Synthesis and AMPA Receptor Antagonistic Activity of a Novel 7-Imidazolyl-6-trifluoromethyl Quinoxalinecarboxylic Acid with a Substituted Phenyl Group and Improved Its Good Physicochemical Properties by Introduced CF3 Group.
2005
We describe the synthesis, physicochemical, and biological properties of a novel series of 7-imidazolyl-6-trifluoromethyl quinoxalinecarboxylic acids with a substituted phenyl group attached through a urethane linkage at the C-7 position. We found that the introduction of trifluoromethyl group at the C-6 position brought about good biological activity and physicochemical properties. Among them, compound 9k (KRP-199), which has a 4-carboxyphenyl group, was found to possess high potency and selectivity for the AMPA-R in vitro and to exhibit good neuroprotective effects in vivo. Furthermore, the compound showed good physicochemical properties such as stability to light and good solubility in aqueous solutions.
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