Synthesis of Bridgehead-Substituted Azabicyclo[2.2.1]heptane and -[3.3.1]nonane Derivatives for the Elaboration of α7 Nicotinic Ligands
作者:Franck Slowinski、Omar Ben Ayad、Julien Vache、Mourad Saady、Odile Leclerc、Alistair Lochead
DOI:10.1021/jo201501f
日期:2011.10.21
Azabicyclo[2.2.1]heptane and -[3.3.1]nonane scaffolds (X = Cl, Br) containing a pyridinyl substituent at the bridgehead position were prepared via two complementary chemical pathways, either by the transformation of a methoxy group into a synthetically valuable chlorine atom at the C-6 position of the pyridine moiety or by means of a regioselective C-6 deprotonation/halogenation process of the pyridine
通过两个互补的化学途径(通过将甲氧基转化为合成基团)制备了在桥头位置含有吡啶基取代基的氮杂双[2.2.1]庚烷和-[3.3.1]壬烷骨架(X = Cl,Br)在吡啶部分的C-6位置上的有价值的氯原子,或通过氯化或溴化作用举例说明的吡啶部分的区域选择性C-6去质子/卤化过程。然后将这些新产生的支架参与Suzuki-Miyaura偶联反应,以提供α7烟碱配体。在体外评估了这两个化学系列在α7烟碱受体上的亲和力,显示出纳摩尔浓度的效价比α4β2烟碱亚型具有显着的选择性。这些方法为这些α7烟碱支架和配体提供了一般途径。