Purification of 3,5-diaminobenzotrifluoride by selective precipitation of the hydrochloride salt
US5130490A · kind A · utility
3Cited by
4References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 25, 1991 |
| Grant date | Jul 14, 1992 |
| Priority date | — |
| Expiry date | Nov 25, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C209/84
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
3,5-Diaminobenzotrifluoride can be readily separated from 4-chloro-3,5-diaminobenzotrifluoride by the addition of hydrogen chloride. 3,5-Diaminobenzotrifluoride forms hydrochloride salt, while 4-chloro-3,5-diaminobenzotrifluoride does so much less readily.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.