Process for making .alpha.,.beta.-unsaturated carboxylic acids
US5910606A · kind A · utility
9Cited by
3References
11Claims
0Family size
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Key dates
| Filing date | Jan 10, 1997 |
| Grant date | Jun 8, 1999 |
| Priority date | — |
| Expiry date | Jan 10, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/36
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
.alpha., .beta.-Unsaturated acids of the formula ##STR1## wherein R.sup.1 signifies C.sub.1 -C.sub.5 -alkyl and Ar signifies an aryl group which is optionally substituted by one or more substituents selected from the group consisting of halogen, phenyl, C.sub.1 -C.sub.5 -alkyl, C.sub.1 -C.sub.5 -alkoxy, perfluorinated C.sub.1 -C.sub.5 -alkyl or perfluorinated C.sub.1 -C.sub.5 -alkoxy can be obtained from new or known compounds of the formula ##STR2## Compounds I can be converted by asymmetric hydrogenation into corresponding optically active saturated acids.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.