Process for purifying 7-dimethylamino-6-demethyl-6-deoxytetracycline
US5202449A · kind A · utility
9Cited by
2References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 27, 1991 |
| Grant date | Apr 13, 1993 |
| Priority date | — |
| Expiry date | Aug 27, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C231/24
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for purifying 7-dimenthylamino-6-demethyl-6-deoxytetracycline represented by the following formula, ##STR1## which comprises dissolving 7-dimethylamino-6-demethyl-6-deoxytetracycline or its hydrochloride having a lower purity in a mixed solvent of an alcohol and water by using hydrochloric acid and then adjusting the pH of the solution to 3.5 to 4.5 to recrystallize the hydrochloride having a higher purity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.