Preparation of arylsulfonyl (alkyl) amides
US4996360A · kind A · utility
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10Claims
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Key dates
| Filing date | Mar 15, 1989 |
| Grant date | Feb 26, 1991 |
| Priority date | — |
| Expiry date | Mar 15, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C303/38
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The arylsulfonyl(alkyl)amides, notably N-(n-butyl)benzenesulfonamide, well adopted as heat-stable plasticizers for polyamides, e.g., nylon 11 and nylon 12, are directly prepared by (a) intimately contacting an arylsulfonyl halide with a stoichiometric excess of both an alkylamine and an alkaline agent, with the alkaline agent being present in aqueous solution, (b) eliminating water and excess alkylamine from the organic phase produced in stage (a), and (c) separating final product arylsulfonyl(alkyl)amide from the residual organic phase remaining after stage (b).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.