Preparation of alkanesulfonamides with low residual ammonium impurities
US5599983A · kind A · utility
0Cited by
5References
26Claims
0Family size
Inventors
Key dates
| Filing date | Aug 21, 1995 |
| Grant date | Feb 4, 1997 |
| Priority date | — |
| Expiry date | Aug 21, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C303/44
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A method is disclosed for the preparation of alkanesulfonamide containing low amounts of ammonium or alkylammonium-salt impurities wherein alkanesulfonamide is treated with a base to convert ammonium or alkylammonium-salt impurities to their corresponding base salts and to liberate neutral amine or ammonia.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.