申请人:UNIVERSITY OF BATH
公开号:EP0404536A1
公开(公告)日:1990-12-27
Compounds of the formula
wherein R is hydrogen or a lower alkyl group,
R¹ and R² are independently selected from hydrogen or a lower alkyl group, R³, R⁴ and R⁶ are independently selected from hydrogen, halogen or a lower alkyl group,
R⁵ is hydrogen, hydroxy, halogen, a lower alkyl group, a lower alkoxy group, a mono- or di-lower alkylamino group, NH₂ or NR¹¹ COR¹²,
R⁷, R⁸, R⁹ and R¹⁰ are independently selected from hydrogen, hydroxy, a lower alkyl group, a lower alkoxy group, a mono- or di-lower alkylamino group, NH₂ or NR¹¹ COR¹²,
R¹¹ is a hydrogen or a lower alkyl group,
R¹² is a lower alkyl group,
with the proviso that when R is hydrogen then at least one of the substituents R¹ to R¹⁰ is not hydrogen, or a salt thereof, are useful as antioxidants, within the medical and non medical field, and that when R is hydrogen, methyl or neopentyl in formula IA, then at least one of R¹ to R¹⁰ is not hydrogen. Many of the compounds of formula IA and IB are new and various methods for preparing them are described.
式中的化合物
其中 R 是氢或低级烷基、
R¹ 和 R² 独立选自氢或低级烷基,R³、R⁴ 和 R⁶ 独立选自氢、卤素或低级烷基、
R⁵ 是氢、羟基、卤素、低级烷基、低级烷氧基、单或双低级烷基氨基、NH₂ 或 NR¹¹ COR¹²、
R⁷、R⁸、R⁹ 和 R¹⁰ 独立选自氢、羟基、低级烷基、低级烷氧基、单或双低级烷基氨基、NH₂ 或 NR¹¹ COR¹²、
R¹¹ 是氢或低级烷基、
R¹² 是低级烷基、
但当 R 为氢时,R¹ 至 R¹⁰ 中至少有一个取代基不为氢,或其盐类在医疗和非医疗领域可用作抗氧化剂;当式 IA 中 R 为氢、甲基或新戊基时,R¹ 至 R¹⁰ 中至少有一个取代基不为氢。式 IA 和 IB 的许多化合物都是新化合物,并介绍了制备它们的各种方法。