Radiosynthesis of<sup>13</sup>N-labeled thalidomide using no-carrier-added [<sup>13</sup>N]NH<sub>3</sub>
作者:Katsushi Kumata、Makoto Takei、Masanao Ogawa、Joji Yui、Akiko Hatori、Kazutoshi Suzuki、Ming-Rong Zhang
DOI:10.1002/jlcr.1699
日期:——
Recent studies revealed that thalidomide (1) has unique and broad pharmacological effects on multi-targets although the application of 1 in therapy is still controversial. In this study, we synthesized nitrogen-13-labeled thalidomide ([13N]1) as a potential positron emission tomography (PET) probe using no-carrier-added [13N]NH3 as a labeling agent. By use of an automated system, [13N]1 was prepared by reacting N-phthaloylglutamic anhydride (2) with [13N]NH3, following by cyclization with carbonyldiimidazole in a radiochemical yield of 56±12% (based on [11N]NH3, corrected for decay) and specific activity of 49±24 GBq/µmol at the end of synthesis (EOS). At EOS, 570–780 MBq (n=7) of [13N]1 was obtained at a beam current of 15 µA after 15 min proton bombardment with a synthesis time of 14 min from the end of bombardment. Using a small animal PET scanner, preliminary biodistribution of [13N]1 in mice was examined. Copyright © 2010 John Wiley & Sons, Ltd.
最近的研究表明,沙利度胺(1)对多靶点具有独特而广泛的药理作用,但其在治疗中的应用仍存在争议。本研究以无载体添加的[13N]NH3为标记剂,合成了氮-13标记的沙利度胺([13N]1),作为一种潜在的正电子发射断层扫描(PET)探针。[13N]1是利用自动化系统,通过N-邻苯二甲酰基谷氨酸酐(2)与[13N]NH3反应,然后与羰基二咪唑环化制备而成的,其放射化学收率为56±12%(基于[11N]NH3,经衰减校正),合成结束(EOS)时的比活度为49±24 GBq/µmol。在 EOS 时,质子轰击 15 分钟后,以 15 µA 的束流获得 570-780 MBq(n=7)的[13N]1,从轰击结束算起,合成时间为 14 分钟。利用小型动物 PET 扫描仪对 [13N]1 在小鼠体内的初步生物分布进行了检测。Copyright © 2010 John Wiley & Sons, Ltd. All Rights Reserved.