Process for the preparation of 4,4'-dinitrodiphenylamine
US4990673A · kind A · utility
3Cited by
3References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 16, 1989 |
| Grant date | Feb 5, 1991 |
| Priority date | — |
| Expiry date | Nov 16, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C211/56
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Process for the preparation of 4,4'-dinitrodiphenylamine which comprises reacting 1 mole of 4-halonitrobenzene with about 1 to about 3 moles of an alkali metal cyanate in the presence of about 0.5 to about 5 moles of water in dimethylsulfoxide at temperatures of about 150.degree. to about 170.degree. C.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.