Benzyloxybenzylammonium chlorides: Simple amine salts that display anticonvulsant activity
2013
Lee, Hyosung | Gold, Alexander S. | Yang, Xiao-Fang | Khanna, Rajesh | Kohn, Harold
Several antiepileptic drugs exert their activities by inhibiting Na⁺ currents. Recent studies demonstrated that compounds containing a biaryl-linked motif (Ar-X-Ar′) modulate Na⁺ currents. We, and others, have reported that compounds with an embedded benzyloxyphenyl unit (ArOCH₂Ar′, OCH₂=X) exhibit potent anticonvulsant activities. Here, we show that benzyloxybenzylammonium chlorides (⁺H₃NCH₂C₆H₄OCH₂Ar′ Cl⁻) displayed notable activities in animal seizure models. Electrophysiological studies of 4-(2′-trifluoromethoxybenzyloxy)benzylammonium chloride (9) using embryonic cortical neurons demonstrated that 9 promoted both fast and slow inactivation of Na⁺ channels. These findings suggest that the potent anticonvulsant activities of the earlier compounds were due, in part, to the benzyloxyphenyl motif and provide support for the use of the biaryl-linked pharmacophore in future drug design efforts.
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