Abstract
This study explored the potential of perfumery compounds as sources of transient receptor potential ankyrin 1 (TRPA1) inhibitors that could be formulated for effective delivery to the skin and airways. A highly potent, small, and selective TRPA1 inhibitor, 2-methyl-4-phenyl-1-pentanol (1), was discovered in perfumery compounds. Compound 1 demonstrated promising inhibitory activity against a broad range of TRPA1 agonists. A single stereoisomer of 1 was identified as the most effective TRPA1 inhibitor, indicating the potential for stereoselective synthesis to enhance its potency. Additionally, the structure–activity relationship of 1 was evaluated to elucidate the structural features of TRPA1 inhibitors within the fragrance-like compounds. Notably, the topical application of 1 alleviated sensory irritation in individuals with sensitive skin, while the inhalation of 1 resulted in a significant reduction in ammonia irritation, underscoring its efficacy in both skin and airway applications.
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