Manufacture of 5-cyanovaleric acid and its esters using cyclic cosolvents
US4950778A · kind A · utility
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5References
11Claims
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Key dates
| Filing date | Nov 8, 1989 |
| Grant date | Aug 21, 1990 |
| Priority date | — |
| Expiry date | Nov 8, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C255/19
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Manufacture of 5-cyanovaleric acid by carbonylation of pentenenitriles from a mixture consisting essentially of pentenenitrile, CO and at least one compound of the formula ROH, where R is hydrogen or alkyl of 1 to 6 carbon atoms, and a cyclic urea and/or a cyclic amide, where the combined weight of the cosolvents is between about 70% and 99% of the total weight of the reaction mixture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.