Reaction of bistrifluoromethylaminosulphenyl chloride with fluoro-olefins and hexafluorobut-2-yne under free-radical conditions
作者:Colin F. Service、Anthony E. Tipping
DOI:10.1016/s0022-1139(00)84027-0
日期:1982.3
Reaction of bistrifluoromethylaminosulphenyl chloride with unsymmetrical fluoro-olefins in daylight or under photochemical conditions gives both possible 1:1 adducts (ca. 1:1 ratio) arising from homolytic fission of the SCl bond. Addition to octafluorobut-2-ene and hexafluorobut-2-yne gives mixtures of the syn- and anti- adducts.
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 39. Reactions of perfluorinated dienes with oxygen and sulphur nucleophiles
作者:Mark W. Briscoe、Richard D. Chambers、Steven J. Mullins、Takayuki Nakamura、Julian F. S. Vaughan
DOI:10.1039/p19940003119
日期:——
The order of reactivity of perfluorinated dienes towards methanol is 3 > 21 and the process is activated by release of angle strain. The diene 1 is hydrolysed to give perfluorotetramethyl-furan and the corresponding thiophene, is obtained by an analogous process using K2S. Hydrolysis of compounds 2 and 3 yields diketones that are strong acids. Reactions of phenols and thiophenols with 1 give aryl ethers
The photolysis of 2,3-bis(trifluoromethyl)thiophene gave an equilibrium mixture of 2,3- and 3,4-bis(trifluoromethyl)Dewarthiophenes, while that of 2,5-bis(trifluoromethyl)thiophene gave 2,4-bis(trifluoromethyl)-thiophene, which seemed to be formed through an intermediate other than the Dewar form.