Preparation of imides containing a fluorosulfonyl group
US10128525B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 1, 2015 |
| Grant date | Nov 13, 2018 |
| Priority date | — |
| Expiry date | Jul 18, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P70/50
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A process for preparing a fluoro compound of formula: R2—(SO2)—NX—(SO2)—F (III) including: (a) a first step for obtaining the chloro compound of formula: R1—(SO2)—NX—(SO2)—Cl; (II) this first step including the reaction of the sulfamide of formula: R0—(SO2)—NH2 (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; R1 represents an electron-withdrawing group having a positive Hammett parameter σp; if R1 represents Cl, then R0 represents OH; otherwise, R0 is identical to R1; and if R1 represents Cl, then R2 represents F; otherwise, R2 is identical to R1.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.