Novel Benzofuran Derivatives for PET Imaging of β-Amyloid Plaques in Alzheimer's Disease Brains
作者:Masahiro Ono、Hidekazu Kawashima、Akemi Nonaka、Tomoki Kawai、Mamoru Haratake、Hiroshi Mori、Mei-Ping Kung、Hank F. Kung、Hideo Saji、Morio Nakayama
DOI:10.1021/jm051176k
日期:2006.5.1
homogenates were carried out with a series of benzofuran derivatives, all the derivatives examined displayed high binding affinities with K(i) values in the subnanomolar range. Among these benzofuran derivatives, compound 8, 5-hydroxy-2-(4-methyaminophenyl)benzofuran, showed the lowest K(i) value (0.7 nM). In vitro fluorescent labeling of AD sections with compound 8 intensely stained not only amyloid plaques
合成和评估了一系列新型的苯并呋喃衍生物,作为针对阿尔茨海默病(AD)中淀粉样蛋白斑的潜在正电子发射断层扫描(PET)示踪剂。三苯基phosph盐和4-硝基苯甲酰氯之间的分子内维蒂希反应成功地完成了苯并呋喃的合成。当使用一系列苯并呋喃衍生物进行使用AD脑灰质匀浆的体外结合研究时,所有检查的衍生物均显示出亚纳摩尔范围内K(i)值的高结合亲和力。在这些苯并呋喃衍生物中,化合物8、5-羟基-2-(4-甲基氨基苯基)苯并呋喃显示出最低的K(i)值(0.7 nM)。用化合物8对AD切片进行体外荧光标记不仅对淀粉样蛋白斑块,而且对神经原纤维缠结都进行了强烈染色。通过使正甲基前体5-羟基-2-(4-氨基苯基)苯并呋喃与[(11)C]三氟甲磺酸甲酯反应,制备(11)C标记的化合物8 [[(11)C] 8]。[(11)C] 8表现出中等的亲脂性(log P = 2.36),非常好的脑渗透性(在小鼠静脉内注射后2分钟时为4