fluorine acceptor which defluorinates perfluoroalkanes with the partial structure (Rf)2CFCF(Rf)2 to alkenes and perfluoroalkenes to dienes. Carbon catalyzes double-bond shifts, as well as cis/trans and ring-chain perfluoro-olefin isomerizations. Carbon effectively catalyzes TFE and HFP dimerizations. Less effectively, carbon catalyzes further oligomerization of TFE to give low yields of linear, internal olefins
Reactions involving fluoride ion. Part 23. Thermolytic defluorination of perfluoroalkenes in the synthesis of fluorinated dienes and cyclobutenes
作者:Richard D. Chambers、Andrew A. Lindley、Harold C. Fielding、John S. Moilliet、Graham Whittaker
DOI:10.1039/p19810001064
日期:——
3-dimethylbutadiene (over Pt) and perfluoro-3,4-dimethylhexa-2,4-diene (over Fe), together with other products. Similar reactions occur with other fluorinated alkenes and the variation between fragmentation and defluorination is rationalised on the basis of the metal used, etc. The fluoride induced reaction between perfluoropropene and perfluorobut-2-ene gives perfluoro-2,3-dimethylpent-2-ene.
Reactions involving fluoride ion. Part 29. Reactions of perfluoro-2,3-dimethylbuta-1,3-diene
作者:Martin R. Bryce、Richard D. Chambers、Andrew A. Lindley、Harold C. Fielding
DOI:10.1039/p19830002451
日期:——
Reactions of perfluoro-2,3-dimethylbutadiene (1) with methanol, phenol, and sodium methoxide yield products arising from substitution; with methanol a 1,2-addition product is also observed. Reactions of (1) with enolate anions derived from ethyl acetoacetate and acetylacetone yield pyran derivatives, and an oxepine. The diene (1) undergoes free radical addition with methanol, and cycloaddition with
Syntheses and reactions of some fluorinated dienes, cyclobutenes and furans
作者:RD Chambers、HC Fielding、AA Lindley
DOI:10.1016/s0022-1139(00)84065-8
日期:1980.12
organic compounds, including the defluorination of cyclic fluorocarbons over iron to give aromatic compounds. Extending this technique we have investigated the flow pyrolysis of some readily accessible unsaturated fluorocarbons, such as I, II, and III, and found these to be synthetically useful routes to fluorinated dienes, cyclobutenes, and furans. Pyrolyses were carried out using a nitrogen flow over