Synthesis and in vitro evaluation of [18F](R)-FEPAQ: A potential PET ligand for VEGFR2
作者:Jaya Prabhakaran、Victoria Arango、Vattoly J. Majo、Norman R. Simpson、Suham A. Kassir、Mark D. Underwood、Hanish Polavarapu、Jeffrey N. Bruce、Peter Canoll、J. John Mann、J.S. Dileep Kumar
DOI:10.1016/j.bmcl.2012.05.099
日期:2012.8
)-7-((1-(2-fluoroethyl)piperidin-3-yl)methoxy)-6-methoxyquinazolin-4-amine ((R)-[18F]FEPAQ or [18F]1), a potential imaging agent for the VEGFR2, using phosphor image autoradiography are described. Synthesis of 2, the desfluoroethyl precursor for (R)-FEPAQ was achieved from t-butyl 3-(hydroxymethyl)piperidine-1-carboxylate (3) in five steps and in 50% yield. [18F]1 was synthesized by reaction of sodium
[ 18 F]( R ) -N- (4-溴-2-氟苯基)-7-((1-(2-氟乙基)哌啶-3-基)甲氧基)-6-甲氧基喹唑啉-的合成及体外评价4-胺(( R )-[ 18 F]FEPAQ 或[ 18 F] 1),VEGFR2 的潜在显像剂,使用磷光图像放射自显影进行了描述。合成2,( R )-FEPAQ的去氟乙基前体是从3-(羟甲基)哌啶-1-羧酸叔丁酯 ( 3 ) 分五步以 50% 的产率合成的。[ 18 F] 1由化合物2的钠盐反应合成[ 18 F]氟乙基甲苯磺酸盐的DMSO溶液。[ 18 F] 1的产率为20%(EOS基于[ 18 F]F -),放射化学纯度> 99%,比活度为1-2 Ci/μmol ( n = 10)。总合成时间为75分钟。体外磷光成像研究表明,放射性示踪剂在人脑的载玻片切片中选择性标记了 VEGFR2,并且在手术切除的人胶质母细胞瘤切片中发现了更高的结合率。这些发现表明