Synthesis and optimization of novel α-phenylglycinamides as selective TRPM8 antagonists
2017
Abstract Transient receptor potential melastatin 8 (TRPM8) is activated by innocuous cold and chemical substances, and antagonists of this channel have been considered to be effective for pain and urinary diseases. N -(3-aminopropyl)-2-{[(3-methylphenyl)methyl]oxy}- N -(2-thienylmethyl)benzamide hydrochloride (AMTB), a TRPM8 antagonist, was proposed to be effective for overactive bladder and painful bladder syndrome; however, there is a potential risk of low blood pressure. We report herein the synthesis and structure–activity relationships of novel phenylglycine derivatives that led to the identification of KPR-2579 ( 20l ), a TRPM8 selective antagonist. KPR-2579 reduced the number of icilin-induced wet-dog shakes and rhythmic bladder contraction in rats, with no negative cardiovascular effects at the effective dose.
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