Bridged 5,6,7,8-Tetrahydro-1,6-naphthyridines, Analogues of Huperzine A: Synthesis, Modelling Studies and Evaluation as Inhibitors of Acetylcholinesterase
作者:Sofie Vanlaer、Arnout Voet、Constant Gielens、Marc De Maeyer、Frans Compernolle
DOI:10.1002/ejoc.200800972
日期:2009.2
Derivatives of 6,8-bridged 5,6,7,8-tetrahydro-1,6-naphthyridines, designed as analogues of huperzine A, were synthesised and evaluated as inhibitors of acetylcholinesterase. In a first approach, C3-bridged naphthyridines were constructed by internal nucleophilic aromatic substitution of 2-chloro-3-(1-piperidinylmethyl)pyridine precursors containing a 3-CO2Me group on the 1-piperidinyl ring moiety.
6,8-桥接 5,6,7,8-四氢-1,6-萘啶的衍生物,设计为石杉碱 A 的类似物,合成并评估为乙酰胆碱酯酶抑制剂。在第一种方法中,C3-桥接萘啶是通过内部亲核芳香取代 2-氯-3-(1-哌啶基甲基)吡啶前体在 1-哌啶基环部分上含有 3-CO2Me 基团来构建的。或者,应用 6,8-二烯丙基取代的四氢-1,6-萘啶的闭环复分解来构建不饱和 C4 桥。一些目标化合物显示出对乙酰胆碱酯酶的抑制,但低于石杉碱甲。抑制活性的相对顺序可以通过基于乙酰胆碱酯酶 - 石杉碱甲复合物的已知晶体结构的比较对接模拟研究来合理化。