PROBLEM TO BE SOLVED: To provide a compound for visualizing TRPA1 in an organism. SOLUTION: The invention provides a compound represented by the formula (1) or (2) in the figure or a salt thereof. (In the formulas, R1 and R2 are each a substituent having a radioisotope.) SELECTED DRAWING: None COPYRIGHT: (C)2021,JPOandINPIT
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(2021/08/13)
Discovery, optimization, and biological evaluation of 5-(2- (trifluoromethyl)phenyl)indazoles as a novel class of transient receptor potential A1 (TRPA1) antagonists
A high throughput screening campaign identified 5-(2-chlorophenyl)indazole compound 4 as an antagonist of the transient receptor potential A1 (TRPA1) ion channel with IC50 = 1.23 μM. Hit to lead medicinal chemistry optimization established the SAR around the indazole ring system, demonstrating that a trifluoromethyl group at the 2-position of the phenyl ring in combination with various substituents at the 6-position of the indazole ring greatly contributed to improvements in vitro activity. Further lead optimization resulted in the identification of compound 31, a potent and selective antagonist of TRPA1 in vitro (IC50 = 0.015 μM), which has moderate oral bioavailability in rodents and demonstrates robust activity in vivo in several rodent models of inflammatory pain.
Rooney, Lisa,Vidal, Agnès,D'Souza, Anne-Marie,Devereux, Nick,Masick, Brian,Boissel, Valerie,West, Ryan,Head, Victoria,Stringer, Rowan,Lao, Jianmin,Petrus, Matt J.,Patapoutian, Ardem,Nash, Mark,Stoakley, Natalie,Panesar, Moh,Verkuyl, J. Martin,Schumacher, Andrew M.,Petrassi, H. Michael,Tully, David C.
p. 5129 - 5140
(2014/07/08)
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