Synthesis and SAR of 1,2-trans-(1-hydroxy-3-phenylprop-1-yl)cyclopentane carboxamide derivatives, a new class of sodium channel blockers
摘要:
Novel cyclopentane-based 3-phenyl-1-hydroxypropyl compounds were evaluated for inhibitory activity against the peripheral nerve sodium channel Na(v)1.7 and off-target activity against the cardiac potassium channel hERG. The stereochemistry of the hydroxyl group and substitution on the phenyl rings with either fluorinated O-alkyl or alkyl groups were found to be critical, for conferring potency against Na(v)1.7. A benchmark compound from this series displayed efficacy in rat models of inflammatory and neuropathic pain. (C) 2005 Elsevier Ltd. All rights reserved.
The UV irradiation of 1-cyclopentenyl phenethyl ketone in benzene or methanol gave a cyclobutane derivative. The irradiation of 1-cyclohexenyl phenethyl ketone in methanol or in benzene containing either BF3–Et2O or CF3COOH gave a cycloheptanone derivative. The formation of the cycloheptanone derivative requires an acid catalyst.