Process for the preparation of cis-1,2-trans-4-cyclohexane tricarboxylic acid and esters
US5145987A · kind A · utility
7Cited by
3References
6Claims
0Family size
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Inventor
Key dates
| Filing date | May 22, 1991 |
| Grant date | Sep 8, 1992 |
| Priority date | — |
| Expiry date | May 22, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C67/38
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process is disclosed for preparing cyclohexane tricarboxylic acids and esters thereof comprising contacting carbon monoxide, cis-1,2,3,6-tetrahydrophthalic acid anhydride and water or a lower alkanol at elevated pressure and temperature and in the presence of a palladium complex and an ether solvent wherein the selectivity to cis-1,2-trans-4-cyclohexane tricarboxylic acids and esters thereof is greater than that obtained in the absence of the ether solvent.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.