Process
US4083857A · kind A · utility
2Cited by
1References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 31, 1976 |
| Grant date | Apr 11, 1978 |
| Priority date | — |
| Expiry date | Mar 31, 1996 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D311/16
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
There is provided a process for the preparation of coumarin derivatives of the formula: ##STR1## (wherein R represents substituted or unsubstituted alkyl, aryl or aralkyl, R.sup.1 represents alkanoyl, and the hydroxy and R.sup.1 substituents are ortho to one another) in which a hydroxy-substituted coumarin of the formula: ##STR2## is acylated in the presence of a Friedel-Crafts catalyst. The compounds of formula I are intermediates in the preparation of certain pharmaceutically-active chromones.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.