Malcolm Sainsbury (Inventor), G Shertzer, Howard (Inventor)

Research output: Patent


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 languageEnglish
Patent numberWO9015799
Priority date22/06/89
Publication statusPublished - 27 Dec 1990


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