Sorbinil by optical resolution of precursor 6-fluoro-4-ureidochroman-4-carboxylic acid
US4528387A · kind A · utility
1Cited by
4References
3Claims
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Key dates
| Filing date | Jan 9, 1984 |
| Grant date | Jul 9, 1985 |
| Priority date | — |
| Expiry date | Jan 9, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D311/68
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Sorbinil is obtained by cyclization of S-6-fluoro-4-ureidochromane-4-carboxylic acid, which is in turn obtained by resolution of racemic 6-fluoro-4-ureidochroman-4-carboxylic acid via diasteromeric salts with either D-(+)-(1-phenethyl)amine or L-(-)-ephedrine.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.