Preparation of .beta., .gamma.-unsaturated carboxylic acids
US5041642A · kind A · utility
7Cited by
1References
24Claims
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Inventor
Key dates
| Filing date | Dec 30, 1985 |
| Grant date | Aug 20, 1991 |
| Priority date | — |
| Expiry date | Dec 30, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/14
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
.beta.,.gamma.-Unsaturated carboxylic acids are facilely prepared by carbonylating a conjugated diene with carbon monoxide in the presence of (i) water, (ii) a halogenated hydracid, (iii) a palladium catalyst comprising palladium metal or supported palladium metal, a palladium oxide, or a complex salt of palladium, the anion coordinated to the palladium cation of which comprising a hard or borderline base, and (iv) a quaternary onium salt of nitrogen, phosphorus or arsenic, said N, P or As being tetra-coordinated to a carbon atom, the anion of which comprising a hard or borderline base.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.