Process for preparing 4-aminodiphenylamine intermediates
US6583320B2 · kind B2 · utility
13Cited by
1References
27Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 10, 2002 |
| Grant date | Jun 24, 2003 |
| Priority date | — |
| Expiry date | May 10, 2022 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C209/36
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention is directed-to a method of producing one or more 4-aminodiphenylamine intermediates comprising the steps of bringing an aniline or aniline derivative and nitrobenzene into reactive contact and reacting the aniline and nitrobenzene in a confined zone at a suitable time and temperature, in the presence of a mixture comprising an inorganic salt or metal organic salt having a cation that would be a suitable cation of a strong inorganic base, an oxidant and an organic base, the mixture not including a reaction product of betaine and a strong inorganic base.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.