摘要:
An exploratory SAR study on a series of potent, non-apamin-displacing 4-(aminomethylaryl) pyrazolopyrimidine K-Ca channel blockers is described and their selectivity against K-Ca channel subtypes is reported. The most potent analog, 5-chloro-N-(thiophen-2-ylmethyl) pyrazolo[1,5-a] pyrimidin-7-amine (24) displayed sub-micromolar activity in both a thallium flux and whole-cell electrophysiology assay and did not displace apamin in a competitive binding study. (C) 2008 Elsevier Ltd. All rights reserved.