Arkema France

Sophie Audureau

Grégory Schmidt

Gregory Schmidt

A process for preparing a fluoro compound of formula: R&#x2014;(SO)&#x2014;NX&#x2014;(SO)&#x2014;F (III) including: (a) a first step for obtaining the chloro compound of formula: R&#x2014;(SO)&#x2014;NX&#x2014;(SO)&#x2014;Cl; (II) this first step including the reaction of the sulfamide of formula: R&#x2014;(SO)&#x2014;NH(I) with a sulfureous acid and a chlorinating agent; and (b) a second step for obtaining the fluoro compound of formula (III), this second step including the reaction of the chloro compound of formula (II) with anhydrous hydrofluoric acid in at least one organic solvent; in which: X represents either a hydrogen atom or a monovalent cation M; Rrepresents an electron-withdrawing group having a positive Hammett parameter &#x3c3;; if Rrepresents Cl, then Rrepresents OH; otherwise, Ris identical to R; and if Rrepresents Cl, then Rrepresents F; otherwise, Ris identical to R.

Preparation of imides containing a fluorosulfonyl group

A fluorination process for obtaining fluorinated compounds including at least one fluorosulfonyl group. More particularly, a process for preparing a fluorinated compound of formula (II), including at least one step of reacting a compound of formula (I) with anhydrous hydrofluoric acid in at least one organic solvent, in which R1 is equal to R2 except in the specific case where R1&#x2550;Cl, then R2&#x2550;F, and when R1 is equal to R2, R1 and R2 represent an electron-withdrawing group which has a Hammett parameter &#x3c3;p of greater than 0, such as F, CF, CHF, CHF, CHF, CHF, CHF, CF, CF, CHF, CHF, CHF, CF, CHF, CHF, CF, CFOCF, CFOCF, CHFOCF, CFOCF, CF, CF, CFor CF, and M represents a hydrogen atom, an alkali metal, an alkaline-earth metal or a quaternary ammonium cation.

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Feyzin, France

Sophie Audureau