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.
1-bromononafluorocyclohexeneand 1-bromoheptafluorocyclopentene undergo reductivecoupling reactions when heated with copper bronze to give 1,4-dichlorotetrafluorobuta-1,3-diene and perfluorobicyclo-hex-1,1′-enyl and -pent-1,1′-enyl, respectively. The same olefins undergo crossed coupling reactions with phenyl and pentafluorophenyl halides and, in the first case, with 1-iodoheptafluoropropane.
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.