Process for preparing 6-(lower) alkoxy-1-naphthoic acids and the corresponding esters and use of this process for preparing 6-(lower) alkoxy-5-halo-1-naphthoic acids and the corresponding esters
US4739100A · kind A · utility
4Cited by
0References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 27, 1985 |
| Grant date | Apr 19, 1988 |
| Priority date | — |
| Expiry date | Sep 27, 2005 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C51/09
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The present invention provides a process for preparing 6-(lower)alkoxy-1-naphthoic acids, the corresponding esters and 5-halo substituted derivatives thereof. The process comprises reacting furoic acid with an alkoxyphenyl compound, followed by acid hydrolysis to form a mixture of alkoxy and hydroxy substituted naphthoic acids, subjecting said mixture to the action of an alkylating agent, and optionally further treating the alkylated product to another hydrolysis step or a halogenation step.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.