Transformation de l'hexafluoropropène en alcool trifluoroallylique, précurseur des α-fluoroacrylates
摘要:
The alpha-fluoroacryloyl fluoride precursor of alpha-fluoroacrylic acid esters can arise from an allylic transposition of trifluoroallylic alcohol of which two methods of preparation are presented. In the first, dehydrofluoration of the alcohol CF3CFHCH(3)OH (4) is used. This alcohol is generated from the ester CF3CFHCOOC2H5 (3). In the second, dehalogenation of the alcohol CF3CFBrCH2OH (10) by zinc is used. The latter is formed by the selective reduction of the ester CF(3)CFBrCOOC2H(5) (9).
Fluorohalogeno compounds. I. The grignard reaction of some fluorohalogenoethanes
作者:I. Hemer、A. Pošta、V. Dědek
DOI:10.1016/s0022-1139(00)80974-4
日期:1984.12
An extension of the scope of the Grignardreaction of fluorinated compounds is reported. Fluorohalogenoethanes of the general formula CF3CXYZ ( X = F,Cl,Br ; Y,Z = Cl,Br ) were found to undergo smoothly the metal-halogen exchange reaction with alkyl- or aryl-magnesium halides at low temperature to yield organometallic compounds CF3CXYMgHal. The Grignard compounds were reacted with a series of aldehydes