Process for producing high purity 3,5-dihydroxy-6-heptenoic acid derivative
US7692018B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 22, 2004 |
| Grant date | Apr 6, 2010 |
| Priority date | — |
| Expiry date | Aug 12, 2027 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D215/14
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
A process for producing a high purity 3,5-dihydroxy6-heptenoic acid derivative by controlling the content of impurities such as denatured substances, is provided. When a 3,5-dihydroxy-6-heptenoic acid derivative is produced by a process which comprises a step of contacting the 3,5-dihydroxy-6-heptenoic acid derivative of the formula (1) wherein R is a C1-4 alkyl group, with a C1-4 lower alcohol-containing solvent, an alcohol containing solvent having its content of an oxidizing substance lowered, is used to at most 0.05 molar equivalent to a 3,5-dihydroxy-6-heptenoic acid derivative, to suppress impurities contained in the 3,5-dihydroxy-6heptenoic acid derivative.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.