Method for producing 2-(.omega.-alkoxycarbonyl alkanoyl)-4-butanolide and a long-chain .omega.-hydroxycarboxylic acid
US5808106A · kind A · utility
4Cited by
1References
10Claims
0Family size
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Key dates
| Filing date | Apr 30, 1997 |
| Grant date | Sep 15, 1998 |
| Priority date | — |
| Expiry date | Apr 30, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/377
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
2-(.omega.-alkoxycarbonyl alkanoyl)-4-butanolide can be produced unexpectedly with a high selectivity and yield through condensation reaction of .gamma.-butyrolactone with a highly available, lo.omega.-price dicarboxylate as represented by the following general formula: EQU ROOC(CH2)nCOOR (where n denotes an integer of 7-13, and R denotes an alkyl group or an alkenyl group). Furthermore, a long-chain .omega.-hydroxycarboxylic acid can be produced by subjecting 2-(.omega.-alkoxycarbonyl alkanoyl)-4-butanolide to hydrolysis and decarboxylation and reducing the carbonyl groups in the resultant product into methylene groups.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.