One-pot radiosynthesis of [<sup>13</sup>N]urea and [<sup>13</sup>N]carbamate using no-carrier-added [<sup>13</sup>N]NH<sub>3</sub>
作者:Katsushi Kumata、Makoto Takei、Masanao Ogawa、Koichi Kato、Kazutoshi Suzuki、Ming-Rong Zhang
DOI:10.1002/jlcr.1584
日期:2009.5.15
The aim of this study was to develop a practical labeling method of [13N]ligands using no-carrier-added [13N]NH3 with high specific activity. [13N]urea analogues [13N]1a and [13N]2a or [13N]carbamate [13N]3a were synthesized by reacting isocyanate 5a, carbamoyl chloride 6a or chloroformate 7a with [13N]NH3. The precursors 5a–7a were prepared by treating amines 8a and 9a and alcohol 10a with triphosgene in situ. These reaction mixtures were not purified and were used directly for [13N]ammonolysis, respectively. Using the one-pot method, we synthesized [13N]carbamazepine ([13N]4), a putative positron emission tomography ligand for brain imaging. Copyright © 2009 John Wiley & Sons, Ltd.
本研究旨在开发一种实用的[13N]配体标记方法,使用高比活性的无载体添加[13N]NH3。通过异氰酸酯5a、氨基甲酰氯6a或氯甲酸酯7a与[13N]NH3反应,合成了[13N]尿素类似物[13N]1a和[13N]2a或[13N]氨基甲酸酯[13N]3a。前体5a-7a是通过胺8a和9a以及醇10a与三光气原位处理制备的。这些反应混合物未经纯化,直接用于[13N]氨解反应。采用一步法,我们合成了一种用于脑部成像的正电子发射断层扫描配体[13N]卡马西平([13N]4)。版权所有 © 2009 John Wiley & Sons, Ltd.