The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 13, 2018
Filed:
Apr. 01, 2015
Arkema France, Colombes, FR;
Gregory Schmidt, Saint Andeol le Chateau, FR;
Sophie Audureau, Feyzin, FR;
ARKEMA FRANCE, Colombes, FR;
Abstract
A process for preparing a fluoro compound of formula: R—(SO)—NX—(SO)—F (III) including: (a) a first step for obtaining the chloro compound of formula: R—(SO)—NX—(SO)—Cl; (II) this first step including the reaction of the sulfamide of formula: R—(SO)—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 σ; if Rrepresents Cl, then Rrepresents OH; otherwise, Ris identical to R; and if Rrepresents Cl, then Rrepresents F; otherwise, Ris identical to R.