A New Preparative Method for 1-Chloro-2,2,3-trifluoropropane (HCFC-253ca)
Allene was both fluorinated and chlorofluorinated with chlorine monofluoride serving as a well-known chlorofluorinating and chlorinating reagent. 1-Chloro-2,2,3-trifluoropropane was obtained as a major product in the presence of cesium fluoride.
REACTIONS OF HALOGEN FLUORIDES. VII. FLUORINATION OF UNSATURATED COMPOUNDS WITH BROMINE TRIFLUORIDE AND AN EQUIMOLAR MIXTURE OF BROMINE TRIFLUORIDE WITH MOLECULAR BROMINE
The reactions of bromine trifluoride and an equimolar mixture of bromine trifluoride and bromine with halogen-substituted alkenes and methyl α-substituted acrylates were investigated.With sufficient dilution of the substrate by Freon 113 (20-25:1) it is possible to obtain the bromofluoro and difluoro adducts with good yiels.The best results (overall yields of fluorination products 80-83percent) were obtained with alkenes containing a halogen at the multiple bond; in the case of more reactive substrates the reaction becomes nonpreparative.The bromofluorination of E- and Z-1,2-dichloroethylenes and E- and Z-1,3-dichloropropenes with pure bromine trifluoride is antistereospecific.The bromofluorination of E- and Z-1,2-dichloroethylenes by the BrF3-Br2 system gives a mixture of diastereomeric bromofluoro adducts as a result of isomerization of the initial olefins in the presence of the bromine.The formation of the difluorides of the halogenated olefins is nonstereospecific and is accompanied by migration of the halogens.
Boguslavskaya, L. S.,Chuvatkin, N. N.,Kartashov, A. V.,Ternovskoi, L. A.
p. 230 - 236
(2007/10/02)
REACTION OF SULPHUR TETRAFLUORIDE WITH HALOGENATED ACETONES. THE EVIDENCE FOR PARTICIPATION OF FLUOROCARBOCATIONS
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Wielgat, Jerzy,Domagala, Zdzislaw,Kolinski, Ryszard A.
p. 182
(2007/10/02)
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