Preparation of n-aryl amines from isocyanates
US5041670A · kind A · utility
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2References
18Claims
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Key dates
| Filing date | Mar 29, 1988 |
| Grant date | Aug 20, 1991 |
| Priority date | — |
| Expiry date | Mar 29, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C209/62
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Methods of producing N-phenyl amines comprise reacting a phenyl-containing isocyanate with HR, and a boron complexing agent in an aprotic solvent, wherein R, is --OH or --COOH (i.e., water or formic acid), neutralizing the resulting N-aryl amide to N-aryl amine and recovering the N-aryl amine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.