Process for the production of 1,3-cyclopentanedione
US5113012A · kind A · utility
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Key dates
| Filing date | Aug 26, 1991 |
| Grant date | May 12, 1992 |
| Priority date | — |
| Expiry date | Aug 26, 2011 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C45/673
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for the production of 1,3-cyclopentanedione, which is a versatile intermediate product for numerous active ingredient syntheses. For this purpose, a malonic acid ester is reacted with a haloalkoxybutenoic acid ester, the resultant bis-(alkoxycarbonyl)alkoxypentenoic acid ester is cyclized to alkoxycarbonyl alkoxycyclopentenone, the ester function is saponified, and finally the intermediate is decarboxylated to the end product.
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