Process for the preparation of benzopyrans
US4931574A · kind A · utility
1Cited by
2References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 23, 1988 |
| Grant date | Jun 5, 1990 |
| Priority date | — |
| Expiry date | Aug 23, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D311/58
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The invention is directed to a process and intermediates for the preparation of benzopyrans such as racemic-6-acetyl-7-[5-(4-acetyl-3-hydroxy-2-propylphenoxy)pentyloxy]-3,4-d ihydro-2H-1-benzopyran-2-carboxylic acid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.