Synthesis of carbon-11 labeled fluorinated 2-arylbenzothiazoles as novel potential PET cancer imaging agents
作者:Min Wang、Mingzhang Gao、Bruce H. Mock、Kathy D. Miller、George W. Sledge、Gary D. Hutchins、Qi-Huang Zheng
DOI:10.1016/j.bmc.2006.08.026
日期:2006.12
benzyl ether group of compound 6a using H(2)/Pd-C provided the precursor 4-fluoro-2-(3-hydroxy-4-methoxyphenyl)benzothiazole (7) for radiolabeling. Synthesis of radiolabeling precursors and the reference standards 5- and 6-fluorinated arylbenzothiazoles (11c-n) was achieved via the reaction of o-aminothiophenol disulfides with substituted benzaldehydes under reducing conditions. The target radiotracers carbon-11
氟化的2-芳基苯并噻唑是新的潜在抗肿瘤药物,对乳腺癌,肺癌和结肠癌细胞系表现出有效的选择性抑制活性。碳11标记的氟化2-芳基苯并噻唑可作为正电子发射断层扫描(PET)成像癌症中酪氨酸激酶的新型探针。通过以下方法制备4-氟代2-芳基苯并噻唑4-氟-2-(3-苄氧基-4-甲氧基苯基)苯并噻唑(6a)和4-氟-2-(3,4-二甲氧基苯基)苯并噻唑(6b) Jacobson硫代苯胺基自由基环化化学的修饰。使用H(2)/ Pd-C对化合物6a的苄基醚基进行氢解裂解,可提供用于放射性标记的前体4-氟-2-(3-羟基-4-甲氧基苯基)苯并噻唑(7)。通过在还原条件下使邻氨基硫酚二硫化物与取代的苯甲醛反应,可以合成放射性标记的前体和参考标准的5和6氟代芳基苯并噻唑(11c-n)。目标放射性示踪剂碳11标记为4-,5-和6-氟化的芳基苯并噻唑(3-[(11)C] 6b,4-[(11)C] 11c,3-[(11)C]