Structure–activity relationships of diphenylpiperazine N-type calcium channel inhibitors
摘要:
A novel series of compounds derived from the previously reported N-type calcium channel blocker NP118809 (1-(4-benzhydrylpiperazin-1-yl)-3,3-diphenylpropan-1-one) is described. Extensive SAR studies resulted in compounds with IC50 values in the range of 10-150 nM and selectivity over the L-type channels up to nearly 1200-fold. Orally administered compounds 5 and 21 exhibited both anti-allodynic and anti-hyperalgesic activity in the spinal nerve ligation model of neuropathic pain. (C) 2010 Elsevier Ltd. All rights reserved.
Urea derivatives which comprise piperidine or piperazine rings and further substitution are effective in ameliorating conditions characterized by unwanted calcium ion channel activity.