Synthesis of a Series of Structurally Diverse MB327 Derivatives and Their Affinity Characterization at the Nicotinic Acetylcholine Receptor
作者:Sebastian Rappenglück、Sonja Sichler、Georg Höfner、Thomas Wein、Karin V. Niessen、Thomas Seeger、Franz F. Paintner、Franz Worek、Horst Thiermann、Klaus T. Wanner
DOI:10.1002/cmdc.201800325
日期:2018.9.6
bispyridinium and related N‐heteroaromatic bisquaternary salts with a propane‐1,3‐diyl linker was synthesized and characterized for their binding affinity at the MB327 binding site of nicotinic acetylcholine receptor (nAChR) from Torpedo californica. Compounds targeting this binding site are of particular interest for research into new antidotes against organophosphate poisoning, as therapeutically active 4‐
合成了一系列新的30种对称双吡啶鎓和相关的N-杂芳族双季铵盐与丙烷-1,3-二基连接基,并表征了它们在加利福尼亚鱼雷的烟碱乙酰胆碱受体(nAChR)MB327结合位点的结合亲和力。靶向此结合位点的化合物对于研究针对有机磷酸酯中毒的新型解毒剂特别感兴趣,因为其具有治疗活性,可被4-叔丁基取代的双吡啶鎓盐MB327以前被鉴定为nAChR再敏化剂。通过新开发的方法可以有效地获得目标化合物,该方法可以使具有多种官能团的空间受阻或电子失活的杂环进行N烷基化。使用最近开发的基于质谱(MS)的结合测定法测定对nAChR处MB327结合位点的结合亲和力,结果表明几种化合物的亲和力与MB327相似(p K i = 4.73±0.03)。值得注意的是,发现新制备的亲脂性4-叔丁基-3-苯基取代的双吡啶鎓盐PTM0022(3 h)具有明显更高的结合亲和力,p Ki值为5.16±0.07,代表在开发更有效的nAChR再敏化剂方面取得了可观的进步。