(R,S)-1-(3-Hydroxy-4-methoxybenzoyl)-3-hydroxy-2-pyrrolidinone intermediates therefor and use for treating cerebral insufficiency
US4452807A · kind A · utility
9Cited by
1References
7Claims
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Key dates
| Filing date | Jan 20, 1982 |
| Grant date | Jun 5, 1984 |
| Priority date | — |
| Expiry date | Jan 20, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P20/55
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
1-(3-Hydroxy-4-methoxybenzoyl)-3-hydroxy-2-pyrrolidinone of the formula ##STR1## suitable for the control or prevention of cerebral insufficiency is described. The compound contains an asymmetric carbon atom. Therefore, the two optically active enantiomeric forms as well as the racemate are described. The compound of formula I can be prepared by cleaving the protecting group(s) from a corresponding compound in which at least one of the two hydroxy groups is protected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.