Synthesis of 5- and 6-substituted 2-(4-dimethylaminophenyl)-1,3-benzoxazoles and their in vitro and in vivo evaluation as imaging agents for amyloid plaque
作者:Sven H. Hausner、David Alagille、Andrei O. Koren、Louis Amici、Julie K. Staley、Kelly P. Cosgrove、Ronald M. Baldwin、Gilles D. Tamagnan
DOI:10.1016/j.bmcl.2008.05.033
日期:2009.1
A series of novel 5- and 6-substituted 2-(4-dimethylaminophenyl)-1,3-benzoxazoles was synthesized and their potential as imaging probes for Alzheimer’s Disease (AD)-related amyloid plaque was evaluated in vitro and in vivo. In vitro binding affinities for Aβ1–40 peptide of several of these compounds were in the low-nanomolar range . The lowest Ki of 9.3 nM was found for N-(2-(4-(dimethylamino)phenyl)-1
合成了一系列新型 5-和 6-取代 2-(4-二甲基氨基苯基)-1,3-苯并恶唑,并在体外和体内评估了它们作为阿尔茨海默病 (AD) 相关淀粉样蛋白斑块成像探针的潜力。其中几种化合物的 Aβ1-40 肽的体外结合亲和力在低纳摩尔范围内。N- (2-(4-(二甲氨基)苯基)-1,3-苯并恶唑-5-基)-4-碘苯甲酰胺( 1e )的最低K i为9.3 nM 。随后通过相应的三丁基甲锡烷基前体的碘脱烷基化制备其123 I-放射性标记形式([ 123 I] 1e),并使用 SPECT 成像在狒狒模型中进行体内评估。与我们的预期相反,1e没有在任何显着程度上穿过血脑屏障 (BBB)。