Synthesis of Halogen-Substituted Pyridyl and Pyrimidyl Derivatives of [3,2-<i>c</i>]Pyrazolo Corticosteroids: Strategies for the Development of Glucocorticoid Receptor Mediated Imaging Agents
作者:Robert M. Hoyte、Jing-xin Zhang、Ronald Lerum、Aladejebi Oluyemi、Prita Persaud、Craig O'Connor、David C. Labaree、Richard B. Hochberg
DOI:10.1021/jm0202775
日期:2002.11.1
Ligands for the glucocorticoid receptor labeled with high-energy isotopes are highly desired for their potential applications in nuclear medical studies of the brain where the dysregulation of this receptor system is thought to be involved in various neurodegenerative disorders. Analogues of the glucocorticoid cortivazol have previously been prepared as target compounds for labeling with high-energy
迫切需要具有高能同位素标记的糖皮质激素受体的配体,因为它们在脑的核医学研究中具有潜在的应用前景,认为该受体系统的失调与多种神经退行性疾病有关。先前已经制备了糖皮质激素考替唑的类似物作为用于用高能同位素标记的目标化合物。然而,这种类型的芳基吡唑的苯环没有充分活化以进行放射性卤代类似物的合成通常所需的亲核取代反应。由于适当取代的芳族氮杂环基适合亲核取代,这项研究的目标是合成类似于Cortivazol的吡啶基吡唑和嘧啶基吡唑类似物,可以在吡啶或嘧啶环中用放射性卤素标记。我们描述了几个在吡唑环的2'位置含有吡啶基,卤代吡啶基和嘧啶基取代基的[3,2-c]吡唑并类固醇的合成。测试了这些化合物与糖皮质激素受体的结合以及在组织培养中生长的对糖皮质激素有反应的HeLa细胞中的生物学活性。在吡啶基和嘧啶基衍生物中,2'-(3-吡啶基)-11 beta,17,21-三羟基-16α-甲基-20-氧杂泼尼-4-eno