Preparation of cyclic ketones
US5856581A · kind A · utility
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1References
40Claims
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Key dates
| Filing date | May 31, 1994 |
| Grant date | Jan 5, 1999 |
| Priority date | — |
| Expiry date | May 31, 2014 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C45/48
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Cyclic ketones, notably cyclopentanone and 2,2-dimethylcyclopentanone, are simply, economically and efficiently prepared, even on an industrial scale, by decarboxylating/cyclizing a dicarboxylic acid, in liquid phase, in the presence of a catalytically effective amount of a metal or compound thereof selected from among boron, aluminum, gallium, indium, thallium, tin, antimony, bismuth, molybdenum, rubidium, cesium and vanadium.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.