Radiosynthesis of 1-(4-(2-[<sup>18</sup>F]fluoroethoxy)benzenesulfonyl)-3-butyl urea: a potential<i>β</i>-cell imaging agent
作者:Ralf Schirrmacher、Michael Weber、Alexander Schmitz、Chyng-Yann Shiue、Abass A. Alavi、Peter Feilen、Stefan Schneider、Peter Kann、Frank Rösch
DOI:10.1002/jlcr.599
日期:2002.8
Tolbutamide (1) is a sulfonurea agent used to stimulate insulin secretion in type 2 diabetic patients. Its analogue 1-(4-(2-[18F]fluoroethoxy)benzenesulfonyl)-3-butyl urea (3) was synthesized in overall radiochemical yields of 45% as a potential β-cell imaging agent. Compound 3 was synthesized by 18F-fluoroalkylation of the corresponding hydroxy precursor (2) with 2-[18F]fluoroethyltosylate in DMF at 120°C for 10 min followed by purification with HPLC in a synthesis time of 50 min. Insulin secretion experiments of the authentic 19F-standard compound on rat islets showed that the compound has a similar stimulating effect on insulin secretion as that of tolbutamide (1). The partition coefficient of compound 3 between octanol/water was determined to be 1.3±0.3 (n=5). Copyright © 2002 John Wiley & Sons, Ltd.
托布他胺(1)是一种磺脲类药物,用于刺激 2 型糖尿病患者的胰岛素分泌。我们合成了其类似物 1-(4-(2-[18F]氟乙氧基)苯磺酰基)-3-丁基脲(3),其放射化学收率为 45%,是一种潜在的 β 细胞成像剂。化合物 3 是通过相应的羟基前体(2)与 2-[18F]氟乙基对甲苯磺酸酯在 DMF 中进行 18F 氟烷基化反应合成的,反应时间为 120°C 10 分钟,然后用 HPLC 进行纯化,合成时间为 50 分钟。19F 标准化合物真品在大鼠胰岛上的胰岛素分泌实验表明,该化合物对胰岛素分泌的刺激作用与托布他胺(1)相似。经测定,化合物 3 在辛醇/水之间的分配系数为 1.3±0.3 (n=5)。Copyright © 2002 John Wiley & Sons, Ltd. All Rights Reserved.