Preparation of n-aryl amides from isocyanates
US5260483A · kind A · utility
6Cited by
18References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 9, 1991 |
| Grant date | Nov 9, 1993 |
| Priority date | — |
| Expiry date | Sep 9, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C231/10
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Methods of producing N-aryl amides comprise reacting an aromatic isocyanate compound with substantially anhydrous carboxylic acid and recovering the resulting N-aryl amide. Additionally, or alternatively, methods of forming N-aryl amides comprise reacting an aromatic isocyanate compound with substantially anhydrous carboxylic acid in the presence of an anhydrous hydrogen halide or hydrolytically unstable halide compound and recovering the resulting N-aryl amide. These reactions may occur in the presence of an aprotic solvent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.