Process for separating folinic acid
US5134235A · kind A · utility
11Cited by
4References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 7, 1991 |
| Grant date | Jul 28, 1992 |
| Priority date | — |
| Expiry date | Mar 7, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D475/04
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Preparing (6S)-folinic acid and its salts, comprising recrystallization of alkaline-earth salts of (6R,S)-folinic acid and, where necessary, liberation of the acid from the alkaline-earth folinates and/or, where necessary, conversion into the alkali salts by at least one recrystallization in the presence of a base. Calcium-, magnesium-, potassium- and sodium-(6S)-folinates and (6S)-folinic acid are prepared.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.