Atochem

Produits Chimiques Ugine Kuhlmann

P C U K Produits Chimiques Ugine Kuhlmann

Universite Montpellier Ii Sciences Et Techniques Du Languedoc

Patrick Calas

Auguste Andre Commeyras

Hubert Blancou

Jacques R Taillades

Louis Mion

Sylvie Benefice-Malouet

Sylvie Benefice

Patrice Moreau

Helene Collet

Henri Choukroun

Catherine Bied

Method for peptide synthesis starting from N- (N'-nitrosocarbamoyl)

The invention relates to the preparation of functionalized derivatives from iodopolyfluoroalkanes by electrochemical reduction. This reduction is carried out in a formamide or substituted formamide solvent which may contain up to 70% (by volume) water, on a carbon cathode; for certain embodiments sulfur dioxide may also be present. This method of preparing perfluoroalkanecarboxylic acids R.sub.F COOH or perfluoroalkanesulphinic acids, R.sub.F SO.sub.2 H and alcohols of the R.sub.F C.sub.2 H.sub.4 OH type, also makes it possible to prepare new fluorinated compounds of formulae: I--(CF.sub.2).sub.p-1 --COOH and HO.sub.2 S--(CF.sub.2).sub.p-1 --COOH, in which p is an even-numbered integer which may range from 4 to 12.

Functionalization of iodopolyfuorgalkanes by electrochemical reduction

Process for the preparation of true acetylene hydrocarbons with a perfluoro chain, characterized by dehydroiodination with an alkali metal hydroxde in an alcoholic medium of the iodohydrin ##STR1## wherein R.sub.F is a straight or branched perfluoroalkyl chain C.sub.n F.sub.2n+1 -- where n is 1 to 20, and R and R' are identical or different alkyl radicals, followed by distillation, in the presence of solid alkali metal hydroxide, of the resulting acetylenic alcohol obtained to produce a true acetylene hydrocarbon of the formula R.sub.F --C.tbd.CH. The acetylene hydrocarbons are useful for forming compounds having the ability to carry gases such as oxygen for biological purposes.

Process for the preparation of true acetylene hydrocarbons having a

The process for the addition of iodoperfluoroalkanes of the formula CF.sub.3 (CF.sub.2).sub.n I, in which n is an integer from 1 to 19, onto ethylenic or acetylenic compounds, by electrocatalysis of the mixture of reactants.

Process for the addition of iodoperfluoroalkanes onto ethylenic or

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Montpellier, France

Patrick Calas