- Thermal desulfurization of (Alkoxymethyl)thiiranes
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Reaction of (alkoxymethyl)oxiranes with thiourea in methanol has afforded the corresponding thiiranes, and catalyst-free thermal desulfurization of the products has been studied. The major products of desulfurization are alcohols and alkenes, both in the cases of (polyfluoroalkyloxymethyl)thiiranes and their non-fluorinated analogs. Longer alkyl chain in thiiranes favors formation of alcohols over alkenes formation in the course of desulfurization.
- Nalet'Ko,Pervova,Gorbunova,Zapevalov, A. Ya,Toporova,Saloutin
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p. 2120 - 2124
(2015/02/02)
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- PROCESS FOR PRODUCING A-FLUOROALDEHYDES
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A production process of an α-fluoroaldehyde according to the present invention includes reaction of an α-fluoroester with hydrogen gas (H2) in the presence of a ruthenium complex. It is possible in the present invention to allow relatively easy industrial production of the α-fluoroaldehyde and to directly obtain, as stable synthetic equivalents of the α-fluoroaldehyde, not only a hydrate (as obtained by conventional techniques) but also a hemiacetal that is easy to purify and is of high value in synthetic applications. The present invention provides solutions to all problems in the conventional techniques and establishes the significantly useful process for production of the α-fluoroaldehyde.
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Paragraph 0092
(2014/06/24)
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- Polyfluoroalloxy phosphonic and phosphinic acid derivatives: I. 1-Hydroxy-2,2,2-trichloroethylphosphinates
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Polyfluoroalkyl esters of 1-hydroxy-2,2,2-trichloroethylphosphonic and aryl(alkyl-)phosphinic acids exhibited antienzyme activity towards esterases of animal and microbial origin. A good correlation is observed between high antiesterase activity of the target compounds and their physicochemical parameters, characterizing their structure.
- Krutikova,Krutikov,Erkin
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scheme or table
p. 428 - 433
(2010/08/04)
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- Polyfluoroalkoxy phosphonic and phosphinic acid derivatives: II. Reversible esterase inhibitors
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Polyfluoroalkyl esters of phosphoric, alkylphosphonic and 1-hydroxypolyfluoroalkylphosphonic acids exhibited significant antiesterase activity against various esterases of animal and microbial origin. Moreover, with some compounds reversible inhibition of enzymes was observed due to the specific influence of hydrophobic fragments of the target products.
- Krutikova,Krutikov,Erkin
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experimental part
p. 434 - 439
(2010/08/04)
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- Transformation of perfluorinated benzocycloalkenes and alkylbenzenes to their carbonyl derivatives under the action of CF3COOH/SbF5
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Perfluorinated benzocycloalkenes (benzocyclobutene, indan, tetralin), alkylbenzocycloalkenes and alkylbenzenes react with CF3COOH/SbF5 at 20-50 °C giving the corresponding carbonyl derivatives.
- Zonov, Yaroslav V.,Karpov, Victor M.,Platonov, Vyacheslav E.
