A carbon-13 nuclear magnetic resonance study of compounds substituted by a perfluoroalkyl chain
摘要:
AbstractThe 13C NMR spectra of alkanes, alkanones and cyclohexanones substituted by perfluoroalkyl groups, RF, have been studied. The influence of the perfluoroalkyl group on the chemical shifts of other carbons of the molecules is the same regardless of the RF chain length.
Coupling between a fluorinated olefin and a perfluorinated iodide: a model study on the reaction mechanism of perfluorinated polymer cross-linking
作者:I. Wlassics、E. Barchiesi、M. Sala
DOI:10.1016/s0022-1139(03)00110-6
日期:2003.9
Markovnikov type reaction intermediate for the major coupling products between a short, low MW perfluorinated iodide C2F5I (I) and a short, low MW fluorinatedolefin CF3(CF2)7CHCH2 (II). The reaction is peroxide induced (di-t-butyl peroxide, DTBP) and is conducted at 140 °C for a 3 h reaction time in a sealed glass ampoule. Side reaction products due to the reaction of DTBP with radical reaction intermediates
An Effective Synthesis of 2-Trifluoromethyl- or 2-(1,1-Difluoroalkyl)thiophenes
作者:Hui-Ping Guan、Bing-Hao Luo、Chang-Ming Hu
DOI:10.1055/s-1997-1204
日期:1997.4
Various thiophenecarboxylates carrying a 2-trifluoromethyl, 2-(1,1-difluoroalkyl) or 2-polyfluoroalkyl group are synthesized conveniently from reaction of α-fluoroalkyl ketones 1, aldehydes 2 or ethyl α-fluoroalkylacetates 3 with methyl (or ethyl) 2-sulfanylacetates 4. A possible reaction pathway is suggested.
Reaction of Active Methylene Compounds with α-Fluoroalkyl Ketones or Esters: A Convenient Synthesis of 4-Trifluoromethylpyridines and meta-Trifluoromethylphenols
作者:Hui-Ping Guan、Chang-Ming Hu
DOI:10.1055/s-1996-4393
日期:1996.11
The reaction of α-fluoroalkyl ketones 1 or ethyl α-fluoroalkylacetates 2 with active methylene compounds such as methyl acetoacetate (3), acetylacetone (4) and diethyl malonate (5) produced unsaturated fluoroalkyl-containing 1,5-dicarbonyl compounds 6, from which polyalkyl-substituted 4-trifluoromethylpyridines 7, 4-trifluoromethylpryrid-2(1H)-ones 8 and meta-trifluoromethylphenols 9 were synthesized conveniently.
Electrochemical synthesis of perfluoroalkylacetones
作者:I. M. Vol'pin、M. A. Kurykin、V. A. Grinberg、Yu. B. Vasil'ev、L. S. German
DOI:10.1007/bf00961239
日期:1991.7
The interaction of electrochemically generated radicals in the electrolysis of the perfluorocarboxylic acids R(F)CF2COOH (I), where R(F) = F (a), CF3 (b), C2F5 (c), C3F7 (d), C5F11 (e), and C7H15 (f), with isopropenyl acetate (II) was studied. The dependence of the results of the electrolysis on the adsorption capacity of the anode permits the proposition that the interaction of (II) with the ECG-radicals occurs close to the surface of the electrode. The yield of the perfluoroalkylacetones comprised 30-37%.
Electrophilic acylation of fluoroolefines by unsaturated perfluoroacylfluorides
作者:S. Chepik、G. Belen'kii、V. Cherstkov、S.R. Sterlin、L.S. German