Synthesis and Radioligand Binding Studies of C-5- and C-8-Substituted 1-(3,4-Dimethoxybenzyl)-2,2-dimethyl-1,2,3,4-tetrahydroisoquinoliniums as SK Channel Blockers Related to <i>N</i>-Methyl-laudanosine and <i>N</i>-Methyl-noscapine
作者:Amaury Graulich、Jacqueline Scuvée-Moreau、Vincent Seutin、Jean-François Liégeois
DOI:10.1021/jm049025p
日期:2005.7.1
N-methyl-noscapine. A bulky alkyl substituent in the C-8 position of the tetrahydroisoquinoline produces a clear increase in the affinity for the apamin sensitive binding sites. The presence of an electron-withdrawing group in the C-5 and C-8 positions is not a suitable substitution for the affinity of drugs structurally related to N-methyl-laudanosine. Thiophenic analogues and 8-methoxy derivatives possess a poor
原始C-5-和C-8取代的1-(3,4-二甲氧基-苄基)-2,2-二甲基-1,2,3,4-的合成及(125)I-氨基甲酰胺的结合研究为了找到可逆的选择性SK通道阻滞剂,进行了四氢异喹啉鎓和1-(3,4-二甲氧基-苄基)-6,6-二甲基-4,5,6,7-四氢噻吩并[2,3-c]吡啶鎓的研究在结构上与N-甲基-月桂氨酸和N-甲基-芥子碱有关。在四氢异喹啉的C-8位上的大体积烷基取代基使对apapamin敏感的结合位点的亲和力明显增加。在C-5和C-8位置存在一个吸电子基团,并不适合替代与N-甲基-月桂丹碱结构相关的药物的亲和力。噻吩类似物和8-甲氧基衍生物对甜菜素敏感的结合位点具有较弱的亲和力。