Abstract
Compounds of formulae (IA) or (IB) wherein R is hydrogen or a lower alkyl group or COR?15, R?1, R?2, R?11 and R?12, are hydrogen or a lower alkyl group, R?3, R?4, R?5 and R?6 are hydrogen, hydroxy, halogen, a lower alkyl group, a lower alkoxy group or a mono- or di-lower alkyl amino group, NH2? or NR?13COR?14, R?7, R?8, R?9 and R?10 are hydrogen, hydroxy, a lower alkyl group, a lower alkoxy group, a mono- or di-lower alkyl-amino group, or NH?13COR?14 wherein R?13, R?14 and R?15 are hydrogen or a lower alkyl group, enantiomers and salts thereof, with the proviso that when R is COR?15 then at least one of R?3 to R?10 are hydroxy or a mono or di-lower alkylamino group, are useful as antioxidants, within the medical and non-medical field. Many of the compounds of formulae (IA) and (IB) are new and various methods for preparing them are described.
| Original language | English |
|---|---|
| Patent number | WO9015799 |
| IPC | 61K31/40,A61K31/403,C07D209/94 |
| Priority date | 22/06/89 |
| Publication status | Published - 27 Dec 1990 |