10-aryl-1,8-dihydroxy-9- anthrones and their esters
US4889865A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 21, 1989 |
| Grant date | Dec 26, 1989 |
| Priority date | — |
| Expiry date | Feb 21, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D333/24
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Mono, di and tri-esters of 1,8-dihydroxy-10-phenyl-9-anthrone or -9-anthranol have the formula ##STR1## wherein p is 0 or 1, PA1 (a) when p=0, t=1 and R.sub.2 represents hydrogen or --COR.sub.3, PA1 (b) when p=1, t=0 and R.sub.1 and R.sub.2 each independently represent hydrogen or --COR.sub.3, PA1 R.sub.3 represents linear or branched alkyl having 1-17 carbon atoms, cycloalkyl, phenyl or phenyl substituted by lower alkyl, lower alkoxy, halogen, a nitro function, --CF.sub.3 or a hydroxyl function, and mixtures of said esters. These esters are prepared by reacting 1,8-dihydroxy-10-phenyl-9-anthrone with an activated form of an acid. The esters are useful in human or veterinary medicine and in cosmetic compositions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.