相似文献
16.
G. G. Furin A. P. Krysin N. I. Protsuk V. A. Lopyrev 《Russian Journal of Organic Chemistry》2006,42(10):1429-1434
Reactions of perfluoro(2-methylpent-2-ene) and perfluoro(5-azanon-4-ene) with 4-(2-aminoethyl)-2,6-di-tert-butylphenol and 4-(3-aminopropyl)-2,6-di-tert-butylphenol in acetonitrile in the presence of triethylamine gave the corresponding azetidine, 1,2-dihydroazete, and 1,2-dihydro-1,3-diazete derivatives, respectively. The reaction mechanisms, role of triethylamine, and factors affecting the intramolecular nucleophilic cyclization process are discussed. 相似文献
17.
V. A. Grinberg T. A. Koch V. M. Mazin E. I. Mysov S. R. Sterlin 《Russian Chemical Bulletin》1997,46(9):1560-1564
The possibility of synthesizing dihydromuconic acid by cathodic carboxylation of 1,4-dibromobut-2-ene in the liquid CO2-aprotic solvent system was investigated. The low yield of dihydromuconic acid in this reaction was explained by the competing
reductive debromodimerization and oligomerization of 1,4-dibromobut-2-ene, which lead to the predominant formation of 1,8-dibromo-2,6-octadiene
and polymeric products.
Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 9, pp. 1637–1641, September, 1997. 相似文献
18.
5-Chloro-2-methylpent-2-ene decomposes at temperatures of 370–420°C with initial pressures from 61to 158 torr to yield hydrogen chloride and a mixture of methylpentadiene isomers. In a static system, with seasoned vessel and propene inhibitor, the reaction is homogeneous, unimolecular, and of the first order. The rate coefficient is expressed by the following Arrhenius equation: log k (sec?1) = (13.43 ± 0.30) ? (215.0 ± 3.7) kJ/mol/2.303RT. The result ofthe present work additionally supports the participation of the neighboringaliphatic olefinic double bond in the rate of HCl elimination of alkenyl chlorides in the gas phase. Moreover, it also confirms the three-membered conformation as the most favored structure for anchimeric assistance. 相似文献
19.
The reactions of (E)-2-diethylboryl-1-trimethylstannylbut-1-ene and (Z)-3-diethylboryl-2-trimethylstannylpent-2-ene with carbodiimides, methyl thiocyanate, thioisocyanates, and isocyanates were studied, and the products were characterized by multinuclear magnetic resonance spectroscopy (1H, 11B, 13C and 119Sn NMR). It was found that carbodiimides bearing tert-butyl or trimethylsilyl groups at the nitrogen atoms do not react with (E)-2-boryl-1-stannylalkenes, in contrast to dicyclohexylcarbodiimide. There was also no reaction in the case of MeSCN. All other reactions proceed via a weak NB adduct formation in the initial step, followed by different rearrangements, depending on the structure of reagents as well as on the substitution pattern at the C=C bond in alkenes. New heterocycles are formed, in which the boron atom is either tricoordinated (1,2-azaborolenes, 1,2-azaborolan! es), a nd one ethyl group has been transferred to the neighbor olefinic carbon atom, or the boron atom is tetracoordinated (1,2-azaboratoles, 1,2-oxoniaboratoles), and the trimethylstannyl group has migrated to one of the heteroatoms of the heterocumulenes. 相似文献
20.
Grzegorz Mlosto Marcin Jasiski Anthony Linden Heinz Heimgartner 《Helvetica chimica acta》2006,89(7):1304-1316
The reaction of 1,4,5‐trisubstituted 1H‐imidazole‐3‐oxides 1 with 2,2‐bis(trifluoromethyl)ethene‐1,1‐dicarbonitrile ( 7 , BTF) yielded the corresponding 1,3‐dihydro‐2H‐imidazol‐2‐ones 10 and 2‐(1,3‐dihydro‐2H‐imidazol‐2‐ylidene)malononitriles 11 , respectively, depending on the solvent used. In one example, a 1 : 1 complex, 12 , of the 1H‐imidazole 3‐oxide and hexafluoroacetone hydrate was isolated as a second product. The formation of the products is explained by a stepwise 1,3‐dipolar cycloaddition and subsequent fragmentation. The structures of 11d and 12 were established by X‐ray crystallography. 相似文献