A series of novel piperidine derivatives was prepared and their lipophilicity was determined (as RM values). These compounds as well as two intermediate alpha-keto-esters were tested for antioxidant activity. It was found that the cysteamine derivatives were efficient antioxidants, i.e. they could inhibit lipid peroxidation, act as hydroxyl radical scavengers and interact with 2,2-diphenyl-1-picrylhydrazyl
制备了一系列新颖的
哌啶衍
生物,并测定了它们的亲脂性(以RM值表示)。测试了这些化合物以及两种中间的α-酮基酯的抗氧化活性。发现半
胱胺衍
生物是有效的
抗氧化剂,即它们可以抑制脂质过氧化,充当羟基自由基清除剂并与2,2
-二苯基-1-
吡啶并
肼基自由基相互作用。这种相互作用可以归因于游离的SH基团,并且亲脂性增加似乎促进了这种活性。用NH2或OH取代SH会导致化合物的抗氧化活性降低。然而,至少在所应用的实验条件下,所描述的活性似乎与任何O 2-清除能力都不相关。此外,半
胱胺衍
生物似乎会诱导O2生成,通常在
硫醇化合物中观察到的现象。中间α-酮基酯的抗氧化活性是变化的,并且可能由不同的机制介导。