Process for the carbonylation of diolefins
US4259519A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 19, 1978 |
| Grant date | Mar 31, 1981 |
| Priority date | — |
| Expiry date | Jul 19, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/36
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Conjugated diolefins (e.g., 1,3-butadiene) are carbonylated by the palladium-catalyzed addition of carbon monoxide and an alcohol of the formula ROH (e.g., benzyl alcohol) whereby polycarboxylic esters are formed in which the pair of double bonds of the conjugated diolefin has been transformed into a moiety having the formula: ##STR1## In the process, the olefin, carbon monoxide, and alcohol are reacted in the presence of a palladium(II) salt, a copper(II) salt, and a base, at certain concentrations and at a pressure and temperature sufficient to effect the carbonylation. The resulting unsaturated diester can be hydrolyzed and hydrogenated or vice versa to obtain the corresponding linear diacid (e.g., adipic acid).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.