Synthesis and Quantitative Structure−Activity Relationship of a Novel Series of Small Conductance Ca<sup>2+</sup>-Activated K<sup>+</sup> Channel Blockers Related to Dequalinium
作者:Dimitrios Galanakis、Carole A. Davis、C. Robin Ganellin、Philip M. Dunn
DOI:10.1021/jm950520i
日期:1996.1.1
The synthesis, pharmacological testing, and quantitative structure-activity relationship studies of a novel series of bisquinolinium small conductance Ca(2+)-activated K+ channel blockers (23) related to dequalinium are described. In this series, two quinolinium rings are linked via the 4-position to an alpha, omega-diamino alkylene chain and the ring N atom is quaternized with a methyl or benzyl group
合成,药理学测试和定量结构-活性关系研究的一系列新的双喹啉鎓小电导Ca(2+)激活的K +通道阻滞剂(23)与qualaniumium有关。在该系列中,两个喹啉鎓环通过4位连接至α,ω-二氨基亚烷基链,并且环N原子被甲基或苄基季铵化。环外的N原子可以被O,S或CH2取代,但有一定的效能损失。喹啉基团不必被季铵化以阻止其活性,只要它们的碱性足以在作用部位被质子化即可。对于季化合物,连接到喹啉环N原子上的基团R具有相当大的空间耐受性;苄基在该系列中具有最佳效价。而且,与先前报道的非喹啉类似物的结果相反,活性与先前报道的非喹啉类似物的结果没有相关性,活性与N1电荷或EHOMO也没有相关性。另一方面,在化合物的封闭效能与ELUMO之间获得了良好的相关性[pEMR = 1.16(+/- 0.26)ELUMO + 5.33(+/- 01.29)(n = 11,r = 0.83,s = 0.243 )]