H. Blancou

Reactivite des perfluorohalogenoalcanes en presence de couples metalliques. Reactivite de perfluoroiodoalcanes sur des derives halogenes dans des solvants aprotiques dissociants (DMSO,DMF)

Abstract Perfluoroalkyl iodides (R F I) react with organic halide in dissociants solvents (DMF,DMSO) in the presence of zinc-copper couple through an organometallic route; in this way C 6 F 13 Cl, C 6 F 13 CH 2 CH 2 I, (C 6 F 13 ) 2 Zn have been prepared.

Mise au point d'un procede de preparation catalytique de perfluoroalkyl sulfonamide par addition d'ethylamine a un chlorure d'acide perfluoroalcane sulfonique

Abstract Addition of N-ethylamine to a perfluoroalkylsulfonic acid chloride R F SO 2 Cl has been studied, to obtain the corresponding perfluoroalkylsulfonamide R F SO 2 NHC 2 H 5 . First a two-step synthesis has been considered : transformation of the perfluoroalkylsulfonic acid chloride R F SO 2 Cl to the corresponding fluoride R F SO 2 F, and addition of N-ethylamine; the study of the first step is reported. Then, a sulfonamide one-step synthesis involving a fluoride catalysis, is described.

Synthése de fluoroalkyl éthanl : RFCH2CHO

Aldehydes RFCH2CHO (RF is a linear perfluoroalkyl chain) have been obtained in the addition reaction of RFI to vinyl acetate in the presence of zinc. RFCH2CHIOAc is formed as an intermediate in the course of the reaction. Under appropriate conditions, RFCH2CHO and its acylal or acetal derivatives are obtained in good yields.

Methode quantitative pour la preparation de perfluoroalcoyl-ethanol RFCH2CH2OH a partir de perfluoroalcoyl-2 iodo-1 ethane RFCH2CH2I. (RF CnF2n+1, n pair)

Abstract A new quantitative method to prepare the perfluoroalkyl ethanol (R F CH 2 CH 2 OH) via an organometallic route is described. The iodoperfluoroalkyl ethane (R F CH 2 CH 2 I) reacts with the metallic zinc-copper couple in particular solvents, especially butyl phosphate. The oxidation of the organozinc compound R F CH 2 CH 2 ZnI leads to an alcohol.

Synthese de perfluoro-nhexyl-2 ethanol C6F13C2H4 OH par reduction electrochimique sur fibres de carbone de perfluoro-nhexyl-2 iodo-1 ethane C6F13C2H4I dans le solvant N,N dimethylformamide.

Abstract Electrochemical reduction of 2-perfluoro-nhexyl-1-iodo-ethane at a carbon fibre cathode, in N,N-dimethylformamide as solvent, leads to the perfluoro-nhexyl-2-ethanol with perfluoro-nhexyl-2-ethylene as the major by-product. A mechanism is proposed on the basis of results obtained from macro-scale electrolysis and a study of Linear Sweep Voltammetry.

Synthese de trichloromethyl perfluoroalcanes [RFCCl3, RF=CaF2n+1 (n=4,6,8)]

Abstract A new synthesis of trichloromethyl perfluoroalkanes (R F CCl 3 ) is described. This is accomplished by reaction of a perfluoroalkyl iodide (R F I) with carbon tetrachloride or bromotrichloromethane and zinc metal, in a chlorinated solvent ; the influence of the solvent is discussed.

Synthèse de Trifluoromethyl-1 dihydro-1.2 Naphthalène

Abstract The reaction of CF 3 Br with naphthalene in presence of zinc powder in propionic acid leads to 1-trifluoromethyl,1-2-dihydronaphthalene.