Fluorinateddi-enes may be obtained by the defluorination of some oligomers of F-alkenes and -cycloalkenes using tetrakis(dimethylamino)ethene. These di-enes are very susceptible to nucleophilic attack. Nucleophilic epoxidation of (4) gives a new diepoxide which undergoes a novel ring-opening reaction. Di-ene (4) forms cyclopentadienylide derivatives with di-functional carbon nucleophiles and a cyclopentadienylide
作者:Mark W. Briscoe、Richard D. Chambers、Steven J. Mullins、Takayuki Nakamura、Frederick G. Drakesmith
DOI:10.1039/c39900001127
日期:——
Oligomers of perfluoroalkenes are converted to dienes in good yields, using sodium amalgam; these dienes are highly susceptible to nucleophilic attack and can be excellent sources of heterocycles.
Reactions involving fluoride ion. Part 18. Derivatives of perfluorocycloalkenes
作者:Richard D. Chambers、Graham Taylor、Richard L. Powell
DOI:10.1039/p19800000429
日期:——
Unlike perfluorocyclobutene, perfluorocyclo-pentene and -hexene do not form oligomers with pyridine. A range of oligomers is obtained from mixtures of perfluorocycloalkenes in reactions initiated by caesium fluoride. Products are also obtained from perfluorocycloalkenes with perfluoropropene and between perfluorocyclobutene and perfluorobut-2-ene. A variation is observed in the balance between exo-
Preparation of perfluoro-(1,2-dialkylcyclopentenes) and their photochemical isomerisation to perfluoro(1-alkenyl-1-alkylcyclopropanes)
作者:Janet V. Drayton (née Worthington)、William T. Flowers、Robert N. Haszeldine、Thomas A. Parry
DOI:10.1039/c39760000490
日期:——
Perfluoro-(1,2-dialkylcyclopentenes), conveniently prepared by the co-oligomerisation of a perfluoroalkene and perfluorocyclopentene, and photolysed in the liquid phase, undergo a 1,3-allylic shift to give the isomeric perfluoro-(1-alkenyl-1-alkylcyclopropanes) in high yield.
作者:Mark W. Briscoea、Richard D. Chambers、William Clegg、Vernon C. Gibsona、Steven J. Mullins、Julian F.S. Vaughan
DOI:10.1016/0022-1139(95)03335-1
日期:1996.1
(1a) and -butenyl (2a) react with decamethylferrocene (3), to give charge-transfersalts 4 and 5, respectively; perfluorohexakis(trifluoromethyl)cyclo-pentadiene (6) forms a salt (8) containing the C5(CF3)5 anion. Crystal structures of the salts 4 and 5 have been determined; both contain centrosymmetric trans-diene radical anions.