Method for the synthesis of perfluorosulphonamides, perfluorosulphonamides and their salts, and a sulphonation reagent
US6297398A · kind A · utility
3Cited by
1References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 9, 1999 |
| Grant date | Oct 2, 2001 |
| Priority date | — |
| Expiry date | Nov 9, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C303/38
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention concerns a method of sulphonation characterised in that it consists in contacting a nucleophile whose nucleophilic atom is a nitrogen atom with a reagent comprising by successive or simultaneous addition: a heavy sulphonyl halide (i.e. whose atomic number is not less than that of chlorine), advantageously suphonyl chloride; and an organic base both not capable of alkylation and lipid soluble; and the organic part of said sulphonyl is perfluorinated on the carbon carried by the sulphur. The invention is applicable to organic synthesis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.