Resolution of enantiomers of herbicidal 2-(4-aryloxyphenoxy) propionates by chiral two-phase extraction
US4831147A · kind A · utility
11Cited by
2References
13Claims
0Family size
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Key dates
| Filing date | Jul 5, 1988 |
| Grant date | May 16, 1989 |
| Priority date | — |
| Expiry date | Jul 5, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/487
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Racemic mixtures of 2-(4-aryloxyphenoxy)propionic acids are resolved into their optically active enantiomers by dissolving the racemate with at least one equivalent of a cinchona alkaloid in a halogenated hydrocarbon solvent and by extracting with a polyhydroxylic solvent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.