New approach for the synthesis of [18F]fluoroethyltyrosine for cancer imaging: Simple, fast, and high yielding automated synthesis
作者:M. Zuhayra、A. Alfteimi、C. Von Forstner、U. Lützen、B. Meller、E. Henze
DOI:10.1016/j.bmc.2009.09.029
日期:2009.11
concerning the necessity of two purification steps during the synthesis including HPLC purification, which causes difficulties in the automation, moderate yields, and long synthesis times >60 min. A new approach for the synthesis of [18F]FET is developed starting from 2-bromoethyl triflate as precursor. After optimization of the synthesis parameters including the distillation step of [18F]-FCH2CH2Br
O-(2- [ 18 F]氟乙基)-1-酪氨酸([ 18 F] FET)是用于成像肿瘤中氨基酸代谢的首批18 F标记氨基酸之一。该示踪剂克服了[ 18 F]氟脱氧葡萄糖,[ 18 F] FDG和[ 11 C]蛋氨酸,[ 11 C] MET的缺点。然而,提供18 F [FET]的各种合成方法在合成过程中需要进行两个纯化步骤(包括HPLC纯化)时表现出很大的缺点,这会导致自动化困难,产率中等以及合成时间长(> 60分钟)。 以三氟甲磺酸2-溴乙酯为前体,开发了一种合成[ 18 F] FET的新方法。合成参数包括蒸馏步骤的优化后[ 18 F] -FCH 2 CH 2溴结合[最终纯化18使用简单的固相萃取而不是HPLC的运行合成[F] FET 18 F] FET可以大大简化,缩短和改进。放射化学产率(RCY)为约45%(未衰变校正和相对于[计算18 F]˚F -回旋加速器传递的活动)。轰击(EOB