Aromatic derivatives of butyric acid, a process for their preparation and their use in cosmetics and in human and veterinary medicine
US5068393A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 4, 1988 |
| Grant date | Nov 26, 1991 |
| Priority date | — |
| Expiry date | Apr 4, 2008 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C2602/10
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
An aromatic deviative of butyric acid has the formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4, each independently, represent hydrogen or alkyl, with at least two of R.sub.1 -R.sub.4 being other than hydrogen, PA1 A represents methylene or dimethylene; when A represents dimethylene, R.sub.1 and R.sub.3 can together form methylene or dimethylene, PA1 R.sub.5 and R.sub.6 represent hydrogen, halogen, alkyl, alkoxy or hydroxy, PA1 R' represents hydrogen, hydroxy, alkoxy or acyloxy, PA1 R" represents hydrogen or alkoxy, or R' and R" taken together form oxo or hydroxyimino, PA1 R.sub.8 represents hydrogen or alkyl and PA1 R.sub.7 represents --OR.sub.9 or ##STR2## R.sub.9 represents hydrogen, alkyl, monohydroxyalkyl, polyhydroxyalkyl, aryl or aralkyl, optionally substituted, a sugar residue, carboxyalkyl or alkoxycarbonylalkyl, PA1 r' and r" represent hydrogen, alkyl, monohydroxyalkyl optionally interrupted by a heteroatom, polyhydroxyalkyl, aryl or benzyl optionally substituted, amino acid residue or aminated sugar residue, or r' and r" taken together form a heterocycle, optionally substituted by a C.sub.1 -C.sub.3 hydroxyalkyl, and to the salts of the compounds of formula …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.