Human cancer and other clinical trials under development employing combretastatin A-4 phosphate (1b, CA4P) should benefit from the availability of a [11C]-labeled derivative for positron emission tomography (PET). In order to obtain a suitable precursor for addition of a [11C]methyl group at the penultimate step, several new synthetic pathways to CA4P were evaluated. Geometrical isomerization (Z to
正在开发的使用
考布他汀 A-4
磷酸盐 ( 1b , CA4P) 的人类癌症和其他临床试验应受益于用于正电子发射断层扫描 (PET)的 [ 11 C] 标记衍
生物的可用性。为了获得在倒数第二步添加[ 11 C] 甲基的合适前体,评估了几种新的 CA4P 合成途径。几何异构化(Z到E)被证明是一个挑战,但通过开发适用于 4-甲氧基同位素标记的新 CA4P 合成方法克服了这一挑战。