Synthesis and Evaluation of New Fluorine-18 Labeled Verapamil Analogs To Investigate the Function of P-Glycoprotein in the Blood–Brain Barrier
作者:Renske M. Raaphorst、Gert Luurtsema、Robert C. Schuit、Esther J. M. Kooijman、Philip H. Elsinga、Adriaan A. Lammertsma、Albert D. Windhorst
DOI:10.1021/acschemneuro.7b00086
日期:2017.9.20
blood–brain barrier. (R)-[11C]Verapamil is widely used as a PET tracer to investigate its function in patients with epilepsy, Alzheimer’s disease, and other neurodegenerative diseases. Currently it is not possible to use this successful tracer in clinics without a cyclotron, because of the short half-life of carbon-11. We developed two new fluorine-18 labeled (R)-verapamil analogs, with the benefit of a longer
P-糖蛋白是位于血脑屏障中的外排转运蛋白。(R)-[ 11 C]维拉帕米被广泛用作PET示踪剂,以研究其在癫痫,阿尔茨海默氏病和其他神经退行性疾病患者中的功能。由于碳11的半衰期短,目前无法在没有回旋加速器的诊所中使用这种成功的示踪剂。我们开发了两个新的氟18标记的(R)-维拉帕米类似物,具有更长的半衰期。(R)-N- [ 18 F]氟乙基维拉帕米([ 18 F] 1)和(R)-O- [ 18已经描述了F]氟乙基去甲维拉帕米([ 18 F] 2)。[ 18 F] 1是在(R)-去甲拉帕米与从溴乙基甲苯磺酸盐和三硫酸银柱中获得的挥发性[ 18 F]氟乙基三氟甲磺酸盐的反应中获得的,其放射化学产率为2.7%±1.2%。[ 18 F] 2通过前体13的直接氟化进行了放射性标记,需要用TFA进行最终的Boc脱保护,其放射化学产率为17.2%±9.9%。两种示踪剂,[ 18 F] 1和[ 18 F]