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In this study, a series of mono‐ and diallylphenol derivative were designed, synthesized, and evaluated as potential human 15‐lipoxygenase‐1 (15‐hLOX‐1) inhibitors. Radical scavenging potency of the synthetic allylphenol derivatives was assessed and the results were in accordance with lipoxygenase (LOX) inhibition potency. It was found that the electronic natures of allyl moiety and para substituents play the main role in radical scavenging activity and subsequently LOX inhibition potency of the synthetic inhibitors. Among the synthetic compounds, 2,6‐diallyl‐4‐(hexyloxy)phenol (42) and 2,6‐diallyl‐4‐aminophenol (47) showed the best results for LOX inhibition (IC50 = 0.88 and 0.80 μM, respectively). [ABSTRACT FROM AUTHOR]