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p. 1058 - 1064
(2008/02/10)
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- Spectrokinetic study of the reaction system of 2NO2?N 2O4 with some fluorinated derivatives of ethanol and propanols between 293-358 K in the gas phase
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The gas phase kinetics of the reversible reactions between nitrogen tetroxide and some fluorinated alcohols in the reaction system 2NO 2?N2O4 (1, 2) N2O4 + ROH?RONO+ + HNO3 (3, 4) have been studied by UV-Vis spectrophotometry to follow the NO2 decay. The products - RONO (R = CH2FCH2, CHF2CH2, CF 3CH2, CHF2CF2CH2, CF 3CF2CH2, CF3CHCF3) - were identified by their UV spectra and the values of the maxima UV absorption cross sections were determined in the range 320-400 nm. The rate constants for the forward reaction are 10-19k3av/cm 3molec-1s-1 9.7±1.5; 2.5±0.4; 1.8±0.3; 23±3.5, 2.3±0.3, 0.2±0.03 and for the reverse reaction 10-19k4av/cm 3molec-1s-1 4.6±0.7; 5.5±0.8; 4.9±0.7; 9.1±1.4; 7.7±1.2; 23±3.5 at 298 K for the reaction with 2-fluoroethanol, 2,2-difluoroethanol, 2,2,2-trifluoroethanol, 2,2,3,3-tetrafluoro-1-propanol, 2,2,3,3,3-pentafluoro-1-propanol and 1,1,1,3,3,3-hexafluoro-2-propanol, respectively, were derived by the computer simulation of monitored NO2 decay profiles. The temperature dependence of the bimolecular rate constants k3 and k4 were studied in the temperature range 293-358 K and the activation energy for the forward E3 and for the reverse E4 reaction were derived. From the observed temperature dependence of the equilibrium constants K3,4, expressed in terms of the van't Hoff equation, the thermochemical parameters for all reactions studied were estimated.
- Wojcik-Pastuszka,Golonka,Ratajczak
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p. 1559 - 1574
(2008/02/04)
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- PROCESS FOR PRODUCING FLUOROALKANOL
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A process for producing a fluoroalkanol of high purity containing little evaporation residue, which can be industrially easily carried out with high selectivity, is provided. In the process, a radial initiator and CF2=CFR3 (formula 3) are continuously added to CHR1R2-OH (Formula 2) to react them to form H-(CFR3CF2)n-CR1R2-OH (formula 1). In the formulae, n is an integer of from 1 to 4, each of R1 and R2 is a hydrogen atom or a C1-3 alkyl group, and R3 is a fluorine atom or a C1-4 perfluoroalkyl group.
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Page column 6
(2008/06/13)
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- Process for producing a fluoroalkanol
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A process for producing a fluoroalkanol of high purity containing little evaporation residue, which can be industrially easily carried out with high selectivity, is provided. In the process, a radial initiator and CF2=CFR3 (formula 3) are continuously added to CHR1R2—OH (Formula 2) to react them to form H—(CFR3CF2)n—CR1R2—OH (formula 1). In the formulae, n is an integer of from 1 to 4, each of R1 and R2 is a hydrogen atom or a C1-3 alkyl group, and R3 is a fluorine atom or a C1-4 perfluoroalkyl group.
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- PHOTOCHEMICAL SYNTHESIS OF FLUOROALKANOLS BASED ON TETRAFLUOROETHYLENE
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The conditions of the photochemical synthesis of fluoroalkanols H(C2F4)nC(OH)R1R2 (n = 1, 2) by the reaction of tetrafluoroethylene with alcohols in the presence of photoinitiators and sensitisers are described.The reaction is initiated by UV radiation and is performed under atmospheric pressure.The yields of alkanols were 0.1-0.39 mol using 250 W UV lamp after 6-8 hours and 73-82 percent relatively to the converted tetrafluoroethylene.
- Paleta, O.,Dedek, V.,Reutschek, H.,Timpe, H.-J.
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p. 345 - 354
(2007/10/02)
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- COMPOUNDS WITH A TELLURIUM-NITROGEN BOND. Y. POLYFLUOROALKOXYHALOGENO- AND POLYFLUOROALKOXYAMINOTELLURANES
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The reaction of tetrakis(polyfluoroalkoxy)telluranes with tellurium tetrahalides leads to the production of mixed polyfluoroalkoxyhalogenotelluranes.The reaction of the polyfluoroalkoxyhalogenotelluranes with silylated secondary amines and hexamethyldisilylbenzenesulfonamide leads to the formation of derivatives of hydroxyaminotelluranes and N,N-bis(phenylsulfonyl)tellurium diimide.
- Stukalo, E. A.,Yur'eva, E. M.,Markovskii, L. N.
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p. 2305 - 2309
(2007/10/02)
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